me te a Seren te hot Py nn a he Pe RUSS 8 lotta crn eae ie Ratna or Sit eton 9 ra NG A Speen pow Tn - er ca meatier ene is ahaa ees natehere Mie ep iet tpn, Dye eye Aye! ee Cn heleAb a trad ean i me a ot THE POPULAR SCIENCE MONTHLY an LAA ie. Se 7 Bo cy RELL é. ye 7 a \ ‘ ' ‘ ‘ a @: J 7 eS, % mASY AK gt EDITED BY J. MCKEEN CATTELL VOLUME LXxl JULY TO DECEMBER, 1907 NEW YORK SERE\SCIEN CE PRESS 1907 Copyright, 1907 THE SCIENCE PRESS Press OF THe New ERA PRINTING COMPANY LANCASTER, PA. fis a) POE EA ee Cal BN’ COE DMO N PELE JULY, 1907 WHAT WE OWE TO AGASSIZ? By PROFESSOR BURT G. WILDER CORNELL UNIVERSITY HIS day, one hundred years ago, was born in Switzerland a man- child destined to astonish and uplift the world. Christened Jean Louis Rodolphe, he was and is known as Louis Agassiz, or simply Agassiz, his eminent son being distinguished as Alexander. Why is this centennial celebrated here and elsewhere? Rather, by such as know what Agassiz was, what he did, and what he tried to do, would it be asked, Why is not this day observed in all lands, by all classes, yea, even in behalf of animals, plants, the rocks and the very elements ? For, from a child, Agassiz loved nature and humanity. The one he strove to interpret, the other to cheer and enlighten. He was a naturalist in the broadest sense, a sense broader than is possible in these days. His thirst for knowledge was equaled only by his desire to impart it, and his ability to earn money was surpassed only by his determination to spend it for the welfare of man and the glory of God. More or less complete accounts of Agassiz have been published in various books and periodicals. A partial list of these is included. By far the best, although lacking many desirable details and restricted by the relationship, is the “ Life and Correspondence” by his wife. My admiration for this grows with each re-reading. In respect to both subject and style it might well be included among the entrance require- ments in English. It portrays an eminent scholar, indefatigable col- lector and teacher, sincere patriot, staunch friend and fascinating per- sonality in a manner so just, so vivid and inspiring that, were it prac- ticable, in place of the many spoken observances of this centenary, I * Address at the Centenary of Louis Agassiz delivered, at the request of President J. G. Schurman, in Barnes Hall, Cornell University, May 28, 1907. 6 _ POPULAR SCIENCE MONTHLY could wish that the coming Memorial Day might be partly devoted to its perusal—out-of-doors—by every man, woman and child.* In enumerating the grounds upon which this commemoration might be well-nigh cosmic in its scope, so far as possible I shall use the words of Agassiz himself or of others fitly representing the several groups. The following account of the “ Glacial Theory ” is condensed from the address* at the unveiling of the Agassiz tablet in our Memorial Chapel, June 17, 1885, by the geologist and paleontologist, Professor J.S. Newberry: “Tn 1837 the Association of Swiss Naturalists met at Neufchatel, and Agassiz then advanced the theory of a general glacial epoch of which he may justly be called the author. At first it met with violent opposition [Marcou says, p. 108, ‘it was like a pistol-shot fired into the midst of the assembly ’], but this only stimulated those who had adopted it to greater enthusiasm in their researches. . . . One of the motives which led Agassiz to America was his ardent desire to see for himself whether the glacial record was the same for the New as for the Old World. ... Many years before his death he had the satisfaction of knowing that his theory was applicable to the whole northern hemi- sphere, and the pleasure of studying a similar record in southern South America.” I wish there were time to quote from Mrs. Agassiz’s volume (pp. 317-332) the graphic, indeed thrilling, story of his life upon the glaciers. He once caused himself to be lowered into a crevasse to the depth of one hundred and twenty-five feet, when death would have at- tended either the fraying of the rope by sharp edges of ice or the dis- lodgement of the huge stalactites between which he had to steer his way. Agassiz was a well-informed botanist. His “ Lake Superior” and “A Journey in Brazil” deal largely with vegetation; two or three smaller papers are botanic, and one of the courses before the Lowell Institute was, he told me, upon trees and plants.* A member of the administrative staff of our College of Agriculture related to me the fol- lowing incident: During Agassiz’s stay here in 1868 he often walked about the then very open campus. She and her brother, little children, conceived a great admiration for him, called him “our French- man,” and used to offer him flowers. On one occasion she was about to pluck a red clover upon which a bumblebee had just alighted. * The only other comparable biography is the “ Life, Letters and Works ” by Marcou, and it will be quoted frequently. Its peculiarities are well stated in The Nation for May 7, 1896. In a letter to me, dated March 21, 1896, he ex- presses his regret at the inadvertent omission of “some of the best” from the enumeration of Agassiz’s pupils and assistants. ’ As printed in the “ Proceedings in memory of Louis Agassiz and in honor of Hiram Sibley,” pp. 11-12. *May this be that which was given in 1853 under the title, “ Natural History ”? WHAT WE OWE TO AGASSIZ 7 He restrained her, saying gently, “ Do not frighten it away; the bees are the friends of the flowers.” * Agassiz’s concern for the promotion of agriculture was evinced by word and deed upon many occasions.® In 1861 he supervised the draw- ings for the “ New Edition ” of Harris’s “ Insects injurious to vegeta- tion,” and “rendered assistance by way of suggestion and advice throughout ” the publication of the work that was the prototype of the later extensive reports and organizations, state and national, in the line of é€conomic entomology. The last chapter of “ A Journey in Brazil,” published in 1868, was more than half devoted to the agri- culture and forestry of that country. So deeply interested was Agassiz in the problems involved in the improvement of domesticated animals that, at the close of his exhaust- ing summer at Penikese, and only three months before his death, he wrote me a letter of 1,700-1,800 words devoted mainly to that subject. The following sentences are very suggestive: We naturalists can not afford the expense necessary for making the investi- gations and answering the questions about which farmers universally expect us to be prepared to give information. It would cost hundreds of thousands of dollars to study the embryology of the horse as I have studied that of the snapping-turtle. But turtle eggs can be had for the asking, while every egg and every embryo of the higher animals will cost the price of a mare or a cow, and so for other species. I do not know one scientific man in the world so placed that he could kill one hundred of these animals a year, for a number of succes- sive years in order to study their embryology; and yet until this is done we shall go on groping in the dark as far as any real improvements in the breeding of stock are concerned. It is probable that this topic occupied him in his last public effort, a lecture on “ The Structural Growth of Domesticated Animals ” before the Massachusetts State Board of Agriculture, only twelve days before his death. On the twenty-eighth of May, 1874, the birthday of Agassiz next following his death, there was held here a Memorial Meeting.” It was addressed, among others, by the Hon. John Stanton Gould, then our non-resident lecturer on agriculture, who had witnessed interviews be- tween Agassiz and farmers seeking information as to animals, crops and soils. He said “It was beautiful to see that illustrious man impart the needed facts in language perfectly adapted to the intellectual and scientific status of the inquirer.” *See, also, the relation of a botanist, Professor C. F. Millspaugh, Cornell Era, June, 1907, p. 443, and “ Proceedings of the Memorial Meeting of the Cam- bridge Historical Society,” May 27, 1907. *It is not easy to account for the omission of entries like agriculture and farmer from the indexes of the volumes by Marcou and Mrs. Agassiz. ‘It was for the purpose of raising a sum to be added to the “ Teachers and Pupils’ Fund” in support of a scholarship at the Museum. There was raised $100, of which about one fourth was given by President White. 8 POPULAR SCIENCE MONTHLY How clearly the situation was recognized by Agassiz himself is shown in the following paragraph from the preface to his “ Contribu- tions to the Natural History of the United States”: There is not here [as in Europe] a class of learned men, distinct from the other cultivated members of the community. On the contrary, so general is the desire for knowledge, that I expect to see my book read by operatives, by fisher- men, by farmers, quite as extensively as by the students in our colleges or by the learned professions, and it is but proper that I should endeavor to make myself understood by all. For the means of carrying on the regular work of the museum, and for such special projects as are referred to above, Agassiz depended largely upon grants from the state legislature as recommended by the board of education. Many of the legislators were farmers or from agricultural districts, so that his efforts to improve the quality of domes- ticated animals and to check the ravages of insects were both natural and politic. But it may well be doubted whether even the weighty facts and arguments at his disposal would have sufficed without the extraordinary influence of his personality and eloquence. This was alluded to by Oliver Wendell Holmes® in the sentence, “The hard-featured country representatives flocked about him as the fishes gathered to hear Saint Antony, as the birds flocked to hear the sermons of Saint Francis.” It has been more fully described by Thomas Wentworth Higginson and Charles Mellen Tyler.? With the latter’s permission I will quote it in advance, nearly verbatim: In 1861-2 I was in the Massachusetts Legislature and a member of the Committee on Education before which Professor Agassiz appeared to secure the annual appropriation for his museum. It was the year of the storming of Fort Sumter, of the attack upon a Massachusetts regiment passing through Balti- more, and of the first battle of Bull Run. Members of both houses of the Legis- lature foresaw a prolonged and bloody conflict, a great demand upon the Treas- ury, an increased and burdensome taxation to maintain the forces in the field. Our hearts were not high; we cut and slashed all bills of appropriation, and scrutinized with microscopic suspicion every bill of either house which looked to any increase of expenditure. Our committee anticipated the interview with Agassiz with some impatience and in a negative disposition of mind. We had, in fact, resolved beforehand not to recommend to the House and Senate the usual gift from the State. But when Agassiz appeared before us with his delightful accent and bland, persuasive, almost affectionate personal appeal to each of us, we wholly forgot the distress of the nation, the probable rejection of our recom- mendation by the two houses, and went over to Agassiz, horse, foot and dragoons, reported a bill for the usual outlay for his benefit, and to our surprise we carried it through. ® In the letter declining the invitation to attend the unveiling of the Agassiz tablet, p. 7 of the “ Proceedings ” mentioned above. °The former in the Boston Transcript for April 23, 1907, and the latter in the Harvard Graduates’ Magazine for June, 1907, p. 778. WHAT WE OWE TO AGASSIZ 9 Agassiz was born near Lake Neufchatel in the region known as the Seeland of Berne. His early home was literally surrounded by lakes, rivers and marshes. “ Almost as soon as he was able to move alone he took to water like a young duck. All the fishermen became at once very fond of the little fellow, and there was a friendly rivalry among them to get him into their boats and show him how to catch fish.’’?° This friendly relation with the takers of fish was maintained throughout his life. Wherever he went he visited the markets and ascertained who were the most enterprising and intelligent purveyors. From them he gained not merely specimens but information, and to them he imparted his own knowledge in appropriate terms. One of his closest friends was Captain N. E. Atwood, of Provincetown, Mass., whose personal knowledge of marine fish and fisheries was so highly estimated by Agassiz that, upon the latter’s suggestion, he was invited to give a course of lectures before the Lowell Institute. In 1853 he issued a circular asking for collections of fishes from various fresh-water systems of the United States. ... To this he had hundreds of an- swers, many of them very shrewd and observing... . / A great number and variety of collections . . . were forwarded. As to the marine forms, “many a New England captain, when he started on a cruise, had on board collecting cans,” fur- nished by Agassiz, to be filled... and returned.” (Mrs. Agassiz, pp. 518-519.) The participation of women in any memorial of Agassiz is most natural. His mother was his most intimate friend and his letters to her from America are simply delightful. At the museum his lectures were open to women as well as men. He had great sympathy with the desire of women for larger and more various fields of study and work, and a certain number, including the lbrarian, have always been em- ployed as assistants. For eight years (1855-63) he lectured almost daily in a school conducted by his wife; and upon her intellectual com- panionship and cooperation he became so dependent that he once de- clared to me, with signs of deep emotion, “ Without her I could not exist.” Never from his lips did I hear a word that might not have been spoken in her presence. In 1873, of the forty-four teachers admitted by him as pupils at the Penikese school, sixteen—more than one third—were women. Coedu- cation—then hotly debated and regarded by some as a bugbear—had not with him even the dignity of existence as a problem. He declared that he had “no hesitation from the start.” His attitude was certainly consistent; among the theses defended at his graduation in 1830 one was entitled Femina humana mari superior. Are some male members of this university concerned lest that phrase become the appropriate motto for the College of Arts and Sciences ? 10 Marcou, I., pp. 7-8. 1 QOne of these cans arrived at Penikese during the last summer of his life, and I well recall the interest, akin to that in a Christmas box, with which Agassiz and his assistants and pupils drew forth the contents. Lo POPULAR SCIENCE MONTHLY Before me are representatives of the African race, members of the university in full enjoyment of all its educational advantages. Fitly may they unite in honoring the memory of one who so effectively aided the establishment of this cosmopolitan institution. For, whatever may have been Agassiz’s technical views as to the diversity of origin of the so-called human races, and however he may have deprecated amal- gamation and the premature conferring of certain political privileges, his correspondence with Dr. Samuel G. Howe leaves no doubt as to his position upon the fundamental issue: The negroes should be equal to other men before the law. . . . They are en- titled to their freedom, to the regulation of their own destiny, to the enjoyment of their life, of their earnings, of their family circle. . . . It is one of our primary obligations to remove every obstacle that may retard their highest de- velopment. One of Agassiz’s two daughters married Quincy A.,brother to Robert Gould Shaw, commander of the “ Fifty-fourth,” the first of the two Massachusetts colored regiments in the Civil War. On the eighteenth of July, 1863, Colonel Shaw fell at Fort Wagner and was there buried with his dusky followers. So far from regretting the circumstances of his death or the nature of his last resting-place, the hero’s name has been repeated in the second generation. By none should the memory of Agassiz be cherished more devoutly than by the science teachers of America. I refer here not so much to the favored few? who enjoyed his direct instruction whose office is so finely drawn in these lines by James Russell Lowell: He was a Teacher; why be grieved for him Whose living word still stimulates the air? In endless file shall loving scholars come, The glow of his transmitted touch to share. From highest to lowest, every teacher of natural science in this country is indebted to Agassiz for improvements in methods, for eleva- tion of public respect, and for increase in compensation. Upon the point last named Agassiz had cause for entertaining de- cided views. For years his regular salary was only $1,500; indeed, not until the very end did a gift relieve him entirely from the necessity for outside labors which doubtless shortened his days. His last letter to me, dated November 25, 1873, contained the following significant sen- tence: “If scientific men are ever to be placed on a proper footing of independence in this country, it is for the younger to work for it. They have a fine opportunity of doing it by pointing out what the older men have done on a starving allowance.” On an earlier occasion he declared 2 Wor example, A. C. Apgar, of Trenton; W. O. Crosby, of Boston; W. K. Brooks, of the Johns Hopkins; David S. Jordan, of Stanford; C. 8. Minot and W. H. Niles, of Boston; T. B. Stowell, of Potsdam, N. Y.; C. O. Whitman, of Chicago, and A. E. Verrill, of Yale. WHAT WE OWE TO AGASSIZ II that thereafter he would not give a public lecture for less than $500, in order to let those who held the purse-strings appreciate the value of such services.1* While he did not hesitate to accept for the museum, at a low remuneration, or even with none, the services of young men who desired at the same time to learn from him or to enjoy opportuni- ties for research, my personal experience with him during four years and one summer warrants me in saying that in cases of a different sort he was liberal and even generous. At the middle of the last century American naturalists were few, scattered and little understood. Commonly their vocation was medi- cine, and their botanic and zoologic avocations were rather condoned than commended. ‘The prevailing notions are embodied in this anec- dote: A few years after his arrival in America Agassiz made one of a small party of Harvard professors who traversed the White Mountain region in a carriage driven by a countryman. ‘Three of them were vivacious, restless, and on the lookout for specimens. They would call a halt; leap from the vehicle before it stopped; dash over the fields, and return with prizes in their boxes, in their hands and pockets, and even pinned upon their hats. The fourth, Professor Felton, the brother- in-law of Agassiz, sat quietly in his corner reading a favorite Greek author. When the bewildered driver could stand it no longer he elicited from Felton information which led him to view the behavior of the others with compassionate toleration. His interpretation was thus con- veyed to the innkeeper at the close of the day: “I drove the queerest lot you ever saw. They chattered like monkeys. They wouldn’t keep still. They jumped the fences, tore about the fields, and came back with their hats covered with bugs. I asked their keeper what ailed them; he said they was naturals, and judgin’ from the way they acted I should say they was.” Before long, however, in and about Cambridge and wherever Agassiz remained for any time, he and those inspired by him made the pursuit of natural history not only familiar and reputable, but almost fashion- able. Yet when this university opened the collecting of specimens was so unusual that the following incident is related to me by Winfield Scott Merrill, who was here in 1868-9: While walking in the country I saw a boy holding a horse, and he told me it belonged to a “crazy Dutchman” over in the woods looking for birds’ nests."* In an article, “ Louis Agassiz, Teacher,’ his ideas and practise as to methods of teaching are considered by me at some length. On the present occasion I quote from E. L. Youmans, late editor of the Pop- ULAR SCIENCE MONTHLY: * This was said to Professor Wyman in my presence, November 17, 1866. “This was printed in the Cornell Era of the period, but by some it was regarded as a myth. aril UN 3 *In the June number of the Harvard Graduates’ Magazine. & as LaF “y’ an nen » 2 ® Oh 12 POPULAR SCIENCE MONTHLY Agassiz had a profound interest in popular education, but the soul of that interest was for improvement in its methods. In the matter of public instruction he was a revolutionist and a propagandist. He warred with current ideas and consecrated practises. He condemned in the most emphatic way the wretched lesson-learning routine that prevails in the schools. .. . He never wearied in the endeavor to propagate more rational opinions, and we can not doubt that the seed thus sown will yet ripen into most valuable fruit. He denounced our wordy and bookish education as baseless and unreal, and demanded such a change in our system of instruction as shall bring the pupils face to face with nature her- self, and call out the mind by direct exercise upon phenomena—the facts, laws, relations and realities of the world of experience. The abundance of this educational fruit is indicated by Liberty H. Bailey, an exponent alike of “ nature-study teaching ” and of “ science- teaching for science’ sake” Agassiz gave us the motto, “Study nature, not books.” He taught the study of nature by the natural method. . . . And, although his teaching may not have been nature-study, as we understand the term—being given from the investigator’s or the specialist’s view-point, and intended primarily for students and adults—the present nature-study movement undoubtedly is a proximate result of the forces that he set in motion. (‘‘ The Nature-study Idea,” pp. 5, 6, 8.) Summer schools and biologic stations are now so common at the seashore and by inland waters that those who attend them for instruc- tion or research do not always realize their origin with Agassiz, thirty- five years ago in the establishment of “ The Anderson School of Natural History at Penikese Island.” Its history is given in the report of the trustees, and various aspects of it have been presented in the publica- tions enumerated in my article, “ Agassiz at Penikese.”*® The first session was directed by Agassiz himself, in the last summer of his life; the second by his son. “ Although,” to quote Mrs. Agassiz (p. 772), “the Penikese school may be said to have died with its master, it lives anew in many a seaside laboratory organized upon the same plan.” Our proneness to forget the pioneers by whose ideas and labors we profit was noted by Agassiz himself in his Humboldt Address (pp. 5,26)": The fertilizing power of a great mind is truly wonderful; but as we travel farther from the source, it is hidden from us by the very abundance and pro- ductiveness it has caused. Particularly should this day be remembered by that apparently diminishing number of collegiate teachers who hold that the kingdom of scholarship cometh not with observation nor with the assumption of millinery. In this country Agassiz wore no decorative ribbon of any kind, although he possessed that of the Red Eagle of Prussia and that of the French Legion of Honor. Although impressive in aspect and dignified in manner, he was extremely simple and unpretending in his ways, and did not like to make an appearance different from that of ordinary people in his neighborhood. He was of a joyous disposition 1° American Naturalist, March, | 1898. WHAT WE OWE TO AGASSIZ 13 and upon occasion he could be merry as a child. But for his merri- ment time and place must be fitting; Dulce est desipere in loco. He upheld the dignity of scholarship, and regarded university property and university time as consecrated to the loftiest functions. Agassiz has not generally been thought of as a disciplinarian; yet a single incident would justify the celebration of this day by those who regard the saying, “ Boys will be boys,” as inapplicable beyond the secondary school. Early in the summer at Penikese three young men committed a breach of decorum which some might consider amusing. The next morning Agassiz simply announced that they had shown themselves undeserving and would leave the island before noon. To the public Agassiz was best known through his lectures before the Lowell Institute and elsewhere, and by the “ Methods of Study in Natural History.” But an enormous amount of technical work is represented by his European publications, by the four volumes of the * Contributions to the Natural History of the United States,” and by his papers of greater or less length upon many zoologic topics. Marcou enumerates 425 titles. Coues thinks’? the greatest practical boon he ever conferred upon working naturalists was his “ Nomenclator Zoologicus,” with its accompanying index—the veriest drudgery imaginable for an author, yet drudgery of a kind that no hack or mere compiler could have performed; and only those who have to keep it at their elbows can be sufficiently grateful for this instrument. But working zoologists, anatomists and chemists are indebted to Agassiz for another practical service which probably could not have been rendered so efficiently by any other human being, viz., the remis- sion, by act of congress, of the tax upon alcohol used for scientific purposes. Alcohol is consumed largely in chemical laboratories, and it was nearly the only museum preservative in use before the com- paratively recent introduction of formal. Representations to con- gress were made by Spencer F. Baird and others concerned, but it is doubtful if they would have succeeded without the exercise of Agassiz’s commingled powers of conviction and persuasion. No native scientist did more than Agassiz to establish and main- tain the intellectual independence of his adopted country.** Aside from his published works, his training of young men, his founding of the museum and his provision of means for employment and research that might otherwise have been sought abroad, upon at least two occasions he urged such cultivation of science in this country as should free American naturalists from the necessity of looking up to Europeans ac their leaders and guides. At the annual meeting of the Boston Society of Natural History, % Review of “ Marcou” in The Nation, May 7, 1896. % Unconsciously I have used here nearly the words of Oliver Wendell Holmes in his letter referred to above. 14 POPULAR SCIENCE MONTHLY May 17, 1848, “he made a most earnest and stirring appeal” in that direction. Three years later he made a declaration of sentiment and policy, emphatic, specific and self-sacrificing. This shall be given in his own words :7® Twenty years ago I was present at a meeting of the American Association for the Advancement of Science, held in Cincinnati, where specimens from all parts of the west were brought together to be seen by the scientific men of the east. ... When one of the members of the association moved that to make the best use of these collections they should be sent to Europe to be identified by paleontologists and zoologists of the old world, I opposed that motion as ear- nestly as I could, stating that it would be an acknowledgment of inferiority on the part of America from which we could never rise again. . . . My motion was carried, and yet I remained under the imputation, which was loudly expressed by some, that I had carried a big job; that my motion had been made in order that I might have the benefit of describing those specimens, and thus raise my reputation. I resolved then to myself, but never spoke of it before, that I would never describe an American fossil, and I have kept my resolve. The progress since then has been such that now an American student scouts the idea of send- ing a piece of work to a European ordeal. Agassiz came to America upon a scientific mission provided for by the King of Prussia. He found here unlimited material for re- search, the chance of earning by lecturing the means of repaying obligations incurred by his European publications, and a cordial wel- come alike from naturalists, from society and from the people at large. Changed political conditions rendered his return less desirable, and he accepted a professorship in the newly-established Lawrence Scientific School at Harvard University.2° Ten years later he declined a favorable and repeated offer of a chair in the Paris Museum of Natural History. When the Civil War broke out “no American cared more than he for the preservation of the Union and the institu- tions it represented.” Indeed, “he was naturalized in the darkest hour of the war, when the final disruption of the country was con- fidently prophesied by her enemies. By formally becoming a citizen of the United States he desired to attest his personal confidence in the stability of her constitution and the justice of her cause.’”*1 Although the subjects of Agassiz’s studies had commonly to be killed, he was not a sportsman. “His passion for Natural History never carried him so far as to shoot birds or animals for sport.” The ” From the report of the meeting of the joint committee on education of the Massachusetts Legislature as printed in the Boston Weekly Spectator for February 12, 1871. Among other obvious misprints Agassiz is made to say that his protest was made “twenty-four” years ago, which would be 1847, whereas the first Cincinnati meeting of the American Association for the Advancement of Science was in 1851. * His first wife died July 27, 1848, and in the spring of 1850 he married Miss Elizabeth Cabot Cary, of Boston, who became his “ guardian angel.” #1 Mrs. Agassiz, pp. 568, 570. WHAT WE OWE TO AGASSIZ 15 creatures needed were put to death, as were the mortally wounded soldiers by old Ambroise Paré, “ doucement et sans cholére.” An even more impressive exemplification of the apparently para- doxical character of Agassiz was his attitude toward theology. His wri- tings contain abundant evidence of his firm belief in the existence of a Creator, but he would not discuss dogmas and repelled as impertinent the too prevalent American fashion of asking what church a man attends. So while criticized as a bigot by some scientists he was de- nounced as an infidel by some theologians because he could not reconcile the facts of geology with the literal interpretations of Scripture. In this regard, with Lord John Russell in politics, Agassiz might have said he was “sure he was right because both parties found fault with him.” To the “ righteous overmuch ” who may hesitate to unite in this com- memoration of one who seemed to make light of Genesis and to pass over Adam as if he had never existed, is commended reflection upon the following incidents: On the eighth of August, 1873, commenting on the death of an assistant, he said, “ My time will come soon, and I am ready.” In four short months that time had come. On the first of May, 1868, to my remark that I could not under- stand why Providence and the community had allowed him to lack the means for the complete development of his plans, he replied, “I suppose it is all right; had I obtained all I wished it might have gratified my ambition too much.” At the opening of the Penikese School, July 8, 1873, Agassiz said: “JT think we have need of help; I ask you for a moment to pray for yourselves.” The incident was commented upon as follows by Henry Ward Beecher :?? It seems to us that this scene of Agassiz and his pupils with heads bowed in silent prayer for the blessing of the God of Nature to be given to that school then opened for the study of nature, is a spectacle for some great artist to spread out worthily upon canvas, and to be kept alive in the memory of mankind. What are coronations, royal pageants, the parade of armies, to a scene like this? It heralds the coming of the new heavens and the new earth—the golden age when nature and man shall be reconciled, and the conquests of truth shall super- sede the conquests of brute force. As an American, as a student and teacher of science, and as a mem- ber of Cornell University,?* I might, like hundreds of others, take some part in this commemoration. But there are special reasons why, when possible, I have complied with requests to speak or write of Agassiz, and why the invitation to give the present address was accepted with joy and with a sense of obligation, notwithstanding its preparation has seriously “In the Christian Union, July 15, 1873, p. 51. See also “ The Prayer of Agassiz,” by Whittier. 73 As delivered the address described what Agassiz did for Cornell Univer- sity, directly and indirectly; see the Cornell Era for June, 1907, pp. 441-446. 16 POPULAR SCIENCE MONTHLY interfered with prior plans for purely scientific work. I am one of the few survivors of those who were directly associated with Agassiz as pupils, assistants or colleagues. He inspired me with interest, with admiration, with respect, nay, almost veneration. No shadow ever came between us. Whatever benefits he may have conferred upon others, I have reason to believe that, outside his family circle, there is no one, living or dead, who has such cause for gratitude and affection in return for counsel, for encouragement, for opportunity, and even for material aid in the form of specimens or information. The following statements are based not only upon my vivid recol- lections but upon my diaries and upon the letters of Agassiz, all of which have been preserved. I am unwilling to speak of myself on this occasion, and yet I do not know how else I can do justice to one of the most beautiful sides of his character. His sympathy for all young students of nature was one of the noblest traits of his life. It may truly be said that toward the close of his career there was hardly one such in this country who was not under some obligation to him.* As of yesterday I recall the first interview, now half a century ago. At the age of fifteen (in the middle of the last century a considerably less mature epoch than at present) some observations of mine upon spiders were brought to the notice of Agassiz by one of his assistants, James E. Mills, and led to an invitation to visit him. In my “ Ento- mological Diary” he is described as a “ very pleasant, fine-looking gen- tleman.” Now I should write, “ The most fascinating and magnificent of men.”*> At once I appreciated the saying current in Cambridge that in winter one needed an overcoat less while passing his house. His commendation of the spider essay led my parents to grant my request to prepare for the profession of naturalist. That preparation comprised (1) Two more years of Latin and Greek to complete the Harvard entrance requirements in those languages; (2) additions to the collection of insects that formed the nucleus of the collection at Cornell; (3) reading the first two volumes, just issued, of Agassiz’s “ Contributions to the Natural History of the United States ” (Turtles, and Essay on Classification). This was done before breakfast, and such was my conviction of its value that, although the text was largely unintelligible at that stage of my progress, I felt fortified for the ordinary tasks of the day somewhat as is the religious neophyte by his matutinal fasting and prayer. The experience is related as a warning rather than as an example, but it illustrates the influence unconsciously exerted by Agassiz upon those whom he had welcomed to the scientific fold. That influence was similarly illustrated while attending his lectures * Slightly altered from Agassiz’s address on Humboldt, p. 44. *In a letter dated Charleston, 8. C., March 12, 1853 (printed in the Cen- tury Magazine for December, 1903, p. 188), Thackeray describes Agassiz as a “delightful, bonhommious person, as frank and unpretending as he is learned and illustrious.” WHAT WE OWE TO AGASSIZ 17 at Cambridge in my first year. No topic was so vital as the general problem of animal life, and no expositor could compare with Agassiz. As an outlet for my enthusiasm each discourse was repeated, to the best of my ability, for the benefit of my companion”® on the daily four-mile walk between Cambridge and our Brookline home. So sure was I that all the statements were correct and all the conclusions sound that any doubts or criticisms upon the part of my acute and unprejudiced friend shocked me as a reprehensible compound of heresy and Jése majesté. From the fall of 1866 until, mainly upon his recommendation, my connection with Cornell University, I was employed in making prepara- tions to illustrate the structure of sharks and rays for his projected volume upon those fishes.*7 This work brought me into relations with him, more and more close, instructive and delightful. From my diaries and letters are selected a few incidents exemplifying phases of his nature not generally appreciated. Speaking of Darwin, whose doctrines he vehemently opposed, he remarked: “‘ Much as we disagree, we are truly friends.” With some earlier assistants there had been a serious disagreement ending in temporary estrangement ;?* yet when their names were men- tioned before him he made no adverse comment. He once showed me a letter from one of them asking permission to examine certain speci- mens at the museum. Upon my remarking that the presence of that man might not be very pleasant for him he replied, almost with reproof, “Tt is true that I have built up this museum, but I am only its trustee, and if the devil himself wished to study here he should be welcome.” His tenderness is shown in the following incident. The artist who was drawing the plates for the volume upon sharks and rays above mentioned was an elderly German who, uncertain of the term of his employment, had left his family in St. Louis. At last, in his loneliness, he sent for one of his children, a lad of ten. Supplied with credentials of various kinds, the boy reached Cambridge and inquired for “ Herr Professor.” It was after dark and Agassiz sorely needed rest after a long day at the museum. Yet, instead of summoning a servant, he took the child by the hand, walked with him several squares, and deliv- ered him safe to the anxious father. The summer of 1867 I spent literally at his side in the laboratory adjoining his summer home at Nahant. Together we dissected the sharks and rays that were brought in by the fishermen. To the para- phrase, “ No naturalist is a hero to his laboratory assistant,” he was 7° James Herbert Morse, Harvard, ’63. 7 See his report as director of the Museum of Comparative Zoology for 1867, p. 10. * The full merits of the case may never be understood, and this is not the place for its discussion; but in the light of my own experience with him, on the one hand, and with my pupils and assistants, on the other, I incline toward his view of it. VOL. LXxI.—2 18 POPULAR SCIENCE MONTHLY an exception. For me that summer was a scientific idyl. That the pleasures of my memory of it are less than perfect is due to my later realization of how inadequately I appreciated my privileges and oppor- tunities. Three specifications in the general charge of my unworthi- ness will serve to set his own tact and delicacy in a clearer light. A fisherman brought a hammer-head shark. Although familiar with pictures of its rather strange form, I had never seen a specimen, and expressed my interest somewhat exuberantly. The man named a certain price, and Agassiz paid it. When he had gone, Agassiz said to me seriously, but with no shade of rebuke: “ This shark is not so very rare, but your outspoken surprise led the. man to ask about twice what it was really worth.” After that I would have held my peace in the presence of the “ sea-serpent.” Agassiz was paying me one dollar per hour, an arrangement con- venient for both, especially in the summer. I wished to learn stenog- raphy, and studied that early in the day, going to him about nine o’clock. One hot July morning I found him grieving over the rapid deteriora- tion of some specimens that had been brought in at daybreak. I ex- plained the cause of my delay, and added that, but for the necessity of earning my living, I would gladly work for him all the time and for nothing, in return for what I learned from him. “ Ah,” he said, “I hoped you felt so, but I was not sure. Now we are like lovers after the important word has been spoken.” Not for all the short-hand systems ever devised would I lose the memory of those words and of the look that accompanied them. In those days (it was forty years ago) it might fairly be said that about the brain, zoologists knew little and cared less. No one of my teachers had made a special study of either its structure or its func- tions.*® That summer, however, Agassiz studied the brains of sharks and rays, exposing them by “ whittling” the cartilaginous skulls with a jack-knife given him by Longfellow (who, by the way, made a visit to the laboratory). He compared the various forms with the only pub- lished plate we had (that of Dumeril), and would sit poring over them by the hour. Occasionally he would show them to me, and ask if I would not like to work at them. (Remember that he was paying me out of his own pocket and was entitled to assign all the subjects.) No, I had started upon some other parts of the anatomy, and was indifferent. That is too mild a term; I must have been a com- pound of a mole and a mule. He sighed and gave it up. That I then made the mistake of my life I did not perceive until years after- ward, too late to repair the loss. Now, by way of atonement, I in- * In 1844 and 1845 Agassiz published two short papers upon the brains of fishes; in “ A Journey in Brazil,” p. 244, note, he deplores the loss, in a storm, of a lot of brain preparations in a cask that had been left on deck. In the last but one of the twenty lectures given at Cornell University, he said, “ The brain is the organ that determines the rank of animals.” WHAT WE OWE TO AGASSIZ 19 sist that the objective study of the brain should begin in the primary school,*° and I look forward—however undeservedly—to the period when no other subject need claim my attention. At times, however, I speculate as to what part of the nether world is paved with ignored advice and neglected opportunities. His helpful attitude toward prospective teachers was exhibited in the following incidents. After my appointment to Cornell University in October, 1867, he arranged for me to give at the Museum a course of six “ University Lectures,” and warned me to prepare for them care- fully because he should give me a “raking down.” He attended them all (at what interruption of his own work I realize better now) and discussed them and my methods very frankly with me. A year later, while at Ithaca, he attended several of my lectures upon physiology, although they broke up his forenoons and the subject did not interest him particularly. After one he expressed his approval of its simplicity and the absence of hifalutin,** and advised me to counteract the effect of lecturing by investigation. Another lecture dealt with the structure and functions of the heart, for the illustration of which we had excellent charts and models although not, at that time, any actual specimens. I believed that I had done very well, and accompanied him down the hill toward his hotel in the hope that he would say something complimentary. All he said was, “ After lec- turing upon a subject I have found it a good plan to go to work and study it some more.” Then he began to talk of the glacial scratches upon a big rock that we passed. The justice of his criticism was equal to the delicacy of its conveyance. The work done by me here in 1871-3 upon the brains and embryos of domesticated animals has been referred to already as one of the indirect benefits conferred by Agassiz upon this university. His satis- faction with the results evidently led him to make a most honorable overture and invitation. On the seventeenth of November, 1872, he wrote a letter beginning: “I wish I could have you permanently in Cambridge as professor in connection with the Museum and the Uni- versity. The first thing to know is whether such a plan would suit you and under what conditions you could accept a proposition, etc.” The matter was discussed at more length in letters dated December 7, 1872, and September 10, 1873. It has never been mentioned before by me, but there seems to be no longer reason for reticence. The second letter contained also the invitation to be one of the instructors at the summer school already mentioned on p. 12. He * Upon this point see my papers in Science, December 17, 1897, p. 903, and May 26, 1905, p. 814. “This, the only approach to slang that I recall from his lips, doubtless referred to my introduction of a somewhat far-fetched quotation from Shake- speare in an address before the Harvard Natural History Society, reproduced in the American Naturalist, Vol. L., p. 421; it was my first and last transgres- sion of the kind. 20 POPULAR SCIENCE MONTHLY wrote: “Among my plans is a course of practical instruction in Natural History at the seashore, during the summer months, chiefly with the view of preparing teachers to introduce Natural History into our schools. . . .” In the two cases just mentioned it may be said that the advantage was mutual although mine much more than his. But in the following instance his words and deeds can bear no other interpretation than disinterested willingness to aid another at his own inconvenience. In preparing for a course of lectures before the Lowell Institute I wished to dissect the limbs of certain rare animals which we could neither collect nor afford to buy. On making my wants known to him he promptly took a knife, went with me to the museum store-rooms, and with his own hands cut an arm and a leg from each of several precious specimens. In thanking him I said J had reason to believe that the invitation to give the course was due largely to his having taken the trouble to commend me to the curator; and that I wished he would let me make return by doing some work for him without com- pensation. He replied, emphatically, “I could not think of it; it is my business to help young men.” In Agassiz were combined five qualities, not uncommon singly or even by twos and threes, but rarely so completely united or so highly developed in one personality, viz., attractiveness, eloquence, strength, energy and helpfulness. As distinguished from Napoleon, from Bis- marck, from Goethe, and even from Washington and Abraham Lincoln, Agassiz was at once fascinating, persuasive, powerful, active and up- lifting. Under my personal observation have come but two others comparable with him in this most potent combination of great qualities, viz., Henry Ward Beecher and Phillips Brooks. They were preachers; so was he. They based their ministrations upon what they regarded as the Word of God; he drew his texts from what, with equal faith, he held to be the works of a Divine Creator. They were also alike in this; never was voice or hand raised otherwise than for the better- ment of mankind. On returning from Penikese in the fall of 1873 I went to the mu- seum to arrange some specimens, when he came in and reproached me for not letting him know I was there. I explained that I knew he was tired and ill and that I would not take his time. He replied, “ Doctor, you are always kind,” and those last words have been trea- sured as a benediction. This coming fifth of September it will be thirty-four years since I beheld my teacher, friend and benefactor in the flesh, but in my mind’s eye his image will never fade. Take him for all in all I ne’er shall look upon his like again. Would that it might be justly said of all great men, as I now say of Agassiz: The sun shone brighter at his birth, and shadowed when he died. THE DEVELOPMENT OF TELEPHONE SERVICE 21 NOTES ON THE DEVELOPMENT OF TELEPHONE SERVICE By FRED DELAND PITTSBURGH, PA. X. Earty AERIAL TELEPHONE CABLES ROBABLY John I. Sabin was the first telephone man to use an aerial cable. In connecting his line in San Francisco in 1879, he did not run his circuits into a cupola, as was then the fashion, but employed several lengths of a special cable made by Eugene F. Phillips, of Providence. This cable was composed of forty No. 20 soft drawn copper wires, double braided with cotton, then double wrapped in reverse order with rubber paper, the whole being wound with a cotton or jute covering. It cost 20 cents a foot at the factory. It was sus- pended by using long canvas slings about two feet apart and attached to two heavy iron wires. In referring to the growth in overhead circuits, Mr. Phillips stated that: The natural increase in the number of aerial wires created a demand for better insulation and grouping in cables. Hundreds of miles of No. 12 iron wire were braided and dipped in suitable compound for this use. The annoyance from induction soon made a call for anti-induction cable. This want was supplied by a tin-foil cable so called, in which each conductor, after being insulated, was enclosed in a strip of this tin-foil. Cotton-covered wires to the extent of 50 or 100 were cabled together, and after being saturated with paraffine were placed in a lead pipe. This style of aerial cable, although quite satisfactory, has to a great extent been replaced by the paper-insulation underground cable of the present day. Aerial cables were in use in New York City late in 1879, and before the close of 1880 a total of over 75,000 feet was in use in the city and on the Brooklyn Bridge, principally of ten-conductor capacity. In September, 1880, C. E. Chinnock told the delegates to the first tele- phone convention: We have over the East River bridge at the present time, four cables, 3,800 feet long, each cable with seven conductors, These cables have taken the place of cables that were previously there with the ordinary kerite and gutta-percha insulation. In using the cables and talking on one wire, you could hear what- ever was said on another wire, and by wrapping each conductor with lead and grounding at intervals, all of the escape and all induction were completely eliminated. These cables have been in use, two of them for six months, and one for nine months, and are now working perfectly. In May, 1880, W. D. Sargent used a lead-covered aerial cable to connect two exchanges in Philadelphia. This cable was made by David Brooks, Jr., son of the inventor of the Brooks cable. It was 22 POPULAR SCIENCE MONTHLY composed of 42 twisted pairs of No. 18 cotton-covered wires, which were wrapped together and drawn into a lead pipe one inch in diameter. Then a mixture of melted paraffine and rosin was poured into the pipe, the whole forming a solid mass on cooling. This cable was about 600 feet in length and was suspended from three heavy iron wires by loops made of No. 14 iron wire. At one of the telephone conventions C. N. Fay stated that the use of cables for telephone purposes in Chicago began in 1879, when a 50- wire Brooks oil-pipe cable, 925 feet long, was placed in the Washington Street tunnel under the bed of the Chicago River. The conductors were made of No. 20 copper wire, insulated with cotton, and drawn through an iron gas-pipe pre- viously polished smooth on the inside. The ends of the pipe were elevated, and upon each end was placed a reservoir capable of holding three or four gallons of paraffine oil. After the pipe was put in place, the cable was drawn through. Paraffine oil was then poured into the reservoirs until the pipe was filled from end to end and both reservoirs were full, when the caps were screwed on and the whole made tight. There was a loss of oil from evaporation and leakage through the pipe, requiring a refilling about once in six months. In 1880, a 75-pair cable of similar construction, 450 feet long, was placed in the LaSalle Street tunnel under the Chicago River; another one being placed in the spring of 1881. In 1884, all the oil-pipe cables were in good and satisfactory working condition. ... The first aerial cable was put up in Chicago in September, 1852, and was a 50-pair Patterson cable 1,350 feet long. Six Brooks oil-pipe cables were in use early in 1880 in Milwaukee. Each cable was about five hundred feet in length and composed of fifty single conductors, and all were considered “ very satisfactory.” It is of historical interest to note that in April, 1843, S. F. B. Morse detailed to the Secretary of the Treasury the specifications under which forty miles of a four-conductor lead-covered cable would be made. Each wire was to be once covered with cotton thread, to receive two coatings of shellac varnish; then wound with a different colored twine to designate, in case of necessity, any par- ticular wire in any part of the course. The four lengths are then laid side by side and bound together in a single cord by another winding of cotton twine. The conductors thus prepared are ready to be introduced into the lead pipe. XI. Forctinc TELEPHONE WIRES UNDERGROUND When the underground question first came up, the leading telephone companies made it clear to the authorities of the respective municipali- ties, that any hesitancy in removing overhead wires and placing them underground was not due to an unwillingness to make the additional and very large investment necessary, but to contending with obstacles that then appeared insurmountable. There was no practical under- ground system suitable for telephone distribution in American cities. Several experimental systems were being. promoted, but all appeared to possess little practical value. One promoter laid a half-mile of his pipe underground and then invited a large number of telephone, tele- THE DEVELOPMENT OF TELEPHONE SERVICE 23 graph and electric-light men to thoroughly inspect the condition of pipes and wires. Following this inspection came a banquet of nine courses, at which eight different wines were served to more than a hun- dred guests. Referring to proposed drastic legislative action to force the wires underground, David Brooks wrote on March 13, 1882: I have every reason to believe that the great quantity of poles and wires that are now so objectionable in our streets may be dispensed with in the future, and while the company is so earnestly engaged in testing this problem of under- ground wires, I can see no good result to be obtained by the passage of these bills. It will be to their interest to make an underground system whenever it is practicable. The attitude of the parent Bell company on the underground ques- tion is shown in President Forbes’ annual report dated March 18, 1882, in which he states that our experiments in underground cables, while not as successful as we had hoped, have given sufficient promise of satisfactory results to warrant us in under- taking at considerable expense to test the different methods. With this object, we have asked permission to put down cables in Boston, and, as soon as the needed consent is obtained, we propose to make careful and thorough practical tests of the best systems offered. . . . The cost of replacing an extensive over- head system in a large city is so serious that it can not be hastily decided upon; yet, if the wires can be laid underground and made to work rightly, at a cost which will not be prohibitory, it is hoped that the service will be better than now, and the cost of operating less than by overhead wires. The first Morse telegraph patent of June 20, 1840, refers to the wires being laid underground, and a portion of his first telegraph line was buried, but proved inoperative, while on a section built with the aid of cattle-horns used to support the line on and insulate it from a stone viaduct, good service was secured. But the first American patent for underground lines was issued in 1869, and it was the only one issued until 1873, when two more were issued. A total of twenty-one patents were issued prior to 1880, when, in that year, seventeen were issued, and twenty-eight in 1881. Aerial as well as underground con- duits, evidently based on the old Graves method of 1858, or the Carter of 1875, were also suggested as a remedy for the multiplicity of over- head wires, and elaborate systems supported upon iron posts or columns erected either on one side of a street or overarching the roadway and supporting the wires in the center were made, upon paper, to appear very attractive, and earnestly advocated as a practical public improve- ment. In fact, the opinion was expressed at the third telephone con- vention held at Saratoga Springs, that with a light and ornamental aerial cable support the requirements of the public could be satistied and the introduction of subterranean wires obviated entirely or confined wholly to important trunk routes. ... The Scott elevated wire-way system consists of cupolas located upon housetops, separated at any convenient distance and connected by a suitable tube, through which wires to the number of two or three hundred are drawn and properly connected at the cupolas. The 24 POPULAR SCIENCE MONTHLY tube is preferably made of rubber and braided fabric upon a spiral foundation of wire, by which the tube retains its circular form. The tube is suspended from a supporting wire of sufficient strength to stand the strain of severe wind and the weight of accumulated ice and snow. The wires, which may be either well insulated or even the ordinary braided or double-wound wire, can be drawn in singly or in groups and connections made at the cupolas. The tube, being impervious to moisture, the channel inside will remain perfectly dry. Since the last report of the committee, it has been introduced on a limited scale in the city of Boston and it will soon be extended. While no underground system satisfactory to telephone men was available in 1880-3, a few wires had been laid underground and some experience of an expensive character gained. For instance, the Western Union carried out some costly experiments with underground wires in New York City during the four years, 1876-80. In 1876, two 4-inch iron pipes were laid from the main office to Pier 18, a distance of one third of a mile. In each pipe was placed a cable of sixty conductors, the wires insulated with gutta-percha, and wound separately with a layer of tarred tape, the whole covered with a double layer of heavy tape tarred and run through sand to prevent sticking to the pipes. These cables were connected to the submarine cables running to Jersey City. In 1876, a 12-conductor cable about 2,200 feet in length was laid between the main office, 195 Broadway, and the branch office on Broad Street. Owing to the proximity of steam pipes and the de- structive effect of gas on the insulation, these cables were short-lived. In 1880, a new 28-conductor cable was laid between the same offices. Before the end of 1882, eleven of the conductors were useless. In May, 1882, sixty circuits were laid between 195 Broadway and 134 Pearl Street, only to be abandoned within a year, every circuit having failed within seven months. On November 28, 1888, it was stated that the result of the Western Union experiments during the past twelve years proves that there is no form of under- ground cable and conduit which can be depended upon to give more than four or five years’ service under the most favorable circumstances. In 1878, John P. Barrett, superintendent of the city telegraph system, placed the fire-alarm and police signal wires underground for a distance of 840 feet on a handsome residence street in Chicago. Two-inch iron pipe, the interior of which was heavily coated with tar, was laid underground and into this pipe two kerite insulated wires were drawn. ‘Ten years later it was stated that these wires had given no trouble and were in ‘ practically as good a condition to-day as when so placed.’ Submarine telegraph cables were in use thirty years before the first telephone exchange was opened. Referring to the first one used in this country, Henry A. Reed said: This cable was of No. 9 iron wire, insulated to the thickness of half an inch and was made in 1847 by Stephen Armstrong in Brooklyn, N. Y. It was laid THE DEVELOPMENT OF TELEPHONE SERVICE ~— 25 across the North River at about Fort Lee. It only worked a few days when it was dragged out of place by a ship’s anchor. The first iron-armored cable was made by S. C. Bishop in 1852, and was used across the North River, above Cold Spring. This cable was of No. 14 copper wire with an insulation the size of No. 0, protected by jute and armored with iron wire about No. 8. Submarine telephone cables were used in 1879 by several companies in crossing rivers and bays, notably in Chicago and Milwaukee, and Patterson telephone cables were placed in the Washington Street tunnel crossing under the Chicago River, in 1879, as previously stated. But probably the first telephone cables that formed a part of a regular underground system were laid in Pittsburg in 1881, by Henry Metzger. Three lead-covered cables were laid on Fifth Avenue between the ex- change and a distributing pole, about a thousand feet distant. The cables were composed of 50 single conductors of No. 26 copper wire, and were placed in a wooden box, 6 x 8 inches, made of one-inch plank, that was then filled with asphalt and laid inside the curb below the frost line. No manholes were used, but connecting wires were spliced with a T-joint. In June, 1882, Mr. Metzger laid eight more Patterson cables underground, the longest being 2,200 feet in length, composed of No. 18 B. & S. single copper wires. These cables gave good service for a number of years. That same year, 1882, the New England Tele- phone and Telegraph Company laid two Patterson 50-pair cables in Boston, for’ metallic circuit service. The lead-covered cables were drawn in iron pipes laid in cement. One cable was 1,200 feet and the other 1,485 feet in length; both were composed of No. 22 wire, cotton covered. One was laid in Pearl Street in October, the other in Franklin Street in November, 1882. On May 20, 1882, Professor Chas. R. Cross, in considering the various electrical problems involved in the introduction of underground telephone cables wrote: In the first place it should be remembered that the number of wires in for- eign cities is probably not more than one fifth as great as in American cities of equal size. Thus in Bruges, Belgium, a city of 50,000 inhabitants, there is but one telegraph office, that at the railway station; in Ghent, with 120,000 inhabit- ants, there is but one telegraph office; in Antwerp, with its enormous commerce, there are but two, one being at the railway station; and in Brussels proper, only one office except at the railroad stations. In London and Paris almost all messages are sent from the outlying offices to the central telegraph office by means of pneumatic tubes, and the telegraphic despatches sent from there. From these facts it will be seen that the absolute number of underground wires in foreign cities is much less than is popularly supposed. Contrast in this respect Boston and suburbs, with 377,000 inhabitants and forty-nine telegraph offices, and Brussels and suburbs with 315,000 inhabit- ants, and eight or at most ten offices. In April, 1882, thirty-eight sections of a lead-encased telephone cable were laid underground between the two tracks of the Boston & Providence Railroad extending from the depot in Attleboro to West 26 POPULAR SCIENCE MONTHLY Mansfield, a distance of about five miles. The cable was made by Eugene F. Phillips in sections of five hundred and thirty feet, and con- nected by means of junction boxes, and he gave the readers of the Electrical World (March 4, 1899), an interesting account of the man- ner in which the cable was laid. In part, Mr. Phillips said: In 1882 the American Bell Telephone Company, wishing to make some prac- tical experiments on telephonic transmission with underground wires, ordered of us a cable to be 5 miles in length, containing twenty-one wires of No. 20 B. & S. gauge, a majority of which were to be insulated with rubber and the balance braided with cotton and paraffined; part of the conductors to be covered with tinfoil, and part twisted in pairs for metallic circuit; also a single con- ductor of No. 13 B. & S. gauge braided and paraffined. We believe this was the first underground experiment made for the American Bell Telephone Com- pany, and the laying of this cable was a red letter day for us. The American Bell sent an engine and one open-end freight box car, which carried the 5 miles of cable we had already made to Attleboro, as well as fifty men for a working force. In laying this cable a trench was started by means of pick and shovel, but it was soon found the hard roadbed was by no means easy digging. A plow was borrowed of one of the farmers and attached to the outrigger from the truck of a car, pulled by an engine. As we were unable to hire oxen or horses to plow with, this idea was suggested by W. H. Sawyer, and it made a fine specimen of plowing, the like of which was probably never before witnessed. When the trench was completed, two plows had actually been consumed in the process. The cable was placed at the end of the car and paid out into the trench as the car moved along, and close behind the plow in the furrow. The filling of the trench was also another great conundrum; the gang started with shovels and hoes to do this, but it at once became evident that it would be a week’s work with the force at command. Again Sawyer’s inventive genius came to the rescue. At his suggestion a joist was procured, and one end lashed to the cowcatcher of the engine, the other end extending out over the trench on the side where the dirt had been thrown. The engine was started, and the entire length of the trench and cable was soon covered, much to the pleasure and satisfaction of those looking on as well as those responsible for the filling. Notwithstanding that prior to 1890 no underground system proved satisfactory from a telephone engineer’s point of view, yet the rapidity with which the telephone companies responded to the public demand that the wires be placed underground is apparent from the fact that while the underground movement started in 1881, at the close of 1884 there were 1,225 miles of wire underground, and ten years after the first telephone cables were placed underground, over 70,000 miles of wires were in subterranean ducts. To-day over one half of the total mileage of telephone circuits in use by Bell subscribers is underground, that is, nearly three million miles of copper wire are buried in the earth. XII. Tue Errecr oF Evecrric Street LIGHTING ON TELEPHONE SERVICE While an inability to dispose of the securities of the local com- panies retarded the growth in subscribers in many exchanges, in 1883-5, other causes were also hindering the expansion of the telephone in- THE DEVELOPMENT OF TELEPHONE SERVICE 27 dustry. One cause was the rapid introduction of electric-light circuits, so poorly insulated as to sadly interfere with good telephone service and necessitating the rearrangement or reconstruction of many tele- phone circuits. As already stated, the first street lighting occurred in Cleveland in April, 1879, with Brush arc lamps. In San Francisco the Western Electric Light Company was organized by G. S. Ladd, and on February 6, 1879, was supplying current for private service accord- ing to The Bulletin, which said: Yesterday the Western Electric Light Company made connection with the Gold & Stock Telegraph Company, and now all the electricity used in running their stock indicators throughout the city is supplied from the Gramme machines, thus doing away with five hundred cups, which heretofore composed their battery. It is stated that arc lamps were in service in San Francisco in October, 1879, the rate then charged being $10 a week when burning from dark till midnight. It was fortunate for the continued broadening of the telephone industry that it got a strong foothold before the parent electric-light companies began to devote their energies to belittling each others machinery and motives, or to determine whether it was wiser “to advocate the use of sixteen small single light are machines, with their costly system of conductors, or one sixteen-light are dynamo,” in- stead of perfecting the insulation on pole line circuits, even if they did not increase the efficiency of their apparatus. Otherwise the elec- tric transmission of speech might have had a different growth recorded. For the character of the crude and cheap telephone construction preva- lent in 1878-80 would not have been tolerated by the public in 1882-3, by reason of the number of violent deaths resulting from accidental contact with live wires, deplorable accidents that started a rabid agita- tion in favor of placing all wires underground. No underground system suitable for telephone circuits was then in existence, and had one been available, the heavy initial cost of installation would probably have deterred many investors from entering the telephone field under such unpromising conditions. In New York state alone more than a hundred electric-lighting companies, having an average authorized capitalization exceeding a million dollars each, were incorporated before the close of 1883. And as the electric lighting industry was raw and untried, as suitable or even satisfactory line insulation had yet to be devised and tested, and as competition among electric-light companies in many sections was destructively fierce, it is needless to say that the unsafe con- struction of the average competing electric-light company was such a menace to the satisfactory continuity of telephone service that telephone managers were compelled to forego making verbal or writ- ten indignant protests, and to devote every moment of time to de vising methods and means for protecting their equipment from the 28 POPULAR SCIENCE MONTHLY destructive effects of stray currents. Even then, imperfect protection resulted in the complete or partial destruction of several telephone exchanges. Following the destruction of one exchange, Mr. A. 8. Hib- bard suggested that in view of the delay in getting large switchboards in emergencies, it would be a wise thing in the way of insurance, if a number of telephone companies would jointly buy a complete central office equipment, to be built and held in convenient storage, with the understanding that it should go to the first company whose exchange was burned, and that.that company would pay its cost price or replace it with new equipment. Referring to the introduction of electric-light circuits, Mr. W. J. Denver told the members of the Boston Electric Club: I remember the first time the are lights were exhibited in my native city, and what a tumult was caused at the telephone office. An electric light circuit was strung, using the ground for a return and four or five lights were placed upon it. Immediately on the starting of the dynamo, up went the lights and down went the switchboard drops, and the confusion of tongues consequent upon the building of the tower of Babel was as the stillness of death compared to the racket on the telephone wires. . . . The remedy was evident; double the light circuit, which was done the next day. When the electric-light industry started, the electric lighting fra- ternity turned to the telegraphers for assistance and advice, just as the telephone men did. But the electric-light men also had the advantage of the experience gained by telephone men in building local circuits. It is written that the first electric-light switching devices were derived from the telegraph switch, only enlarged to accommodate the greater volume of current. The strap key, the telegraph key and the switch- board plug were all utilized in central-station electric lighting, and the arc that formed between the terminals following the withdrawal of the plugs was usually blown out with the breath, or whipped out with a cloth, or extinguished with a handful of sand. In other words, the same degree of crudeness was just as strongly in evidence in primitive electric-light plants as in the pioneer telephone exchanges. And, as one writer stated it in 1882, there are electric-light charlatans as well as medical quacks, charlatans totally ignorant of the electrical laws, and with no experience in electric lighting. One point worthy of note is that the telephone engineer soon found that he must not only be able to solve telephone problems, but must also be thoroughly conversant with every phase of electric lighting, and then of electric power and of electric traction that was in any manner likely to have a bearing on or to influence the character of tele- phone service. Thus, as the editor of The Electrical World has so concisely stated: In the telephonic engineering done by Carty and his colleagues there is no par- allel whatsoever to be found in any other branch of electrical engineering. RAVAR 4. oo*“PHEY GREAT JAPANESE VOLCANO ASO 29 ie to) Sa oe ae g OA g.. aU RNS ae ox t &- i oo Me et at ‘oa beg * ‘inne GREAT JAPANESE VOLCANO ASO By ROBERT ANDERSON WASHINGTON, D. C. SO-SAN, or Mount Aso, is a living volcano in the heart of the island Kiushiu, Japan, whose peaks rise to a height of several thousand feet out of a gigantic bowl. This bowl, which is many miles across, is an ancient crater surpassing in size all other known craters nearer than the moon. Some 5,000 people, grouped in half a hundred villages on the old floor, are living to-day, tilling the vol- canic soil and trading in this vast crater, round about the base of the new and ever-active cone that has risen in it. Kiushiu is the most southern of the four main islands in the Japanese archipelago. It is about 17,000 square miles in extent and is therefore larger than Vancouver Island, or almost equal in area to Massachusetts and New Hampshire combined. It is built up of very ancient rocks, both sedimentary and igneous, belonging to the paleozoic and mesozoic eras, as well as of younger rocks, and upon these as a foundation has been erected in more recent times, partly during the age of man, a superstructure of volcanic materials which now covers many thousand square miles, or about one half the area of the island. It contains twenty volcanoes, counting two that are just off the coast to the south, of which eight are now active. Among them Aso-san is on far the largest scale, though now it is in a decadent stage and is surpassed in activity by two or more of the others. Japan through all past ages has been a land of extraordinary geological activity, possessed of a vital energy which, continuing in force up to modern times, has been emphasized by the changes in level of its coasts and heralded by its ever-vigorous volcanoes. It is far from being a land solely of volcanoes and volcanic formations, as is some- times thought, for these assume insignificance when compared with the wide areas and great thicknesses of strata that are representative of almost every stage of the geological column. But that it is a country of great volcanoes there can be no doubt. They have flourished ever since the beginning of its geological history and to-day there are 164 independent volcanic cones, or colonies of related cones, scattered through the Japanese islands, including the Kuriles and the Liu Kiu chains. Of this number 54 are now actively grumbling and nursing their wrath and occasionally losing all control. Fuji-san and Aso-san are the kings, although others surpass them in destructive activity. The first is famed for the height and regularity of its cone as one among the preeminently symmetrical and beautiful volcanoes of the 30 POPULAR SCIENCE MONTHLY world. The other is almost unknown except among the Japanese, although its immense crater is the largest of all that have yet been found on this globe. The center of Kiushiu is about 600 miles distant from Yokohama and Tokio by the ordinary routes of travel, and by far the best way to reach Aso-san is from Nagasaki, whence one of two routes may be followed—either far around from the peninsula on which Nagasaki is situated, a distance of 150 miles by railroad to Kumamoto, a city on the west coast of Kiushiu, within 25 miles of the voleano, or most of the way by sea, a distance of 75 miles to the same city. The pilgrim or traveler who mounts to the walls of the castle of Kumamoto and looks eastward over the green and gardened city and over the rich plain bordering the bay of Shimabara, off to the moun- tains that form the backbone of the island, sees the massive, sacred, god-mountain Aso above a long blue chain. A thrill passes through him as he sees a white cloud streamer waft horizontally across the grey clouds around the summit or, rolling into a ball, float upward lke a thistle-down. The white cloud is soon dissipated, but another born from the mountain takes its place as soon, and one knows that here is a volcano, that the god of the mountain is alive. Hundreds of Japanese visit Aso-san every year to pay their homage to the deity that the mountain represents, but only rarely has it been visited by foreigners.* During the spring of 1905 the writer and his brother, Malcolm Anderson, and their friend, Kiyoshi Kanai, spent several weeks in the vicinity of Aso-san, staying for many days in one of the villages in ‘the old crater, living in native Japanese fashion and coming in touch with the spirit of the people and the natural history of the region. The way from the west coast to the mountain lies across the Kumamoto plain among little open fields that in the spring are richly colored with deep green wheat and yellow mustard, along a broad avenue eighty feet wide marshaled by stately cryptomeria trees whose handsome bark and foliage remind one of their big cousins—the California redwoods. Beyond the village of Seta at the edge of the lowland, some 13 miles from Kumamoto, one is led up into the mountains by a gentle ascent, the volcano itself being all this time hidden by the intervening slopes. But a backward view reveals the lesser volcano Kimbo-san rising as an independent cone near the sea, and if the day affords one of the clear Japanese skies, which unfortunately are only too rare but which are so beautiful when they come, one sees the The only mention of Aso and its crater that the writer knows of is in an article by the geologist, John Milne, in The Popular Science Review, New Series, Vol. IV., No. 16, October, 1880, and in Murray’s ‘Handbook for Japan,’ by Chamberlain and Mason.- The former is an English periodical that has long since ceased publication. THE GREAT JAPANESE VOLCANO ASO 31 great destructive volcano Unzen-dake springing up to nearly 5,000 feet on the peninsula of Shimabara over across the gulf. One travels to Aso-san as one chooses, either on foot, in a jinrikisha, or in the funny little perambulating dry-goods box known as a basha, the Japa- nese adaptation of the English stagecoach. We preferred to walk, and upon leaving the plain we enjoyed many picturesque miles up the cascading stream Shirakawa. For the first night out from Kumamoto we stopped at a modest little inn, being driven by a pouring rain to take shelter at the hamlet of Tateno, which is perched high up on the side of the canyon that the road follows, at an elevation of about 1,200 feet above the sea. From there on the canyon of the Shirakawa becomes more precipitous in outline, and a short tramp in the early morning along the mountain slopes above it brought us to its brink at a point where it forked and cut squarely across our path. Here, pillared walls formed of roughly columnar lava, through which the stream has cut a grand gorge, drop sheer several hundred feet, and the path descends a zigzag course to their foot, where the two forks toss into one stream over a boulder-strewn bed. Near here a hot saline spring surrounded by the hamlet of Tochinoki, where many bathers come, give the first evidence of the proximity of the volcanic center. Whichever of the two forking streams one follows, one presently comes up upon a broad plain that is surrounded by heights on every side and that curves around in the form of a great crescent. But, instead of ordinary mountains, the outer convex curve of the crescent is ringed about with an even-topped wall rising on the average about 1,500 feet, while the concave side is bordered by a great rugged moun- tain mass attaining a height of over 4,000 feet above the plain. The configuration of the region is absolutely unique and one is at a loss to understand its significance until later on, climbing the mountains and gaining expansive views over the whole broad domain of Aso. The truth is this: That a vast oval crater basin occupies the region, but is divided in two by a range of mountains that has risen across its center diametrically. The two portions of the crater thus cut off are the two crescent-shaped plains, whose level bottoms are formed by the old crater floor, whose outer surrounding walls are its rim, while the inner side of each is walled in by the great dividing range. There is but one opening in the ramparts hemming in these basins. It is where the western end of the central range meets the bounding wall. Each of the two halves of the crater is drained by a stream, and these small rivers uniting around the base of the central range at this western end, flow through the common outlet—the grand gateway through which we made our entrance. It is 10 miles across the crater from west to east in the diameter occupied by the dividing mountain ridge, while from wall to wall from south to north it is 14 miles. These figures, it must be stated, are only estimates, but a 32 POPULAR SCIENCE MONTHLY number have agreed that they are approximately correct. The oval area occupied by this volcanic bowl is thus over 100 square miles, an area half as large again as the District of Columbia. The crater of Aso is both for size and structure unique among the craters of the world. The Hawaiian volcanoes, with which Aso shows the most resemblance, are of greater bulk, but their craters, which are usually spoken of as the largest in the world, can not compare in size with that of Aso. The crater of Haleakala, according to Dana, is %14 by 214 miles in dimensions, and covers some 16 square miles. It has a greatest depth of 2,500 feet. The Kilauea crater, Dutton gives as 314 miles long by 214 miles wide and from 300 to 700 feet deep. The crater of Mauna Loa was measured by Alexander as 314 by 184 miles in dimensions, with an area of 344 square miles. The islands of Santorin south of Greece in the Mediterranean preserve the remains of a crater 18 miles in circumference, and Pantellaria, between Sicily and Africa, one with dimensions of 8 miles by 6. The two Italian crater lakes, Bolsena and Bracciano, are of great size; the one is oval with a long diameter of 9 and a short diameter of 714 miles, and the other is a circle 6 miles wide. The crater of the volcano Palandoékan in Armenia is said by Bonney to be 6 miles in width. Among the volcanoes of the Canary Islands, Scrope mentions the cirque of Teneriffe, which contains a pit 2,000 feet deep and a high peak within it, as being 8 miles long by 6 miles wide, and Bonney the crater on the island of Palma as 9 miles in diameter. A crater on Mauritius is said by Dana to have a longest diameter of 13 miles. Among the great volcanoes of Java, according to Scrope, Papandyang has a crater with measurements of 15 by 6 miles, and Bromo one with diameter of 4 or 5 miles. Crater Lake in Oregon, described by Diller, is one of the most perfect. This nearly round pit is 4 or 5 by 6 miles in dimensions and has a depth of 4,000 feet. But Aso surpasses them all, with a crater equaling 2 or 3 times the combined volumes of the three great Hawaiian craters mentioned. The journey over the old floor in the midst of such novel surround- ings is a unique and pleasing one, but the stupendousness of the scene comes over one more strongly when he looks down upon it later from above. Our little party chose the southern of the two forks and fol- lowed it up for mile after mile along its gentle upper course. The distances proved elusive. We looked across the plain to the wall on the other side and it was only a little way, but still as we went the goal seemed no nearer. The ascent from the point of outlet of the streams is at first rather steep. Within about a mile, however, the fork that we followed bursts off the level of the crater floor in a picturesque waterfall. It is called by the Japanese Aigaeri, or “trout-return,” for beyond this the fish can ascend the stream no farther. The view upward to the mountains surrounding the plain on all sides is mag- THE GREAT JAPANESE VOLCANO ASO 33 UNCEMENTED MASONRY WALLS, Fic.1. THE CASTLE AT KUMAMOTO WITH ITS STRONG, The BUILT THREE CENTURIES AGO. This style of construction requires a slope to the walls. author and his brother ran a race to their top and found it quite possible to scale them. The superstructure of the castle was almost destroyed during the Satsuma rebellion in 1877. The view of Aso from the single remaining turret is magnificent. ASO RANGE. Fic. 2. Hor SPRINGS AT YUNATANI NEAR THE WESTERN END OF THE There is a small geyser here that spouts out boiling water and red mud. VOL, LXXI.—3 34 POPULAR SCIENCE MONTHLY Fic. 3. PANORAMIC VIEW OF THE HIGHEST PORTION OF THE RANGE IN THE CENTER OF the highest peak of Aso-san. On the right is Neko-dake. Photo by Malcolm Anderson. nificent as one journeys on over the gently rolling surface of the basin floor. To the southwest the ring wall, elsewhere comparatively level-topped, rises up into mountain peaks that are between 2,500 and 3,000 feet higher than the level of the plain. ‘To the north and north- east run the mountains that form the barrier between the two halves of the crater. They make up one massive, rugged ridge whose sum- mit is broken by several dominating peaks. It is this range or ridge that is named Aso-san. On the summit, but at the foot of the highest peaks, at a point about half way from end to end of the Aso ridge, is situated the modern active crater from which rose the cloud that we saw from Kumamoto. A view of the rising steam puffs is again obtained as one comes out into the widening plain above the waterfall. And as one goes farther and finally reaches the central and widest portion the view of the Aso range, which was at first an endwise one and eastward, opens out until one looks to the north upon it broad- side. There are three main peaks and many minor ones, the most striking of them being Neko-dake at the farther, eastern end. Its slopes have the graceful curving outlines characteristic of volcanic cones, and its summit is a jagged battlement of monumental lava pin- nacles looking somewhat as if they might be the remnants of a shat- tered crater. Its eastern flank drops down and ends the range by blending with the converging outer walls of the two basins. The next nearest peak is Taka-dake, a higher although less distinctive summit forming the culmination of the range. It is separated from THE GREAT JAPANESE VOLCANO ASO 35 THE CRATER, looking north across the southern half of the crater. 1n the center is Taka-dake Neko-dake by a depression of about 2,500 feet, out of which both mountains rise steeply. The ridge almost loses its continuity in this depression, so that Neko-dake is left as an isolated pyramid with truncated broken summit rising about 2,500 feet out of the highest part of the old crater to an elevation of 4,800 above the level of the sea. Taka-dake on the west side of the gap has an altitude of 5,600 feet above the sea, and is about 4,000 feet above the crater floor around its base, and some 4,500 feet higher than the point where the two streams have their outlet. On the southwest flank of Taka-dake rises the half-dome summit of a third peak, Naka-dake, facing the southern basin with vertical cliffs of black rock that have the appearance of being the cross section of a lava flow. It is from a low point of the range west of this summit that the steam cloud issues from the small modern crater, whose cone is hidden from the southern basin by an outstretched flank of Naka-dake. West of the new crater is another low place which divides the highest portion of Aso from the continua- tion westward. This gap is about equidistant from the two ends of the range. West of it rise subordinate peaks along the ridge, which gradually sinks lower until it comes to an end near the outlet of the streams. The distance from west to east across the big crater of Aso along the line occupied by the central range is about ten miles. But following the curving course of the crescent basin it is much farther from one side to the other. By the road through the middle of the plain the distance is about eighteen miles. Our little party after 36 POPULAR SCIENCE MONTHLY passing through many hamlets and villages between long rows of small houses that line this main thoroughfare, at last, at a distance of twelve or thirteen miles from the stream outlet, reached Takamori which we had chosen as our goal. This is a prosperous small town with several hundred inhabitants, the chief center for the rich agricultural district hemmed within the volcanic heights of this southern half of the old crater. This whole district is one wide expanse of cultivated fields, a mosaic of little patches differently planted, unfenced and unbounded, stretching freely down the plain in endless kaleidoscopic variety. In the spring- Fic. 4. LOOKING SOUTHWEST ACROSS THE FLOOR OF THE SOUTHERN HALF OF THE ASO CRATER AT A MUCH WORN PORTION OF THE SURROUNDING WALL. The town of Takamori shows as a spot of white in the distance on the left. bhoto by Malcolm Anderson. time wheat and mustard, growing tall and vigorously, are the domina- ting crops, and the rich green of the grain mingled with the brilliant vellow of the mustard blossoms spreads a gay succession of tints over the wide plain. Here and there a tree, or a cluster or line of trees, for the most part dark pines cr phantom bamboo groves, give a picturesque irregularity to the vast chess-board, standing like players on the light squares or the dark. The villages and groups of farm- homesteads with their conically roofed thatches appear as small as ant- hill colonies when viewed from above from one of the innumerable points of vantage round about, so small are they as compared with the breadth and depth and largeness of the scene of which they are a part. THE GRHAT JAPANESE VOLCANO_ ASO 37 On a day in April that dawned cloudless and with a frosty chill the writer set out to reach the summit of Neko-dake, the ragged-topped mountain at the eastern end of the Aso chain. As I went among the little fields and along the hedgerows in the early morning, always choosing among many paths one that seemed to lead me eastward, for beyond Takamori no well-beaten road continues farther up the plain, I met several people setting out also for the day. Each one of them looked with wonder at me, a stranger, staring with curiosity but bowing courteously in reply to a morning’s greeting. One was a man with his faded bluish-grey kimono tucked up above his knees, leaving dis- played a considerable expanse of underwear, his calves swaddled in blue- canvas walking gaiters above the straw sandals on his feet, and his shoulders wrapped in a bright red blanket—a man with the worn brown countenance of a country traveler shaded by a sun-darkened straw hat. He was a type of wayfarer often seen in the out-of-the-way portions of Japan, who, touched by an expanding arc of the great wave of western- ization, has adopted a Iudicrous cross between the native and foreign dress, a cross that possesses all the characteristics of degeneracy from both of the parent stocks. The next man that passed carried on his shoulder a short wooden steel-bound mattock or hoe, such as the peasants use in cultivating the fields, and another led a bull stout of neck and sullen of countenance Jaden with a rough plow and other tools for the day’s work. These men were coming from their homes out to the particular little patches belonging to them somewhere in the plain. It is customary for the peasants to group their houses in small colonies and sometimes they go long distances to their work. Still another man, who came along the path empty-handed and empty-faced and out of work, was evidently quite resigned to the enforced leisure promising for that day. As I went farther and the day grew the fields became peopled here and there with men and women in small groups heartily beginning their task of digging and planting and nursing the ground. This is their daily occupation and so they live on peacefully, pay- ing no heed to the filmy cloud floating over the crest of the Aso ridge, which now disperses before the spring sun only to return, in one form or another as a misty veil over the mountain top, a dark smoke, or a silvery cumulus cloud standing bright on the blue sky. There is no thought of the living force of the volcano. The crater floor slopes upward from the outlet toward the east, and Takamori is several hundred feet higher than the level of the floor near the break in the walls where the streams flow out. It rises still more beyond Takamori and breaks from a fairly even plain into undulating hillocks which occupy the angle where the outer wall curving in con- verges with the Aso range. In this angle I reached the base of Neko- dake and the foot of the wall at the same time. The ascent was up a grass-grown ridge having an even slope of thirty degrees, but becoming 38 POPULAR SCIENCE MONTHLY narrow and ragged as it approached the rocky mountain top. At an elevation of 4,750 feet by my barometer, just under the brow of the summit, I caught a glimpse on approaching of what I took to be a lonely wild cherry tree in blossom far up here alone. It proved to be a group of bushes with their bare limbs and twigs bearing little balls of snow, remnants of the winter. From the mountain top a magnificent view opened and led me for the first time to a comprehension of the structure of the region. I had come from a deep basin on the south of the Aso range and here sud- denly was spread out on the north its almost exact counterpart. At about 3,000 feet below the peak on which I stood lay this other far- reaching plain which seemed to be the continuation of the southern one, while round its outer edge it was enclosed by a similar curving wall. The grandeur of the scale upon which all the lines in the scene were drawn made the outlook a most impressive one, and with the view came a sense of the magnitude of the forces that had been at work in molding the large details of such a landscape. The sight was such that it carried with it at once the appreciation of these two huge bowls as parts of a great crater, divided by a high, massive mountain partition. This crater is almost circular in appearance. Its rim forms a smooth sweeping curve around the whole circumference, broken only at the cleft on the west where the streams pass out, and on the east where it is joined by the slope of Neko-dake. The summit of this outer wall is remarkably even and its inner side precipitous. Although it presents rocky precipices at points on its face, its general slope is by no means perpendicular, but, being steeper as a rule than ordinary mountain slopes, it has a strikingly abrupt appearance. ‘This is espe- cially true in the case of the northern basin, where the wall facing the south is less gashed by lines of erosion, is more sheer, and has a more perfectly preserved even summit than the wall of the southern bowl. The latter wall is furrowed by gulches that have eaten back to the sum- mit in places and notched the sky-line of the rim. Between these gulches sharp ridges run out into the plain, some of them looking more like lava flows descending from the wall than like remnants left by erosion. Such ridges run out into the northern basin as well, and little island-like hills rise in isolated positions from the crater floor. This half, though a close counterpart of the other, is more nearly round and its walls preserve a more even height. The slope up from the floor in both basins is gentle at first at the foot of the walls and then becomes steep. The walls are formed of roughly bedded lava flows interstrati- fied and intermingled with mixtures of vesicular lava, scoria, pumice and volcanic sand. The harder lava layers project with vertical rocky faces, while between them softer zones have weathered away into débris slopes and produced a rough terraced effect, somewhat similar to that in the sides of the Grand Canyon of the Colorado. The height of the THE GREAT JAPANESE VOLCANO ASO 39 walls above the level of the plain is on the average about 1,500 feet. It decreases toward the western side owing to the gradual rise of the floor in that direction, but increases at some points, as on the south- west and west sides, where mountains break the continuity of the hori- zon line. From the brink of the wall around the whole circumference of the big crater, a wide plateau slopes gently away at an angle of only some five to eight degrees. One is apt to think of a crater as a pit on the apex of a sharp conical mountain. The crater of Aso has a cone, but its slopes are so moderate that one realizes only from a point of comprehensive outlook that this vast open bowl lies on the summit of a huge mound, which forms an upland of low relief in the center of ‘Koushiu. The outward-sloping surface of this mound, as seen from above, is like a plateau, but it is without a single level place. No surface could be more wrinkled and still preserve the appearance of an inclined plane. It is completely made up of knolls and ridges and knobs, which continue off for many miles to the base of high encircling mountains. From the summit of Neko-dake these distant mountains are seen to surround this upland, much as the walls of the big crater surround its floor. The hillocks of the upland are overgrown in the early spring with long dry grass, but the cultivated bottoms between shine like emeralds, the green of the wheat being deepened here and there by the background of black soil upon which it grows. From the peaks of the Aso range that divide the two well-populated plains long flowing ridges with concave slopes reach down into the floor. Between them are steep gorges. These ridges are not dwelt upon nor cultivated, probably on account of the lack of water, but like the hills of the outer plateau are grown over with rank grass. They contrast strongly with the richly tinted sweep of the crater bottoms. Consider- able patches of the northern plain are sometimes flooded, and there is a legend that the big bowl of Aso was once occupied by a lake until a god kicked the hole in the wall to let the water out and leave the ground for cultivation. One can not but admire the conception of the ease and despatch with which this early piece of reclamation work was carried out. Nearly all that has been described, and more, can be seen from the top of Neko-dake; so much, in fact, that two or three hours spent on the summit was all too short a time. The descent was quick down the steep slope, but the evening homeward jaunt to Takamori was one of many miles. The way led along a muddy black path; at first among bare fields, where peasant women had been at work all day gathering up corn stalks, loading them on oxen, and sending them home to be chopped up to feed the animals; and then among the endless paddy- fields of wheat and mustard. Finally ‘home,’ when reached, consisted 40 POPULAR. SCIENCE MONTHLY Fic. 5, THE MODERN MUD-CONE OF ASO-SAN WITH VAPORS ISSUING FROM THE NEW CRATER. In the foreground is a temple to the God Aso. of a floor, a few bowls of rice, and a bath through which a dozen men had been before. On another day the three of us set out for the modern crater. A walk of a few miles brought us to the village of Yoshida about opposite the central portion of the Aso range, whence a feasible way seemed to offer up to the low place in the range already noted. It led first over the end of a number of low ridges that radiate into the plain from the central mountains and then up an easy grassy slope to the top. Here we had expected a divide that would enable us to look over into the northern basin, but instead we found an expanse of almost level mound- strewn country mostly enclosed by the higher portions of the summit THE GREAT JAPANESE VOLCANO ASO 41 and so wide that it intercepted all view. The mounds covering this upland were seemingly formed of soft voleanic débris and presented a straggling appearance. This summit country sloped upward on the east within less than a mile into a low cone some few hundred feet high, from which the steam clouds poured forth. Behind it on the southeast rose the forbidding-looking crags of Nakadake and on the east the flanks of Taka-dake to a much greater altitude. At the foot of the cone on the desert-looking slope stood several huts and two small temples, one Buddhist and the other Shinto, built in honor of the god of Aso for the use of those who climb the moun- tain to worship. It is one of the beautiful features of the Japanese religion as practised by a great many of the people that it draws them out of doors and brings them in touch with nature. Almost every mountain is held in reverence, and many days during the course of the year are spent by the devout in excursions in the country or up into the mountains to pray on the high places. It is a gentle ascent of only 200 or 300 feet from the rest house and the temples to the summit of the cone, first over a lava stream that looks as if it might have flowed but a little while before, then over a talus of lava, pumice and cinders, and finally over slippery, grey volcanic mud. At the top is the crater, a black, ragged, awful pit, roaring and steaming constantly. As one stands on the brink one looks down walls of roughly-stratified mud to a depth of 300 or +400 feet, where two round vents are continually rolling out masses of steam Fig 6. LOOKING DOWN INTO THE MODERN CRATER OF .4SO-SAN, showing the 10ugh layers of mud in the walls and the bottom of one of the vents. Photo by Malcolm Anderson. “9YVP-OFIN JO J1vd St Ia] 9G} UO puB ‘punoisa10j 94} VAOGL 409} 00OP ‘PAVp-VYABL Sf 1o}We0 oq} UL “JIULEINS OY} UO 19}V1IO MAM 94} WOTF SOSTT pnoyd 10dva ywois VY “AONVY ONIGIAT( AHL OL tiO UALVYD OSV CIO FHL AO ATVA NUAHLUON AHL 40 UOOTT THL NO WvaULg THL Wodd LSVAHLAOS ONIMOO'T “LOTS POPULAR SCIENCE MONTALY 42 THE GREAT JAPANESE VOLCANO ASO 43 and sulphur vapor and reverberating with explosive roars. This little crater has an oblong shape and is at a rough estimate 900 feet across and 2,000 feet long. Its rim is very uneven, being much higher on the north and east than on the other sides. It is divided into five compartments or vents, each separated from the other by a wall of mud, 100 feet or more high. The two already mentioned are the deepest and the only active ones, and occasionally, when the vapor column diminishes, one can look to the bottom of the northern vent and see the burning sulphur that plasters the lower walls and floor. The bottom is a round flat dise of cracked mud looking like the dried bottom of a pond, and there is no appearance of a hole or conduit descending to greater depths. The other of the two active crater holes is deeper and pours forth more steam. Its bottom can not be seen from any point upon the rim. ‘The yellow sulphur fumes fill the air and become almost unbearable at times when the wind shifts the cloud a little towards one. We were able to follow the edge the whole way round the crater, a distance of about one and one half miles, but the going was difficult on account of the extremely slippery mud that forms the outer sides, which slope sharply away from the precipice on the interior. This soft, fine mud, both outside and inside the crater, is furrowed by rain and given a curious appearance. The other three vents, besides the two already mentioned, lie to the south along the axis of the crater. They are steep-walled, but not so deep as the other ones. ‘They have flat bottoms of cracked mud, though in one the floor at the time of our visit was occupied by a shallow pool of water. The view from points near the edge of the crater embraces a large -part of the northern basin through a gap in the encircling heights on the north. But on all the other sides the rolling summit region is pretty well enclosed and looks a little as if it might have been at one time ages ago the site of a crateral basin much larger than the present active one. At length the late hour and our extreme thirst after a warm day without water on these dry mountains drove us down from the heights. At the rest house by the temples we obtained a reviving drink of cold spring water, and on the bench where we sat to drink it we left all the change in our possession, which was a total of ten coins, amounting to nine tenths of a cent. During the memory of man the crater on top of the Aso range has been active, and successive severe eruptions have again and again blown out ashes, cinders and bombs that have darkened the sky for many miles around and covered up the fields, have sent streams of mud mingled with hot water flooding down the mountain sides and over the plain, and caused terrifying noises and shakings of the ground. At such times crops and trees have been blighted and killed by the falling ash or by the heat and vapors, and the streams have been so 44 POPULAR SCIENCE MONTHLY filled with débris and poisoned with bitter sulphurous water that the fish have died. Some say that the Shirakawa, which means ‘ white river, owes its name to the milky color that it has been known to assume at such times. Loss of life has been occasioned by these out- bursts, but the records do not make it clear to what extent. Reference is made in records to fiery rocks sometimes of great size that have been blown out, but lava flows do not seem to have assumed importance. Explosive eruptions of fine débris, as shown by the mud cone, have been predominant during the later history of the voleano. Fig. 8. RECENT-LOOKING LAVA WITH SMOOTH FLOW STRUCTURE THAT HAS FLOWED DOWN A GULLY HIGH UP ON THE SOUTH SIDE OF NAKA-DAKE. In the distance, far across the great crater of Aso, may be faintly seen the horizon line of the outer wall. The whole foreground is covered with barren volcanic rock. The greatest eruptions of very recent times were in the winter of 1873 to 1874, when unusual activity continued during several months and ashes covered the ground to a distance of 18 miles; in the winter of 1884, when ashes were blown over Kumamoto, making it so dark there at a distance of 25 miles that lamps had to be used for three days; in 1889, during the year of the Kumamoto earthquake, which was the year following the great explosions of Bandai-san in central Japan; and lastly in 1894, when the floor of the modern crater was somewhat altered. The problem of old Mount Aso is a deep one. One can not view its gigantic outlines without wondering what forces could have molded them, what could have been the steps in the process of formation of this huge pit, its level floor, its steep walls, the gentle slopes radiating THE GREAT JAPANESE VOLCANO ASO 45 from its outer rim, and of the rugged mountain bulwark in its center, on the swmmit of which the life of the volcano has been preserved in a far smaller inner crater. It seems inconceivable that processes alone of building-up could have resulted in such forms as those of Aso; and in attempting to outline its history one always reverts to some theory of destructive action on a very large scale. The large crater of Aso may have been formed in either one of two ways, by the blowing off and away in some cataclysmic explosion, or series of explosions, the whole mass that must once have filled and overlain the present cavity, or by the sinking in of this same mass and its engulfment in a great void produced by the removal of the material that formerly gave support to the earth’s surface at this point. A calculation, such as given below, of the mass displaced in either case affords an impressive sense of the magnitude of the task that was accomplished. The roughly-bedded strata in the walls of the big crater seem to dip away on all sides at a low angle, and their slope is probably reflected in the gently inclined surface of the outer plateau that forms the sides of the Aso cone. From the regularity of these slopes it seems likely that they represent the truncated base of an old conical mountain that continued upward with the present slope to a culmi- nating point high above the center of what is now the crater bowl. It is probable that if such a mountain existed its upper portion rose with a gradually increasing slope into a peak, but even with a constant slope such as now exhibited in the base, its height would have been 7,000 to 7,500 feet above the sea, or about 6,000 feet higher than the present crater floor. It is probable that during the early history of the volcano such a cone was built up by successive eruptions of lava and fragmental material that formed sheets one upon another down the sides and became roughly stratified in conformity with the slope of the moun- tain; and that before the close of the period of greatest activity of the - volcano this cone was beheaded by some disruptive force. Not only was the summit removed, but the very heart of the volcano was opened, leaving a vast bowl on the site of the old eminence surrounded by the truncated lava flows of the outer circle of the mountain’s base. Still later, the processes of building up recommencing, a new mountain was constructed, this time not over a single center as seems to have been the case before, but along the line of the short diameter of the former oval mountain, and in this way the present chain of peaks was raised. But the voleano was gradually dying down, and reconstruc- tion on a grand scale ceased long before the new Aso had reached the dimensions of the old, or even effectually obscured, except to casual observation, the nature of its basal wreck. The volume of the bowl of Aso, not subtracting the space that is taken up by the supposedly subsequent range, is at least nine cubic 46 POPULAR SCIENCE MONTHLY Fig. 9. ONE OF THE MOsT ACTIVE VOLCANOES OF JAPAN, KIRISHIMA-YAMA IN SOUTHERN From its summit, which is 6,000 feet high, may be seen Aso-san 70 miles away to the north. miles. The mass that must once have overlain it, measured as the cone formed by the upward projection of the outer slopes, was at least 28 cubic miles in volume. Thus there must have been removed no less than 37 cubic miles, or about five and a half millions of millions of cubic feet of volcanic rock, a mass equal to over two and a half moun- tains like Vesuvius. Furthermore the likelihood that the cone steepened toward its sum- mit makes it possible that the old mountain was of greater size than estimated. If we conceive of such a vast block of the earth’s surface being blown up by some terrific explosion within the volcano, it is natural to suppose that great irregular deposits of the erupted material would be in evidence round the outside of the pit. There are immense areas of voleanic débris that have settled after being blown into the air, whole hills in places, within a radius of many miles of Aso. But these de- posits seem to be regularly bedded and not to exhibit the rough and tumble structure that would probably result from their being tumultu- ously cast up by such a great explosion, and they do not form a rim around the crater rising above the old slopes of the cone. And further the walls of the pit seem to be too regular to have been ex- plosively broken. More acceptable appears the theory that the Aso crater is a sunken pit. A voleano of such magnitude must certainly have been under- lain at some unknown depth by a large body of molten rock, the source of the lava that built up the cone. With all the weight exerted upon it by the overlying rocks and the pressure of steam from within, this fluid or viscous, intensely-heated mass must have sought violently for THE GREAT JAPANESE VOLCANO ASO 47 KIUSHIU, AS SEEN FROM A DISTANCE. It has been in violent eruption during the last decade. escape. Having, probably, found one or more points of discharge far below the summit of the cone, it flowed out in such vast quantities that it left a cavity large enough to engulf the whole of the un- supported mountain mass. The sinking was doubtless aided, and lessened in violence, by the partial fusion of the overlying rocks as they became more and more depressed, and probably the action took place around a common center. When the mountain summit had completely disappeared, there was left around about a regular curve of unbroken walls bearing witness to the comparative gentleness with which the action had been carried out. It is possible to consider the central Aso range as part of the old mountain that did not sink or become totally engulfed, but it seems more likely that it is a later growth. The completed work probably left the whole of the sunken mountain melted in a level lake within the great caldron. The radiating lava flows described in a later paragraph may help to account for the material removed. After nearly two weeks spent in and about Aso we left it, setting out eastward to continue our march across Kiushiu to the Pacific, on the opposite side of the island from our starting point. The less precipitous portions of the crater wall are well-watered and clothed with beautiful groves of pines and cryptomerias, bamboos, oaks and chestnut trees, among. which one finds little meadows and mossy places and banks overgrown with rich grass, where thrive an abundance of wild violets of various colors and sweet-smelling daphnes. Through these woods our road wound up out of the pit at a comparatively low and gently-rising portion of the wall, and finally over the crest of the rim to the far-sloping outer reaches. Within a few days more we 48 POPULAR SCIENCE MONTHLY looked back at Aso from the top of Sobo-san, the highest mountain in the island, and appreciated more than ever the roundness of the crater and its great size, which can be better grasped from such a dis- tance than from nearer at hand. The square, high block of Taka-dake and the turreted peak of Neko-dake stood impressively out of the huge bowl. Some miles to the south and east of Aso-san the surface covering of voleanic ejectamenta which has filled up and blotted out the ancient features of the landscape ceases to be a solid sheet, but lava streams continue for great distances beyond, partly burying the old river channels that radiate away from the region occupied by Aso-san. Aso has evidently been the center of all the volcanic activity of this por- tion of Kiushiu, and the source of supply of the erupted material mantling the region. The longest of the lava arms follows the Gokase river for a distance of over 30 miles beyond the edge of the volcanic sheet as far as the sea, or a total distance of 50 miles from the volcano. It must have started as a broad stream or as successive streams of lava from Aso and have become narrowed into the old canyon of this river. The width of the present lava filling of the canyon is on the average 21% to 3 miles, and the depth amounts certainly to several hundred feet. The Gokase-gawa runs to the east coast, and down its canyon we took our course after a few more days in the heart of Kiushiu. The Fic. 10. OVEKLOOKING FROM THE HILLS THE BEAUTIFUL CITY AND Bay OF KAGOSHIMA IN SOUTHERNMOST JAPAN. In the deep bay stands the island volcano Sakura-jima, almost 4,000 feet high, another of the active volcanoes of Kiushiu. In 1863 this city was bombarded and partly burnt by an English admiral and his squadron. Again in 1877 it was set on fire during the last days of the Satsuma rebellion, and here at that time the final desperate stand of some of the Japanese nobility was made against the principle of Europeanization. THE GREAT JAPANESE VOLCANO ASO 49 scenery was magnificent. High mountains rose on every hand out of the fairly wide and level bottom-land within the canyon. But this was not the old canyon bottom, it was the upper surface of the lava filling. We made this discovery on reaching the middle of the valley, where much to our surprise we came upon a tremendous gorge cut squarely out of it by the river, which is eating its way down again to find its old course. It has already reached a depth of 300 or 400 feet through the lava flow and has left a rift vertically walled on either side by columns of andesite that give a stately beauty to the cliffs. The river rushes down a steep channel, always growing with the addi- tion of little tributaries, which tumble in over the parapet from out of jungles of greenery that overhang the edge and festoon the rocks with drooping purple tassels of wistaria. In its lower course it flows more quietly and widens, the rapids become less frequent and the canyon loses the intensity of its angles. But still the old lava flow continues. From the village of Takeshita, which means “below the falls,’ we took a rowboat and glided down the broad stream the rest of the way to the sea, away from the wild grandeur of the mountain scenery into the midst of the picturesque landscapes of the Japanese lowland. VOL. LXxI.—4 50 POPULAR SCIENCE MONTHLY CONTROL OF THE COLORADO RIVER REGAINED By CHARLES ALMA BYERS LOS ANGELES, CAL. HE Colorado River, creator of the much-discussed Salton Sea, has at last been captured. Its waters, always of uncertain quantity and consequently often threatening, no longer are poured into Salton Sink by way of a river-like irrigation ditch, but instead flow peaceably into the Gulf of California as in the days before man had tampered with it for irrigation purposes. And incidental to the river’s cap- ture, Imperial Valley, that new agricultural region rescued by irriga- tion from the Colorado Desert, an area lying below the level of the sea, and a region that is some day destined to become worth millions of dollars, is no longer in danger of being inundated by the murky waters of this treacherous “yellow dragon” and consequently wiped practically out of existence. The going astray of the Colorado River, and the trouble incidental thereto, which was described in THE PopuLtar ScIENCE MONTHLY some months ago, has occasioned much study and deep concern by engineers all over the country, and has attracted the attention of the heads of two governments—the United States and Mexico. It has created an inland sea in Salton Sink, adjacent to Imperial Valley, that covers about 400 square miles, destroyed the works of the New Liverpool Salt Company, caused three different removals of several miles of the Southern Pacific Railroad, and necessitated the expendi- ture of many thousands of dollars towards its control, besides threaten- ing to submerge the Imperial Valley, several small cities of con- siderable importance and a number of rich mineral deposits. The trouble with the Colorado River, it will be recalled, began in September, 1904. The California Development Company, promoters of the Imperial land colony, needed more water for agricultural purposes than their old irrigation ditch was then supplying, and to remedy the shortage an incision was made in the banks of the river at a point about four miles below the old tapping point, and below the international boundary line between the United States and Mexico. A flood in the river soon cut this new channel so deep as to place the flow beyond control. Gradually this ditch was eroded into a river that at times carried the entire flow of the Colorado River, sometimes amounting to 40,000 second feet of water, and poured it into Salton Sink. CONTROL OF THE COLORADO RIVER 5a In all, six attempts had been made to capture the runaway river before the last and successful one. The first five, however, were poorly carried out and practically amounted to nil in the final success. The sixth proved better, and for a time it seemed to solve the problem. Ii was completed on November 4, 1906, and on the night of December 7, 1906, during the flood, the river again ate its way through the barrier of willow matting, piles, rocks and dirt and once more wended its way toward Salton Sink. This dam, called the Hind Dam, in honor of the field engineer, Thomas J. Hind, therefore withstood the rebellious-inclined Colorado for a period of only thirty-three days. The Hind Dam, which, though not a success of itself, aided in the final capture, was a conglomerate creation 170 feet wide at the base, 30 feet across at the top and 35 feet high at the deepest places in the break. It was 3,000 feet in length, of which 600 feet was of rock construction and 2,400 feet of earth and gravel. Its founda- tion consisted of a heavy, strong mat of willow and cable, held in place by strong piles, about 1,100 in number and from forty to sixty feet in length. The mat was created by the use of 2,200 cords of willow, cut by Indians, 40 miles of five-eighths-inch woven steel cable, and 10,000 cable clips. It was 100 feet wide and 800 feet in length, divided into eighteen sections, and was laid across the river by being uncoiled from a barge floated across the stream. ~ The piles driven into the mat were also made to serve as a sup- port for a temporary railroad. From this road carload after carload of material was dumped into the gap, in all there being 70,000 tons of rock, 40,000 cubic feet of gravel, 40,000 cubic feet of clay, and 100,000 sacks of sand, besides about 500,000 yards of dirt thrown up by teams and dredges. To carry on this work as many as 1,100 men and 600 horses and mules, besides several steam dredges, shovels, pile drivers and an almost endless string of freight cars, were employed at one time. The cost of the work to the Southern Pacific Railway Company, which, headed by Engineer Epes Randolph, engineered the undertaking, reached an average rate of $10,000 per day for one hundred days. The break that occurred in the river after this dam was com- pleted, in December, was at a part about 2,500 feet below the works, and was 1,100 feet wide. Colonel Randolph again assembled his forces, placed E. K. Clark, engineer of the Tucson division of the Southern Pacific Railroad, in direct charge, and work was recom- menced to solve this troublesome problem. Another dam, called the Clarke Dam, was built and by it the Colorado River has at last been permanently confined to its old channel. To build this dam no attempt to follow science was made. The Southern Pacific placed their entire road subject to the orders of the 52 POPULAR SCIENCE MONTHLY engineers, and materials of almost every kind were rushed to the break from points far and near as fast as it could be taken care of. Piles were driven, a temporary road was constructed across the break, and there was almost a continual dumping of rock, gravel and dirt into the gap. A carload of material was dumped every seven minutes both day and night, and in the short period of thirteen days 100,000 tons were disposed of, bringing the dam up to water level. Much of this material was hauled a distance of 380 miles. The Clarke Dam was practically completed February 10, 1906, and the river was declared conquered. The dam proper is 1,200 feet in length, of which 700 feet is of rock and 500 feet of gravel and earth. Work, however, did not cease with the completion of the dam, and, since February 10, several miles of earth embankment have been built to insure permanent success. This work will continue until about sixteen miles of levee is built along the west bank of the river, in addition to the two dams with a combined length of 4,200 feet. The river, in the vicinity of the breaks, or dams, and near the inter- national boundary line, for a distance of about seven miles, flows through a throat only 2,160 feet wide, and is considerably higher than the territory lying to the west. The levee follows the river for this distance, and then swings away to the west towards the Black Buttes, leaving the river below this point to follow its own inclinations. The California Development Company and the Southern Pacific Railroad Company have expended to date upon this work a sum in excess of $3,500,000. This is an enormous sum to dump into a river, it seems, but since the river is captured and all interests immune from further trouble, the two companies feel amply rewarded. The United States government has inaugurated steps to place Im- perial Valley in charge of the Government Reclamation Service, but what the outcome of the move will be is not yet known. In the meantime the California Development Company will conutine to manage the colony, and will install new head-gates for their irriga- tion ditches and otherwise improve the system. The farmers of the valley feel secure now for the first time in two years, and Imperial Valley promises to become a prospering community. THE VALUE OF SCIENCE 53 THE VALUE OF SCIENCE ScIENCE AND REALITY By M. H. POINCARE MEMBER OF THE INSTITUTE OF FRANCE 5. Contingence and Determinism I DO not intend to treat here the question of the contingence of the laws of nature, which is evidently insoluble, and on which so much has already been written. I only wish to call attention to what different meanings have been given to this word, contingence, and how advantageous it would be to distinguish them. If we look at any particular law, we may be certain in advance that it can only be approximative. It is, in fact, deduced from experi- mental verifications, and these verifications were and could be only approximate. We should always expect that more precise measure- ments will oblige us to add new terms to our formulas; this is what has happened, for instance, in the case of Marriotte’s law. Moreover the statement of any law is necessarily incomplete. This enunciation should comprise the enumeration of all the antecedents in virtue of which a given consequent can happen. I should first de- scribe all the conditions of the experiment to be made and the law would then be stated: If all the conditions are fulfilled, the phe- nomenon will happen. But we shall be sure of not having forgotten any of these condi- tions only when we shall have described the state of the entire uni- verse at the instant ¢; all the parts of this universe may, in fact, exercise an influence more or less great on the phenomenon which must happen at the instant ¢ + dt. Now it is clear that such a description could not be found in the enunciation of the law; besides, if it were made, the law would become incapable of application; if one required so many conditions, there would be very little chance of their ever being all realized at any moment. Then as one can never be certain of not having forgotten some essential condition, it can not be said: If such and such conditions are realized, such a phenomenon will occur; it can only be said: If such and such conditions are realized, it is probable that such a phenomenon will occur, very nearly. 54 POPULAR SCIENCE MONTHLY Take the law of gravitation, which is the least imperfect of all known laws. It enables us to foresee the motions of the planets. When I use it, for instance, to calculate the orbit of Saturn, I neglect the action of the stars, and in doing so, I am certain of not deceiving myself, because I know that these stars are too far away for their action to be sensible. I announce, then, with a quasi-certitude that the coordinates of Saturn at such an hour will be comprised between such and such limits. Yet is that certitude absolute? Could there not exist in the universe some gigantic mass, much greater than that of all the known stars and whose action could make itself felt at great distances? That mass might be animated by a colossal velocity, and after having circu- jated from all time at such distances that its influence had remained hitherto insensible to us, it might come all at once to pass near us. Surely it would produce in our solar system enormous perturbations that we could not have foreseen. All that can be said is that such an event is wholly improbable, and then, instead of saying: Saturn will be near such a point of the heavens, we must limit ourselves to saying: Saturn will probably be near such a point of the heavens. Although this probability may be practically equivalent to certainty, it is only a probability. For all these reasons, no particular law will ever be more than approximate and probable. Scientists have never failed to recognize this truth; only they believe, right or wrong, that every law may be replaced by another closer and more probable, that this new law will itself be only provisional, but that the same movement can continue indefinitely, so that science in progressing will possess laws more and more probable, that the approximation will end by differing as little as you choose from exactitude and the probability from certitude. If the scientists who think thus were right, must it still be said that the laws of nature are contingent, even though each law, taken in particular, may be qualified as contingent? Or must one require, before concluding the contingence of the natural laws, that this progress have an end, that the scientist finish some day by being arrested in his search for a closer and closer approximation and that, beyond a certain limit, he thereafter meet in nature only caprice? In the conception of which I have just spoken (and which I shall call the scientific conception), every law is only a statement, imperfect and provisional, but it must one day be replaced by another, a superior law, of which it is only a crude image. No place therefore remains for the intervention of a free will. It seems to me that the kinetic theory of gases will furnish us a striking example. You know that in this theory all the properties of gases are ex- THE VALUE OF SCIENCE 55 plained by a simple hypothesis; it is supposed that all the gaseous molecules move in every direction with great velocities and that they follow rectilineal paths which are disturbed only when one molecule passes very near the sides of the vessel or another molecule. The effects our crude senses enable us to observe are the mean effects, and in these means, the great deviations compensate, or at least it is very improbable that they do not compensate; so that the observable phe- nomena follow simple laws such as that of Mariotte or of Gay-Lussac. But this compensation of deviations is only probable. The molecules incessantly change place and in these continual displacements the figures they form pass successively through all possible combinations. Singly these combinations are very numerous; almost all are in con- formity with Mariotte’s law, only a few deviate from it. These also will happen, only it would be necessary to wait a long time for them. If a gas were observed during a sufficiently long time, it would cer- tainly be finally seen to deviate, for a very short time, from Mariotte’s law. How long would it be necessary to wait? If it were desired to calculate the probable number of years, it would be found that this number is so great that to write only the number of places of figures employed would still require half a score places of figures. No matter; enough that it may be done. I do not care to discuss here the value of this theory. It is evident that if it be adopted, Mariotte’s law will thereafter appear only as contingent, since a day will come when it will not be true. And yet, think you the partisans of the kinetic theory are adversaries of deter- minism? Far from it; they are the most ultra of mechanists. Their molecules follow rigid paths, from which they depart only under the influence of forces which vary with the distance, following a perfectly determinate law. There remains in their system not the smallest place either for freedom, or for an evolutionary factor, properly so- called, or for anything whatever that could be called contingence. I add, to avoid mistake, that neither is there any evolution of Mariotte’s law itself; it ceases to be true after I know not how many centuries; but at the end of a fraction of a second it again becomes true and that for an incalculable number of centuries. And since I have pronounced the word evolution, let us clear away another mistake. It is often said: Who knows whether the laws do not evolve and whether we shall not one day discover that they were not at the Carboniferous epoch what they are to-day? What are we to understand by that? What we think we know about the past state of our globe, we deduce from its present state. And how is this deduction made? It is by means of laws supposed known. The law being a relation between the antecedent and the consequent, enables us equally well to deduce the consequent from the antecedent, that is, to 56 POPULAR SCIENCE MONTHLY foresee the future, and to deduce the antecedent from the consequent, that is, to conclude from the present to the past. The astronomer who knows the present situation of the stars can from it deduce their future situation by Newton’s law, and this is what he does when he constructs ephemerides; and he can equally deduce from it their past situation. The calculations he thus can make can not teach him that Newton’s law will cease to be true in the future, since this law is precisely his point of departure; not more can they tell him it was not true in the past. Still in what concerns the future, his ephem- erides can one day be tested and our descendants will perhaps recog- nize that they were false. But in what concerns the past, the geo logic past which had no witnesses, the results of his calculation, like those of all speculations where we seek to deduce the past from the present, escape by their very nature every species of test. So that if the laws of nature were not the same in the Carboniferous age as at the present epoch, we shall never be able to know it, since we can know nothing of this age only what we deduce from the hypothesis of the permanence of these laws. Perhaps it will be said that this hypothesis might lead to contra- dictory results and that we shall be obliged to abandon it. Thus, in what concerns the origin of life, we may conclude that there have always been living beings, since the present world shows us always life springing from life; and we may also conclude that there have not always been, since the application of the existent laws of physics to the present state of our globe teaches us that there was a time when this globe was so warm that life on it was impossible. But contradictions of this sort can always be removed in two ways; it may be supposed that the actual laws of nature are not exactly what we have assumed; or else it may be supposed that the laws of nature actually are what we have assumed, but that it has not always been so. It is evident that the actual laws will never be sufficiently well known for us not to be able to adopt the first of these two solutions and for us to be constrained to infer the evolution of natural laws. On the other hand, suppose such an evolution; assume, if you wish, that humanity lasts sufficiently long for this evolution to have wit- nesses. The same antecedent shall preduce, for instance, different con- sequents at the Carboniferous epoch and at the Quaternary. That evidently means that the antecedents are closely alike; if all the cir- cumstances were identical, the Carboniferous epoch would be indis- tinguishable from the Quaternary. Evidently this is not what is sup- posed. What remains is that such antecedent, accompanied by such accessory circumstance, produces such consequent; and that the same antecedent, accompanied by such other accessory circumstance, pro- duces such other consequent. Time does not enter into the affair. THE VALUE OF SCIENCE 57 The law, such as ill-informed science would have stated it, and which would have affirmed that this antecedent always produces this consequent, without taking account of the accessory circumstances, this law, which was only approximate and probable, must be replaced by another law more approximate and more probable, which brings in these accessory circumstances. We always come back, therefore, to that same process which we have analyzed above, and if humanity should discover something of this sort, it would not say that it is the laws which have evoluted, but the circumstances which have changed. Here, therefore, are several different senses of the word contingence. M. LeRoy retains them all and he does not sufficiently distinguish them, but he introduces a new one. Experimental laws are only approximate, and if some appear to us as exact, it is because we have artificially transformed them into what I have above called a principle. We have made this transformation freely, and as the caprice which has determined us to make it is something eminently contingent, we have communicated this contingence to the law itself. It is in this sense that we have the right to say that determinism supposes freedom, since it is freely that we become determinists. Perhaps it will be found that this is to give large scope to nominalism and that the introduction of this new sense of the word contingence will not help much to solve all those questions which naturally arise and of which we have just been speaking. I do not at all wish to investigate here the foundations of the principle of induction; I know very well that I shall not succeed; it is as difficult to justify this principle as to get on without it. I only wish to show how scientists apply it and are forced to apply it. When the same antecedent recurs, the same consequent must like- wise recur; such is the ordinary statement. But reduced to these terms this principle could be of no use. For one to be able to say that the same antecedent recurred, it would be necessary for the circum- stances all to be reproduced, since no one is absolutely indifferent, and for them to be exactly reproduced. And, as that will never happen, the principle can have no application. We should therefore modify the enunciation and say: If an ante- cedent A has once produced a consequent B, an antecedent A’, slightly different from A, will produce a consequent B’, slightly different from B. But how shall we recognize that the antecedents A and A’ are “slightly different”? If some one of the circumstances can be ex- pressed by a number, and this number has in the two cases values very near together, the sense of the phrase “ slightly different ” is rela- tively clear; the principle then signifies that the consequent is a continuous function of the antecedent. And as a practical rule, we reach this conclusion that we have the right to interpolate. This 58 POPULAR SCIENCH MONTHLY is in fact what scientists do every day, and without interpolation all science would be impossible. Yet observe one thing. The law sought may be represented by a curve. Experiment has taught us certain points of this curve. In virtue of the principle we have just stated, we believe these points may be connected by a continuous graph. We trace this graph with the eye. New experiments will furnish us new points of the curve. If these points are outside of the graph traced in advance, we shall have to modify our curve, but not to abandon our principle. Through any points, however numerous they may be, a continuous curve may always be passed. Doubtless, if this curve is too capricious, we shall be shocked (and we shall even suspect errors of experiment), but the principle will not be directly put at fault. Furthermore, among the circumstances of a phenomenon, there are some that we regard as negligible, and we shall consider A and A’ as slightly different if they differ only by these accessory circumstances. For instance, I have ascertained that hydrogen unites with oxygen under the influence of the electric spark, and I am certain that these two gases will unite anew, although the longitude of Jupiter may have changed considerably in the interval. We assume, for instance, that the state of distant bodies can have no sensible influence on terrestrial phenomena, and that seems in fact requisite, but there are cases where the choice of these practically indifferent circumstances admits of more arbitrariness or, if you choose, requires more tact. One more remark: The principle of induction would be inapplicable if there did not exist in nature a great quantity of bodies like one another, or almost alike, and if we could not infer, for instance, from one bit of phosphorus to another bit of phosphorus. If we reflect on these considerations, the problem of determinism and of contingence will appear to us in a new light. Suppose we were able to embrace the series of all phenomena of the universe in the whole sequence of time. We could envisage what might be called the sequences, I mean relations between antecedent and consequent. I do not wish to speak of constant relations or laws, I envisage separately (individually, so to speak) the different sequences realized. We should then recognize that among these sequences there are no two altogether alike. But, if the principle of induction, as we have just stated it, is true, there will be those almost alike and that can be classed alongside one another. In other words, it is possible to make a classification of sequences. It is to the possibility and the legitimacy of such a classification that determinism, in the end, reduces. This is all that the preceding analysis leaves of it. Perhaps under this modest form it will seem less appalling to the moralist. THE VALUE OF SCIENCE 59 It will doubtless be said that this is to come back by a detour to M. LeRoy’s conclusion which a moment ago we seemed to reject: we are determinists voluntarily. And in fact all classification supposes the active intervention of the classifier. I agree that this may be maintained, but it seems to me that this detour will not have been useless and will have contributed to enlighten us a litle. 6. Objectivity of Science I arrive at the question set by the title of this article: What is the objective value of science? And first what should we understand by objectivity ? What guarantees the objectivity of the world in which we live is that this world is common to us with other thinking beings. Through the communications that we have with other men, we receive from them ready-made reasonings; we know that these reasonings do not come from us and at the same time we recognize in them the work of reasonable beings like ourselves. And as these reasonings appear to fit the world of our sensations, we think we may infer that these rea- sonable beings have seen the same thing as we; thus it is we know we have not been dreaming. Such, therefore, is the first condition of objectivity; what is ob- jective must be common to many minds and consequently transmissible from one to the other, and as this transmission can only come about by that “ discourse ” which inspires so much distrust in M. LeRoy, we are even forced to conclude: no discourse, no objectivity. The sensations of others will be for us a world eternally closed. We have no means of verifying that the sensation I call red is the same as that which my neighbor calls red. Suppose that a cherry and a red poppy produce on me the sensa- tion A and on him the sensation B and that, on the contrary, a leaf produces on me the sensation B and on him the sensation A. It is clear we shall never know anything about it; since I shall call red the sensation A and green the sensation B, while he will call the first green and the second red. In compensation, what we shall be able to ascertain is that, for him as for me, the cherry and the red poppy pro- duce the same sensation, since he gives the same name to the sensations he feels and I do the same. Sensations are therefore intransmissible, or rather all that is pure quality in them is intransmissible and forever impenetrable. But it is not the same with relations between these sensations. From this point of view, all that is objective is devoid of all quality and is only pure relation. Certes, I shall not go so far as to say that objectivity is only pure quantity (this would be to particularize too far the nature of the relations in question), but we understand 60 POPULAR SCIENCE MONTHLY how some one could have been carried away into saying that the world is only a differential equation. With due reserve regarding this paradoxical roast we must nevertheless admit that nothing is objective which is not transmissible, and consequently that the relations between the sensations can alone have an objective value. Perhaps it will be said that the esthetic emotion, which is common to all mankind, is proof that the qualities of our sensations are also the same for all men and hence are objective. But if we think about this, we shall see that the proof is not complete; what is proved is that this emotion is aroused in John as in James by the sensations to which James and John give the same name or by the corresponding combina- tions of these sensations; either because this emotion is associated in John with the sensation A, which John calls red, while parallelly it is associated in James with the sensation B, which James -calls red; or better because this emotion is aroused, not by the qualities them- selves of the sensations, but by the harmonious combination of their relations of which we undergo the unconscious impression. Such a sensation is beautiful, not because it possesses such a quality, but because it occupies such a place in the woof of our associations of ideas, so that it can not be excited without putting in motion the ‘receiver’ which is at the other end of the thread and which cerre- sponds to the artistic emotion. Whether we take the moral, the esthetic or the scientific point of view, it is always the same thing. Nothing is objective except what is identical for all; now we can only speak of such an identity if a comparison is possible, and can be translated into a ‘money of ex- change’ capable of transmission from one mind to another. Nothing, therefore, will have objective value except what is transmissible by ‘discourse,’ that is, intelligible. But this is only one side of the question. An absolutely disordered aggregate could not have objective value since it would be unintelligible, but no more can a well-ordered assemblage have it, if it does not correspond to sensations really experienced. It seems to me super- fluous to recall this condition, and I should not have dreamed of it, if it had not lately been maintained that physics is not an experimental science. Although this opinion has no chance of being adopted either by physicists or by philosophers, it is well to be warned so as not to let oneself slip over the declivity which would lead thither. Two conditions are therefore to be fulfilled, and if the first separates reality? from the dream, the second distinguishes it from the romance. 21 here use the word real as a synonym of objective; I thus conform to common usage; perhaps I am wrong, our dreams are real, but they are not objective. THE VALUE OF SCIENCE 61 Now what is science? I have explained in the preceding article, it is before all a classification, a manner of bringing together facts which appearances separate, though they were bound together by some natural and hidden kinship. Science, in other words, is a system of relations. Now we have just said, it is in the relations alone that objectivity must be sought; it would be vain to seek it in beings con- sidered as isolated from one another. To say that science can not have objective value since it teaches us only relations, this is to reason backwards, since, precisely, it is relations alone which can be regarded as objective. External objects, for instance, for which the word object was in- vented, are really objects and not fleeting and fugitive appearances, because they are not only groups of sensations, but groups cemented by a constant bond. It is this bond, and this bond alone, which is the object in itself, and this bond is a relation. Therefore, when we ask what is the objective value of science, that does not mean: Does science teach us the true nature of things? but it means: Does it teach us the true relations of things? To the first question, no one would hesitate to reply, no; but I think we may go farther; not only science can not teach us the nature of things; but nothing is capable of teaching it to us and if any god knew it, he could not find words to express it. Not only can we not divine the response, but if it were given to us, we could understand nothing of it; I ask myself even whether we really understand the question. When, therefore, a scientific theory pretends to teach us what heat is, or what is electricity, or life, it is condemned beforehand; all it can give us is only a crude image. It is, therefore, provisional and crumbling. The first question being out of reason, the second remains. Can science teach us the true relations of things? What it joins together should that be put asunder, what it puts asunder should that be joined together ? To understand the meaning of this new question, it is needful to refer to what was said above on the conditions of objectivity. Have these relations an objective value? That means: Are these relations the same for all? Will they still be the same for those who shall come after us? It is clear that they are not the same for the scientist and the ignorant person. But that is unimportant, because if the ignorant person does not see them all at once, the scientist may succeed in making him see them by a series of experiments and reasonings. The thing essential is that there are points on which all those acquainted with the experiments made can reach accord. 62 POPULAR SCIENCE MONTHLY The question is to know whether this accord will be durable and whether it will persist for our successors. It may be asked whether the unions that the science of to-day makes will be confirmed by the science of to-morrow. To affirm that it will be so we can not invoke any a priort reason; but this is a question of fact, and science has already lived long enough for us to be able to find out by asking its history whether the edifices it builds stand the test of time, or whether they are only ephemeral constructions. Now what do we see? At the first blush it seems to us that the theories last only a day and that ruins upon ruins accumulate. To- day the theories are born, to-morrow they are the fashion, the day after to-morrow they are classic, the fourth day they are superannuated, and the fifth they are forgotten. But if we look more closely, we see that what thus succumb are the theories, properly so called, those which pretend to teach us what things are. But there is in them something which usually survives. If one of them has taught us a true relation, this relation is definitively acquired, and it will be found again under a new disguise in the other theories which will successively come to reign in place of the old. Take only a single example: The theory of the undulations of the ether taught us that light is a motion; to-day fashion favors the electromagnetic theory which teaches us that light is a current. We do not consider whether we could reconcile them and say that light is a current, and that this current is a motion. As it is probable in any case that this motion would not be identical with that which the partisans of the old theory presume, we might think ourselves justified in saying that this old theory is dethroned. And yet something of it remains, since between the hypothetical currents which Maxwell supposes there are the same relations as between the hypothetical motions that Fresnel supposed. There is, therefore, something which remains over and this something is the essential. This it is which explains how we see the present physicists pass without any embarrass- ment from the language of Fresnel to that of Maxwell. Doubtless many connections that were believed well established have been aban- doned, but the greatest number remain and it would seem must remain. And for these, then, what is the measure of their objectivity? Well, it is precisely the same as for our belief in external objects. These latter are real in this, that the sensations they make us feel appear to us as united to each other by I know not what indestructible cement and not by the hazard of a day. In the same way science reveals to us between phenomena other bonds finer but not less solid; these are threads so slender that they long remained unperceived, but once noticed there remains no way of not seeing them; they are therefore not less real than those which give their reality to external objects; small THE VALUE OF SCIENCE 63 matter that they are more recently known since neither can perish before the other. It may be said, for instance, that the ether is no less real than any external body; to say this body exists is to say there is between the color of this body, its taste, its smell, an intimate bond, solid and persistent; to say the ether exists is to say there is a natural kinship between all the optical phenomena, and neither of the two propositions has less value than the other. And the scientific syntheses have in a sense even more reality than those of the ordinary senses, since they embrace more terms and tend to absorb in them the partial syntheses. It will be said that science is only a classification and that a classi- fication can not be true, but convenient. But it is true that it is convenient, it is true that it is so not only for me, but for all men; it is true that it will remain convenient for our descendants; it is true finally that this can not be by chance. In sum, the sole objective reality consists in the relations of things whence results the universal harmony. Doubtless these relations, this harmony, could not be conceived outside of a mind which conceives them. But they are nevertheless objective because they are, will become, or will remain, common to all thinking beings. This will permit us to revert to the question of the rotation of the earth which will give us at the same time a chance to make clear what precedes by an example. %. The Rotation of the Earth “. . . Therefore,” have I said in Science and Hypothesis, “ this affirmation, the earth turns round, has no meaning . . . or rather these two propositions, the earth turns round, and, it is more con- venient to suppose that the earth turns round, have one and the same meaning.” These words have given rise to the strangest interpretations. Some have thought they saw in them the rehabilitation of Ptolemy’s system, and perhaps the justification of Galileo’s condemnation. Those who had read attentively the whole volume could not, how- ever, delude themselves. This truth, the earth turns round, was put on the same footing as Euclid’s postulate, for example. Was that to reject it? But better; in the same language it may very well be said: These two propositions, the external world exists, or, it is more con- venient to suppose that it exists, have one and the same meaning. So the hypothesis of the rotation of the earth would have the same degree of certitude as the very existence of external objects. But after what we have just explained in the fourth part, we may go farther. A physical theory, we have said, is by so much the more 64 POPULAR SCIENCE MONTHLY true, as it puts in evidence more true relations. In the light of this new principle, let us examine the question which occupies us. No, there is no absolute space; these two contradictory propositions: ‘The earth turns round’ and ‘The earth does not turn round’ are, therefore, neither of them more true than the other. To affirm one while denying the other, in the kinematic sense, would be to admit the existence of absolute space. But if the one reveals true relations that the other hides from us, we can nevertheless regard it as physically more true than the other, since it has a richer content. Now in this regard no doubt is possible. Behold the apparent diurnal motion of the stars, and the diurnal motion of the other heavenly bodies, and besides, the flattening of the earth, the rotation of Foucault’s pendulum, the gyration of cyclones, the trade-winds, what not else? For the Ptolemaist all these phe- nomena have no bond between them; for the Copernican they are produced by the one same cause. In saying, the earth turns round, I affirm that all these phenomena have an intimate relation, and that is true, and that remains true, although there is not and can not be absolute space. So much for the rotation of the earth upon itself; what shall we say of its revolution around the sun? Here again, we have three phe- nomena which for the Ptolemaist are absolutely independent and which for the Copernican are referred back to the same origin; they are the apparent displacements of the planets on the celestial sphere, the aberration of the fixed stars, the parallax of these same stars. Is it by chance that all the planets admit an inequality whose period is a year, and that this period is precisely equal to that of aberration, precisely equal besides to that of parallax? To adopt Ptolemy’s system is to answer, yes; to adopt that of Copernicus is to answer, no; this is to affirm that there is a bond between the three phenomena and that also is true although there is no absolute space. In Ptolemy’s system, the motions of the heavenly bodies can not be explained by the action of central forces, celestial mechanics is impossible. The intimate relations that celestial mechanics reveals to us between all the celestial phenomena are true relations; to affirm the immobility of the earth would be to deny these relations, that would be to fool ourselves. The truth for which Galileo suffered remains, therefore, the truth, although it has not altogether the same meaning as for the vulgar, and its true meaning is much more subtle, more profound and more rich. 8. Science for Its Own Sake Not against M. LeRoy do I wish to defend science for its own sake; may be this is what he condemns, but this is what he cultivates, since THE VALUE OF SCIENCE 65 he loves and seeks truth and could not live without it. But I have some thoughts to express. We can not know all facts and it is necessary to choose those which are worthy of being known. According to Tolstoi, scientists make this choice at random, instead of making it, which would be reasonable, with a view to practical applications. On the contrary, scientists think that certain facts are more interesting than others, because they com- plete an unfinished harmony, or because they make one foresee a great number of other facts. If they are wrong, if this hierarchy of facts that they implicitly postulate is only an idle illusion, there could be no science for its own sake, and consequently there could be no science. As for me, I believe they are right, and, for example, I have shown above what is the high value of astronomical facts, not because they are capable of practical applications, but because they are the most instructive of all. It is only through science and art that civilization is of value. Some have wondered at the formula: science for its own sake; and yet it is as good as life for its own sake, if life is only misery; and even as happiness for its own sake, if we do not believe that all pleasures are of the same quality, if we do not wish to admit that the goal of civilization is to furnish alcohol to people who love to drink. Every act should have an aim. We must suffer, we must work, we must pay for our place at the game, but this is for seeing’s sake; or at the very least that others may one day see. All that is not thought is pure nothingness; since we can think only thought and all the words we use to speak of things can express only thoughts, to say there is something other than thought, is therefore an affirmation which can have no meaning. And yet—strange contradiction for those who believe in time— geologic history shows us that life is only a short episode between two eternities of death, and that, even in this episode, conscious thought has lasted and will last only a moment. Thought is only a gleam in the midst of a long night. But it is this gleam which is everything. voL. LxxxI.—5 66 POPULAR SCIENCE MONTHLY THE NEWER HYGIENE? By WILFRED H. MANWARING, M.D. ASSOCIATE PROFESSOR OF PATHOLOGY, INDIANA UNIVERSITY NSTRUCTION in the nature of infectious diseases, especially in the means of transmitting these diseases from one person to another, is required by law in all our public schools. This law is of great value; for it is only through the intelligent cooperation of a well-informed public, that hygienic and sanitary measures designed to control and stamp out infectious diseases can be successful. A wide diffusion of this knowledge will go far to make tuberculosis a thing of the past, and diphtheria and small-pox unknown. In obedience to the legal requirement, there are taught, in our public schools, certain elementary facts regarding the nature of patho- genic bacteria, and certain facts regarding the ways in which they are transmitted from one person to another. These facts in themselves are of inestimable value. But they are insufficient. The presence of bacteria within or upon the human body, the transmission of disease-germs from the sick to the well, is but one of the factors tending to cause disease. To acquire a disease it is neces- sary, not only to acquire the germs of that disease, but there usually must be a lowering of bodily resistance as well. Every fourth person in this room is carrying daily in his throat and mouth virulent pneumococci. Yet he does not acquire pneumonia. And why? Because there is an efficient defense against this disease in the healthy human body. Some day this defense will be lowered and pneumonia develop. Most soldiers in the Philippines carry in their intestinal canals virulent germs of dysentery; and with no ill effects, till intoxication or dietary excesses lower the intestinal resist- ance. We daily inhale germs of tuberculosis. Some day, when our resistance is low, we acquire the disease. A knowledge of the body’s fighting power against bacteria, a knowl- edge of the ways in which that power can be increased or decreased by hereditary influences and by modes of life, is therefore of hygienic importance, and should form part of the curriculum of every public school. The body fights disease in many ways. It will be sufficient for hygienic purposes to teach but three of these ways: the method of antitoxines, the method of antiseptics and the method of phagocytosis. An address before the Indiana Academy of Science, at Indianapolis, De- cember 1, 1906. THE NEWER HYGIENE 67 There are many diseases in which the symptoms are caused, not by the bacteria themselves, but by the chemical poisons the bacteria manu- facture. Thus, in tetanus, or lock-jaw, the bacteria grow, perhaps unnoticed, at the bottom of the Fourth-of-July wound on the hand or foot; but the chemical poisons they manufacture, carried by the blood to the brain and spinal cord, cause the spasms and convulsions that characterize the disease. In diphtheria, the bacteria rarely enter the body, but grow in grayish-white masses on the moist surfaces of the mouth and throat. The chemical poisons they manufacture, absorbed by the tissues, cause the paralysis and heart failure that characterize the disease. The body has the power of forming substances that neutralize these poisons. To these neutralizing substances the name antitoxine has been given. This fact is of hygienic importance for two reasons. First, because it is sometimes possible to assist the body in its efforts to form anti- toxines, by introducing into it antitoxines artificially prepared; and, seeond, because the body’s power to form these substances is modified by mode of life. A horse that has been repeatedly injected with poison manufactured by the germs of diphtheria growing on an artificial cul- ture medium, develops enormous amounts of diphtheria antitoxine. A few drops of its serum will render harmless large quantities of diphtheria poison." Overwork, insufficient clothing, improper food, alcoholic excesses, lack of sleep, and other factors, so lower the anti- toxine-forming power of the human body, as to greatly increase the dangers from infection. The second way of hygienic importance in which the body fights disease is by the formation of chemical substances that, although they have no influence on the poisons manufactured by bacteria, have an even more important property, that of killing the bacteria themselves. The presence of these antiseptic, or bacteria-killing substances in the blood and tissue juices is easily shown. One has but to mix bacteria with serum, and test, from time to time, by simply cultural methods,? whether or not the bacteria are alive. Thus, in one experiment, there were mixed with human serum germs of typhoid fever in such numbers that every drop of the serum contained 50,000 bacteria. Two minutes later, but 20,000 of these were alive; at the end of ten minutes, but 800; and in twenty-five minutes, they were all dead. Not only can serum kill bacteria, but most of the secretions of the healthy human body are bacteria-killing as well. Gastric juice, vaginal secretion and nasal secretion, kill bacteria in enormous numbers. The * Through the use of diphtheria antitoxine in practical medicine the mor- tality from diphtheria has been reduced from the 24 per cent. to 40 per cent. it was, twenty years ago, to the less than | per cent. it now is, in well-treated cases. ?See PopuLtaR ScIENCE MONTHLY, Vol. 66, pp. 474—477. 68 POPULAR SCIENCE MONTHLY hygienic significance of this is evident from the fact that these bac- teria-killing substances, also, are modified by modes of life. Dietary excesses may so lower the bacteria-killing properties of gastric juice, and unsanitary conditions so lessen that of tissue juices, that sus- ceptibility to infectious diseases is greatly increased. The third way of hygienic importance in which the body fights disease is by phagocytosis. In the body there are millions of white blood corpuscles, each having the power of independent motion and as one of its functions the faculty of eating and destroying disease germs. It is found that the bacteria-eating power of white corpuscles is largely dependent upon certain chemical substances* present in the blood and tissue juices. Without these substances, the eating of certain pathogenic bacteria does not take place. With them, it is very active. It is further found that these chemical substances are influenced by modes of life. That they may be increased or decreased under dif- ferent hygienic conditions. Phagocytosis, therefore, has also a place in popular hygienic knowledge. One of the unfortunate results of the spread of knowledge of patho- genic microorganisms is the formation of an unreasoning popular fear of disease germs. It is thought that a wide understanding of facts regarding bodily resistance will tend to replace this unfortunate germ- fear by a rational faith in the body’s marvelous powers. That it may turn the tide of hygienic endeavor from an exclusive fight against bacteria to a combined fight against bacteria and for bodily resistance. 5 Opsonins. THE FORMS OF SELECTION 69 THE FORMS OF SELECTION WITH REFERENCE TO THEIR APPLICATION TO MAN By G. P. WATKINS CORNELL UNIVERSITY HAT is the importance of natural selection in mankind is a question often asked. It is about as often answered without analysis. Put in this very general way, it contains, and confuses, several different questions. It is alleged that the conditions of life are so much improved by civilization that the struggle for existence is vanishing. Is that strug- gle, then, the only means of selection? And even if the cruder forms of selection are coming to be of little importance in man—which is doubtless the fact—are there not other kinds of selection still to be considered? It is time to analyze selection and determine its species. Then, when we know the kinds of selection, we may ask, with specific reference to each particular one: What is its importance in the present evolution of man? How far is each kind of selection operative in civilized society ? In our task of classification, let us consider first Darwin’s division. By his choice of a name for natural selection, Darwin assigns to nature a work analogous to that of the breeder of domestic animals. Natural and artificial are therefore two kinds or species of selection. The latter species is more definitely named breeder’s selection. Thus we obtain a first and provisional classification of the forms of selection as NATURAL SELECTION AND BREEDER’S SELECTION _ This simple classification is of importance, rather for an under- standing of the meaning of the term natural selection, as Darwin thought of it, than for our particular purposes. But we need to dwell upon it somewhat, and dispose of it, before attempting a more adequate analysis. The analogy from which the term natural selection is derived sug- gests a personification of nature. But natural selection is explicitly contrasted with conscious and personal factors.t Nature’s action is 2 Though requiring such a caveat, Darwin’s use of the term “ natural selec- tion” is a just and appropriate development in the meaning of the words. A possible wrong first impression is corrected by the most elementary knowledge of the subject. Not as much can be said for the proposed alternative, “ survival of the fittest.” The “ fittest ”’ can not well be further defined than as the fittest to survive. Thus we get back to mere survival. What we need to add to this 70 POPULAR SCIENCE MONTHLY impersonal and unconscious. It is not choice. Breeder’s selection, on the other hand, is consciously directed towards a known and very definite end, the chosen “ points.” The action of natural selection is no more conscious than is the action of the current of water that separates pebbles from sand. ‘This is the first great difference between natural selection and breeder’s selection. In another respect nature’s agency in selection differs fundamentally from that of the breeder. The mode of operation of breeder’s selection is positive ; that of natural selection is negative. Natural selection elim- inates by death the less well adapted members of a species. The better adapted survive and reproduce their kind. It does not matter in what respect they are better adapted. Protection from enemies is achieved in the case of the porcupine by his quills. The deer is saved by fleetness; wild cattle by the herding instinct, and by the effective use of horns and hoofs which that makes possible. No particular sort of quality is favored by natural selection, but those lacking in any respect are cut off. Nature has no plan. The line of evolution may take any direction; only, whatever the direction of improvement, woe to the hindmost. We have already seen that breed- er’s selection is conscious. That means its action is also positive. Attention is directed to reproducing and further evolving a favored type. The fan-tail pigeon exists because breeder’s sought to develop a type with an unusually large number of tail feathers. The fleece of the better breeds of sheep has become fine and long because breeders sought this particular result. Breeder’s selection positively favors certain individuals and types. Natural selection is primarily destruc- tive of the inferior. It is negative. Incidentally it allows certain better adapted individuals to survive. The third difference between natural selection and breeder’s selec- tion is that the latter operates directly on propagation, not necessarily by death. In “nature,” this is among wild animals, the capacity to survive is the whole story. It may in general be assumed that a wild animal that survives to maturity, and lives through its prime, will reproduce its kind. Though it is the essential point always, propaga- tion is not in general the crucial point with lower animals.?, Among is the notion of selection. Survival involving gelection is the thing of interest to the biologist and sociologist. The word “ fittest ” is often used as if it meant “best,” or at any rate most complex and most highly organized. It is particu- larly in its application to man that this reading of an ethical connotation into the “ survival of the fittest ” is to be deprecated. The words “natural selection,’ whatever may have been the force of the objection at the introduction of the term, have now quite lost any suggestion of purpose and choice. Even the single word selection is coming to be, used and understood as a generic term for natural selection, breeder’s selection, “social selection”—if there be such a thing—and for any other forms of selection. * For some it is in part, that is, in sexual selection. THE FORMS OF SELECTION 71 domestic animals, on the other hand, mere survival is not enough. Where the breeder intervenes, propagation becomes the critical point. The breeder can use inferior cattle as draft animals. He favors some definite type for reproduction, but rejected individuals are not there- fore destroyed. They may be put to some other use. Breeder’s selec- tion has, as we shall come to see, the character of reproductive selection. What Darwin, for the most part, dealt with as natural selection, we shall find it better to call lethal selection. The root-idea of natural selection, and of selection in general, is segregation into classes distinguished by differences as regards con- tinued existence of the type. One type is better adapted and survives, another is eliminated. Selection means, etymologically, a picking out and setting apart.* It is isolation in breeding. One eminent biologist and evolutionist, Romanes, would substitute this, as the more general term, for natural selection, and would make the latter but a species of isolation. If a superior type is to be evolved and preserved, breeding must be confined to those possessing in high degree the characteristics of that type. The most direct and sure way to isolate the fit and to prevent the propagation of unfit types is to kill off the unfit individuals. This is just what “nature” does. But there are other ways of attain- ing the same goal. Darwin never attempted a formal classification of the forms of selection. He does name, and treat at length, one other form besides natural selection, that is, sexual selection. Other kinds, which are of comparatively little importance in subhuman species, he either alto- gether fails to distinguish or touches only casually. By his use of the term sexual selection, which he contrasts with “ ordinary ”* or natural selection, he does imply that the word selection is, by destiny, if not by established usage, a generic term, to be qualified by an adjective in order to indicate the various species of selection. THE Four KINDs OF SELECTION We have now come to the distinctive purpose of this essay, that is a classification of the forms of selection having general applicability. I believe that adequate analysis—of course from the point of view of the sociologist, which is at the same time the most general point of view —gives us four species of selection, named as follows: Lethal selection. Sexual selection. Reproductive selection. Group selection. These terms, some of which are already familiar, are now to be defined. ‘ Selection, by usage, is both the process and the result. And of the parts or aspects of the result, it is both negative (elimination) and positive (survival). * Cf. “ Descent of Man,” sixth paragraph of Ch. VIII. 72 POPULAR SCIENCE MONTHLY Darwin thought of natural selection chiefly as the elimination of individuals by death. This is natural selection in the narrower sense. But it is better to avoid possible ambiguity by giving this kind of selection its distinctive name and separate treatment. It may appro- priately be called lethal, that is death-bearing selection. Lethal selec- tion, therefore, operates through the early elimination, or death, of relatively ill-adapted individuals. “Early” is here a relative term. Death operative by way of lethal selection occur either before physical maturity, or soon enough after to affect the amount of reproduction. Such death prevents the propagation of “ unfit ” characters. Sexual selection depends on the advantage which certain individ- uals have over others of the same sex and species in respect of mating, and thus of reproduction.* It is due to sexual preferences which favor the mating of certain individuals as against others of the same species, and so cause more reproduction of certain characters than of others; or, in another form, it is due to differences between individuals of the same species as regards power forcibly to appropriate mates. ‘The first of these may well be called esthetic, and the second combative, sexual selection. Failure to mate, not failure to survive, is the mode of elimination in sexual selection. The individual must become adapted to the phenomena of sex within the species, as well as to outside “nature.” “Selection in relation to sex” has an important part in Darwin’s theory of organic evolution. Among animals it is the relatively passive sex which exercises choice in esthetic sexual selection, that is, usually the female. Hence the beauty and song of birds are male attributes. In combative sexual selection, on the other hand, the competition takes the form chiefly of actual fighting between rival members of the active sex. There is a difference between this struggle for mates and the “struggle for existence.” “ Nature, red in tooth and claw” is poetic license. The phrase gives no true notion of the workings of natural selection. The poet is apparently licensed to be inaccurate. The struggle for exist- ence is chiefly a noiseless, inglorious effort to wrest from the environ- ment sufficient food to maintain life. For the rest, some animals prey and others are preyed upon. It is only in combative serual selection, however, that bloody combat, which implies a degree of equality of prowess, is the regular thing. It is significant, likewise, ° He says, for example, natural selection “ produces its effects by the life or death at all ages of the more or less successful individuals.” ‘“ Descent of Man,” last paragraph of the section entitled The Male Generally More Modified than the Female, Ch. VIII. ‘These are Darwin’s words, with the significant difference that he says “ solely in respect of reproduction.” See “ Descent of Man,” fourth paragraph of Ch, VIII. He thus fails to recognize what is called in this article reproductive selection, for his sexual selection is clearly a different thing. THE FORMS OF SELECTION 73 that the comparison of nature to a cock-pit uses phenomena, not of natural, but of sexual, selection. Reproductive selection depends directly on difference in degree of fertility. If any quality is generally associated with a particularly high or low degree of fertility, it is at an advantage or disadvantage due to this form of selection. Reproductive selection is the case of influences bearing directly on propagation, apart from obstacles to mating, in a way relatively to diminish or increase the number of off- spring from individuals possessing certain characteristics. The idea of reproductive selection is not developed by Darwin,’ though it is fully in accord with his general theory and supported by his emphasis on propagation. It has little applicability to the lower animals, but for man it has very great importance. Differences in ability to procure mates with resulting differences in number of offspring can be distinguished from differential results where the opportunity to mate and reproduce is equal. The former is sexual selection; the latter is reproductive selection. The two are related as pertaining to propagation exclusively, and are contrasted with lethal selection in that they do not involve the question of individ- ual survival. Reproductive selection is a phenomenon of the diverse results of equal opportunities for sexual intercourse. Sexual selection is a matter of obstacles to mating, that is to getting opportunities for sexual intercourse at all. The former rests on differences between individuals as regards degree of reproductivity, granted mating. The latter turns on differences in degree of ability to obtain mates. Though an element of each form may be present in a particular case of selec- tion, the distinction is important, especially in mankind. In order that the individual shall be “ selected ” in the fullest sense, he must successfully run a threefold gauntlet. He must live to maturity and enjoy a long and vigorous prime. In obtaining a mate, or mates, he must be as successful as the “ best ” of his fellows. He must also, equally with the most favored of his species, possess and exercise the power to reproduce his kind and to hand down his characteristics to a numerous progeny. If he fails in the first particular, he is eliminated by lethal selection. If he fails at the second point, his kind is elimi- nated by sexual selection. If he fails in the third respect, his kind is eliminated by reproductive selection. In all these three particulars his failure need not be absolute, but may be a matter of degree, in which case the elimination is gradual. He may survive to maturity, but perhaps little beyond that. He may leave offspring that are too few in number as compared with those of his fellows. The critical question ™The name and idea are contributions of Professor Karl Pearson. See his essay “ Reproductive Selection ” in his “ Chances of Death and Other Studies in Evolution”; also “Contributions to the Mathematical Theory of Evolution,” III., in the Philosophical Transactions of the Royal Society, Vol. 188, p. 253. 74 POPULAR SCIENCE MONTHLY always is: Whose descendants are to represent the future of the species? The question is one. But a decision may be rendered at any of several different points. The three forms of selection so far mentioned apply to individuals. Group selection is recognized by Darwin, though not treated separately, nor by him distinguished from natural selection. Group selection results where a number of individuals act and suffer jointly, whether with conscious purpose or not, in matters affecting their success and survival in competition with other groups.’ It is selection operating groupwise. We have distinguished three forms of selection of individuals, over against which is now set group selection. It may appear that we should make a triple division of group selection, as we have of the selection of individuals. It is obvious, however, that the concept of sexual selection is entirely inapplicable. A group does not propagate its kind by a sexual relation with another group. Reproduction, of course asexual, might be predicated of a group. The idea of repro- duction, however, as applied to the group, is but an analogy; and where so applied, it is of little or no significance for selection. Reproduc- tion of its individuals is not reproduction of the group, for the group remains the same while its members change, just as does the body while its component cells die and are replaced by others. The group is thus potentially immortal and does not regularly reproduce itself. When a successful group becomes unduly large, it may divide or send out a “ daughter colony,” thus, so to speak, propagating itself by fission. But this is a question of size, not of differences in degree of natural reproductivity on the part of groups. As regards the “ decease” of such a selectional group, moreover, it comes either by dissolution, that is, by the loosening of its bands and the dropping away of its members, or by their physical death. In the former case selection has not yet completed its work. In the latter case its work has taken an individual form. The ultimate incidence of group selection is always on individuals, affecting them either in the duration of their life or in their reproduction. But the effect is likely to be compound. From which of these two sorts of selection it comes, and how much is from one or the other form, are questions which have little importance from the point of view of the group. Therefore, if it is possible, it is not worth while, to attempt to subdivide group selection into lethal and reproductive forms. Group selection is logically coordinate with all three of the other forms. In practise, however, taking account of its degree of impor- tance, as well as of the fact that it is not to be subdivided, we may *In the choice of terms, I have preferred to name the kind of selection from its characteristic means at the decisive point. But I have not been able con- sistently to hold to this terminology in the case of group selection. THE FORMS OF SELECTION 75 treat it as on the same level with lethal, sexual and reproductive selec- tion, constituting a fourth species. It is repeating to say that successful reproduction of kind is the essential fact in selection. But the importance of the point is great enough to bear such a repetition. It is significant that Darwin got his idea from the practise of breeders of domestic animals, which is based upon the principle of reproductive selection. Lethal selection is more radical and more incisive in its methods, but death itself operates as a selective agency only through preventing reproduction. Elimination by death after the reproductive period is passed is not selectional. It merely makes more room for the new generation. Lethal selection comes through early death. It is probable that most animals die either when very young and immature or else after considerable reproduction. Survivorship tables for man exhibit the same general phenomenon, that is low mortality at the prime of life. Though we can not know ali the possibilities of selection until we distinguish the four modes, they are not independent explanatory principles. All are reducible to effective propagation of kind, to success in leaving offspring. The fate of the individual as such, counts for nothing. For selection, the con- tinuation or destruction of the line of descent is the thing. An individual is important only as belonging to or representing such a line of descent. The “struggle for existence” is only an incident, or a method, in selection. Selective propagation is what is essential. The classification above presented is made with reference to the needs and point of view of the sociologist. One might well doubt whether the careful discrimination of reproductive selection, which has been attempted, would be at all justified by the little scope of application it finds among the lower animals. We know that sexual selection also has but limited applicability, and only to higher forms of life. In strictness, reproductive selection has been the factor that has, on occa- sion, adaptively increased the fertility of a species, no matter how low in the scale; while natural selection must have been the means of adaptively decreasing such fertility. But this is a minor point. Sexual selection seems to be the nearest that nature comes to admitting reproductive selection as an important factor. As regards domestic animals, also, what the breeder controls is mating rather than strictly and directly reproduction. This case well illustrates the difficulty of sharply discriminating reproductive selection. In man, however, fer- tility is extremely variable, by nature and through artificial means, so that we must, in man, take account of sheer natality, apart from other selective factors.® It is significant that the point of view of ®* Perhaps it might be better, for this reason, to use the term “ natal sefec- tion” for what has been called “ reproductive selection,’ and reserve the latter for general use to cover both sexual and natal forms. But the term “ natal ” suggests germinal selection, and the idea of selection at birth or soon after would also be brought to mind, which is of course lethal selection. 76 POPULAR SCIENCE MONTHLY the sociologist is, in the matter of selection, more inclusive, and more exhaustive of selective possibilities, than that of the biologist. In our fourfold classification we have left out the term “ natural selection.” For its narrower, specific meaning “ lethal selection” is decidedly preferable. Might not the older phrase be used as the generic name for all the forms of selection? Usage seems to favor this. “ Selection,” without a qualifying adjective, is logically the generic term, but is not yet so established as to be unquestionable. Natural selection is therefore convenient as a make-shift or substitute general term. It is familiar, and all the forms of selection do occur in nature. So, despite the implication of Darwin’s practise in relation to sexual selection, natural selection might be used roughly for all four classes, though with a saving clause against including such a thing as purposive breeder’s selection. SELECTION APPLIED TO Man In the attempt to apply selection to man, clearness of conception has often been lost. Two sorts of mistakes have been made. The complexity of life in civilized society, as compared with the simplicity of nature’s conditions, has invited, on the one hand, to extensions of meaning, by which processes have been described as natural selection which are not selection at all. In particular, it has been supposed that segregation by economic or social success is selection. It is rather selective dissociation. This is an important preliminary to selection, but the incidence of the latter may as well be unfavorable as favorable to the survival of those who rise in the social scale. There are, on the other hand, sociologists who deny that natural selection, meaning by that lethal selection, is of much significance for man. Such are likely to develop and emphasize contrasts between natural selection and what they chose to call “ social selection.” This is a conception for which the writer finds little use. Social selection should mean selection by society, and since society, unlike “ nature,” is to some degree conscious and purposive, social selection should mean more or less conscious selection by society. Whatever selection there is of this sort may still be brought under one of our four forms. But there are more, and more important, non-teleological sorts of selection resulting from characteristically social processes. And such phenom- ena of selection im society are what those who talk of social selection have chiefly in mind. These are provided for in our classification, though in distinguishing types use has been made rather of the method of the selection. To attempt to distinguish forms of selection accord- ing to the varieties of selective conditions would give an almost endless list, and the differences would not be of explanatory or scientific importance. We may speak of military or religious or industrial selec- tion if we will, but these are descriptive terms rather than logical categories. This fact has not been perceived by those sociologists who, THE FORMS OF SELECTION 77 rightly departing from the rough and ready practise which calls almost anything natural selection, have wrongly gone on to find about as many different forms of selection as there are social institutions and customs.’° As regards the scope of selection in general in its application to man, we are now prepared to believe that any influence that bears in any of the four ways enumerated upon the continuance of lines of descent presumably has selective importance. Only on the hypothesis of pure chance distribution of effects can any influence known to affect propagation be declared to be non-selective. The chances against this are infinity to one. No enumeration can cover all possible selective agencies. Every habit, custom and institution of man.might well be examined with a view to detecting such effects. Selection must have tremendous importance in human society. It certainly is a central problem, perhaps the fundamental problem and point of departure, for a science of society. Only the confounding of selection in general with mere lethal selection can explain the opinion that selection is inoperative in human society. Even so, the opinion is not well-considered, for there is much selection by death in civilized man. Lethal selection is not a matter of violent death, or death in struggle. The conception of natural selection as the result of a “ free fight ”—a bellum omnium contra omnes—has no justification in any phase of its application. Half the population of many civilized societies, and of course on the whole the weaker half, dies before reaching maturity. In the parts of the United States for which tolerable registration statistics are to be had, at least one third of the deaths are of persons under the age of fifteen. This involves lethal selection. But lethal selection is not all. The forms and agencies of selec- tion multiply as we pass upwards in the organic series. Hence we might expect a culmination, as regards manifoldness and complexity, in man. It is true that there are fewer births to select from, but the selection may come before birth, and in fact comes so always in the last analysis. And if there is less selection by death in man, there is also less random and indiscriminate destruction of human than of lower animal or plant life. The field for the study of selection in human society is as great and as complex as that in which the biolo- gist works. Of lethal selection in its application to man, little more need be said. Life-tables and deaths according to age tell the story. Lethal selection is not to be dismissed with the statement that men no longer habitually attack and kill one another, and in civilized states do not die for want of food. Of course selection by the dissolution of the weaker constitutions relates chiefly to physical qualities, but its im- *” Lapouge, in his “ Les Selections Sociales,” perhaps best illustrates this tendency. 78 POPULAR SCIENCE MONTHLY portance for that is great indeed. Modern improvements in medicine and surgery may check the incisiveness of such action of selection. But they can only lower, not destroy, the standard set for survival. Lethal selection, however, even as regards mere physical qualities, amounts to much less for Occidental civilized man than for any other species of living thing. But some other species of selection are proportionately more important. A weightier consideration that might appear to make lethal selec- tion of less interest to the sociologist is the fact that it appears hardly to touch what is distinctively human in man’s constitution, that is, his mental and moral qualities. But such selection does in fact pro- mote mental stability, so far as the strain and stress of modern life drive men to insanity and death. Alcoholism, too, as is proved by the experience of life insurance companies, and by statistics of occu- pational mortality, tends to eliminate those who are in this respect deficient in self-control. In various ways the ignorant, the imprudent, and the vicious, tend to destroy themselves. The effects of sexual selection are much more deeply marked in the organisms of birds than among mammals. The sexes in civilized man, however, show pretty clearly its differentiating influence. The greater strength of the male in man is probably due in part to sexual rivalry. As regards women, on the other hand, their conventional title, the “ fair sex,” is probably due to something more than mere chivalry or mere flattery. The pretty girl still marries better or earlier than her less “ well-favored” sister. It is to be hoped that more important qualities than personal appearance are also favored by sexual selection. Alfred Russel Wallace, the co-discoverer with Darwin of natural selection, though he curiously enough grudges recognition of it as a factor in the evolution of lower animals, apparently because it involves rather highly developed mentality, sees in esthetic sexual selection on the part of women the great means to the future progress of the human species.‘ With this opinion, the writer can not agree. Mar- riage is not so much a result of exclusive and exacting “ elective affini- ties ” that the relatively ineligible can not solace themselves with those of the other sex who are similarly situated. The approximate equality of sex numbers and the institution of monogamy, which forestalls monopolizing tendencies, leave no considerable class of persons elimi- nated by lack of opportunity to marry. Postponement of marriage on this account is probably of some influence, but of no great im- portance. Postponement of marriage and abstinence from it—the latter amounting to more than one fifth in some regions—are prob- ably due to variation in the relative strength of the marital and repro- 11 See his article, ““ Human Selection,” in the Fortnightly Review, Vol. 54; also PopULAR ScIENCE MonrTHLY, Vol. 38. THE FORMS OF SELECTION 79 ductive tendency more often than to failure to find opportunity to marry. Sexual selection is probably still of some importance in man, though of problematic influence. Reproductive selection is by far the most important of selective instrumentalities operating in civilized man. Here, and very re- cently, it has first come to great importance. One sixth and more of marriages in certain portions of civilized society are infertile. And differences in the number of children to a family are still more sig- nificant. This absolute or relative infertility must be more or less selective in its incidence. Nerve-racking indulgences and ambitions suggested or elicited by civilized life seem to create physiological con- ditions unfavorable to reproduction. Still more important is the fact that, with the increase and spread of physiological knowledge, the size of the family is placed under the control of volition, and children are no longer a necessary or to be expected result of sexual gratification. So the wish not to be bothered with children, with the moral traits it implies, leads to elimination. Over-cautiousness and desire to pam- per children, on the other hand, resulting in the so-called “ two-child system,” bring about, though more slowly, the same result. The over- cautious in such matters certainly will not “inherit the earth.” Con- scientiousness on account of transmitting physical weaknesses acts in the same way. Celibacy as a religious observance has probably taken from society some of its gentlest natures.** An average of nearly four children to a family is necessary to keep up the numbers of a population. For a family to have fewer is likely to mean that it will have less representation in the next generation than in the present. Such a family is certainly not holding its own in a country of increasing population like the United States. Hence the plaint of “race suicide,” which is in fact never race suicide, but only the self-elimination of a particular section of society. The blood of France may become Breton, but it not at all likely that France will lose its population. The New England stock, which populated the West, is probably now declining in numbers in its old home by defi- ciency of natural increase.** But New England is gaining popula- tion. There are always relatively and absolutely fertile elements in society, as well as the relatively infertile. The significant thing is what are their differences as regards mental and moral traits. Is “ race suicide ” due more to selfishness or to over-caution? Is high fertility due more to improvidence or to the love of children? How far is a high standard of life associated with the most desirable mental traits? * Galton notices this selectional influence as early as 1869, in his “ Hered- itary Genius,” though of course without distinguishing it as reproductive selection. See articles of R. R. Kuczynski in the Quarterly Journal of Economics, Vol. XVI. 80 POPULAR SCIENCE MONTHLY Clearly reproductive selection is the most important selective influence in present social evolution. Men act and suffer jointly. Man is a social animal, and he is such through adaptation. Primitive man, like many lower animals, associates himself with others for mutual protection and support. Hence the strength of tribal attachment and of clannishness. To group selection chiefly is to be attributed capacity for cooperation and those feelings of regard for others on which morality is based. The attachment of mother and child is primeval and of course strongest. But the family, created by the presence of the father, is the earliest persistent, truly social group. Still more characteristically social is the bond of union between grown-up brothers and sisters. Out of kinship grouping has grown the broader, though vaguer and less in- tense, recognition of fellowship contained in morality. Morality has been called the egoism of the group. When developed and refined, it is much more than that, but it is based upon the instinct that draws men together. Group selection is probably at its best in primitive man. Bagehot’s classic discussion of the evolution of a coercive social organization is an application of group selection. But in modern occidental society the process of individualistic atomization has been carried so far as to threaten the disintegration even of the family. Large family, clan, tribe and village community are gone. There is left little but the individual, or the natural family, and the state. What “groups” there are between the state and the family are largely mere expres- sions of an appetite for association which finds no other and more important object upon which to exercise itself. And the state is of no importance for group selection. It has become a thing of con- trivance and a matter of social psychology. The family is the only group left that is of much selectional importance. Of progressive national states there are too few, in the face of the many questions to be answered, to offer the necessary material. And they inter- penetrate by migration in a way to defeat selection groupwise. Selective dissociation is so closely related to selection, and so often confounded with it, that it requires mention here. There is selective dissociation where individuals of more or less similar traits are segre- gated from others and put into a special environment of a nature to affect their survival.‘* The incidence of the forms of selection varies with geographical region and social class. The process of dissocia- tion is not directly selection, but only indirectly important as its preliminary. Economic and social rise has been mentioned as often confused with “survival.” Survival it is not, but merely selective dissociation “The term “ dissociation” is used by C. C. Closson in articles in the Quar terly Journal of Economics, Vols. X. and XI. THE FORMS OF SELECTION 81 of those possessing traits making. for success. It probably means se- lectional disadvantage, owing to the heavy incidence of reproductive selection on “ successful ” families. International migration to a new country is another case of select- ive dissociation. The American colonists were undoubtedly, on the whole, men of superior initiative and independence of character. Their coming to America made possible the multiplication of their descendants and their kind. Even our present-day immigrants are rather superior in point of energy to those of the same economic con- dition who remain behind, and they come to an environment present- ‘ing greater opportunities. Urban migration is a notable example of selective dissociation. According to the indications of anthropological and other evidence, it is the more energetic element that migrates from country to city. Under conditions prevailing down into the nineteenth century, cities could not maintain their population by natural increase. Migration to the city then meant subjection to an unusually severe incidence of lethal selection. Our modern sanitary improvements have not yet entirely removed the disadvantage of the city as compared with the country. We have mentioned selection by society as possible, but not a very important fact. The execution of criminals and their imprisonment, so far as it prevents reproduction, are cases of such selection. In crueller ages, with numerous capital crimes and many executions a year, this may have been an important mode of selection. Now it amounts to little. Perhaps public opinion, also, puts certain mem- bers of society under some selective disadvantage. Francis Galton has proposed that society deliberately undertake the improvement of the human stock.1* He would have certificates of fitness issued and suggests the giving of marriage portions to girls of superior personal qualities and good family. Such a program of “eugenics ” would operate through reproductive selection. It is an interesting proposition, if not very practical. Hitherto the method of evolution has been essentially negative, that is, primarily the elimina- tion of the unfit. Will any human society ever be wise enough posi- tively to map out the line which further evolution shall take? The definition of what is undesirable is much simpler than the definition of what is most desirable. In the above brief review of the incidence of selection in man, it has been the intention of the writer merely to give examples illus- trative and suggestive of the applicability and importance of the dif- * POPULAR SCIENCE MonTHLY, Vol. 60, article at page 218. He has also brought up the subject before the British Sociological Society. Reports of the discussion are printed in recent volumes of the American Journal of Sociology, as well as in the society’s Sociological Papers. 82 POPULAR. SCIENCE MONTHLY ferent forms of selection for the study of man and his social evolution. An extended treatment of this subject is one of the great desiderata of the science of sociology, the half of which will be the theory of selection in its application to man. A logical and seemingly very forcible objection to the idea that selection applies to man is contained in the contention that heredity has nothing to do with the higher, which are the distinctively human, qualities in human nature. But the common-sense and practical view is that even the highest intellectual and moral qualities are to some extent inheritable. Men look for family traits not merely in the physical features of children. There is certainly a tendency to the inheritance of insanity, which shows that mind is subject to heredity. It is enough for the purposes of the sociologist if the inheritance of the properly human qualities be only statistically true, that is, true for the mass, though not true of every individual. In fact, this is what we should expect. For a number of reasons variation should be at its best in characteristics distinctively human. Biologically viewed, man is like a domestic animal and is a dominant species, both of which facts imply great variability. There is also approximately unre- stricted crossing in mankind. The environment, that is complex civi- lized society, demands diverse specialized qualities; so that the external conditions favor multilinear evolution. The distinctively human qual- ities have been latest acquired and are therefore most subject to varia- tion. In man, moreover, as the most socialized of animals, much may be left to imitation and education, that is, to “ social heredity.” Hence there is less need of a hard and fast physical heredity. The fact that the line of least resistance in development is the resultant of two sets of forces, internal (variation and heredity) and environmental (selection), must not be allowed for an instant to slip the mind. The interdependence and delicacy of adjustment between these forces increases with the complexity of man’s higher, special characteristics. Hence the apparent decrease in the importance of heredity. The distinction between what is innate and what is acquired often hinges on mere ease of enumeration of cases of apparent pre- dominance, or relative independence,. of one or the other factor. Or the results are referred to the least easily assumed to be constant factor. Such is in practise man’s application of causation. Both sorts of factors are always necessarily operative. It must be granted that proper inheritance is a necessary precondition to the appearance of noble qualities, and this alone concedes the presence and importance of heredity. Both internal constitution and modifications from with- out are determinants of development and man can no more get along without the right sort of heredity now than ever. Complexity and lack of fixity in development do not remove from the sphere of hered- ity, though they do mean greater possibilities and greater likelihood THE FORMS OF SELECTION 83 of variation. They do also give opportunity for the development of a new set of factors in evolution, the socio-psychical. It can not be too strongly emphasized, however, that these socio-psychic factors are conditioned by their’ foundation in the innate qualities and capacities of human nature, that is, in the characters given to men by selection. It may be that the power of heredity is limited short of the powers of evolution and development. But this does not seem to be true for the higher moral qualities, nor for conspicuous intellectual power, though it is perhaps well to add the caution that heredity appears to be not yet thoroughly established for these qualities. But selection itself can make heredity more stable. It would be enough for the most utopian sociologist if all human beings could be brought up and kept up, by the fixation of heredity, to the present highest level of ‘intellectual power and moral character. So much progress selection may accomplish. Whether it does, depends on the adaptation of human institutions to such remote ends. The question as to the applicability of natural selection to man can not be satisfactorily dealt with as one simple whole. Here as elsewhere analysis is the necessary instrument of science. By analysis we discover four distinct modes of selection: lethal, sexual, reproduc- tive and group selection. We find, also, that these four forms have very different sorts of applicability in the explanation of man’s evolu- tion, past and present. Especially under present conditions it is re- productive selection that most calls for consideration. In these days “race suicide ” is a much talked of subject. There is plenty of occasion for the discussion. But the fact that attracts attention is not rightly called race suicide. Literally interpreted, race suicide is an absurdity. The actual fact that is attracting attention is a phase of reproductive selection. Its importance can hardly be exaggerated. But it can be truly evaluated only as seen in its setting as a phase of a form of selection. The fear of race suicide as a matter of quantity of population is no more valid or justifiable—it is rather far less justifiable—than the contrary and equally unanalytic fear of over-population awakened in Malthus and his followers a century ago. The question is not so much one of quantity, either by excess or defi- ciency, as of quality of reproduction and of population. It is there- fore a question of selection.. In this matter of selection in mankind it is doubtless true that “ race suicide ”—if the term means the self- elimination of certain classes of members of society—now plays the most significant part. 84 POPULAR SCIENCE MONTHLY ILLUSTRATIONS OF MEDIEVAL EARTH-SCIENCE Dr. CHARLES R. EASTMAN HARVARD UNIVERSITY C’est vers le Moyen Age énorme et délicat, Qwil faudrait que mon ceur en panne naviguat. —PAUL VERLAINE. VE experimental science dates only from the sixteenth cen- tury. ‘The habit of interrogating nature, the application throughout all departments of research of the observational and in- ductive methods, the thirst for fresh discovery and invention, and the irrepressible curiosity that inquires into the innermost recesses of the wonderful world we live in, seeking to ascertain its laws and acquire mastery over its forces—all these leading characteristics of modern science were absent from its medieval prototype. In reality, the so-called science of the middle ages is scarcely worthy of the name. Infinitely inferior as compared with modern science, it was still more crude, more distorted, more fantastic and illusory than that of ancient times. Medieval man had no clear-eyed perception of the visible world, actuality possessed for him little value, that which really is and happens was without special significance in his eyes. What the medieval man saw he interpreted as a symbol, what he heard he understood as an allegory. Dante himself is our best witness that cultivated men of his age esteemed the speculative hfe vastly superior to the practical. Under the conditions of hopeless barbarism that existed from the seventh to the eleventh century there could be no real culture, and intellectual activity continued at an extremely low ebb. Religion absorbed almost all other occupations of the mind, faith was exalted as a sovereign virtue, mere empirical knowledge was disdained and rejected. As the Christian religion became the leading subject of men’s thought and interest, so the principal business of their lives throughout the middle ages was the salvation of their souls. External conditions were unpropitious, subjective conditions inhibitory for the development of scientific ideas. Hence it was inevitable that learning should become decadent, and the proud record of ancient achievement forgotten. Indeed, as early as the fourth century of our era, before all relics of the old culture had disappeared, Eusebius wrote: It is not ignorance which makes us think lightly of science in general, but con- tempt for its useless labor, while we turn our souls to better things. MEDIEVAL EARTH-SCIENCE 85 Two centuries later Pope Gregory the Great protested against the study of pagan literature, because the praise of Christ and the praise of Jove are not compatible in one mouth. Again in the tenth century, a period of utter stagnation, illumined by scarcely a ray from classical antiquity, church dignitaries maintained that the successors of St. Peter wish for their teachers neither Plato nor Virgil, nor Terence, nor any other of the philosophic cattle. But with the revival of learning during the next two hundred years came a change for the better, and medieval knowledge began to assume a more positive character. Its science, still contaminated with the errors and superstitions it had received from remote ages, gradually became less chaotic, less fantastic and symbolic, less dominated by theology, although for a long time after its subjection to scholastic influences it remained, so to speak, Aristotelized. That is to say, logical analysis was relied upon for ascertaining all manner of truth, a complete system being devised toward that end by Raymond Lull. The independent searching out and testing of actual facts, the process of drawing general conclusions from concrete phenomena, were not the methods employed by medieval schoolmen, with the one notable exception of Roger Bacon.t It was commonly held that all truth may be obtained by the use of reasoning alone; and “ that by analyzing and combining the notions which common language brings before us, we may learn all that we can know. ‘Thus logic came to include the whole of science.” (Whewell.) There can be no doubt that the universal reverence for Aristotle’s authority, and blind acceptance of other accredited doctrines and treatises, greatly retarded scientific progress. All men begin their development with a childlike trust in authorities and examples, and as science had to be regenerated de novo toward the end of the middle ages, it is only natural that its beginnings should appear to us lament- ably weak and puerile. Moreover, the system of instruction employed by Catholic schoolmen was not conducive to real enlightenment. The real difficulty, as has been pointed out, is that “not life and nature were the basis of instruction and science, but books. Not the thing itself was the object of inquiry, but the word; not experiment disclosed the truth, but dialectics.” Authority had greater weight than argu- ments, and in the last resort authority depended more upon a master’s reputation than on his knowledge. Finally, we must not forget the restraint imposed upon medieval philosophy by theology. Religious discipline required that the results of human reason should be con- *On Baconian contributions to science, see Professor Holden’s interesting article in PopuLAR ScIENCE Montutiy for January, 1902 (60: 255). 86 POPULAR SCIENCE MONTHLY formable to church dogmas, and woe to him who dared insinuate that whatever was taught by the church was not also the logical outcome of human reasoning. Thus, freedom of the intellect had to contend not only with formid- able difficulties imposed from without, but with no less effective hindrances, wrong conceptions and limitations that came from within. While these conditions lasted the net result was sterility. In time, however, that innate longing to escape the bonds of ignorance, that patient and zealous striving after truth which stimulates all lofty en- deavor, these impulses gradually became more assertive; and, tri- umphant at last, gave rise to our modern critical science. It would be impossible to attempt here even a superficial sketch cf the remarkable rise and expansion of empirical knowledge that took place during the twelfth and thirteenth centuries, by virtue of which Dante’s era merits its appellation of secolo d’oro. The innu- merable commentaries that have been devoted to the most striking figure of the middle ages attest the difficulty of preparing an adequate survey of contemporary knowledge. Remember, too, that the peerless poet stands out from the midst of a notable company of erudite laymen and clerical scholars. It will be sufficient to recall only such names as those of Ser Brunetto Latini, whom Dante expressly calls his ‘ master,’ and whose encyclopedic work embraces practically all the science of his time; Albertus Magnus, often styled the “ Universal Doctor,” and his famous disciple, St. Thomas Aquinas; those brilliant Anglican geniuses. Roger Bacon and William of Ockham, forerunners of the modern spirit of investigation; and those twain Italian luminaries whose souls were fired with the glow of ancient and of the newly revived culture, Petrarch and Boccaccio. Still earlier, and entirely independent. of Christian influences, the Arabian circle of sciences had gained new luster from Averroés, its chief exponent and adornment. But. besides these greater lights there shone many of feebler in- tensity, yet none the less worthy of grateful esteem, since their combined rays helped toward clearness of vision. There was one erudite scholar, for instance, who was formerly rated as a mere imitator and plagiarist of Albert of Bollstiidt; whereas we now know that the reverse was true, in that the master drew largely upon his disciple for materials in preparing his huge compendium on natural history. This was Thomas of Cantimpré, who wrote during the third and fourth decades of the thirteenth century, and whose works were widely read and translated. His chief contribution to science was a treatise entitled “ De naturis rerum,” which served at once for the source and model of Conrad of Megenburg’s “ Buch der Natur,” the earliest of its kind to be written in the German vernacular.* Conrad, however, considerably amplified the work of his Brabant MEDIEVAL EARTH-SCIENCE 87 predecessor, and is further interesting to us for displaying power of original observation. He had also the happy faculty of meditating upon his observations, and was by no means averse to offering his own explanation of the causes of various phenomena. Accordingly, it has seemed worth while to reproduce a passage from this author relating ALBERTUS MAGNUS. to earthquakes, for the reason that it offers a very fair presentment of the status of geological speculation among medieval schoolmen. The second illustration has been selected with similar intent from the “ Cosmography ” of Ristoro of Arezzo, written in 1282. Dante’s ac- quaintance with Ristoro’s work has not been definitely proved, but is regarded by competent authorities as highly probable. 24 modern German edition of the text was published by H. Schulz in 1897. The most recent study of Thomas Cantipratanus is by a Dutch author, Dr. W. A. Van der Vet, entitled “ Het Bienboée van Thomas van Cantimpré,” 1902. 88 POPULAR SCIENCE MONTHLY ON THE NATURE AND CAUSES OF EARTHQUAKES (Extract from Conrad of Megenburg’s “ Buch der Natur,” 1359) The fourth and nethermost element is the sphere of earth. Its distance from the firmament [of the fixed stars], as determined by divers*scientific men, both pagan and Christian, is 309,375 miles. No one can impugn the accuracy of this result, depending as it does upon laborious calculation and the reduction of very delicate astronomical observations. None but unlettered folk contemn such investigations. Ignorant persons are unable to comprehend that a geometer may sta- tion himself outside the town and accurately determine the height of turrets within the town by means of angular measurement. Yet in sooth is it possible. By a similar method we ascertain the distance from earth to the starry heavens. The earth is the only one of the four elements that is favorably adapted for man; it is peculiarly his province, as heaven is the habita- tion of God and the angels. The earth element alone is innocuous to man, the others often injure him. For water drowns, foul air suf- focates, and fire consumes him. The earth is by nature cold and dry, externally harsh, yet concealing within its bosom full many beauteous things, such as precious stones and the noble metals. By a like token, many an humble citizen may possess jewels within his heart. The earth-realm is very luxuriant, and the only one that brings forth fruit in abundance. How many miles it measures in circumference, and the extent of its diameter, I have already set forth in another place,* and likewise have explained the cause thereof, why it does not fall away from its abode in space. As the heart is lodged within the mid-portion of the body, so is hell seated at the center of the earth. Thus do our reverend masters instruct us.* Oft it happens that the earth trembles, causing cities to fall, and mountains to crash together. Simple folk know not the reason of this, but foolishly believe that the earth is borne up by a mighty fish, which carries his tail in his mouth; and the turning or moving about of this creature causes the earth to shake. But this isa myth.® Remains for *Conrad’s data as to the dimensions of the earth and its distance from the several heavens are possibly derived from the same source as Dante’s and Brunetto Latini’s, namely, the Elementa Astronomica of Alfraganus, cap. XXi. Roger Bacon’s calculation of the earth’s circumference was only one-fourteenth smaller than the truth, and Ristoro’s independent reckoning of the latitude of Arezzo, in 1282, was in error to the extent of little more than one degree. *S. Thomas Aquinas teaches with regard to hell that it is probably situated under the earth and that its fire is of the same kind as terrestrial fire, an ignis corporeus. (Summa theol., Suppl., Pars iii., Qu. 97.) ® Probably an echo of ancient Titan myths, though having affinity also with the Arabian voyages of Sinbad. The existence of a great sea-monster was a very popular legend in the middle ages, the creature being sometimes identified MEDIEVAL EARTH-SCIENCE 89 us to give true relation of this marvel, and to explain the cause of its occurrence. Now earthquakes originate in this manner, that within subterranean cavities, and especially in the interior recesses of moun- tains, vapors are compacted together in such vast quantities, and under such tremendous pressure, as to exceed at times all means for restrain- ing them. They crowd in all directions against the walls of the in- terior caverns, fly from one to another of them, and continue to aug- ment in volume until they have surcharged an entire mountain. The increase of these vapors is occasioned by the stars, especially by Mars and Jupiter. When now the vapors are confined for a long period within the subterranean cavities, their pressure becomes so prodigious that they burst forth with enormous violence and rend mountains asunder. Even when they fail to break completely through the crust they are yet able to produce a severe shock. There are two kinds of earthquakes. Those of the first sort cause a gentle swaying of the ground lke the rolling of a ship at sea. This movement is least destructive of fortresses and houses. The reason for this is that the vapors upheave the crust in a single supreme effort, and thereupon relapse in energy. Disturbances of the second sort are those which produce tremblings of the crust by means of a succession of sudden shocks, the motion being comparable to that of hand-shaking. Their effect upon buildings is most disastrous, solid masonry being shattered and hurled down by them. ‘The process involved in this class of earthquakes is that one vapor rushes in pursuit of another, and drives it violently from side to side. That the causes are verily as we have described is supported by abundant evidence. First, when a catastrophe is about to happen, pre- monitory rumblings are heard that resemble nothing so much as the noise of an hundred thousand hissing serpents, stridulating in chorus; or again there may be bellowings like unto those of maddened bulls. These sounds proceed from the violent agitation of the vapors within the interior of the earth, forcing their way through crevices and struggling to become liberated. Secondly, the sun shines feebly, or appears reddish-hued by day, owing to the heavy pall of smoke that rises from the earth’s surface and obscures the view. Thirdly, it is well known that immediately after an earthquake the air becomes virulent, so as Cetus (the whale), or the Craken of the north, or again merely as a gigantic fish. In the bestiary of Philippe de Thaun the incident is given in a few lines beginning: “ Cetus ceo est mult grant beste, tut tens en mer converse, Le sablun de mer prent, sur son dos l’estent.” fhe monster reappears under the name of Jascom or Jasconius in the old Celtic legend of st. Brandan: “ Jascom he is i-cleped, and fondeth nite and dai To putte his tail in his mouth, ac for gretnisse he ne mai.” go POPULAR SCIENCE MONTHLY that many people die. The reason for this is that when the vapors have been confined for a long time underground they become fetid and noxious. The same thing happens in wells that have long remained foul and choked up, for when these are again opened for cleansing purposes, the first workmen to descend into them are often asphyxiated. Many wondrous effects are wrought by earthquakes. Note first that the vapors escaping at such times frequently transform men and beasts into stone, especially into rock-salt, and this is very liable to _ happen in mountainous regions or in the vicinity of salt-mines. This lapidifying property of the vapors is due to their enormous condensa- tion. So affirm the eminent doctors of science. And I myself have heard it reported that high up in the Alps as many as fifty neatherds with their beeves were turned to stone in this manner; with them also was a dairymaid engaged in drawing milk, and transfixed in that atti- tude at the selfsame moment when all were petrified. Note secondly that earthquakes are often accompanied by flames and glowing ashes which shoot up from below and ignite houses, villages and towns. Yet a third accompaniment of earthquakes is the belching up from below of vast quantities of sand and dust, sufficient to engulf whole cities. CONCERNING THE PROCESSES OF MOUNTAIN FoRMATION (From Book VI., Chapter 8, of Ristoro d’Arezzo’s “ Composizione del Mondo,” 1282) And we have ourselves discovered and excavated near the summit of an exceedingly high mountain remains of numerous species of fish and other creatures, such as various members of the shark tribe, and even shells that had retained traces of their original coloration. And in the same locality are found also different varieties of sand, gravel, water-worn pebbles and boulders scattered about in great profusion, apparently deposited by aqueous agency: and this we consider proof that the mountain in question was formed by the flood. And we have at another time ascended a lofty mountain whose summit was composed of a thick stratum of very hard rock, of fer- ruginous color, and whose structure was as clearly the work of design as a vase is evidence of the potter’s art. A huge castle, almost a citadel in fact, rested upon cliffs of this formation, and all the strata out- cropping at that altitude reposed upon other beds that had plainly been formed by water action. And the proof thereof consists in this, namely, that as one examines the strata exposed along the flanks of the mountain, one finds in certain places earth commingled with sand, at others tufa along with stones rounded by water action, and again elsewhere, quantities of fish remains belonging to various species, and also numerous other beds of divers kinds; all of which proves that this particular mountain, and the others already mentioned, near MEDIEVAL EARTH-SCIENCE gI whose summits occur fish remains, were formed by the deluge. Yet this same catastrophe may very readily have formed other mountains which do not contain sand and fish remains, the difference being occa- sioned by the nature of sediments existing in particular localities. Such, then, is the process of mountain-making. And the reason why mountain chains must have been formerly sea-bottom, or deposited in marine basins [before their upheaval], is that the volume of fos- siliferous and arenaceous sediments is far too considerable to be as- cribed to the agency of rivers, or of any other body of water inferior to the sea itself... . [ The continuation of this passage is devoted to seismic and volcanic phenomena, which are discussed more particularly in a subsequent sec- tion (Distinzione vii. parte iv.). The author expresses himself upon these questions, as well as upon the meaning of fossils, erosive action of water in molding land surfaces, scintillation of the stars, etc., in eminently scientific manner. His elder contemporaries, Albertus Magnus and Vincent of Beauvais, also note the existence and teaching of fossil remains. Similar inferences are drawn by Cecco d’Ascoli, the ill-fated author of l’Acerba and envious rival of Dante in the latter part of the thirteenth and first quarter of the fourteenth century. ] g2 POPULAR THE PROGRESS OF BENJAMIN FRANKLIN AND THE AMERICAN PHILOSOPHICAL SOCIETY THE celebration of the two-hundredth anniversary of the birth of Franklin, held at Philadelphia last year under the auspices of the American Philosophical Society, has now been completed by the publication of a volume containing a full account of the proceedings. These proceedings were unusually impressive. The Pennsylvania legislature made an appropriation of $20,000, and all the arrangements were carried out with ad- skill the of the society. The commemorative addresses by Dr. H. H. Furness, President Chas. W. Eliot and the Hon. Joseph H. Choate are models of thought and expression. mirable by officers A special session was held to honor Franklin’s researches in electricity, when addresses were made by Professor K. L. Nichols Ernest Rutherford. It is not necessary to re- peat here all the features of the pro- and Professor gram, but attention may be called to | circumstances which give opportunity to reproduce from the volume two in- | teresting portraits of Franklin. BRINE “> LEN SCIENCE MONTHLY SCIENCE At the instance of the committee of the society, the congress passed an act en- abling the secretary of state to have to two-hundredth anniversary of the birth struck a medal commemorate the of Franklin, one single impression in gold to be presented to the Republic of | France and one hundred and fifty copies in bronze to be distributed by the presi- dent of the United States and the Amer- ican Philosophical Society. The medal, designed by Louis and Augustus St. Gaudens, has under the face of Frank- lin the words “printer, philosopher, scientist, statesman, diplomatist,” while on the reverse history writes in the presence of Literature, Science and Phi- losophy. This medal was presented by the secretary of state, the Hon. Elihu Root, and accepted by his excellency the French Ambassador, M. Jusserand. The occasion of the Franklin bicen- tenary was taken by Lord Grey to pre- sent to the United States a portrait of Franklin painted in London in 1759 by Benjamin Wilson. This portrait hung in Franklin’s house in Philadelphia, whence it was taken by Major André |} and given by him to the great grand- THE FRANKLIN MEDAL. THE PROGRESS OF SCIENCE PORTRAIT OF FRANKLIN PAINTED BY BENJAMIN WILSON IN 1759. father of Lord Grey. In the letter, read by the Hon. Joseph Choate, when | the portrait was first shown after its return to this country, Lord Grey says: written 1788, to * Our In a letter from Franklin, from Philadelphia, October 23, Madame Lavoisier, he says: English Enemies, when they possession of this city and my home, | made a prisoner of my portrait and ear- ried it off with them.” As your English friend, I desire to give my prisoner, after the lapse of 130 years, his liberty, and shall be ob- liged if you will name the officer into whose custody you wish me to deliver him. If agreeable to you, I should be | much pleased if he should find a final were in| resting place in The White House, but I leave this to your judgment. POPULAR SCIENCE MONTHLY BRIDGE OVER THE BRONX RIVER, BETWEEN THE NEW YORK FPOTANICAL GARDEN AND THE NEW YORK GEOLOGICAL PARK, DEDICATED TO THE MEMORY OF LINN®US THE CELEBRATION OF THE BI- CENTENARY OF THE BIRTH OF LINNAAUS BY THE NEW YORK ACADEMY OF SCIENCES THE two-hundredth anniversary of the birth of Carolus Linneus has been celebrated throughout the world, notably by the Royal Uni- versity of Upsala, where he was professor from 1741 to his death in 1774, and the Royal Swedish Academy of Sciences, of which he was the first president. Of the many local celebra- tions, we may select for mention that under the auspices of the New York Academy of Sciences, where the ar- rangements were more elaborate than elsewhere in America. The morning of | erection, Mr. F. A. Lucas and others. The building of the New York Aquarium commemorated the centennial of its and the collections opened for the first time by night. were Of special interest was the dedication to the memory of Linnzus of a bridge over the Bronx River on Pelham Park- way between the New York Botanical Garden and the New York Zoological Park. The bronze tablet, presented by Dr. N. L. Britton for the New York Academy of Sciences, bears these words: Linnus, botanist and zoologist, born Ra- shult, Sweden, May 23, 1707; died Hammarby, Sweden, February 18, 1778. This bridge was dedicated by the New York Academy of Sci- | ences, May 23, 1907. May 23 was devoted to exercises in the | American Museum of Natural History, the afternoon to exercises at the New York Botanical Garden and the New York Zoological Park, the evening to exercises in the Brooklyn Institute of Arts and Sciences and the New York Aquarium. At these different scien- tific institutions addresses were made by Dr. J. A. Allen, Dr. P. A. Rydberg, A the New York Academy of Sciences by the cable message addressed to Swedish Academy reads as follows: To every Swede, and especially to our so- ciety, whose honor it is to count Carl von Linné as the greatest ornament of its ranks, it is highly gratifying to see that the memory of the man whom all the world recognizes as Princeps Botanicorum is also held so sacred across the Atlantic that the two hundredth anniversary of his birth will be celebrated there with the same love and reverence as in his own country. And we fully appreciate the delicate courtesy which has led you to immor- THE PROGRESS talize his name among you by dedicating to him the beautiful bridge which unites your Botanical Garden with the Zoological Park. THE STATE UNIVERSITIES AND THE SYSTEM OF RETIRING ALLOWANCES OF THE CARNEGIE FOUNDA- TION In Mr. Carnegie’s original letter giv- ing $10,000,000 to establish a fund for pensioning professors, denominational institutions, on the one hand, and state institutions, on the other, were excluded. In the act of incorporation, however, the question of the state insti- tutions was left open, and it was at one time reported by the newspapers that Mr. Carnegie would add five million dollars to the foundation in order that they might be included. But it now appears that the opposite policy will be followed. The documents on the subject presented to the trustees have been printed as a bulletin of the Car- negie Foundation. This bulletin, in ad- dition to giving the grounds that have been urged for and against the policy of granting pensions to professors in the state institutions, contains some in- teresting data in regard to the develop- ment of these institutions. The executive committee of the Na- tional Association of State Univer- sities drew up a statement for the trustees in which they urge the follow- ing reasons for including these universi- ties under the auspices of the fund: State universities are not controlled by religious denominations; they maintain college standards based on the high school; they have an assured income equal to the productive endowment re- quired for private foundations; state institutions can not establish a pension fund as this might raise the whole | question of pensions for state officers; the omission of these institutions dis- criminates against the professors who have served them; the plan would not weaken support by the states. Memo- randa in favor of granting allowances OF SCIENCE 95 | were also presented by Dr. Maurice Hutton, acting president of the Uni- versity of Toronto, and by Professor Henry T. Eddy, dean of the graduate school of the University of Minnesota. _ Dr. Henry 8. Pritchett, president of ‘the foundation, discusses these papers, and comes to an adverse conclusion. He holds that from the point of view of general policy, professors in the state institutions should receive retiring allowances, but that these should be established by the states themselves, as the granting of allowances by a private ‘agency might lessen the sense of re- sponsibility of the states for educa- tional support. He states that to add to the list of accepted institutions all state universities would be to complete the list of institutions for which the foundation can provide an adequate retiring system. He holds that the award of pensions to a large number of representative institutions by the foundation will make the plan part of the American Educational which other institutions sarily follow. It may be that in this matter the trustees of the Carnegie Foundation, nearly all of whom are presidents of | private institutions, are not entirely disinterested. Some of them have given occasion for such inference by their attitude toward a national uni- versity, which Mr. Carnegie at one time planned to endow. In the establishment of libraries, Mr. Carnegie has not been indisposed to System, will neces- cooperate with insti- tutions supported by taxation. How- ever, it does not follow that in the end it would have been to the advantage of the state institutions to have been placed under the Carnegie Founda- tion. There are dangers, as well as advantages in centralization and uni- formity. It by no means follows that compulsory retirement at sixty-five, on part salary plan. Perhaps the state may adopt the German the age of is the best universities system, by 96 POPULAR which the appointment of a professor | is for life, he being excused from ac- tive service when disabled by illness or | old age. SCIENCE MONTHLY Agassiz was unveiled under the aus- pices of the American Association for the Advancement of Science with brief _addresses by Dr. Charles D. Walcott, secretary of the Smithsonian Institu- SCIENTIFIC ITEMS We record with regret the deaths of Sir Benjamin Baker, F.R.S., the emi-| nent british engineer; of Dr. Alex- | ander Buchan, F.R.S., the Scottish | meteorologist; of Sir Joseph Fayrer, known for his pathological work in India, and Dr. Charles Féré, known | for his researches in neurology and | psychiatry. | THE honorary freedom of the City of London is to be conferred on Lord Lister.—The gold medal of the Lin- | nean Society, London, has been awarded | to Dr. Melchior Treub, director of the Botanical Garden at Buitenzorg. A SECOND series of tablets was un-) veiled in the Hall of Fame, of New) York University, on Memorial Day, | May 30. Addresses were made by) Governor Hughes, of New York, and) Governor Guild, of Massachusetts. Among the twelve tablets unveiled was one in memory of Maria Mitchell, the astronomer, and one in memory of. Louis Agassiz. The tablet in honor of | elected, as follows: tion, and Dr. Edward S. Morse, director of the Peabody Institute of Science. THE committee of one hundred, ap- pointed by the American Association the Advancement of Science to further the promotion, of national in- in health, met in New York for terest City, April 18, and organized by the adoption of rules, the election of officers and the appointment of an executive committee. Professor Irving Fisher, of New Haven, presided as the temporary chairman and was subsequently elected president. Ten vice-presidents were President Charles W. Eliot, Harvard University; Dr. Felix Adler, New York; Dr. William H. Welch, Baltimore; Rev. Lyman Ab- bott, New York; President James B. Angell, University of Michigan; Miss Jane Addams, Chicago; Hon. Joseph H. Choate, New York; Rt. Rev. John Ireland, St. Paul; Hon. Ben. B. Lind- sey, Denver; Hon. John D. Long, Bos- ton. as oa Be i Oee WA es © een. C5 NEO IN Ea AUGUST, 1907 THE PROBLEM OF AGE, GROWTH AND DEATH By CHARLES SEDGWICK MINOT, LL.D., D.Sc. JAMES STILLMAN PROFESSOR OF COMPARATIVE ANATOMY IN THE HARVARD MEDICAL SCHOOL II. CytromorPHosis. THE CELLULAR CHANGES OF AGE Ladies and Gentlemen: I endeavored in my last lecture to picture to you, so far as words could suffice to make a picture, something of the anatomical condition of old age in man, and to indicate to you further that the study merely of those anatomical conditions is not enough to enable us to understand the problem we are tackling, but that we must in addition extend the scope of our inquiry so that it will include animals and plants, for since in all of these living beings the change from youth to old age goes on, it follows that we can hardly expect an adequate scientific solution of the problem of old age unless we base it on broad foundations. By such breadth we shall make our conclusion secure, and we shall know that our explanation is not of the character of those explanations which I indicated to you in the last lecture, which are so-called ‘ medical,’ and are applicable only to man, but rather will have in our minds the character of a safe, sound and trustworthy biological conclusion. The problem of age is indeed a biological problem in its broadest sense, and we can not study, as we now know, the problem of age without including in it also the con- sideration of the problems of growth and the problems of death. I hope to so entice you along in the consideration of the facts, which I have to present, as to lead you gently but perceptibly to the con- clusion that we can with the microscope now recognize in the living parts of the body some of those characteristics which result in old age. Old age has for its foundation a condition which we can actually make visible to the human eye. As a step towards this conclusion, I desire to show you this evening something in regard to the microscopic struc- ture of the human body. VOL. LXXI.—1 98 POPULAR SCIENCE MONTHLY We now know that the bodies of all animals and plants are con- stituted of minute units so small that they can not be distinguished by the naked eye, although they can be readily demonstrated by the microscope. These units have long been known to naturalists by the name of cells. The discovery of the cellular constitution of living Fic. 3. CELLS FROM THE MoutH (ORAL EPITHELIUM) OF THE SALAMANDER, to SLOW the phases of cell division or mitosis. bodies marks one of the great epochs in science, and every teacher who has had occasion to deal in his lectures with the history of the bio- logical sciences finds it necessary to dwell upon this great discovery. It was first shown to be true of plants, and shortly after likewise of animals. The date of the latter discovery was 1839. We owe it to AGE, GROWTH AND DEATH 99 Theodor Schwann, whose name will therefore ever be honored by all investigators of vital phenomena. What the atom is to the chemist, the cell is to the naturalist. Every cell consists of two essential parts. There is an inner central kernel which is known by the technical name of nucleus, and a covering mass of living material which is termed the protoplasm and constitutes the body of the cell. I will now call for the first of our lantern slides to be thrown upon the screen. It presents to you pictures of the cells as they are found lining the mouth of the European salamander. The two figures at the top illustrate very clearly the elements of the cell. The protoplasm forms a mass, offer- ing in this view no very distinctive characteristics, and therefore offer- ing a somewhat marked contrast with the nucleus which presents in its interior a number of granules and threads. Every nucleus consists of a membrane by which it is separated from the protoplasm, and three internal constituents: First, a network of living material, more or less intermingled with which is a second special substance, chromatin, which owes its name to the very marked affinity which it displays for the various artificial colormg matters which are employed in micro- scopical research. The third of the internal nuclear constituents we may call the sap, the fluid material which fills out the meshes of the network. Later on we shall have occasion to study somewhat more carefully the principal variations which nuclei of different kinds may present to us, and we shall learn from such study that we may derive seme further insight into the rapidity of development and the nature of the changes which result in old age. While the picture is upon the screen, I wish to call your attention to the other figures which illus- trate the process of cell multiplication. As you regard them you wilt notice in the succession of illustrations that the nucleus has greatly changed its appearance. The substance of the nucleus has gathered into separate granules, each of which is termed a chromosome. These chromosomes are very conspicuous under the microscope, because they absorb artificial stains of many sorts with great avidity and stand out therefore conspicuously colored in our microscopic preparations. They are much more conspicuous than is the substance of the resting nucleus. And this fact, that we can readily distinguish the dividing from the resting nucleus under the microscope, we shall take advantage of later on, for it offers us a means of investigating the rate of growth in various parts of the body. I should like, therefore, to emphasize the fact at the present time sufficiently to be sure that it will remain in your minds until the later lecture in which we shall make practical use of our acquaintance with it. It is unnecessary for our purposes tc enter into a detailed description of the complicated processes of cell division. But let me point out to you that the end result is that where we have one cell we get as the result of division—two; but the 100 POPULAR SCIENCE MONTHLY two divided cells are smaller than the mother cell and have smaller nuclei. They will, however, presently grow up and attain the size of their parent. Every cell is a unit both anatomically and physiologically. It has a certain individuality of its own. In many cases cells are found to be isolated or separated completely from one another. But, on the other hand, we also find numerous instances in which the living sub- stance of one cell is directly continuous with that of another. When the cells are thus related, we speak of the union of cells as syncytium. Of this I offer you an illustration in the second picture upon the screen, which represents the embryonic connective tissue of man. In this you can see the prolongations of the protoplasm of a single cell body uniting with the similar prolongations from other cell bodies, the cells them- selves thus forming, as it were, a continuous network with broad meshes between the connecting threads of protoplasm. The spaces or meshes are, however, not entirely vacant, but contain fine lines which corre- spond to the existence of fibrils, which are characteristic of connective tissue and at the stage of development represented in this picture, are beginning to appear. It is fibrils of this sort which we find as the main elements in the constitution of sinews and tendons, as, for in- stance, the tendon of Achilles, at the heel. In a very young body we find there are but few fibrils; in the adult body an immense number. There is, in fact, as you probably all know, a constant growth of cells; and this growth implies also, naturally, their multiplication. There has been in each of us an immense number of successive cell Fic. 4. EXAMPLE OF A SYNCYTIUM. Embryonic connective tissue from the umbilical cord ofa human embryo of about three months, magnified about 400 diameters, ¢, c, cells; /, inter_ cellular fibrils. AGH, GROWTH AND DEATH Iol generations, and at the present time a multiplication of cells is going on in every one of us. It never entirely ceases as long as life continues. The development of the body, however, does not consist only of the growth and multiplication of cells, but also involves changes in the very nature of the cells, alterations in their structure. Cells in us are of many different sorts, but in early stages of development they are of few sorts. Moreover, in the early stages we find the cells all more or less alike. They do not differ from one another. Hence comes the technical term of differentiation, to designate the modifications which cells undergo with advancing age. At first cells are alike; in older individuals the cells have become of different sorts, they have been differentiated into various classes. This whole phenomenon of cell Fic. 5. THREE TRANSVERSE SECTIONS THROUGH A RABBIT EMBRYO OF SEVEN AND ONE HALF DAYys, from series 622 of the Harvard Embryological Collection. A, section 247 across the anterior part of the germinal area. B, section 260 across the middle region of the germinal area. C, section 381, through the posterior part of the germinal area. Magnified 300 diameters. change is comprehensively designated by the single word, cytomorphosis, which is derived from two Greek words meaning cell and form, respect- ively. A correct understanding of the conception cytomorphosis is an indispensable preliminary to any comprehension of the phenomena of 102 POPULAR SCIENCE MONTHLY development of animal or plant structure. I shall endeavor, therefore, now to give you some insight into the phenomena of cytomorphosis as regarded by the scientific biologist. The first cells which are produced are those which form the young embryo. We speak of them, therefore, as embryonic cells, or cells of the embryonic type. Our next picture illustrates the actual character of such cells as seen with the microscope, for it represents a series of sections through the body of a rabbit embryo, the development of which has lasted only seven and one half days. You will notice at once the simplicity of the structure. There are not yet present any of those parts which we can properly designate as organs. The cells have been produced by their own multiplication and are not yet so numerous but that they could be readily actually counted. They are spread out in somewhat definite layers or sheets. but beyond that they show no definite arrangement which is likely to attract your attention. That which I wish you particularly to observe is that in every part of each of these sections the cells appear very much alike. The nuclei are all similar in character, and for each of them there is more or less protoplasm; but the protoplasm in all parts of these young rabbits is found to be very similar; and indeed if we should pick out one of these cells and place it by itself under the micro- scope, it would be impossible to tell what part of the rabbit embryo it had been taken from, so much do all the cells of all the parts resemble one another. We learn from this picture that the embryonic cells are all very much alike, simple in character, have relatively large nuclei, and only a moderate amount of protoplasm for each nucleus to complete the cell. Very different is the condition of affairs which we find when we turn to ASE aril OES a AS the microscopic examination of the adult. VERSE SECTION OF THE SPINALCorpd Did time permit it would be possible to or 4 HUMAN EMBRYO OF Four MIL- study a succession of stages and show you LIMETERS. Harvard Embryological : ee Sees . Collection, series 714. The spinal that the condition which we are about to cord’ at thisstage isa tubularatrac . study as extsune actually im the aciie ture. The figure shows a portion of the wall of the tube; the lefthand the result of a gradual progress and that boundary of the figure corresponds jn successive stages of the individual we to the inner surface of the tube. : . can find successive stages of cell change; but it will suffice for our immediate purpose to consider the results of differentiation as they are shown to us by the study of the cells of AGE, GROWTH AND DEATH 103 the adult. J will have thrown upon the screen for you a succession of pictures illustrating various adult structures. The first is, how- ever, a section of the embryonic spinal cord in which you can see that much of the simple character of the embryonic cells is still kept. All parts of the spinal cord, as the picture shows, are very much alike, and the nuclei of the cells composing the spinal cord at this stage are all essentially similar in appearance. What a contrast this forms with our next picture, which shows us an isolated so-called motor nerve cell from the adult spinal cord. It owes its name motor to the fact that it produces a nerve fiber by which motor impulses are conveyed from the spinal cord to the mus- cles of the body. The cell has numerous elon- gated branching _ proc- esses stretching out in various directions, but all leading back towards the cen- tral body in which the nucleus is situated. These are the processes which serve to carry in the nervous impulses from the periphery towards the center of the cell, impulses which in large part, if not ex- clusively, are gathered up from other nerve cells which act on the motor element. At one point there runs out a single process of a different char- acter. It is the true nerve fiber, and forms the axis, as it was formerly termed; or axon, Fic. 7. COPY OF THE ORIGINAL FIGURE From 8 it is at present more usually THE MEMOIR or DEITERS, in which the proof of named. of the nerve fiber as the origin of the nerve fibers directly from the : oe : nerve cells was first published. Thememoirisone We encounter it In an ordinary of the classics of anatomy. It was issued posthu- - i ino mously, for the author died young to the great loss ae e This. 7 single thread of science. The figure represents a single isolated like prolongation of the nerve motor nerve cell from the spinal cord of an ox, ==) Uae in , The single unbranched axon Ax, is readily distin- cell 5 likew ape constituted by guisbed from the multiple branching dendrites. the living protoplasm and serves to carry the impulses away from the cell body and transmit them ultimately to the muscle fibers which are to be stimulated to contraction. In the embryonic 104 POPULAR SCIENCE MONTHLY a Fic. 8 A LARGE CELL FROM THE SMALL BRAIN (CEREBELLUM) OF A MAN. It is usually called a Puikinje’s cell. It was stained black throughout by what is known as the Golgi silver method, hence shows nothing of its internal structure. After yon KO6lliker. spinal cord none of these processes existed, and the amount of the protoplasm in the nerve cell was very much smaller. As develop- ment progressed, not only did the protoplasm body grow, but the processes gradually grew out. Some of them branched so as to better receive and collect the impulses; one of them remained single and very much elongated, and acquired a somewhat different structure in order to serve to carry the nervous impulses away. ‘The third picture? shows us a section through the spinal cord of an adult fish. It has been treated by a special stain in order to show how certain elements of the spinal cord acquire a modification of their organization by which they are adapted to serve as supports for the nervous elements proper. They play in the microscopic structure the same supporting role which the skeleton performs in the gross anatomy of the body as a whole. They do not take an active part in the nervous functions proper. None of the appearances which this figure offers for our consideration can be recognized in any similar preparation of the embryonic cord. Obviously, then, from the embryonic to the adult state in the spinal cord there occurs a great differentiation. That which was alike in all its parts has been so changed that we can readily see that it consists of many different parts. A striking illustration of this is afforded by the next picture, which represents one of the large nerve cells which occur in the small brain, or cerebellum, that portion of the central nervous system which the physiologists have demon- * The illustration referred to is not reproduced in the text. AGH, GROWTH AND DEATH 105 strated to be particularly concerned in the regulation and coordination of movements. These large cells occur only in this portion of the ects - > —_ -——_- — - - - : ---y bH Fig.3. Fic. 9 VARIOUS KINDS OF HUMAN NERVE CELLS, AS DESCRIBED IN THE TEXT. After Sobotta. brain, and, as you see, differ greatly in appearance from the motor cells of the type which we were considering a few moments ago. And, again, 106 POPULAR SCIENCE MONTHLY another picture illustrates yet other peculiarities of the adult nerve cells. The upper figures in this plate are taken from cells which have been colored uniformly of a very dark hue, in consequence of which e = ~ _ os a] Fig.4. j Fig. ye Fic. 10. SECTIONS OF Four SOk1s OF EPITHELIUM, After Sobotta. they are rendered so opaque that the nucleus which they really contain is hidden from our view. But the deep artificial color makes it easy to follow out the form of the cells and the ramifications of their long processes. In the middle figures we have cells which have been stained by another method which brings out very clearly to the eye the fact AGE, GROWTH AND DEATH 107 that in the protoplasm of the cell there are scattered spots of substanceé of a special sort. No such spots can be demonstrated in the elements of the young embryonic nerve cells. To some fanciful observers the spots, thus microscopically demonstrable in the nerve cells, recall the spots which appear on the skin of leopards, and hence they have be- stowed upon these minute particles the term tigroid substance. The bottom figures represent the kind of nerve cells which occur upon the roots of the spinal nerves. It is unnecessary to dwell upon their ap- pearance, as the mere inspection of the figures shows at once that they differ very much indeed from the other nerve cells we have considered. We pass now to another group of structures, the tissues which are known by the technical name of epithelia. You can notice immediately in the figures from the skin that the appearances are very different from those we have encountered in contemplating the cells of the nervous system. And you can readily satisfy yourselves by the com- parison with the various figures now before you, of the fact that these epithelia are unlike one another. The figures represent epithelium, respectively, first from the human ureter; second, from the respiratory division of the human nose; third, from the human ductus epididymidis, and fourth, from the pigment layer of the retina of the cat. We turn now to a representation of a section of one of the orbital glands. This is very instructive because we see not only that the cells which compose the gland have acquired a special character of their own, but also that they are not uniform in their appearances. This lack of uniformity is due chiefly to the fact that the cells change their appear- ance according to their functional state. We can actually see in these cells under the microscope the material imbedded in their protoplasmic Fic. 11. To SHOW THE ORBITAL GLANDS, A, with the material to form the secretion accumulated within the cells. #, after loss of the material through prolonged secretion. From R. Heidenhain after Lavdowsky. 108 POPULAR SCIENCE MONTHLY ®odies out of which the secretion, which is to be poured forth by the cells, is to be manufactured. So long as that material for the secretion is contained in the cells, the cells appear large, and their protoplasmic bodies do not readily absorb certain of the staining matters, which the microscopist is likely to apply to them. When, however, the accumu- lated raw material has been changed into the secretion and discharged from the gland, the cell is correspondingly reduced in bulk, and as you see in this figure, it then takes up the stain with considerable avidity, as does also the nucleus which has likewise become reduced in size. These facts are very instructive for us, since they prove conclusively that with the microscope we can see at least part of the peculiarities in cells which are correlated with their functions. We can actually ob- serve that the cells of the salivary glands are able to produce their peculiar secretion because they contain a kind of substance which in the embryonic cell does not appear at all. There is a visible differen- tiation of these salivary cells from the simple stage of the embryonic cells. Something similar to this can be recognized in the next of our pictures representing a section of the gland properly known as the pancreas, but which is sometimes termed the abdominal salivary gland for the reason that it somewhat resembles the true salivary. In the cells of the pancreas also we can see the material, which is to produce the secretion, accumulated in the inner portion of the cell, and when it is so accumulated the cell appears enlarged in size and the nucleus is driven back towards the outer end of the cell where some unaltered protoplasm is also accumulated. When this raw material is turned yi % e a NS : Fig. 12. Two SECTIONS OF THE PANCREATIC GLAND OF A DoG. A, the cells are enlarged by the accumulation of material to form the secretion. JB, the cells are shrunk because there has been prolonged secretion und part of their substance is lost. From R. Heidenhain. AGH, GROWTH AND DEATH 109 over into secretion by a chemical change, it is discharged from the cell, the cell loses in volume and in its shrunken state presents a very dif-. ferent appearance, as is shown at B in the figure. It is necessary for the cells to again elaborate the material for secretion before they can a second time become functionally active. Here we have something of the secret of the production of the various juices in the body revealed to us. Other excellent examples of the differentiated condition of the cells are afforded us by the examination of hairs, of which I will show you two pictures. ‘The first represents a section through the human Fe ire Shae Oe Fic. 13. SECTION OF THE HUMAN SKIN, MADE SO THAT THE HAIRS ARE CUT LENGTHWISE. skin taken in such a way that the hairs are themselves cut lengthwise and you can see not only that each hair consists of various parts, but also that the cells in these parts are unlike. The follicles within the skin in which the hair is lodged likewise have walls with cells of various sorts. It may interest you also to point out in the figure the little muscle which runs from each hair to the overlying skin, so disposed > » that when the muscle contracts the “ particular hair will stand up on se te) POPULAR SCIENCE MONTHLY end.” Still more clearly does the variety of cells which actually exists in a hair show in the following picture, which represents a-cross-section of a hair, and its follicle, but more highly magnified than were the hairs in the previous figure. The adult body consists of numerous organs. These are joined together and kept in place by intervening << a Wes = P25 _ termes reed . by ee — : = ee “ Fic. 14. Cross SECTIUN OF THE ROOT OF A HAIR, substance. The organs themselves consist of many separate parts which are also joined by a substance which keeps them in place. This sub- stance has received the appropriate name of connective tissue. We find in the adult that it consists of a considerable number of structures. There are cells and fibers of more than one kind, which have been pro- duced by the cells themselves. There is more or less substance secreted by the cell which helps to give consistency to the tissue. In some cases this substance which is secreted by the cells becomes tougher and ac- quires a new chemical character. Such is the case, for instance, with cartilage. Or, again, you may see a still greater chemical meta- morphosis going on in the material secreted by the cells in the case of bone, where the substance is made tougher and stronger by the deposit AGE, GROWTH AND DEATH BEE of caleareous material... Nothing like cartilage, nothing like bone, exists in the early state of the embryo. They represent something different and new. The next of our illustrations shows us a muscle fiber of the sort which serves for our voluntary motions, which is connected typ- ically with some part of the skeleton. These muscle fibers are elon- gated structures. Eaeh fiber contains a con- tractile substance different from protoplasm, and which exists in the form of delicate fibrils which run lengthwise in the muscle fibers, and is so disposed, further, that a series of fine lines are produced across the fiber itself, each line cor- responding with a special sort of material dif- ferent from the original protoplasm. These cross lines give to the voluntary muscle fibers a very characteristic appearance, in consequence of which they are commonly designated in scientific treatises by the term striated. A striated muscle fiber is that which is under the control of our will. It should perhaps be men- tioned that the muscle fibers of the heart are also striated, though they differ very much in other respects from the true voluntary muscles. Fig 15. PART OF A And last of all for this series of demonstrations, MUSCLE FIBER OF THE I have chosen a representation of the retina. One can see at the top of the figure the peculiar cylindrical and developing projections, which HUMAN TONGUETO SHOW THE CROSS STRIATIONS. Two nuclei are included, one of which is shown at the edge of the fiber, the other in surface view. In the adult striated muscle fibers of mam- mals the nuclei are su- perficially placed. are characteristic of a retina, projections which are of especial interest because they represent the apparatus by which the rays of light are transformed into an actual sensory perception. After this has been accomplished, the perception is transmitted into the interior substance of the retina, and by the complication of the figure you may judge a little of the complication of the arrangements by which the transmission through this sensory organ is achieved, until the perception is given off to a nerve fiber and carried to the brain. There is not time to analyze all I might present to you of our present knowledge concerning the structure of the retina. But it will, I think, suffice for purposes of illustration to call your attention to the com- plicated appearance of the section as a whole and to assure you that nothing of the sort exists in the early stage of the embryo. To re- capitulate, then, what we have learned from the consideration of these pictures, we may say that in place of uniformity we now have diversity. It should be added, to make the story complete, that the establishment of this diversity has been gradually brought about, and that that which 112 POPULAR SCIENCE MONTHLY eee Blood vessels. Rod, outer seg- ment. Cone, outer seg- ment. Cone, inner seg- ment. Rod, inner seg- ment. Base of a cone fiber. Nucleus. Nucleus. Inner surface ot the retina (to- ward the light). Fibers which f& pass into the 2 optic nerve. Blood vessels Fic. 16. SECTION OF A HUMAN RETINA, from Stodhr’s Histology, sixth American edition. Although the retina is very thin it comprises no less than twelve distinct layers; the outermost layer is highly vascular. The pigment layer prevents the escape of light. The rods and cones convert the light waves into a sensory impulse, which is transmitted through the remaining layers of the retina to the optic nerve. The total structure is extremely complicated. we call development is in reality nothing more than the making of diversity out of uniformity. It is a process of differentiation. Dif- ferentiation is indeed the fundamental phenomenon of life; it is the central problem of all biological research, and if we understood fully the nature of differentiation and the cause of it, we should have probably got far along towards the solution of the final problem of the nature of life itself. The size of animals deserves a few moments of our time, for it is intimately connected with our problem of growth and differentiation. Cells do not differ greatly from one another in size. The range of their dimensions is very limited. This is particularly true of the cells of any given individual animal. Recent careful investigations have been made upon the relation of the size of cells to the size of animals, and it has been found that animals are not larger, one than another, because their cells are larger, but because they have more of them. This statement must be understood with certain necessary reservations. There are some kinds of animals, like the star-fish, which have very small cells; others, like frogs and toads, which have large cells; so that a star-fish of the same bulk as a given frog would contain a great many more cells. Our statement is true of allied animals. For ex- ample, a large frog differs from a small frog, or a large dog from a small dog by the number of the cells. An important exception to this law is offered for our consideration by the cells of the central nervous AGH, GROWTH AND DEATH Eta system, the nerve cells properly so called. This is demonstrated by the slide now before us, which shows us corresponding motor nerve cells of twelve different animals arranged in the order of their size—the elephant, the cow, the horse, man, the pig, the dog, the baboon, the cat, the rabbit, the rat, the mouse, and a small bat. You recognize im- Bos taurus Egquus caballus 72.4x56.7.. «GG 7.8 *5G.7 Homo ~——s Sus scrofa’ Canis familiaris 675*540 ———-63.4x51.3 66.8*45.4 toe Cynocephalus babuin Felis domestica Lepus cuniculus domesticus 60.7* 56.3 98.0*%354..0 45x 36.4 ee pc es @ Mus ratius albus = Mus musculus albus Atalapha cinerea 37.8*33.7 36.8x22.9 31.5x28.0 Fic. 17. Motor NERVE CELLS OF VARIOUS MAMMALS, all from the cervical region of the spinal cord. The cells are represented, all uniformly magnified. After Irving Hardesty. mediately that there is a proportion between the size of these cells and the size of the respective species of animals. To a minor degree, but much less markedly, there is a difference in the caliber and length of the muscle fibers. But with these exceptions our statement is very nearly exactly true, that the difference in size of animals does not in- volve a difference in the size of their cells. For the purpose of the study of development, which we are to make in these lectures, this uni- VOL. LXx!I.—8 114 POPULAR SCIENCE MONTHLY fermity in the size of cells is a great advantage, and enables us to speak in general terms in regard to the growth of cells, and renders it superfluous to stop and discuss for each part of the body the size of the cells which compose it, or to seek to establish different principles for different animals because their cells are not alike in size. Now we pass to a totally different aspect of cell development, that which is concerned with the degeneration of cells. For we find that, Fig. 18, CHANGES IN THE NERVE CELLS WITH AGE. after the differentiation has been accomplished, there is a tendency to carry the change yet further and to make it so great that it goes beyond perfection of structure, so far that the deterioration of the cell comes as a consequence. Such cases of differentiation we speak of as a degeneration, and it may occur in a very great number of ways. Very frequently it comes about that the alteration in the structure of the cell goes so far in adapting it to a special function that it is unable to maintain itself in good physiological condition, and failing to keep up its own nourishment it undergoes a gradual shrinkage which we call atrophy. = AN An \ Ay Se ™~ — o*” “ see = > of %, \ = “N oe = Ne = < y @ = et reo one oe zy Se te Wii ~ \ Fic. 5. Cross SECTION. SHOWING THE RELATIONS OF THE SECONDARY 10 THE MAIN CONE, it is only when an occasional gust of wind partially lifts the steam that one can get a glimpse of the floor of the crater. Descent into the crater by way of the breach in the side is comparatively easy and is attended with less danger than the view from the rim prophesied. The floor is covered with scoriaceous lava equaling, if not exceeding, in ruggedness that of the lava flow at the foot of the volcano. Steam with a tem- SOME LITTLE KNOWN MEXICAN VOLCANOES 183 perature of about 130 degrees Fahrenheit and sulphur dioxide are issuing from numerous fumaroles, some of which are lined with sulphur crystals. The crater is comparatively small, having a diameter of little over half a mile. Recent Eruptions—In 1877, 1884 and 1885 minor eruptions oc- curred. The last eruption of the voleano commenced in the month of February, 1903, and practically ceased in May of the same year. Since that time the only evidences of activity are the fumaroles from which issue large quantities of steam and other gases. During this eruption Fic. 6. FLANK OF TOLUCA. (1903) a lava stream flowed down the slope of the volcano in a north- west direction, but barely reached the foot of the volcano (see diagram), where it dammed a small stream, thus forming a shallow pond. The accompanying diagrammatic cross-section of the volcano shows the relations of the secondary cone to the main cone, the position of the lava flow of 1869, the edge of this flow (a), the rim of the old crater (b), the lava flow of 1903, and the position and relative heights of Colima and the Nevado of Colima (which may have been the remnant of the rim of a great volcano long since destroyed). In the construc- tion of this diagram, no attempt was made to draw the distances or heights to scale, but to bring out the salient points as clearly as possible. VoLcAno TOLUCA In the midst of the valley of Toluca, the Nevado of Toluca (Xinan- tecatl) towers almost 6,000 feet above the level of the plain and 14,833 184 POPULAR SCIENCE MONTHLY Fig. 7. BARRANCA SHOWING STRATIFIED TUFF AND FOSSIL SOIL. feet above the sea. It is called the Nevado, because usually its summit is white with snow. This volcano is isolated, being sur- rounded at some distance by volcanoes which have formed by the accumulation of their ash and lava an almost enclosed basin. It is one of the few high volcanoes of the world that can be ascended with ease, since it is possible to make the journey to and into the crater on horse- back in four or five hours. Because of the ease with which it may be climbed the ascent has been made by a number of persons, the first of whom was the great geographer and traveler Humboldt, who reached the crater in 1803. General Description—Voleano Toluca is underlaid by calcareous rocks of Cretaceous age. The great mass of the volcano is composed of many layers of ash of varying degrees of thickness which conform quite closely to the slope. These layers of ash were apparently formed partly by the ash which rained down during the eruptions and partly by that which was carried down by streamlets and to a considerable ex- tent in sheets during heavy rains. The accompanying photograph shows the stratified character of the slope and also a stratum of fossil soil, which in several of the “ barrancas ” or dry ravines is seen to be of con- siderable thickness. From this evidence it is fair to conclude that the last eruptions were preceded by a long period of inactivity, during which a large quantity of organic material was mixed with the weathered ash. Toluca has not been in eruption within historic times and at present there are no signs of activity, even secondary effects, such as fumaroles of steam and sulphur dioxide, being absent. SOME LITTLE KNOWN MEXICAN VOLCANOES 185 To watch the change in vegetation from the plain to the summit of the mountain is a constant pleasure. On the dry plain cactus and other desert plants are common, but on the flanks of the mountain pines begin and many bright-colored flowers. These, as one continues the ascent, become shorter and more stunted, until in the crater the flower blossoms an inch or thereabouts from the ground instead of one or two feet from the ground, as is the case lower down. On the highest portions of the rim vegetation is almost lacking. The Crater.—The crater of the volcano is somewhat elliptical in form, being a little more than a mile in its longest diameter and about a third of a mile in its shortest. The crater rim is complete on all sides, but is low on the side through which entrance is made. In the bottom of the crater and 1,000 feet below the highest portion of the rim are two beautifully clear lakes, the larger of which is almost one fifth of a mile in diameter and has a maximum depth of thirty feet. These two lakes are separated by a dome of compact andesite of con- siderable height (see illustration). This dome is of especial interest, because of its bearings upon the origin of the Mt. Pelée spike. There seems to be little doubt, as T. Flores points out, that it is composed of the lava which was forced up and out of the vent after the last eruption and which now closes it and stands above the floor of the crater. Comparison with Mt. Pelée—lIt was suggested by Dr. E. O. Hovey that the Pelée plug was formed in-this way also, 7. e., that instead of a solid mass of lava being pushed up bodily, as Heilprin believed, very 186 POPULAR SCIENCE MONTHLY stiff lava, being forced from the vent after the last eruption, hardened into a high mound. In the case of Pelée the shape of the mound was modified by a splitting off of the lava along vertical planes, which pro- duced the unique “ spike” of that volcano. Age.—A comparison of this voleano with others in Mexico has led Ordonez to state that it probably made its appearance during Phocene ee times. CinDER CONES OF VALLE DE SANTIAGO Cinder cones a few hundred feet in height are common objects in the central voleanic plateau of Mexico. Many of these may be seen in the basin in which the City of Mexico is situated, where the lower flanks of the higher voleanoes meet the plain. Near Toluca excellent examples occur. Because of the smallness of these cones as compared with the volcanoes near whose base they rise they are likely to be overlooked on Fic. 9. CRATER LAKE AND CINDER CONE, VALLE DE SANTIAGO, MEXICO. account of the overshadowing effect of the former. This is not true of the group of cinder cones, situated near the city Valle de Santiago, which are scattered about the valley some distance from the higher volcanoes, and which are, consequently, very conspicuous, their sym- metrical truncated cones being the most marked features of the land- Ss ape. This group of eleven craters occupies an area roughly circular in outline, one diameter of which is about six miles. Because of the fact that the valley of Santiago is a dry plain, the presence of lakes of pure water in four of the craters is unexpected. The clear blue SOME LITTLE KNOWN MEXICAN VOLCANOES 187 water of the lakes with their settings of green cultivated fields which cover the inner slopes of the craters are most beautiful objects. The existence of these lakes is due to the fact that their bottoms are below the levels of underground water. All these crater lakes are at practically the same level, a condition which is due to the fact that the voleanic material in which they rest and of which the plain is com- posed is extremely porous, which permits the free circulation of the water. The craters of the majority of the cones were partially filled with lava which poured out quietly after the explosions which formed them had ceased. In some cases they were filled until their bottoms were above the level of underground water and are consequently dry; in others there was either no subsequent outpouring of lava or the quantity was very limited, in which case the cavity remained below the level of underground water and a lake resulted. The diameter of the craters vary in size from that of Solis (1,500 feet)—which was appar- ently produced by the sinking of the crust—to the largest, which is more than a mile in diameter. The craters are not all perfect ; some are entire, while others are broken by one or two subsequent craters of explosion. In one of these breeched craters three small cones rise from the bottom, the material of which is apparently being used in the city for constructional purposes. The plain upon which the craters rest is underlaid by one or more strata of basaltic lava which evidently flowed from the neighboring mountains and which may be seen near the water level of the lakes and in rayines which have been deeply cut by streams. Since neither this stratum nor the strata of basaltic lava are disturbed by being domed up or bent to any extent, it seems safe to conclude that the explosions forming the craters must have been near the surface and very local, otherwise the strata overlying the plain at that place would have been more or less bent. The cones are made up in some cases of voleanic ash of various degrees of fineness, in others of volcanic breccia. The slopes are those which are normally made by such materials. Because of the fact that craters of explosion in other parts of Mexico—Puebla, Mexico City, here in Valle de Santiago, and else- where in the republic—arise from a plain or a more or less enclosed basin which is full of water at a comparatively shallow depth, Ordonez suggests that superficial water may have had a share in the production of the explosions. Such are a few of the points of interest on the volcanic plateau of Mexico, a region which, interesting because of its scenery and climate, fascinating because of its romantic history, is to the geologist a volume which when studied will explain many points that are now a matter of speculation. 188 POPULAR THE PROGRESS OF DOES THE SPEED OF LIGHT IN SPACE DEPEND UPON ITS WAVE-LENGTH? WHEN a beam of light comes through a prism of glass or a raindrop it is dispersed into a band of vivid colors, each denoting a particular wave-length. | Though all these wave-lengths travel | together in the air they part company | in the glass or the water because there | they no longer possess the same speed. The long waves, which produce the sen- sation of red, travel faster than the} short, or violet waves. Whether all wave-lengths really do travel with the same speed in air has not always been a matter of a single opinion. Lorenz and Ketteler both have found that the index of refraction for air differs by some seven parts in a million according to which end of the | spectrum is employed.. This means a proportionate difference in the speed of | light in air for the long and for the short waves. More than a quarter of | a century ago Young and Forbes, using Fizeaw’s method, seemed to find that the speed of the blue waves in air was 1.8 per cent. greater than that of the red ones. This result was threshed over by Lord Rayleigh, who pointed out serious objections to accepting their results. When mining the speed of light, he paid espe- cial attention to this question. When white light and red light were com- pared not the slightest trace of differ- | ence in their speeds could be detected. | We may, therefore, rest assured that | all waves of the visible spectrum travel Michelson was deter- | with practically the same speed in air. Now cially in that vast vacuum, interstellar how is it in a vacuum, espe- space? If we begin by limiting our observations to our own solar system, ‘ then SCIENCE MONTHLY SCIENCE it has been noticed that when one of its satellites goes behind Jupiter its color is just the same as when it emerges. Suppose that Young and Forbes were right and that the blue rays do travel faster than the red rays. Then when the satellite is behind the planet so that it can send no more light to the earth, the train of waves which it emitted before its eclipse, still pursues its jour- ney toward us. If the blue waves out- run the red waves, it will be the latter which give us our last glimpse of the satellite. At disappearance it should appear red. Similarly upon emergence the blue should be the first waves to reach the eye, but no such difference of color upon eclipse and emergence is seen. Hence we may con- elude that all waves of the visible spec- trum travel in space with the same speed. It is, however, well to bear in mind that the universe is larger than the solar system and that the visible spectrum by no means includes all known radiation. In 1859 Uriah A. Borden deposited with the Franklin Institute of Phila- delphia one thousand dollars to be awarded as a premium to “any resi- dent of North America who shall de- termine by experiment whether all rays of light, and other physical rays, are or are not transmitted with the same velocity.” This problem was restated the thus: “Whether or not all rays in the spec- trum known at the time the offer was made, namely, March 23, 1859, and by board of managers comprised between the lowest frequency known thermal rays in the infra-red, and the highest frequency known rays in the ultra-violet . . . travel through free space with the same velocity.” Dr. Paul R. Heyl, of the Central THE PROGRESS OF SCIENCE 189 High School of Philadelphia, has solved | image. A comparison of the two cycles one part of this problem. He has shown that the ultra-violet waves and the waves of the visible spectrum travel with the same velocity. For this the Franklin Institute has awarded to him one thousand dollars of the accumu- lated fund. There has been no lack of applications for the premium, but no portion of it has ever before been awarded. The investigating committee, | consisting of Mr. Hugo Bilgram, me- chanical engineer; Professor A. W. Goodspeed, of the University of Penn- sylvania, and Dr. G. F. Stradling, of the Northeast Manual Training High School of Philadelphia, were unanimous in their favorable opinion. The star Algol, or 8 Persei, is a spec- troscopie binary, that is, a study of its light shows that part of the time the star is approaching the earth and part of the time receding from it. More- over, every 69 hours it grows less bright, only to regain its rank as a star of the second magnitude after the lapse of about 7 hours. The simplest ex- planation of these erratic performances is that there are two bodies, one lumin- ous, the other opaque, revolving around The dim- ming of brightness occurs when the their common center of mass. opaque body gets between the earth and the luminous body. Their diameters, orbital velocities and masses have been calculated and also the distance their centers are apart. The remoteness of Algol—it takes light 30 years to come thence to the earth—as well as its change of bright- ness caused it to be selected by Dr. Hey! for his investigation. method was this. of the change of brightness of the star by photographing it at intervals in ultra-violet light produced by a trans- parent diffraction grating. The varia- tion as judged by the eye was already known. If the ultra-violet waves travel faster than those belonging to the vis- ible spectrum there would be a shifting of the time of least brightness of the In brief his | He obtained records | of change however shows that there can not be a greater difference between the speed of the ultra-violet light and that of the visible spectrum of more than one part in 250,000. There seems to have been no previous determination of the speed of ultra- violet waves in a vacuum. Dr. Heyl’s result, in substance that the two kinds of waves do not differ in speed by more _than 1 km. per second, is of high value. To be sure it has been assumed for a long time that no such difference exist- ed, but an experimental proof is a very different thing from mere extrapolation. The work was conducted with the 8-inch equatorial of the Central High School and extended over a period of two years. The times when the varia- tion of Algol occurred at a suitable time of day and under appropriate conditions of the sky were rare. As yet there seems to be no experi- mental demonstration that the infra- red rays and those of the visible spec- trum travel in space with the same speed. As far back as 1842 Wrede be- lieved he had shown that the two speeds were different, but his work was subject The method of Dr. Heyl does not lend itself to the settlement of this second part of the problem, since the infra-red rays have little effect upon a photographic plate. to error. Let us hope that some physicist may devise an appro- priate method and thus remove this gap in our knowledge of the velocity of radiation—incidentally obtaining an- other portion of the Boyden premium. THE DUKE OF ARGYLE THE autobiography and memoirs of the late Duke of Argyle, edited by his wife, have lately been published in two large volumes. Perhaps most men of science, on being asked offhand for an estimate of the duke, would reply that he dilettante, with more enthusiasm than knowledge. In a was an amiable way, this is correct enough; but given ROR LAT 190 SCIENCE MONTHLY Yeorge Douglas, Ox L uke of. lrgy ll me RG ISOS qualification, it does him a He his life, an earnest, sincere and indus- without great injustice. was, throughout trious man, much interested in the ad- vancement of his fellows and the eculti- vation of his own mind. an enormous estate, and taking a most prominent part in the politics of his time, he bore on his shoulders as great a burden as a man might care to lift, without taking time and energy for sci- entific work. It is impossible to say what he might have done, had he de- voted himself mainly to some single branch of science or literature, but one may readily believe that it would in no Inheriting wise have equalled his actual achieve- He was not a genius, in the ordinary ac- ment as a versatile man of affairs. ceptation of the term; but he was one of those thoroughly useful citizens who serve to hold together the diverse ele- ments of human society. In this sense, he was a duke in fact as well as in name, and an aristocracy so typified is not without a certain justification even from our democratic point of view. Many naturalists are familiar—and some no less tired than familiar—with the semi-metaphysical questions relating to duke’s controversial writings on evolution. Fewer, we imagine, know THE PROGRESS how enthusiastically he watched the birds and other living things on his estate, and how graphically and accu- rately he could describe them. The following, taken from a letter to Lord Litford, should endear him to every ornithologist: ‘“‘Anent the dipper, I need not say how I agree with you in loving them. I have three salmon streams in my estates which they haunt. I never allow one to be shot. We have many pairs, but they never AS propensities, I have had ocular demon- seem to increase much. to their stration that they eat fish, and that greedily. Twice I have seen a dipper with a fish in his bill—one was a trout or salmon fry, the other was a small flounder. This was in the seaport of The flounder was, of course, a small one, the river Aray below my house. but it was as broad as the white waist- coat of its devourer. I had a good glass, and saw the dipper emerge with the little flounder in his bill. He then took it to a large boulder stone near the bank, and began beating it to death against the stone. Twice it slipped off into the stream, and each time it was firmly pursued and brought back to the block! seem to have a way of doubling and All aquatic piscivorous birds folding up the flat fishes they catch so | as to get them down, but I did not see the feat performed in the present case.” The following good story is told in another part of the same letter: “I bought two ‘civette’ (small owls) in Rome, and took them in a cage with me home. We travelled with Gladstone. He was immensely captivated by the brilliant yellow eyes of the birds. fastened them Gladstone’s brown eyes with a fixed stare, and he took it into his head to try if he could stare them out of countenance. on He continued to joke all the way from Rome to near Perugia, and at last the owls gave it up and looked away. He seemed as | delighted as if he had won a great Parliamentary triumph.” This is dated 1896. His first letter on birds, so far They OF SCIENCE 191 as the biography shows, was written in 1837—and the interest did not flag in the long interval. SCIENTIFIC ITEMS WE record with regret the deaths of Professor Alfred Newton, F.R.S., who held the chair of zoology and compara- tive anatomy at Cambridge; of Dr. Edward John Routh, F.R.S., the mathe- matician, of the University of Cam- bridge; of Dr. Maxwell Tylden Masters, | _F.R.S., the English botanist and horti- of Dr. Alexander Stewart Herschel, F.R.S., honorary professor of eulturist ; physics at the Durham College of Sci- ence; of Sir Dietrich Brandis, F.R.S., of the of India; of Professor Kuno Fischer, pro- fessor of philosophy at Heidelberg; Henry G. Hanks, at one time state inspector general forests of geologist of California, and of Mrs. Elizabeth Cabot Cary Agassiz, who in 1850 married Louis Agassiz, with whose work she was intimately associated, and whose life she wrote. Tue council of the British Associa- tion for the Advancement of Science has nominated Mr. Francis Darwin, F.R.S., foreign secretary to the Royal Society, author of important papers on physiological botany and of the * Life and Letters of Charles Darwin,’ to be president of the meeting next year, when, for the fourth time, the associa- tion will in Dublin.—M. Lapparent, professor of mineralogy and assemble de geology at Paris, has been elected per- manent secretary of the Paris Academy in to the late M. Berthelot—On the occasion of the of Sciences succession celebration of the bicentenary of the birth the medal of the Royal Swedish Academy of Linneus, Linnean gold was awarded to Sir Joseph Hooker.— A portrait of President Eliot by Mr. John P. Sargent has been unveiled in the Harvard Union. Dr. E. H. SELLARDS, for three years geologist and zoologist to the Florida University, has been appointed state geologist of Florida by Governor Brow- 192 POPULAR ard.—Dr. E, A. Ruddiman, professor | of materia medica and pharmacy at. Vanderbilt University, Nashville, has_ been appointed chief food ana drug in- | spector of the Department of Agricul- ture.—Dr. Frederick L. Dunlap, in- structor in the University of Michigan, has been appointed associate chemist in the Bureau of Chemistry, and will be a member of the board of food and | drug inspection. AN Italian Association for the Ad- vancement of Science, proposed at Milan last year, has now taken form. The first meeting will be held at Parma in September next, when it is hoped SCIENCE MONTHLY that the sister associations of Europe and America will send delegates. Mrs. RUSSELL SacE has given the sum of $300,000 to found what will be known as the Russell Sage Institute of Pathology as an adjunct to the City Hospital on Blackwell’s Island.—Dr. Lawrence F. Flick, director of the Phipps Institute, Philadelphia, and chairman of the committee on the In- _ternational Congress of Tuberculosis, which is to be held in Washington in the fall of 1908, announces that he has received $35,000 in subscriptions to a fund of $100,000 which he is raising to meet the necessary expenses. ip os 3) Pe EwreAR 8 CRWNe MEO NE Aa SEPTEMBER, 1907 THE PROBLEM OF AGE, GROWTH AND DEATH By CHARLES SEDGWICK MINOT, LL.D., D.Sc. JAMES STILLMAN PROFESSOR OF COMPARATIVE ANATOMY IN THE HARVARD MEDICAL SCHOOL Ill. THe Rate or GrowTH Ladies and Gentlemen: In the first of the lectures, I described those grosser characteristics of old age, which we ourselves can readily dis- tinguish, or which an anatomical study of the body reveals to us. In the second lecture I spoke of the microscopic alterations which occur in the body as it changes from youth to old age. But besides the changes, which we have already reviewed, there are those others, very conspicuous and somewhat known to us all, which we gather together under the comprehensive term of growth. It is growth which I shall ask you to study with me this evening, and I shall hope, by the aid of our study, to reinforce in your minds the conclusion which I have already indicated, that the early period of life is a period of rapid decline, and that the late period of life is one of slow decline. In order to study growth accurately, it is desirable, of course, to measure it, but since we are concerned with the general problem of growth, we wish no partial measure, such as that of the height alone would be. And indeed, if we take any such partial measure, how could we compare different forms with one another? The height of a horse is not comparable to that of a man; the height of a caterpillar is not comparable to that of any vertebrate. Naturally, therefore, we take to measuring the weight, which represents the total mass of the living body, and enables us at least with some degree of accuracy to compare animals of different sorts with one another. Now in studying this question of the increase of weight in animals, as their age in- creases, it is obviously desirable to eliminate from our experiments all disturbing factors which might affect the rate of growth or cause it to assume irregularities which are not inherent either in the organiza- VOL. LXXxI.—13. 194 POPULAR SCIENCE MONTHLY tion of the animal or in the changes age produces. The animals which belong to the vertebrate sub-kingdom, of which we ourselves are mem- bers, can be grouped in two large divisions according to the natural temperature of their bodies. The lower vertebrates, the fishes, frogs and their kin, are animals’ which depend for their body temperature more or less on the medium in which they live. The other division of vertebrate animals, which includes all the higher forms, are so organized that they have within certain limits the power of regulating their own body temperature. Now it is easily to be observed—and any one who has made observations upon the growth of animals can confirm this—that animals otherwise alike will grow at different speeds at different temperatures. There are animals, like the frogs and _ salamanders, which will live at a very considerable range of tem- perature and thrive, ap- parently. No ultimate in- jury is done to them by a change of their bodily tem- perature. Here we have a picture of four young tad- poles, all of which are ex- actly three days old. The first of these has been kept at a temperature not much above freezing. The fourth, at a temperature of about 24 degrees centigrade; the other two at temperatures Fic. 19. Four TADPOLES OF THE EUROPEAN FROG Rana fusca. After Oskar Hertwig. The four animals between. They are all de- are all of the same age (three days) and raised fromthe gcendants from the same same batch of eggs, but have been kept at different tem- ie batch of frogs’ eggs, and D fe peratures. A at 11.5° Centigrade, B at 15.0° Centigrade. you can see readily that C ** 20.0° : D ‘* 24.0° : : the first one is_ still essentially nothing but an egg. The second one, which has had a little higher temperature, already shows some traces of organization, and those familiar with the development of these animals can see in the markings upon the surface the first indications of the differentia- tion of the nervous system. ‘The third has been kept at a considerably warmer temperature, and is now obviously a young tadpole; here are the eyes, the rudimentary gills, the tail, ete. While the fourth tadpole, which was maintained at the best temperature for the growth of these animals, has advanced enormously in its development. Obviously, should we make experiments upon animals of this class it would be AGE, GROWTH AND DEATH 195 necessary to keep them at a uniform temperature, if we wished to study their rate of development, and that is, for very practical reasons, extremely difficult and unsatisfactory. Far better it has seemed for our study of growth to turn to those animals which regulate their own temperature. This, accordingly, I have done, and the animal chosen for these studies was the guinea-pig, a creature which offers for such investigations certain definite advantages. It is easily kept; it is apt to remain, with proper care, in good health. Its food is obtainable at ee as ey (Ss es OS =f Setar a fia ea inn (ScumESMeEp coe ee re 0 pees ee ee ol i ales JS eee eee ee Bam cere aisle ee er a a ca iderT PT COP VU ee ey Key algae fea Fic. 20. CURVES SHOWING THE GROWTH OF BosTON SCHOOL CHILDREN IN HEIGHT AND WEIGHT. After H. P. Bowditch. - all seasons of the year, in great abundance, and at small expense. . The animals themselves being of moderate size do not, of course, require such extraordinary amounts of food as the large animals, should we experiment with them. Accordingly with guinea-pigs I began making, years ago, a long series of records, taking from day to day, later from week to week, and then, as the animals grew older, month by month, the weight of recorded individuals. There was thus obtained a body of statistics which rendered it possible to form some idea of the rapidity of growth of this species of mammal. Now in regard to the rapidity of growth, it is necessary that we form clearer notions than perhaps you started out with when you came into the hall this evening. I will ask for the next of our pictures on the screen, where we shall see illustrated to us older methods of 196 POPULAR SCIENCE MONTHLY recording the progressive growth of animals. This is a chart taken from the records of my friend, Dr. Henry P. Bowditch, showing the growth of school children in Boston. Here we have, in the lower part of the figure, the two curves of growth in weight. The upper curve is the weight of boys. We can follow it back through the succession of years down to the age of five and one half years, when the records begin. The child weighs, as you see, a little over forty pounds at that time. When the boy reaches the age of eighteen and one half years, he approaches the adult size, and weighs well over 130 pounds. Here then we see growth represented to us in the old way, the progressive in- crease of the animal as it goes along through the succession of years. Now this is a way which records the actual facts satisfactorily. It shows the progressive changes of weight as they really occur; but it does not give us a correct impression of the rate of growth. Concern- ing the rate of growth, some more definite notion must be established in our minds before we can be said to have an adequate conception of the meaning of that term. It is from the study of the statistics of the guinea-pigs, and of other animals, which I have since had an opportunity of experimenting with, that we get indeed a clearer insight as to what the rate of growth really is and really means. I should lke to pause a moment to say that when I first published a paper upon the subject of growth, it, fortunately for me, interested the late Dr. Benjamin Gould. The experiments which I had made and recorded in that first publication came to a sudden end, owing to a disaster for which I myself was personally not responsible, by which practically my entire stock of animals was suddenly destroyed. Dr. Gould, after consulting with me, proposed that I should have further aid from the National Academy of Sciences, and through his inter- vention I obtained a grant from the Bache fund of the academy. That liberal grant enabled me to continue these researches, and this is the first comprehensive presentation of my results which I have attempted. In this and the subsequent lectures, I hope that enough of what is new in scientific conclusions may appear to make those to whose generosity I am indebted feel that it has been worthily applied. I can not let such an occasion as this pass by without expressing publicly my gratitude to Dr. Gould for his encouragement and support at a time when I most keenly appreciated it. If animals grow, that which grows is of course the actual substance of the animal. Now we might say that given so much substance there should be equal speed of growth, and we should expect, possibly, to find that the speed would be more or less constant. I can perhaps illustrate my meaning more clearly, and briefly render it distinct in your minds, by saying that if the rate of growth, as I conceive it, should remain constant, it would take an animal at every age just the same length of time to add ten per cent. to its weight; it would not be a AGH, GROWTH AND DEATH 197 question whether a baby grew an ounce in a certain length of time, and a boy a pound in the same time, for the pound might not be the same percentage of advance to the boy that the ounce would be to the baby. In reality with an advance of an ounce the baby might be growing faster than the older boy with the addition of the pound. In the next slide which we are to have thrown upon the screen we have my method of measuring rate of growth illustrated graphically. There is here a curve which represents the rate of growth of male guinea-pigs. The figures at the bottom indicate the age of the animals in days. When guinea-pigs are born, they are very far ad- vanced in development, and the act of birth seems to be a physiological - ao 0 258i M 23 29 3538 45 60 75 $0 105 120 135 150 165 180 195 210daye 241 Fic. 21. CURVE SHOWING THE DAILY PERCENTAGE INCREMENTS IN WEIGHT OF MALE GUINEA PIGs. shock from which the organism suffers, and there is a lessening of the power of growth immediately after birth. But in two or three days the young are fully recovered, and after that restoration they can add over five per cent. to their weight in a single day. But by the time they are 17 days old, as represented by this line, they can add only four per cent., and by the time they are 24 days old, less than two per cent.; at 45 barely over one per cent.; at 70 still over one per cent.; at 90 less; at 160 less; and towards the end the curve con- tinues dropping off, coming gradually nearer and nearer to zero, to which it closely approximates at the age of 240 days. In about a year, the guinea-pig attains nearly its full size. You notice that this curve is somewhat irregular. Such is very apt to be the result from statistics when the number of observations is not very large. It means simply that there was not a sufficiently large number of animals measured to give an absolutely even and regular set of averages. But the general course of the curve is very instructive. In the earlier condition of the young guinea-pig there is a rapid decline; in the later, a slow decline. 198 POPULAR SCIENCE MONTHLY The change from rapid to slow decline is not sudden, but gradual, as you see by the general character of this curve. In the next slide we can see immediately that what I have asserted as true of the male is equally true of the female, although the values Ao SS SS] —— Say Se a es SSS See ea Ses SS ae Se a ESS Sa lA X= hn A i em Sell i7 23 29 35 165 180 195 2i0daya Pry Fic. 22, CURVE SHOWING THE DAILY PERCENTAGE INCREMENTS IN WEIGHT OF FEMALE GUINEA-PIGS. which we have differ slightly in the two sexes, and there are accidental but not significant variations in this curve as in the first. Here also we observe at once an early period of rapid decline in which the rate of growth is going down and down—a period of slight decline in which, to be sure, it is going down still, but with diminished rapidity. There is another method by which we can represent this change Perncod 3 4+ 5 6 7 8 9 10 Il 12 13 14 15 16 I7 18 19 20 21 22 23 2425 Fig. 23. CURVE SHOWING THE LENGTH OF TIME REQUIRED TO MAKE EACH SUCCESSIVE INCKEASE OF 10 PER CENT. IN WEIGHT BY MALE GUINEA-PIGS., AGE, GROWTH AND DEATH 199 in the rate of growth which will perhaps help to illustrate it; and in the next of our pictures we see this other form of representation before us. This vertical line represents the length of time which it takes a young male guinea-pig to add ten per cent. to its weight the first time. Here the third time—the fourth—the fifth—and you see as it 1s grow- ing older and older it takes the animal longer and longer to add ten per cent. to its weight. Finally we get to the nineteenth addition, and we see that the period is very long indeed. How long that period is we can judge by the figures here upon the left, which ate the length of the days. From the base line to this one marked “ten” is a period of ten days, and you see from the time the guinea- pig has added to its weight ten per cent. for the nineteenth time it does it so slowly that it requires ten days and more; for the twenty-first time, nearly twenty; for the twenty-second time, nearly forty. Here where the number of observations becomes small, the curve grows very irregular. Thus we demonstrate that as the animal grows older it takes longer and longer to add ten per cent. to its weight. In the other sex, as the next slide shows, the same phenomena can be clearly demonstrated ; here are the periods as before, lengthening out, as you see, at first; then becoming very long indeed. In the following slide I have another | Se ot ee a we a Se heer TTT Jett 3 45678 9 10 I 12 13 14 15 16 17 18 19 20 21 22 23 24 25 70 60 50 30 20 Fic. 24. CURVE SHOWING THE LENGTH OF TIME REQUIRED TO MAKE EacH SUCCESSIVE = INCREASE OF 10 PER CENT. IN WEIGHT BY FEMALE GUINEA-PIGS. 200 POPULAR SCIENCE MONTHLY form of representation of this same phenomenon as it occurs in the human subject. Here is a diagram of growth, which represents, as accurately as I could determine it, the curve complete for man from the date of birth up to the age of forty years. It has been calculated by a simple mathematical process where these ten-per-cent. increments fall, and from each point in this curve where there has been such an increment, a vertical line has been drawn, as you see here. These lines are very close together at the start. One ten per cent. after another follows in a short interval of time, but gradually the time, as indicated by the space between two of these vertical lines, increases, and when the individual is three years old, you can see there has been a very great qin 7 Fic. 25. CURVE SHOWING THE GROWTH OF MAN FROM BIRTH TO MATURITY, With vertical lines added to mark the duration of the periods, for each 10 per cent. addition to the weight. lengthening out of the period which is necessary for it to add ten per cent. to its weight. Then it comes at the age of twelve to a period of slightly more rapid growth, a fluctuation which is characteristic of man, but does not appear in the majority of animals. After that comes very rapidly the enormous lengthening of the period; and I have not added the last ten per cent. because the curve here at the top, you see, is not very regular, and it could not be calculated with certainty. Our diagram is merely another form of graphic representation of the fact that the older we are the longer it takes us to grow a definite proportional amount. The next slide carries us into another part of our study, away from the mammals which we have thus far considered, into the class of birds. The growth of chickens is represented here. Now a chicken is born in a less matured state than a guinea-pig, and has a good deal AGH, GROWTH AND DEATH 201 | ee ee at (| Percertiage Sncvements Oech, Males LL HN wIM i HAVEN dT — 6376 13 Ho i 6 7 90 106 \sidayd 342 Fic. 26. CURVE SHOWING THE DAILY PERCENTAGE INCREMENTS IN WEIGHT BY MALE CHICKENS. higher efficiency of growth at first. In a chicken, as in a guinea-pig, birth is a disturbing factor, and growth immediately after the hatching of the chicken is a little impeded, but the chick quickly recovers and, as we see, the first time when the rate can be distinctly measured we get a nine-per-cent. addition to the weight in a single day. In a chicken as in the guinea-pig, the rate gradually diminishes. The change from the rapid decline at first to the later slower decline is more gradual; the curve is more distinctly marked in the chicken as a round curve. There is not in the bird so marked a separation of the preliminary rapid de- cline and the later slower decline as we find in the guinea-pig. The curve again is very irregular because I had only a very limited number of observations upon the weight of chicks. The other sex, as the next slide will show, presents similar phenomena, though the female chickens do not grow quite as fast as their brothers. Here we notice an increase Pence phage Incuwments Cluck Semales 0326 131822203330 46 56 66 7° 90 106 130 97 days 342 Fic. 27. CURVE SHOWING THE DAILY PERCENTAGE INCREMENTS IN WEIGHT BY FEMALE CHICKENS. 202 POPULAR SCIENCE MONTHLY of almost, but not quite nine per cent., rapidly falling down so that after the chick is two months old it never adds as much as three per cent. to its weight. It loses in the first two months from a capacity to add nine per cent., down to a capacity of adding less than three. It loses in two months two thirds of its total power of growth, for from nine to zero is divisible into two parts, of which the first, from nine down to three, would be two thirds, and the second, from three to zero, would be one third. Here then we learn that two thirds of the decline which occurs in the life of a chick takes place in two months, and for the rest of the life of the bird there is a decline of one third. That, you must acknowledge, is an extraordinary and most impressive difference. If it be true that the more rapid growth depends upon the youth of the individual,—its small distance in time from its procreation, then we may perhaps, by turning to other animals which are born in a more immature state, get some further insight into these changes; and that I have attempted to do by my observations upon the development of rabbits. Rabbits, as you know, are born in an exceedingly immature state. They are blind, they are naked, they are almost incapable of definite movements, quite incapable of locomotion, and are hardly more than little imperfect creatures lying in the nest and dependent utterly upon the care of the mother, quite unable to do anything for them- selves except take the milk which is their nourishment. They are in- deed animals born in a much less advanced stage than are the guinea- pigs. Upon the screen we see this interesting result demonstrated to us, that a male rabbit, the fourth day after its birth, is able to add over seventeen per cent. to its weight in one day. From that the curve drops down, as you see, with amazing rapidity, so that here at an age of twenty-three days the rabbit is no longer able to add nearly eighteen per cent. daily, but only a little over six. At the end of two months from its birth, the growth power of the rabbit has dropped to less than two per cent., and at two months and a half it has dropped to one. The drop in two and a half months has been from nearly eighteen per cent. down to one per cent., and the rest of the loss of one per cent. is extended over the remaining growing period of the rabbit. Could we have a more definite and certain demonstration of the fact that the decline is most rapid in the young, most slow in the old? It is not in this case any more than in the others the one sex that demonstrates this fact, for in the female we find exactly the same phenomena, as the next slide will show. The irregularities are not significant. The strange dip at thirty-eight days, for instance, corresponds to an illness of some of the rabbits which were measured, but they rapidly recovered from it and grew up to be fine, nice rabbits. If instead of measuring half a dozen rabbits, we had measured two hundred or five hundred, these irregularities would certainly have disappeared. The females in the case of the rabbits, as in the case of the guinea-pigs, are not able AGH, GROWTH AND DEATH 203 03 8 131823283338 = 55 72 «106 180days ag Fic. 28. CURVE SHOWING THE DAILY PERCENTAGE INCREMENTS IN WEIGHT BY MALE RABBITS. to grow quite so fast at first. We see here sixteen instead of over seven- teen per cent. as the initial value, but the general character of the drop is the same, enormously rapid at first and very slow afterwards. All of our cases, then, show the same fundamental phenomena appearing with different values. Now in regard to man, we do not possess any such adequate series of statistics of growth as is desirable. We have many records of the weight of babies, by which I mean children from the date of birth up to one year of age. We have also very numerous records of school children, which will extend perhaps from five and one half up to say seventeen, eighteen or even nineteen years. There are records of boys 204 POPULAR SCIENCE MONTHLY 1g 4 17 16 15 e | Peccentage Ircnuments Pablbty itl Females 13 = a \ 03 8 1318232833V 55 80 106 180 darya 27 38 F oO Fic. 29. CURVE SHOWING THE DAILY PERCENTAGE INCREMENTS IN WEIGHT BY FEMALE RABBITS. at universities, and a still more limited number of weighings of girls at colleges. But all these statistics piled together do not give us one comprehensive set of data including all ages. This is very much to be regretted, and it would be an important addition to our scientific knowl- edge could statistics of the growth of man be gathered with due precau- tions. It would fill one of the gaps in our knowledge which is lament- able. We have, however, some rough, imperfect data which for our present purposes it seems to me are adequate, and the results of the study of these will be shown by the next series of pictures. But let us pause for a moment to consider this singular table. It shows in this column the number of days which it takes for each species AGH, GROWTH AND DEATH 205 TABLE! 100 Parts Mother’s Milk Contain Days Needed to Species Double Weight ee oe ae ; Phosphoric o ACl Man 180 1.6 0.2 0.0328 0.0473 Horse 60 2.0 0.4 0.124 0.131 Cow 47 3.5 0.7 0.160 0.197 Goat 19 4.3 0.8 0.210 0.322 Sheep 10 6.5 0.9 0.272 0.412 Cat $ 7.0 1.0 — —_ Dog 8 1633 123 0.453 0.493 Rabbit ii 10 4 2.4 0.8914 0.9967 of animal indicated at the left to double its weight after birth. A man requires 180 days to double his weight; a horse, 60; a cow, 47; a goat, 19; a pig, 18; a sheep, 10; a cat, 914; a dog, 8; a rabbit, 6 (or possibly 7 days). Now here are analyses of the milk. The main point of interest is to be found in the figures in this column, which represent the amount of albuminoid, or proteid material contained in the milk. You will observe that for man the proportion is lowest, 1.6 per hundred parts; the horse has a little more—2; cattle—3.5; and so the values run. In other words, it is obvious that the less the proteid in the milk, the longer does the species require to double its weight. This looks at first sight as if there were a relation between the composition of the milk and the period of growth of the animal; but you know very well that if you take the milk of a cow, which is very much richer in proteid material, and feed it to a baby, a human baby, that baby does not grow at the same rate as the young cow, but grows at the human rate. It is obvious, therefore, that it is somewhat more complicated than a mere question of food supply. We have in fact one of the beautiful illustrations of the teleological mechanism of the body. These various species have their characteristic rates of growth, and by an exquisite adaptation, the composition of the mother’s milk has become such that it supplies the young of the species each with the proper quantum of proteid material which is needed for the rate of growth that the young offspring is capable of. It is a beautiful adjust- ment, but there is not a causal relation between proteid matter and this rate of growth. It is an example of correlation, not of causation. We pass now to the next of our slides, which carries us over into the study of our own species. It is not possible at the present time to represent in any form of curve which I have seen the daily percentages of increment for man covering the whole period of growth. In order to get the results together, I have confined myself here to the repre- sentation of the yearly percentages. Now from the age of zero to the age of one year, you see according to this table a child is able to in- crease its weight 200 per cent. But from the beginning of the first to 1 After Abderhalden, Zeitschrift fiir Physiologische Chemie, Band XXVL., p- 497. 206 POPULAR SCIENCE MONTHLY EARS ld?) Soa IS eT ee Ge ION 2 1S) IS) IS) 1G 17% ibe ISON ely terres cAwes Fie. 30. = YEARS | 2 3.4 8) 6 °7 08.09) iO tis 12 43 14 15° 16" We ts eoecieee mes ok Fig. 31. AGH, GROWTH AND DEATH 207 the end of the second year, only 20 per cent., and thereafter it fluctuates in the neighborhood of 10 per cent. a year until the age of 13. At 14 or 15 there is a fluctuation, an increase, and then the decline goes on again and slowly we see the growth power fading out. Authors are not agreed as to the exact statistical value, and so I will ask to have thrown upon the screen another curve, also representing the percentage increase of boys, and based chiefly upon English tables. For these data I] am indebted to my friend Professor Donaldson, of the Wistar Institute in Philadelphia. He finds in these records an increment of a little more than 200 in the first year, but the drop comes during the second year and is startling in its enormous extent and is contrasted with the later less decline. The phenomena may well arouse our attention and con- vince us that we are approaching a most important scientific question, the question of why the drop comes in this way. In the case of girls, as the next of our slides will show, we can prove the same phenomena with slightly different values. Girls, like the females of other species, grow a little less forcibly, so to speak, than boys. They do not quite 200% 100% | } YEARS t 525 Se 4 eo Ome ncee A NO. Ma AS 4: IS 16 17 IBIS) 20.2 2es ves attain a 200 per cent. value for the first year, but they too drop in a similar manner to the boys to about 30 per cent., and away down towards 10 per cent. in the third year. Then comes the long slow gradual decline up to the period of twenty-three. Professor Donaldson, as our next slide will demonstrate to us, has prepared curves from the English figures for girls also. They come up nearer to the 200 per 208 POPULAR SCIENCE MONTHLY cent. than in Miihlmann’s table, but drop well below 30 per cent. in the second year, and down to 20 per cent. in the fourth. Then occurs the slight increase of growth in the period of twelve, thirteen, fourteen years, and next the final stage of decline. In the four cases the human rate curve is similar. The great fall takes place at the beginning, the slow fall towards the end. Professor Thoma has thought he could get somewhat more accurate results by putting boys 200% 100%, | 4. 536 §7 8 “9 “Olen Ne 13) 4s ie) Viz, aie) 19) cOu lb eemes FIG. 33. and girls together, and he has made a calculation, as shown now upon the screen, of a curve in which the two sexes are combined. His figures again differ somewhat from those we have considered, but you meet in this curve also the same general phenomena. There is an enormous percentage of growth during the first year; an enormous drop during the second; then the slow decline; the moderate fluctuation upward; and then the last slow disappearance of growth. In every instance, therefore, we have an absolute demonstration, it seems to me, of the strange phenomenon. Paradoxical it will sound, whenever it is first stated to any one, that the period of youth is the period of most rapid decline; that the period of old age is that in which decline is slowest. We shall learn in the next lecture that this double phenomenon fur- nishes us a clue to further investigations, and leads to certain new inquiries, which enable us to gain some further insight into the essential nature of the phenomena of age. AGH, GROWTH AND DEATH 209 150% 100% | a | | = Hsitisee eetesoa er it Si is oe 2p se Ai SUG) eT) a6 dS io ow Ze IS 4s IS eal6ieie SIR IS) 20 MVelieecen eae 245 wes = FIG. 34. This completes the series of curves which I had prepared to present to you to show the rate of growth in animals from their birth only, but of course there has been also a growth of the animals which preceded their birth, and that now must briefly be considered. The mere inspection of developing embryos of known ages gives us some idea of the rate of growth. With the aid of the lantern I will ask you to look with me at some pictures of the developing chick and developing rabbit. Let us begin with the chick. * During the lectures a series of lantern slides were projected upon the screen, made from photographs of mounted specimens of chicken embryos, which showed very clearly the progress of development in the chick during the very early stages. The first figure illustrated a chick of 18 hours’ incubation. The embryo had been skimmed off from the surface of the egg, hardened, colored artificially and mounted in the manner of the ordinary microscopical prepara- tion in Canada balsam. At this age the naked eye can just distinguish a line, which indicates the position of the axis of the embryo. The unaided eye can recognize nothing more. In the second picture the head and neck of the embryo were easily distinguishable, and a few of the earliest primitive segments. The third slide showed a stage of a day and a half. The spinal cord and brain were distinctly differentiated, and numerous so-called “ blood islands ” scattered about, VOL. LXx1.—l4. 210 POPULAR SCIENCE MONTHLY We have first an embryo of twenty hours of incubation; following it one of one day. You can observe just a little line of structure indi- cated and showing where the longitudinal axis is to be situated. By the second day the chick has distinctly a head and a little heart, and - those who are expert can differentiate with a microscope the axis of the body, the beginning of the formation of the intestine and of the mus- cles. At the end of the first day there was lttle more than a mere gathering of cells, but during the twenty-four hours of the second day the gathering has changed from a mere streak upon the surface of the yolk to a well-formed individual, with recognizable parts and several times the volume it had when one day old. The next figure illustrates the alteration which occurs during, approximately, the third day. It is obvious that the embryo has again made an enormous increase in volume. The eye has developed, the heart has become large, the tail is projecting, the dorsal curve of the future neck is distinguishable. We pass next to the fourth day. Is it not a strange looking beast, with its wing here and leg there, a little tail at this point; an enormous eye, almost monstrous in proportion; and, finally, here a bit of the brain. After five days we have a chick the brain of which is swelling, causing the head to be of so queer a shape that, with the eye, which seems out of all proportion to the rest of the body, it imparts an uncanny look to the embryo. The wing is shaping itself somewhat, and the ends of the leg, we can see, will, by expansion, form a foot. Finally, the chick after seven and after eight days is figured. In the short interval of only six days the chick grows from the size represented by Fig. 2 to that shown in the last figure upon the plate. It is an enormous in- crease. Suppose a chick after it was born were to grow at such a rate as that! The eight-day embryo is thirty or forty times as big as it was eight days before. It would seem marvelous to us if a chick after it was hatched should become in eight days thirty times as large and heavy as when it first came out from the egg. It is perhaps advis- able to let you follow the growth of the chick a little farther, and accordingly I present another picture which shows an embryo of about ten days. The little marks upon the surface of these embryos indicate the commencing formation of the feathers. A comparison of the series of figures proves that the development is taking place with marvelous speed. We need only to look at these stages, comparing them with one another, to realize that the progress of the embryo in size and development occurs with a rapidity which is never to be found in later stages. The history of embryonic rabbits declares with equal emphasis that the earliest development is extremely rapid. I wish now to show you The final slide of the series showed a chick of three and one half days. It has not seemed necessary to reproduce these figures with the present text, as they merely duplicate, on a larger scale and with more detail, the pictures which have been included. AGH, GROWTH AND DEATH 211 Fic. 35. TEN STAGES OF THE DEVELOPING CHICK, after Franz Keibel. All the figures are magnified four diameters. In No.1 only the parts indicated in the vertical axis of the figure correspond to embryonic structures proper. No. 1. Incubated 20 hrs. No. 6. Incubated 3 days, 16 hrs. No. 2. “ 24 hrs. No. 7. - 4days, 8 hrs, No. 3. fs 2 days. No. 8. és 5days, 1 hr. No. 4. fp 2 days, 19 hrs. No. 9. we 7 days, 4 hrs. No. 5. as 2 days, 22 hrs. No. 10. Ny 8days, 1 hr. a series of pictures to illustrate in the same manner the progressive development of the rabbit. Numbers one to five of the figures upon the screen represent what is known as the germinal area, in the center 212 POPULAR SCIENCE MONTHLY of which the actual embryo is gradually formed. In No. 1 merely the axis is indicated, in front of and alongside of which the parts of the embryo are to arise, as is suggested by Nos. 2, 3, 4, 5. These stages cover the seventh and eighth days. Nos. 6 to 14 figure actual embryos, No. 6 of nine and a half, No. 14 of fifteen days. No. 6 is singularly twisted into a spiral form, the reason for which is still undiscovered. No. 9 shows the condition at eleven days—notice the limbs, a leg in front and a leg behind, each only a small mound as yet upon the sur- Fic. 36. A CHICK REMOVED FROM AN EGG, WHICH HAD BEEN INCUBATED 10 DAYS AND 2 Hours. Magnified four diameters. Atter Keibel. face of the body; the distinct eye, the protuberance caused by the heart. Nos. 11 and 12 show the embryonic shape at twelve and a half and at thirteen days—there has been a great increase of size with accompany- ing modifications of form. The next pair, Nos. 13 and 14, present us embryos of fourteen and fifteen days, respectively, and you see that the growth is very marked indeed, and the change of form obvious; the creature is now changing from the embryonic type into something resembling a rabbit. Other pictures could readily be added, but, though two weeks must still elapse before the animal will be ready to enter the world, it is not necessary for my present purpose to include this period in our survey. We need only contemplate, it seems to me, the series of drawings in Fig. 37 to realize that the early embryonic growth AGH, GROWTH AND DEATH 213 of the rabbit, like the embryonic growth of the chick, proceeds with a speed which is never paralleled by the growth during later stages. Fic. 37. FOURTEEN STAGES OF THE DEVELOPING RABBIT, after Minot’s and Taylor’s ‘‘ Nor- mal Plates.’ All the figures are magnified four diameters. Nos. 2to5 are irregular as to age, but show successive stages of development. The early development is extremely variable and the observations do not yet suffice to determine the average typical condition for each day under nine. No. 1. Embryo of 7% days. No. 8. Embryo of 10"days. No. se 84 se No. 9, “ 11 ‘ec No. fe 844 No. 10. 72 BU ies No. 5. ‘a rie ld No. 12. sf 13 = No. a 9h * No. 13. “ 14 <= le 24 oe No. 4. J 8 “f No. 11. = IDOE te 5 6. No. 7. if 10 A No. 14. As 15 a 214 POPULAR SCIENCE MONTHLY Now I had a considerable number of rabbit embryos preserved in alcohol, and though it was not very accurate to weigh them as alcoholic specimens, in order to determine their true weight, yet I resolved to do so as it was the best means at my disposal at the time. The result of that weighing was very interesting to me, because it showed that in the period of nine to fifteen days the rabbit had, on an average, added 704 per cent. to their weight daily; but in the period of from fifteen to twenty days, the addition is very much less than this, only 212 per cent. But these rabbits at ten days have already had a considerable period of development behind them, and as we have discovered that the younger the animal the more rapid its growth, we are safe, it seems t» me—since we have learned that from the tenth to the fifteenth day there is a daily increase of over 700 per cent.—in assuming that in yet younger rabbits an increase of a thousand per cent. per day actually occurs. That is not so extraordinary an assumption, for bacteria are known to divide every half hour, and if the little bacterium divides and grows up to full size in half an hour, and then divides again, it means that within a half hour one bacterium has become two, and has in- creased, obviously, 100 per cent.; and if those two again divide as before, we should have four bacteria at the end of an hour—an increase of 400 per cent., and at the end of another half hour, of 800 per cent., and so on ever in geometrical progression. We learn, then, that bacteria may in a few hours add 1,000 per cent. to their original weight, and it is not by any means an exorbitant demand upon our credulity to accept the conclusion that in their early stages, rabbits and other mam- mals and birds are capable of growing at least 1,000 per cent. a day. If this be true, and it doubtless is true, we can adopt it as a convenient basis for comparison. As we learned from the rate curves, which were projected upon the screen earlier during the hour, the male rabbit gains in one day immediately after birth nearly eighteen per cent.—seven- teen and four tenths per cent.—and the female rabbit gains nearly seventeen per cent. Now we can estimate the loss very simply by deducting this rate, which is the capacity of the animal to grow per- sisting at birth, from its original capacity, which we assume to have been 1,000 per cent. per day. And if we do that the result is obvious. Over 98 per cent. of the original growth power of the rabbit or of the chick has been lost at the time of birth or hatching, respectively, and the same thing is equally true of man. We start out at birth certainly with less than two per cent. of the original growth power with which we were endowed. Over 98 per cent. of the loss is accomplished before birth—less than two per cent. after birth. That, I think is a rather unexpected conclusion, certainly not one which, until I began to study the subject more carefully, I in the least expected; and even now when I have become more familiar with it, it still fills me with astonishment, it is so different from the conception of the process of development as we commonly hold it, from our conclusions based on our acquaintance AGH, GROWTH AND DEATH 215 with the growth and progress of the individuals about us. We over- look the fact that the progress which each individual makes is the result of accumulation. It is as if money was put into the savings-bank; it grows and becomes larger, but the rate of interest does not alter. So too with us; we see there is an accumulation of this wealth of organi- zation which gives us our mature power. But as that accumulation goes on, our body seems to become, as it were, tired. We may com- pare it to a man building a wall. He begins at first with great en- ergy, full of vigor; the wall goes up rapidly; and as the labor con- tinues fatigue comes into play. Moreover, the wall grows higher, and it takes more effort and time to carry the material up to the top of the wall, and to continue to raise its height, and so, as the wall grows higher and higher, it grows more slowly and ever more slowly, because the obstacles to be over- come have increased with the very height of the wall itself. So it seems with the increase of the or- ganism; with the increase of our development, the obstacles to our growth increase. How that is I shall hope to explain to you a little more clearly in the next lecture. We have one more slide, which I would like to show you. It indicates the rate of growth in man before birth as far as it can be indicated without better knowledge. The time intervals in the diagram correspond to the so-called lunar months—the ten lunar months of prenatal life. Of our early development we know very little so far as statistics are concerned, but from the third month onward we have some records. It is found that from the third to the fourth month the increase is 600 per cent. Just contrast that with 200 per cent. added in one year after birth; 600 per cent. in one month against 200 per cent. in one year. From the fourth to the fifth month it is scarcely over 200 per cent. It then becomes only a little more than 100. In the’ seventh month, less than 100; and finally in the ninth and tenth months, it 216 POPULAR SCIENCE MONTHLY becomes very small indeed, less than 20, so that during the prenatal life of man, as we have seen in the prenatal life of the rabbit and of the chick, the decline in the power of growth is going on steadily all the time. I shall use the few remaining moments to report to you yet another bit of evidence of the originally enormous power of growth. It has been estimated that the germ of the mammal, with which the develop- ment commences, has a weight of 0.6 milligram; another estimate which I have found is of 0.3 milligram.* Perhaps I can give you some idea of what this value means by telling you that if the weight of the original germ of a mammal is assumed to be 0.6 milligram, we could, according to the laws of the United States, send 50,000 such germs by letter postage for two cents. It would take 50,000 germs to make the weight of one letter. That perhaps will give you some impression of the extreme minuteness of the primitive germ. In the human species at the end of even a single month it is no longer merely a germ, but a young human being, very immature, of course, in its development, but already very much larger. JI doubt—even after all that I have said this evening about the startling figures of growth for the earlier stages,—I doubt if you are prepared for the fact that the growth of the germ up to the end of the first month represents an increase of over a million per cent. How much over a million per cent. we can not calculate accurately, because we do not know accurately the weight of the original germ, but an increase of a million per cent. is not above the true value. Contrast that with anything which occurs in the later periods. What a vast change has happened! What an immense loss has taken place! The rate of this loss is evidently diminishing. The Icss occurs with great rapidity in the young—less rapidity the older we become. I attempted to convince you in the first and second lectures that that which we called the condition of old age, is merely the culmi- nation of changes which have been going on from the first stage of the germ up to the adult, the old man or woman. All through the life these changes continue. The result is senility. But if, as the phe- nomena of growth indicate to us so clearly, it be true that the decline is most rapid at first, then we must expect from the study of the very young stages to find a more favorable occasion for analysis of the factors which bring about the loss in the power of growth and change as the final result of which we encounter the senile organism. Not from the study of the old, therefore, but from the study of the very young, of the young embryo, and of the germ, are we to expect insight into the complicated questions which we have begun to consider together. I shall hope in the next lecture to prove to you that the supposition which has guided my own observations is correct, and to be able to show you that we do actually, from the study of the developing embryo, glean some revelations of the cause of old age. = These estimates refer to the placental mammals only. SCIENTIFIC COMEDY OF ERRORS 217 A SCIENTIFIC COMEDY OF ERRORS Jy Proressor T. D. A. COCKERELL anp PRrROFEssoR F. B. R. HELLEMS UNIVERSITY OF COLORADO en scientific man of any period, if he will examine the work of his predecessors, may be comforted or discouraged, according to his point of view. It is in the highest degree encouraging to note the steady and rapid progress of science during the last two hundred years and more. It is flattering to the vanity of us moderns to realize that we stand on the very apex of the pyramid of knowledge which the human race has erected at the cost of so much toil, and can look down with indulgent contempt on the comparative ignorance of earlier generations. How stupid they were! How little they knew !—but we —well, there really never has been anything so superior. There is, however, an ancient story about a monkey which climbed a pole and for every three feet he climbed he slipped down two. Was the animal, after all, certainly a monkey? Is there no similarity between his progress and that of the human race? If the science of the past reads to us to-day like a comedy of errors, is it perfectly certain that our productions will not so appear to that hateful body of supercilious critics, our posterity? On second thought, there may be in the his- tory of human learning as much cause for modesty as for exultation. As a tangible case in point we present a summary of the early history of the cochineal and allied dye-producing insects, and more particu- larly of a forgotten pamphlet by one Frederic Friedel, whereby he earned the degree of doctor of philosophy at the University of Leipzig, in 1701. For his time, Friedel was a man of unusual wisdom, filled with the true spirit of science, so much so that he was not afraid to tilt against the greatest of biological authorities then living, and, in so doing, came out with a flying pennant. Yet, in the light of modern knowledge, it appears that he corrected the blunders of Leeuwenhoek only to make somewhat lesser ones of his own; not, however, through lack of care or lack of sense, but from the unavoidable imperfection of his knowledge. From very early times, it was customary to utilize the coloring mat- ter obtainable from certain small round objects to be found on various species of oaks in the region of the Mediterranean. Dioscorides and other authors report their occurrence in Galatia, Armenia, Cicilia, Spain, Portugal and Sardinia: in later times they have been known in the south of France, Crete and Syria; while the north of Africa has furnished a less valuable kind. To Theophrastus they were known 218 POPULAR SCIENCE MONTHLY 2.0.3 ee Inclyto Philofophorum Lipfienfium Ordine confentiente., - DISSERTATIONEM PHYSICAM H, LQ. Addi k,- Mart. Anno i7ot. Placido Eruditorum Examini publice fubjiciet PRESES M.CHRISTOPH. FRIDERICUS Ridter/ Lipfienfis, RESPONDENTE ERIDERICO Sriebdel/ ScaudizaeCiz. Mifn.. ~ Med. Cult. Pl PS 15 Excudebat CHRISTOPH, FLEISCHERUS. as the xoxxos gouxos, While in later times the name Kermés, from the Arabic, came into general use. For many centuries the nature of the Kermes remained uncertain. To all appearances it was a berry, and the opinion that it was of purely vegetable origin prevailed. However, it appears that Quin- queran de Beaujeu, as early as 1551, published a book on the pro- ductions of Provence, entitled De Jlaudibus Gallo-Provincie, in which he clearly indicated that the Kermes was an insect, and de- scribed its transformations. ‘The supposed berries, says he, are the mothers, who presently have families of innumerable very minute worms. ‘These latter locate upon the twigs at various points, increase in size, and at length look no longer like animals, but peas. Planchon, to whom we are indebted for the reference to Quin- queran, goes on to remark that it is curious that after these observa- tions had been published, many intelligent writers showed hopeless confusion upon the subject. In particular, it had been observed that from the Kermes sometimes issued small four-winged insects not un- like those coming from the oak-apples or galls. Hence it was con- cluded that the Kermes must be a sort of plant gall, wholly made up of SCIENTIFIC COMEDY OF ERRORS 219 vegetable tissue, but nourishing an insect. We know now, of course, that the four-winged insects were merely parasites of the Kermes, which lived as minute maggots within its body, destroying it and finally issuing as adult flies. With the discovery of Mexico, things took on a new turn. Fran- cisco Hernandez and others reported that on the tuna, or prickly pear, of that country there grew a new sort of coccus, which was much to be preferred to the one found upon the oak, or to the scarlet grain found upon the roots of plants in Poland. This new coccus, which came to be known as the cochinilla, or cochineal, was largely imported into Europe; and eventually the cacti were brought over, and grown in Algeria, Madeira, etc., so that the dye-material could be produced nearer the market. With the impetus thus given to the study of coccus—or, as we should now say, the Coccidee—the question as to the true nature of the material pressed anew for settlement. According to the “ Encyclopedia Britannica,” the idea that the cochineal was the seed or fruit of a plant was prev- alent as late as 1725, but Martin Lister, in 1672, indicated its rela- tion to the insects. In 1703, it is stated, Leeuwenhoek discovered its true nature by the aid of the microscope, “but not unnaturally sup- posed it to be allied to the ladybird.” This statement of the case, however, is not quite exact. We have before us a little pamphlet published as early as March, 1701, the precise date, according to a penciled figure, being the fourteenth of that month. This work is a thesis for the degree of doctor of phi- losophy, presented to the University of Leipzig by Frederic Friedel, and is entitled Dissertatio Physica de Cochinilla. In it, the whole question of the nature of the cochineal is fully discussed, with copious references to previous authors and many original observations. The work consists of six chapters; the first on the name of the cochineal ; the second on its habitat and the plants infested, with some interesting information on the different kinds of cacti; the third on various opinions concerning the nature of the cochineal; the fourth giving the details of the author’s views as to its nature; the fifth on its culture and the methods of collecting it; and the last on its different varieties and its uses. The whole treatise is, of course, in Latin, but we give a free translation of the parts with which we are particularly concerned, abbreviating here and there. After giving a general summary of the hitherto recorded observa- tions and opinions, Dr. Friedel proceeds: Therefore, this insect is a Coleopteron [beetle], so to speak sheath-winged, or in a word, belonging to the family of lesser scarabs, which we recognize by the almost round body, flat below and convex above, not less than by a reddish and golden color, sprinkled with some black spots. He then proceeds to set forth the names for the ladybird in dif- 220 POPULAR SCIENCE MONTHLY ferent languages, bringing out the fact that these creatures are dedi- cated to Our Lady, the Virgin Mary, or in other cases to God, for reasons not explained. In France they are called God’s horses, Chevaux de Dieu, in England ladybirds or cowladies, and so forth. To these familiar ladybirds, such exact resemblance is borne by the little animals which produce the coch- ineal, that one egg could scarcely be more like another, if only you except the size, in which the American beetle is observed to surpass ours, and the color, which is not vividly red or scarlet or yellow in the foreign species, but dull and brownish, with the spots red, the latter larger than those on our beetles. The modern entomologist begins to wonder what all this has to do with SCIENTIFIC COMEDY OF ERRORS 221 the cochineal, which is by no means a beetle, though truly an insect, but the author proceeds: Moreover, these statements that I have made about the form and appearance of this beetle, that they may not be accounted the mere offspring of my brain, can all be easily verified by actual examination; for dry specimens, complete, generally, however, with the head and feet torn off, are found mixed with the cochineal; or at least, as happens more commonly, elytra are brought out along with the cochineal grains. I myself have found several points concerning these little animals, complete or intact “for the most part, which exactly agreed with those just described, so that all occasion for doubting the truthfulness of the facts has been removed. With this description, aided by an excellent figure given in the one plate which ornaments the pamphlet, we are able without difficulty to explain the mystery. The American beetle is the Chilocorus cacti, a genuine ladybird, which does indeed live upon the tuna among the cochineal insects, feeding upon them. When the latter are gathered, the beetles are often carried with them, and Friedel, examining the dried grains, naturally found the specimens he describes. In 1701 not much was known about the classification of insects, and it never occurred to him that a creature like the cochineal, which we now know to have a sucking mouth, could not be related to a beetle. Yet, aware that scoffers exist, the author is constrained to proceed: Howbeit, if this evidence of mine should not find full credence, look you! here is Paulus Ammannius, who in his handbook to Materia Medica reports that he also found such a little animal intact; and if perhaps he is not sufficient authority either, take Leeuwenhoek and Tyson, of whom the former depicts little insects of this type, found by him likewise, and the latter even gives an engraving on copper of a cochineal scarab, and when you have compared the figures, you will agree that it is as closely similar as possible to-mine. In the appended plate, I offer one of those that I happened to find, along with our nettle beetle [that is, the European ladybird, Adalia bipunctata], because the difference, as well as the resemblance between them, will thus better meet the eye. I willingly omit the references to other authors, such as Blanchard (Schauplatz der Raupen) and Dale (Pharmacology), for the two just mentioned, Leeuwenhoek and Tyson, are for me equivalent to all. Friedel then proceeds to combat an opinion, which he attributes to Leeuwenhoek and an anonymous Spaniard mentioned in the English Transactions (of the Royal Society) No. 193, to the effect that the cochineal is a portion of the adult American ladybird—the Chilocorus cacti. For it is disproved oy ocular examination, that the lower belly of this beetle, if it shall have been stripped of its legs and head, and finally of its elytra and wings, as indicated by Leeuwenhoek, exactly resembles the cochineal. Rather, the form of these hinder parts of the insect differs as much as possible from the little body of the cochineal; seeing that in the first place, in size it generally very greatly surpasses the lower belly of the beetle, as I have found in more 222 POPULAR SCIENCE MONTHLY than one case when I have removed from the intact beetles found among the cochineal the parts just mentioned; and in the second place, I have noticed this marked discrepancy, the abdomen of the beetle is never marked by more than six or at the most seven distinct rings, but the number of these in every grain of cochineal generally runs as high as 12, as can be seen with the naked eye, or more distinctly with the aid of the microscope, especially if the insect has been softened in water. Furthermore, a third difference will be noticed at the same time—you will certainly observe the anterior half of the cochineal to be furnished with some little swellings, beneath which lurk the feet of the insect which are going to appear, and which the engraver has tried to show in the cut. On the other hand, that the hinder parts of the beetles are always entirely devoid of these swellings an examination places beyond limits of doubt. Add to all these the fourth circumstance that the abdomen of the beetle does not produce any purple color, and for that reason could little serve the purpose for which this ware is imported from such distant shores. Although I subjected certain of these trunks of the lower belly to different treatments, I never was able to see even a tiny point of the desired color in them, while conversely, any tiny cochineal will discharge the color in sufficient abundance and at once. And finally, I have never been able to find in the belly of the beetle a single little grain or egg, although I sought most zealously; whereas such are found in great abundance in any cochineal which is broken up after having been suffi- ciently macerated. What an excellent argument! It is proven beyond doubt that the cochineal is no part of the ladybird, notwithstanding the assertions of the most eminent authority then living. We have no fault to find with particulars given, except that the little prominences on the coch- ineal, where the legs were hereafter expected to appear, were in reality the bases of the minute legs of that insect. Returning now to the constructive argument, the author gives his conclusion that the cochineal must be derived from the aforesaid beetles, and yet is not any part of them. The simple explanation is that the cochineal, when mature, transforms into a beetle, and in doing so utterly loses the power of staining, and hence is no longer to be termed a cochineal. Now this loss of color at maturity is paralleled by other phenomena already recorded. In the case of the dye-coccus of the oak, the Kermes, so long as the little berries are full of little worms or animals, they are rich in the colored juice. After a while, when the little worms [the larve of the Kermes, in reality] are called by the heat of the sun from their sacs [that is, the bodies of their moth- ers| they can be destroyed by the pressure of the hand, and forced into a mass which is appropriately termed vermillion. Otherwise, before the exclusion of the worms, the dried berries will equally preserve the desired color. It is just the same in the coccus polonicus [Margarodes polonicus of modern entomologists], which is said to cling to the roots of several herbs. These little bodies at a stated time turn into little winged insects, as is stated by several authors, including Martin Bern- hard in his description of the Royal Garden of Varsovie. As soon as SCIENTIFIC COMEDY OF ERRORS 223 these insects [probably males of the Margarodes| fly away, they are manifestly deprived of all color, and not only this, but the cortex which is left retains nothing of the precious coloration. So, says Friedel, since in all these different sorts of coccus the red color disappears in the last stage, when the creature is transformed into a fly or some other little animal, it is easy to understand why the beetles produced from the cochineal show no red pigment. The point is important, because it is necessary that the cochineal should be collected in time, before its last transformation, and while it is still swollen with the juice. The analogy is here not very convincing, since the Kermes does not turn into a single insect, but produces a multitude of “ worms,” as Friedel clearly states. It seemed sufficient to him, however, and he never got a glimpse of the true fact that the cochineal insects do indeed turn into the beetles, in the same manner that the lamb may be said, under suitable circumstances, to be transformed into the lion. Assuming that the cochineal was the pupa of the beetle, it re- mained to fortify this conclusion by still other arguments. In the first place, Herrera and Laetus had given some slight account of the development of the cochineal, from actual observation. From this it might be gathered that there was at first a minute or mite-like insect, which developed into the cochineal-grain. This accords very well, so far as it goes, with what was to be expected according to the theory. “That grain is covered on the outside by a certain thin tunic, which contains shut up within it the little animal, which is soon to be trans- formed into a beetle *—this is, however, an inference of Friedel’s, not of Herrera’s. “But,” says Friedel, “for a more beautiful illustration of my hypothesis, I thought I might describe the transformation of the European ladybird, which is certainly sufficiently allied to the Ameri- can to permit accurate deductions to be drawn from it.” So he went first to the book on insects by John Goedart “that very illustrious painter of Middleton,” a work which several years back Martin Lister had published in a new and revised edition. In this work, p. 274, it appeared that first from little blackish eggs deposited in a sort of circle on the leaves of the Ribes [currant or gooseberry], there sprang, © from the nurturing of the summer air,” little animals, which immedi- ately after hatching could scarcely move, until after an interval of several days they learned to creep a little, and finally to run about freely. ‘These insects were subsequently. observed to shed their skins, like serpents, as they increased in size, and this was done four distinct times, and last they obtained the final red skin, variegated with black spots. To these statements the author added that as often as these beetles stripped themselves of their skins, they fixed their feet firmly in the place they occupied, and crept out, leaving the empty skin in its 224 POPULAR SCIENCE MONTHLY natural form, so that at the first glance you would swear the little animal was still standing there. “Now,” says Friedel, “ As I read this, it can scarcely be told how saddened I was, for the hope I had previously conceived was falling into ruin.” The account of Goedart did not really seem to confirm the hypothesis about the cochineal, for there was no description of any stage that really corresponded to the grain. Friedel was about to change his opinion in toto, when he “had another seasonable sugges- tion from the most excellent Dr. Lang, to whose most faithful train- ing I owe almost everything in the course of my medical studies.” For as Dr. Lang was the first to suggest to Friedel the theory about the nature of the cochineal which formed the subject of this thesis, so he now came to the rescue with facts and experiments concerning the German ladybird “ depicted as in life with an elegant brush in colors, and most accurately noted from day to day,” all of which, in the year just passed, Friedel was permitted to observe and confirm with his own eyes. Sure enough, in the month of June, on the upturned leaf of the greater nettle, are seen very tiny egglets of a saffron color, adhering firmly. As may be seen in our illustration, letter g, from these, a little later, are spontaneously hatched blackish oblong little worms, below the size of a flea, but equipped with six feet on the anterior part of the little body, see letter h. These little insects are sluggish for some time after their birth, and scarcely move from their place; until, after the lapse of several days, they acquire the necessary strength, and running hither and thither, gather food, so far as we can see, from dew. [They feed on aphides, but Friedel neither observed this, nor considered the fact that mere dew was rather unsustaining!] After about three or four weeks have elapsed, they reach a size such as is indicated under letter i. At this time, they are elegantly ornamented on the sides with several yellowish spots, and their color, dark before, is changed to an ashen hue, especially along the middle of the back. Now this fleet-footed worm prepares itself for a metamorphosis, wan- dering more tardily at first, soon hardly at all; and then, affixing itself by its tail to a leaf, is wrinkled up as shown under letter k. By degrees the covering drops off to the rear, and it passes into the pupula or nymph, of which the anterior and posterior aspects are shown under letters 1 and m. The insect, even in this state, still lives, as may be learned from its movement when touched. It remains thus until the tenth and not rarely the twelfth day, when the covering is broken, and there comes forth, the skin being left motionless, a beetle, which at first is rather weak, and whitish, but changing in a few hours to yellow or red, the black spots coming into view on the elytra. This is really an excellent account of the ladybird, excepting only the error as to its food, and from these observations Friedel felt en- couraged to believe that he had put the finishing touches on his theory of the cochineal; for was not the ladybird pupa just like it? “ But,” says he, “if perchance this should still seem doubtful, here is a further observation to confirm it. When a friend, addicted to trade, gave me at one time a large enough heap of cochineal to examine, I SCIENTIFIC COMEDY OF ERRORS 225 found mixed with it several worms, not yet altogether changed into. pup, of a color which from ashen was becoming purple, and which when immersed for a while in water, assumed the form seen in the engraving under the letter C. Hence there came to me the suspicion that under this form appeared the worm of the cochineal before giving itself to rest; for that it certainly belongs to this family, I am per- suaded by the purple color which it discharges into the water in which it is immersed, just like the cochineal itself. For when all the eggs of these insects are not hatched in one precise day it at least be- comes probable that neither are all these worms in one moment trans- formed into pups», or the beetles simultaneously creep forth from these. So, without doubt, when the harvest of pupe is at hand, several of these worms, which have not yet reached the pupa state, and also several adult beetles, are shaken off at the same time from the tuna. Consequently, we usually find them all mixed, in more or less abundance, with the best cochineal.” The worms thus found may be the true larve of the ladybeetle, or in other cases, the larvee of certain two-winged flies of the family Syrphide, which also prey upon the cochineal. ‘The presence of the flies is especially indicated by another observation of Friedel’s—that he found even a few cup-shaped objects, in which were occasionally seen some small grains of cochineal. Here, he thought, were actually the skins left empty after the exit of the beetles; but on further reflection he abandoned the idea, as they really were not large enough to hold the beetle. The grains found in them were very minute, and were doubtless only cochineal larve which had wandered in by accident; and finally, some of these cups still con- tained, not a beetle, but a single fly. These were, we may now rest assured, the puparia of a predatory Dipterous insect, either a Syrphid or a species of Leucopis. By the time of Linneus, some fifty years later, it was clearly known that the cochineal had nothing to do with the beetles, but belonged to the Hemiptera. Even then, however, it seemed fated to be a source of error and misunderstanding. When Linnezus was pre- paring his great “ Systema Nature,” a friend of his, Daniel Rolander, resident in the West Indies, sent him what he supposed to be unusually fine specimens of the cochineal alive on a piece of cactus. Linnzus naturally used these in making his description of the Coccus casti, and until 1899 nobody seems to have suspected that they were not the real cochineal. However, Rolander sent some at the same time to DeGeer, who figured them, and from the account he gives, and indeed also from that of Linnzus, it is evident that the Coccus cacti L. is no cochineal, but a species of a quite different subfamily, which, curiously, has never been found by any entomologist since it was discovered by Rolander. VOL. LXx1.—15. 226 POPULAR SCIENCE MONTHLY NOTES ON THE DEVELOPMENT OF TELEPHONE SERVICE By FRED DELAND PITTSBURGH, PA. XIV. TELEPHONIC AND FINANCIAL ConpDITIONS, 1880-1883. #K OLLOWING are the Bell statistics for the four years, 1880-1883: On March 1, 1880, there were 138 Bell telephone exchanges, in operation or about to open, while a year later the number had increased to 408, a net gain of 270 exchanges, or of nearly 200 per cent. Though only three years had elapsed since the first of these pioneer exchanges was opened, on March 1, 1881, 66 exchanges were interconnected by toll lines, Boston had toll communications to seventy-five cities and towns, the total number of places for which licenses to build exchanges had been granted was 1,523, and thirty-two contracts had been given to build connecting toll lines. But, these 408 exchanges supplied tele- phone service to only 47,880 subscribers located in 463 cities, towns and villages, or an average of only 117 subscribers to each exchange. At the close of the year 1881, the number of Bell exchanges had increased to 592, with a total of 70,525 subscribers, located in 1,593 cities, towns and villages, while the average number of subscribers per exchange had increased from 117 to 120. On December 31, 1882, there were 1,070 Bell exchanges in opera- tion, a net gain of 478 for the year, or of 81 per cent. This growth represented an average increase of two new exchanges for nearly every working day in the year. Yet the total number of subscribers was only 97,728, or an average allotment to each exchange of only 91, that is, 29 less subscribers than the average of the previous year. The handiwork of the speculative builder of small exchanges, grasping for quick profits, is here indelibly imprinted on the records. In the large exchanges the high flat rate limited the growth to the wealthy in the resident districts and to the larger business houses and pro- fessional offices where telephonic communication was an absolute neces- sity. This seems a reasonable conclusion to draw from a growth of only 38 per cent. in subscribers and of 81 per cent. in exchanges. And the record for 1883 is of the same delusive character. On December 31, there were 1,325 Bell exchanges in operation in 46 states and territories, supplying service to 123,625 subscribers, and giving employment to 4,762 persons. In other words, there was an average of nearly four employees to each exchange, though the aver- THE DEVELOPMENT OF TELEPHONE SERVICE 227 age number of subscribers connected was only 93. And as there were many exchanges having more than 300 subscribers, it is obvious that many others had less than 30, and thus were being operated and main- tained at a continuing loss. What were the financial conditions of the country during these four years, 1880-1883? What was the character of the sentiment prevailing among investors that enabled such anomalous conditions to continue? The year 1880, notwithstanding that a presidential election occurred, proved to be an admirable period for the promotion of industrial as well as speculative enterprises, and telephone projects of every char- acter appeared to meet a hearty welcome at the hands of the investing public. To the older licensees, enriched by the wisdom gained in a whole year’s experience, it soon became evident that many of the new exchanges were being built and operated only for speculative purposes by local promoters, in anticipation of profitable consolidations, rather than as a permanent investment for local capital. For the question of equitable rates yielding a fair return on a legitimate investment, or the unpleasant results in lowering the character of the service by giv- ing unlimited calls at an unprofitable rate, thus loading the lines with gossip and frivolous conversation, to the detriment of rapid, legitimate service, did not concern the speculator. Where the older licensees endeavored to warn local investors against accepting the speculator’s statements without substantial proof, the latter felt justified in agi- tating a public denunciation of what he termed the extortionate rates of the older licensees. The natural result was that the specu- lative exchanges had a big list of subscribers at unprofitable rates, until consolidation brought a new management that proposed to take care of the shareholders first and then give the best service possible to the subscribers. This meant an increase in rates to an amount that would insure a fair return on the investment; and then fully one half the subscribers who had been reaping the advantage of unprofitable rates promptly displayed their gratitude by giving up the service rather than pay the increased price. On January 21, 1881, many of the telephone companies in the east suffered from the most destructive sleet storm that had visited that section in a long period. So great was the weight of the sleet frozen on the wires attached to roof-fixtures that in numerous cases the roofs were wrecked and walls were damaged. Miles of the pole lines went down, and in the main thoroughfares of the larger cities telephone wires were inseparably entangled with telegraph and electric light circuits. By reason of modern methods of construction, a disaster of such a character could not now occur, though greater losses have occurred in several sleet-storms. But this was the first serious wreck 228 POPULAR SCIENCE MONTHLY. of the kind that the new telephone industry had had to face, and its disastrous outcome was exceedingly discouraging. The immediate loss to the New York company was nearly $100,000, while the indirect loss in delaying extensions and improvements and in diverting invest- ment from the treasuries of the injured companies was very large. The only remarkable change in financial circles occurring in 1881 was the flurry in the stock market that followed the assassination of President Garfield on July 2, 1881. To the far-sighted financier that “agitation approaching a panic” may have indicated the beginning of the general depression that gradually overspread the country and proved most severe in 1885. On July 14, 1881, the New York Tribune editorially asserted that the agitation that cavsed the flurry was utterly without foundation and that the proportion of business done upon a cash basis is larger than ever, and the proportion of business done without borrowing, on the capital of the firms en- gaged, is larger than ever. ... Nor has there ever been a time when the earn- ings of the people were on the whole as large as they are now. Wages are good, while prices are relatively low. But from the telephone speculator’s point of view, the ill effect of that July flurry was more than offset, so far as the investing public was concerned, by the admirably wise and now famous telephone de- cision rendered by Judge Lowell on June 27, 1881, in the suit begun on June 22, 1880, in the Eaton-Spencer case. In part that opinion read as follows: If the Bell patent were for a mere arrangement, or combination of old devices, to produce a somewhat better result in a known art, then, no doubt, a person who substituted a new element not known at the date of the patent might escape the charge of infringement. But Bell discovered a new art—that of transmitting speech by electricity—and has a right to hold the broadest claim for it which can be permitted in any case; not to the abstract ~ight of sending sounds by telegraph, without any regard to means, but to all means and proc- esses which he has both invented and claimed. . . . The claim is not so broad as the invention... . An apparatus made by Reis, of Germany, in 1860, and described in several publications before 1876, is relied on to limit the scope of Bell’s invention. Reis appears to have been a man of learning and ingenuity. He used a membrane and electrodes for transmitting sounds, and his apparatus was well known to curious inquirers. The regret of all its admirers was, that articulate speech could not be sent and received by it.... A century of Reis would never have produced a speaking telephone by mere improvement in con- struction. President Arthur proved a worthy successor to the lamented Gar- field, and his strong and conservative policy appeared to win the confidence of the people, many of whom had been led to expect a more radical and less safe administration. Thus the year 1882 opened THE DEVELOPMENT OF TELEPHONE SERVICE 229 auspiciously for all speculative interests. But in February came the notorious break in Richmond and Danville, from 219 to 130, that flurried the stock market and increased the general uneasiness con- cerning all investments. Nevertheless, the total volume of business transacted throughout the country during the year was very large, no less than $350,000,000 being expended in new railroad construction. The general financial and commercial conditions that prevailed during 1883 may be summed up as follows: There were 9,184 failures with aggregate liabilities of $172,874,000, as against 4,735 failures in 1880 with aggregate liabilities of only $65,752,000. Not only was there a large decrease in the total volume of trade, making retrench- ment in nearly every line of industry an imperative necessity, but a general distrust of the integrity of all stocks and all bonds prevailed, with a consequent enormous decline in the market values of many securities, including even those of the new telephone consolidations. An eminent financial writer in referring to the speculative fever that had raged during the previous two years, 1881-1882, declared that: Our whole people became wild upon the subject of railroad construction, be- lieving that two or three dollars could easily be made for every dollar put up, either by the success of their ventures or by the sale of their securities. In this delusion the capitalist and the adventurer shared alike. Nevertheless, notwithstanding these discouraging conditions, or the gloomy outlook for the coming year, or the nine thousand failures in other lines of business, or the low market value of the stock of certain large licensee companies organized to absorb the handiwork of the speculator as portrayed in numerous small and unprofitable ex- changes, the art of establishing new telephone exchanges, especially in small towns and villages, progressed even more actively in 1883 than ever before. So many investors believed that it was only necessary to establish any kind of an exchange in any kind of a village, no matter how small or how unprofitable the rates might prove, to secure profits of three for one, that the editor of an electrical journal wrote: “ No fable concerning the telephone is too gross to receive credence; no prediction of its future can be wild enough to provoke a smile.” And the daily papers fed this delusion by constantly referring to millions of dollars alleged to have been made in the telephone business, although the parent company had paid no cash dividends prior to January, 1881, all of which statements many readers accepted as applying solely to exchanges established in small villages, just as three years earlier many investors believed that large profits would be derived from building small branch railroads. And had it not been for the many investments made by farmers in railroad securities, in the aggregate amounting to several millions of dollars, from which no return was secured in many cases, it is quite probable that the farming community 230 POPULAR SCIENCE MONTHLY would have developed a rural system of telephone service contempo- raneously with its early growth in towns and villages. Again, the infringing telephone companies, and they were numer- ous, while their promoters were strong in political and financial influence in the ’80’s, circulated the most absurd statements concerning the millions that had been made in the consolidating of Bell operating companies, and the manipulation of telephone stocks. One state- ment read: “It is within limits to say that the entire property, rights and franchises of the Bell company and its licensees could be duplicated for one twenty-fifth of the stock capital invested.” Yet it is interest- ing to note that during the three years, 1881-1883, in New York state alone, one hundred and twenty-five infringing telephone com- panies were organized and capitalized at an aggregate of two hundred and twenty-five millions of dollars, a capitalization authorized by one state only, and three times greater than the combined capital stock of all the Bell companies in all the states of the union, including that of the parent company. Very fortunately for the investing public, few of these infringing companies ever got fairly under way, even when the highest officials in state and nation appeared to do all in their power to aid in filching rewards honestly won and meritoriously bestowed. Moreover, it has been stated that many of these infringing claims were offered to the parent Bell company for small sums or large sums, depending upon how gloomy or how roseate the outlook was. A comical phase of these infringing competitive schemes was the certainty with which state- ments would appear in printed circulars, that the telephone was first exhibited to the public at the Centennial Exposition in 1876, and the first telephone line was constructed in Boston in 1877. The fact that they thus admitted that Alexander Graham Bell’s telephone was the first telephone did not appeal even to their sense of humor. Even the announcement on January 24, 1883, of Judge Gray’s decision on final hearing in the Dolbear case, and of Judge Lowell’s decision the following August, did not appear to discourage investment in the securities of infringing companies, while both decisions served to stimulate the building of small exchanges by speculative promoters and the rapid consolidation of these non-paying properties into over- capitalized organizations. Judge Gray’s opinion in part was: The opinion in Spencer’s case clearly points out that “ Bell discovered a new art—that of transmitting speech by electricity—and has the right to hold the broadest claim for it which can be permitted in any case.” ... The evidence in this case clearly shows that Bell discovered that articulate sounds could be transmitted by undulatory vibrations of electricity, and invented the art or process of transmitting such sounds by means of such vibrations. If that art or process is (as the witnesses called by the defendant say it is) the only way THE DEVELOPMENT OF TELEPHONE SERVICE. 231 by which speech can be transmitted by electricity, that fact does not lessen the merit of his invention, or the protection which the law will give to it.... Whatever name may be given to the property, or the manifestation, of the elec- tricity in the defendant’s receiver, the facts remain that they avail themselves of Bell’s discovery that undulatory vibrations of electricity can intelligibly and accurately transmit articulate speech, as well as of the process which Bell in- vented, and by which he reduced his discovery to practical use; that they also copy the mode and apparatus by which he creates and transmits the undulatory electrical vibrations, corresponding to those ‘of the air. On August 25, 1883, the opinion of Judge Lowell on final hearing was delivered in part as follows: I decided in American Bell Telephone Co. v. Spencer, 8 Fed. Rep. 509, that Reis had not described a telephone which anticipated Bell’s invention. The same point has since been decided in the same way in England. United Telephone Co. v. Harrison, 21 Ch. D. 720. It is admitted in the present case that the Reis instrument, if used as he intended to use it, can never serve as a speaking tele- phone, because the current of electricity is constantly broken; and it is essential for the transmission of speech that the current should not be broken. The de- fendant (Dolbear) now testifies that the Reis instrument can be made to trans- mit speech, under some circumstances, if operated in the way which Bell has shown to be necessary. In 1877, he several times expressed the opinion that Bell made the invention, and that Reis did not make it. The experiment made in the presence of counsel, which was intended to prove the correctness of the de- fendant’s present opinion, was an utter failure... . At the former hearing in this case before Mr. Justice Gray and me, we decided that the defendant (Dol- bear), whatever the merits of his telephone may be, employs in it a part, at least, of Bell’s process. No additional evidence has been given at the final hear- ing, unless a further explanation of that already given may be called additional; and I remain of the opinion expressed by the presiding justice at that time. Telephone men were not alone in their realization that self-preser- vation lay in concentration. For financiers were beginning to per- ceive the wisdom in the original plan of one great company, to also realize how dependent the future growth and development of the industry was on a centralized policy, and to foresee that the product of unity in purpose, in method, in management, would be serviceable to users and profitable to investors. It was already evident that telephone service had come to stay, that it was an important aid in the transaction of business in every line of industry, and that it was certain to have a revolutionizing effect on many phases of industrial, commercial, professional and social life. In its annual report for the fiscal year ending February 28, 1883, the parent Bell company said: From the local companies throughout the country the reports are encour- aging. Most of them are now earning and paying dividends, and extending their business with energy. An important feature has been the consolidation of local telephone interests into large companies, covering many counties, and even in several instances the whole or the greater part of entire states. This policy has 232 POPULAR SCIENCE MONTHLY been assented to so far as its adoption seemed in the interest of convenient and economical management, but it should not be encouraged to an extent that would leave these companies entirely in the ownership of persons who are not residents in the territory where the business is carried on. It has always been our policy to keep local capital and influence interested in the business as far as possible, and to this course may probably be attributed a good part of the success which has attended the development of the business. A year later the parent company reiterated the foregoing con- clusions concerning care in consolidating companies and added: In spite of the prevailing opinion that the development of the telephone substan- tially under one control is against public interest, we believe that an intelligent examination of this question would demonstrate that this is not true and that in no other way could the desired results be obtained and the difficulties be surmounted so rapidly and so well as by the present one. Like the previous year, 1883 was a year of mergers; and when this two-year period closed, the number of Bell companies had been reduced, through absorption or consolidation, from several hundred to less than one hundred, and the parent company was gradually getting into a position where it could strongly influence the policy that should prevail. In some states practically all the exchanges were absorbed by one strong company; in other states three or four companies aided in bringing about the consolidation, and then divided the territory. For instance, in the summer of 1882 the daily papers told how: New York and Philadelphia capitalists are visiting various sections of Penn- sylvania with a view to consolidate all local telephone companies between New York and Pittsburgh into one general organization, with main offices in New York, Philadelphia and Pittsburgh. While the promoters failed in consummating so big an undertaking, their efforts paved the way for consolidations more limited in scope. In Massachusetts a combination known as the Lowell syndicate was quite successful in consolidating many exchanges, some of which will be more fully referred to in a following chapter. Referring to the numerous consolidations of small local licensee companies into new organizations chartered to work on broader plans, the parent Bell company in its annual report for 1883 stated that: the tendency towards consolidation of telephone companies noticed in our last report has continued and is for the most part in the interest of economical and convenient handling of the business. .. . As methods are devised for making the telephone commercially useful over long lines, the advantages of this cen- tralization of management will be still more apparent, as well as the importance to the public of having the business done in large territories under one re- sponsible head, with far-reaching connections throughout the whole country. To make this service of the highest value io the people will be complicated enough under one control. Were it in the hands of many competing companies, the confusion resulting would be very serious, as the value of the telephone will be largely measured by its capacity to give prompt connection with all parts of the country. THE DEVELOPMENT OF TELEPHONE SERVICE 233 The parent company also held that the securities issued by its operating companies ought to represent legitimate values, not specu- lative or estimated values based on what the plant might earn in the future; that the intrinsic value of the telephone securities should be made clearly apparent to investors, and that the established integrity of the investment should be maintained by providing ample sinking- funds and reserves to cover every contingency. Its expressed policy was: to encourage payment of dividends by local companies with a view to getting local influence and capital interested in telephones, but it never encouraged the payment of dividends except when earned. Such conservative methods were not in accord with the sentiments of speculators who preferred to experiment with the credulity of thoughtless investors, so long as such experiments yielded rich profits. The people believed the newspaper stories about the fabulous profits small telephone exchanges were deriving from limited investments. Then why destroy such honest beliefs by presenting cold facts? Con- solidation of exchanges was a good thing; it meant large profits for the promoters. When these local exchanges were transferred to the management of the new organization, it was quickly perceived that many sub- scribers were receiving service at rates involving constant loss to the company, as already stated. An increase in rates naturally followed, which, in turn, resulted in some of these low-rate subscribers discon- tinuing the use of the service. Sometimes from 25 to 50 per cent. of the subscribers to these consolidated exchanges would drop out, and the loss in the income anticipated from these subscribers upset many plans. For most of these new organizations, in expectation of being able to readily dispose of the new securities, had proceeded to recon- struct the old plants absorbed with a view to giving a higher class of service and of promptly and properly handling a large increase in the number of subscribers. 'To meet the indebtedness thus incurred it was necessary either to sell shares of stock at a price considerably lower than the authorized price, or else to settle the indebtedness with the funds set aside for dividend payments, and in lieu of cash payments to shareholders to issue stock dividends. Again, this inability to raise the funds necessary to make needed extensions and improvements and to keep pace with the growing demands of the public, meant that for an indefinite period the gross earnings must provide for all con- struction and reconstruction, as well as for the operating and main- tenance charges. In other words, in 1883-1886, until improved financial conditions permitted the sale of telephone securities at rea- sonable prices, growth and progress were necessarily limited within narrow lines that yielded sure returns to the holders of stock certifi- cates. 234 POPULAR SCIENCE MONTHLY THE HEALTH OF AMERICAN GIRLS By NELLIE COMINS WHITAKER, SALEM, MASS. N a paper, ‘Alumna’s Children,’ published in this magazine in May, 1904, the wish was expressed that some one might determine how far ‘ the way in which our girls go to school’ governs their health in later life. This article is an attempt to consider that question. To any one familiar with all that has been written on the health of American women the subject must seem exhausted in one sense at least. As one reads the different monographs giving the cause of woman’s physical weakness, each writer dwelling upon some one condition which is of itself entirely sufficient in his opinion to overthrow her health, one can but think of the man who committed five murders and was con- demned to be put to death five times. Yet perhaps there is a word more to be said. A large proportion of the papers have discussed college students or adult women and almost every serious consideration of the health of the schoolgirl has been by a physician and necessarily from his point of view. A girl is more fully and more normally known to her mother and her teacher than to her doctor; they observe all the influences of her life as he can seldom do. For some reasons a wise mother would seem to be the one best fitted to speak on this matter; she should know more intimately than any one else the nature of her daughter. But the mother is limited to the conditions that have operated in her own family. ‘The daughter’s teacher learns the per- sonality of the individual girl with a thoroughness second only to that of the mother and she knows just as intimately scores of other girls who have grown up under vastly different conditions, so that she is able to draw general conclusions as the mother of one or two can not do. I have not come upon any full discussion of the health of our girls from the teacher’s point of view; it is this that I shall try to present. The delicacy of our American women, noted abroad and admitted at home, is coming to be a tremendously vital question. The condition apparently is peculiar to no class and it appears in the second genera- tion of other nationalities immigrating here. Lack of fecundity is only one of its indications. Does it not seem to you that most of the women whom you know confess that they are ‘not very strong’? Nervous exhaustion and what the newspaper advertisements call ‘ womanly weaknesses’ are the most common ailments, but there seems to be in women far more often than in men a lack of general vitality, an inability to resist disease. THE HHALTH OF AMERICAN GIRLS 2K This state of affairs is generally admitted, but there is no evidence that it was nature’s original plan. On the contrary, there is reason to believe that the woman was meant to be quite as strong as the man; nature has ordained the hardest tasks for her, and has given her a wonderful equipment for them. Among primitive races the woman is fully the equal of the man in strength, his superior in endurance. Superior in endurance in certain respects she remains even under modern conditions, as dentists and surgeons bear testimony. But where has gone the vigor that she requires to meet the demands that life _ makes of her? Is it the schools and the teachers that are responsible for its loss? I was moved anew to thought on the subject by seeing last June the Ivy-day procession of a woman’s college and the next week the graduating exercises of a large high school. The college girls looked notably robust, sunburned as to cheeks and arms and hair, but attractive for their evident health. They seeemed far above the average Ameri- can women in their physical vigor and did not lead one to believe that a college education makes invalids. The girls in the high-school class —the man beside me, himself the father of one of them, expressed their appearance adequately though bluntly when he said, “ Those girls are a puny-looking lot.” The characterization was true of that class; is it true of the average high-school girl? Consider the question for your- self as you see in June the graduates of your local high school. And those before you are the fittest who have survived; they are very few in number compared with those who have dropped by the way. Ten years ago I read an unforgettable paper written by a high- school senior. She was a brilliant student who, maintaining the highest rank in her class, had done the preparation for Radcliffe, but had given up any hope of a college course because she was completely broken in health. Her essay was a scathing arraignment of our public-school course ; I have been trying ever since to determine how far it was just. Discussion of the health of the students in women’s colleges is always a popular subject ; has due attention been given to the physical condition of the young girls in the public schools? The public schools are of course immeasurably more important than the colleges. From the beginning of our national life great sacrifices have been made for the maintenance of our schools, sacrifices are still being made. They are expensive in money; in most of our towns no other appropriation is so large as that for education. They are also costly in the men and women that they use up, the teachers that they suck dry of health and strength and throw aside. The teachers seem to think that the work is worth their sacrifice; the tax-payers give ungrudgingly for their children. But if the physical vigor of the children or of a part of the children is one of the expenses of the public-school system, then popular education is costing too much. 236 POPULAR SCIENCE MONTHLY The school system is a manufacturing plant and as such its effi- ciency is properly judged by its output—that is, its graduates. These are subject to physical examination as properly as to mental examina- tion. ‘The boys in the last years of the high school seem encouragingly robust. They usually take a little lower rank in their classes than do the girls, but, as they would themselves express it, they do their work “well enough’ and when their lessons are done they have supplies of unexpended energy. In athletics they show considerable endurance and many boys partly support themselves by working in shops and offices outside of school hours. In their own homes they prove active, hungry and without excess of nerves. The condition of the average girl is manifestly different. She appears to the casual observer anemic, flat-chested, round-shouldered and out of symmetry, and a member of her family knows that she is fickle of appetite, regularly subject to headaches, nervous and irri- table. Some of the girls are frivolous, devoted to ‘society’ and to trashy novels; the average is conscientious about her work and almost morbidly painstaking. She worries over every lesson until it is pre- pared as well as she can do it, probably after that because it is not done as well as some one else could do it. Her study—and her worry— exhaust her and any other work is a burden. At best she needs complete rest after graduation; at worst she joins, perhaps for life, the ranks of the women who are not strong. A large number of pupils leave the high-school before completing their course. More boys than girls drop out, it is true, but the boys go to earn a living or because they have not met the requirements of the school. The girl very often goes by her physician’s advice. If we consult a doctor for an ailing high-school girl he makes a diagnosis and a prescription almost at sight—“ over-study ; take her out of school.” Often he does not find it necessary to inquire about any other habits of hers except her habit of study. But is her going to school the chief factor in the girl’s breaking down? If so, things were better managed in the days of our grandmothers when no girl had much public schooling after she was fourteen years old. If a girl breaks down under a course of study on which a boy thrives does it indicate that she has less mental power? We dislike to admit it and the experience of our teachers does not in general indi- cate it. Why should we attribute the widely different result to the one thing that is exactly alike for both sexes? Brother and sister come into the world with the same mental and physical heritage. The girl in- herits tendencies of body and mind from her father quite as much as from her mother. The boy and the girl have the same food and the same course of study. At the high-school age the development of heart and lung and brain is at about the same stage in both sexes; the girl is a little nearer to her adult weight and height. What circumstances THE HEALTH OF AMERICAN GIRLS 237 of their lives have been different for them? When do they begin to show differences in themselves? From a very early age there have been certain differences—in clothes, in occupation and in recreation, but these have manifestly been superficial and insufficient to account for the contrast. Very little difference appears between the sexes until they are nearly through the grammar school. Then a great change comes to the girl. “ My daughter has become a woman” is the phrase which our grandmothers used to describe the epoch; and far as the callow, fourteen-year-old maiden seems from womanhood, the term is the exact expression of a vital truth. It is at this very beginning of woman-life that especial attention is needed. We know that the boy who is overworked before he gets his growth is always an undersized man; just as surely a girl who is over- worked physically or mentally during her period of puberty is always an undeveloped woman. And mental overwork is fully as injurious as physical overwork. To speak plainly, the maturing girl must have blood and vitality to perfect the organs essential to her complete being and to establish regularly the periodic function characteristic of her sex. She must do these things at the time appointed. If she must choose between developing mind or body let her by all means choose nourishment for her physical growth. The mental expansion can come later, but the physical perfecting has no second chance. If there is lack of develop- ment or unbalanced development at this time she is pretty sure to endure suffering for the best part of her life. From careful investigation of the physical condition of a large number of girls it has been found that from “65 to 70 per cent. enter the higher institutions of learn- ing and business with menstrual suffering of some sort.” In some occu- pations the rate of suffering is as high as 91 per cent. And the girl may be called upon to bear other sorrows harder than pain for a woman to endure. The injury from arrested development may not appear at once, though flat chest and narrow hips may suggest it; but when life demands of the woman that she do a woman’s work she is unequal to it and is broken down in her attempt. Dame Nature, herself the representative mother, has her own idea of the function of women in the scheme of things. When they are fulfilling her purposes she gives them marvelous protection, but woe to those who try to stand against her! Just as soon, then, as signs of change appear in the girl she should have especial care. To quote from Dr. Engelmann, “She should have personal talk and explanation from a woman who has learned the mean- ing of wifehood and maternity.” To supplement from President Hall, “The quality of motherhood has nowhere a more crucial test than in meeting the needs of this epoch.” In general the girl should have at this time no mental or nervous strain to divert nourishment from her 238 POPULAR SCIENCE MONTHLY physical development. At best, if she is strong, does her work without worry and “ normalizes her lunar month” promptly, she may stay in school without much danger provided she take her two days of rest periodically. JI am inclined to believe that this is in all cases worth while until the end of the high-school course, although it is always impracticable to make general rules. A number of women who consider themselves perfectly well so far as sex weakness is concerned have told me that they believe their health due to their year of complete rest at puberty and that they did not find the need of monthly rest after the first years. I am coming to be convinced, somewhat against my wish, that there are many cases when the girl ought to be taken out of school entirely for some months or for a year at the period of puberty. This course is supremely worth while if she shows irregularity of function or decreasing vitality, and it is at this time that there is profit in such an especial vacation. I do not speak with ill-considered lightness of taking the girl out of school for a year. It is a serious matter to her at a time when she is likely to take all her life too seriously and when she should feel as free as possible from annoyance. She is naturally disturbed at leaving her class, especially if she is likely thereby to lose a grade. It is worth while to take considerable pains to minimize her distress. If she enjoys a pleasant visit out of town until the term is well under way, then returns to private lessons with her mother or some other wise teacher, lessons determined in time and length by her physical con- dition, she may endure her enforced vacation from public school without much fretting. The anxieties of this period ought to be borne for her as far as possible; that she should become anxious about her own health would defeat the very end in view. She can be assured that days out of school now are pretty sure to remove the necessity of days or weeks or months out of school later in her course. Similarly two days out of school every month the first year that she is in the high school in order that she may not suffer are really much better worth while than two days out of school the last of the course because she is not able to be present. These days of rest are not in the least incompatible with good work in school; a girl so cared for may be expected to accom- plish more in a year than she who has no such restraint. Mothers protest again and again that such a custom is entirely incompatible with modern school demands, but I have never known a teacher to say that it was not quite practicable, and I have seen school work done under this régime to the entire satisfaction of all concerned. It is perhaps worth while to record here the questions of one grammar-school teacher —“ Why will not mothers tell me when the critical period begins for their daughters? Many times I can determine for myself, but in general I could make things so much easier for the girls if I could only know when they need especial indulgence.” THE HEALTH OF AMERICAN GIRLS 239 No, the objection to periodical rest does not come from the teacher nor primarily from the mother, but from the girl herself. Yet if our thoughtful mothers could be convinced that “ the health of a girl for her whole life depends upon her normalizing the lunar month,” to employ a phrase of President Hall’s that I have quoted before, they would bring about the best order of things. But most mothers honestly believe that no great care is necessary. They expect their daughters to get along about as well as they did and they suppose that about so much pain is necessary for women. Mothers could hardly escape being con- vinced of the great responsibility that is upon them at this time if all the evidence that exists on the subject could be brought to their at- tention. It is undoubtedly true that each month in a woman’s life is a con- tinuous wave with a regularly recurring succession of phases and this continuity of change makes an ingenious argument that a woman does not need especial rest at any particular time of the month. But my own observation would have convinced me that it is supremely worth while to guard an adolescent girl from nervous strain during the days when the wave of her vitality is at its lowest point even if physicians and educators had not spoken so strongly in favor of the custom. Dr. Mary Putnam Jacobi, in the monograph which she wrote to show that there is nothing in the physical nature of the adult woman to incapacitate her periodically for work, says nevertheless, “In adoles- cence and during the first years that the reproductive wave of nutrition is being formed mental work exacted in excess of the capacity of the individual may seriously derange the nutrition”; and elsewhere in the same paper she says, “It is curious to note how the effects of misery and the effects of luxury during the childhood of a girl are found so often to result in an identical mode of stunting during adolescence.” Much that has been written on the subject of puberty in girls has been printed only in medical and educational journals. Perhaps some women of delicacy may say that the discussion of such a matter is properly confined to medical journals. To a certain extent this is un- doubtedly true; the trouble is that the average mother does not have easy access to those files. Therefore it seems worth while to quote at some length in this paper. The idea that a girl needs especial care at her time of maturing is not a new fad of educators. In the time of Hippocrates it was noted that the period of puberty was very critical for the development of the nervous system. The rites enjoined by Moses provided for the care of the girl at this crisis and a similar provision appears in the code of Zoroaster. Savage nations to-day prescribe and protect by their super- stitions definite observances for the woman at every period of her sex- life from the beginning to the end. ‘The women of the North Amer- ican Indians, always regarded chiefly in reference to their utility, 240 POPULAR SCIENCE MONTHLY nevertheless have assured to them by custom from three to five days every month so long as the monthly law rules them. With the present increased attention to the study of preventive medicine, students of gynecology have come to believe that the diseases of women are in good part due to their “ignorance of functional hygiene.” In 1901 Doctor Engelmann gave as his president’s address at the annual meeting of the American Gynecological Society a paper, “The American Girl of To-day,” which entirely covers this subject from the physician’s point of view. In brief his opinion as there expressed is: “Adolescence is the most important period of a woman’s life, the period during which the foundations of future health are laid. It is in this period of school, the beginning of social life, the period of learn- ing in trades that the nervous energies of the female are most fully engaged and her activity is concentrated on the brain to the detriment of other functions, above all the developing sexual function, the central and most important and at that time the most easily disturbed.” Dr. Wylie has expressed his opinion that “the American horse re- ceives on the average better treatment than the young women of America from the time of early girlhood until the age of development is passed.” President Clark and Professor Tyler have studied systems of educa- tion with especial reference to the physical development of children. In his book ‘ Adolescence,’ President Hall devotes a long chapter to the subject of ‘ Periodicity.’ He is himself convinced that the health of a woman for her whole life is determined in her days of adolescence, and he cites so many witnesses, ancient and modern, learned and savage, that the most unbelieving reader can but be convinced while she reads. Professor Tyler, as a student of biology and education, has consid- ered what bearing the laws of growth have upon the proper arrange- ment of courses of study. In his lectures on ‘The Physical Basis of Education’ given last winter in Boston before the Twentieth Century Club he said, concerning the development of girls during their school years, “ At the critical period of puberty almost every organ in the girl’s body is affected. [The girl’s] pubertal period is much more likely to be stormy than the boy’s and her rate of morbidity is consid- erably higher. Her future health and happiness, if not her life, de- pend upon the successful completion of the metamorphosis.” A valuable addition to our knowledge of schoolgirls has been made by Dr. Helen Kennedy. She collected statistics of the habits and the health of girls from a large city high school; her article includes her questions and the answers of the students, so that we may draw our own conclusions. We note that while nearly all the girls report them- selves as growing no worse during their high-school course, 97 out of the 125 say that they suffer to a greater or less degree. All Dr. Ken- THE HEALTH OF AMERICAN GIRLS 241 nedy’s results are interesting and full of suggestion, and much light upon the health of our women would come from further investigations along these lines. From her data and that of others, it is to be noted that most girls between sixteen and twenty suffer more or less; and that alike for students and working girls the percentage of sufferers increases during that time. My belief that most girls have the foundation of their suffering laid before they are sixteen may be unwarranted, but I have found no data that contradict it. Quoting again from Professor Tyler, “The critical period in a girls life is evidently the years between ten and fifteen, earlier than most of us think. Most of our care and thought is devoted to locking the barn door after the horse has been stolen.” And once more, in the phrase of Dr. Engelmann, “the younger the girl, the nearer the period of puberty, the more impressionable the system, the more susceptible to influence for good or evil and most harm is wrought in the first year of functional life.” I quote much from Dr. Engelmann, but where can I find better authority, especially in this particular phase of gynecology ? I have given a large part of my discussion of the health of our girls to a consideration of the demands of sex at adolescence, but perhaps this extent in treatment is not disproportionate to its importance in their lives. When a girl is safely guided “through the breakers of puberty ” we have some reason to expect for her life-long vigor and the power to do. But she needs also through the rest of her school days intelligent direction in other respects. It sometimes seems to the teacher that she does not get quite as much as she needs. The teacher is expected to see all that goes on in the schoolroom;, in addition to this she does see evidences of a great many things that go on outside the schoolroom, things which, though they largely affect the results of her work, she has little power to modify. The personal > habits of a girl determine to a great extent what she is able to gain from her course of study. If it is important that her nourishment be directed at all times to the most immediate needs of her body, surely it is no less important that there should be sufficient nourishment to satisfy these needs. Every girl knows that this sufficiency of nourishment is impossible unless she assimilates plenty of food, but she does not always make her knowledge evident in her habits. Very often the high-school teacher is asked to excuse from the session, on account of headache, some girl who admits when questioned that she has eaten no breakfast that morning. It is possible for the teacher to point out to the girl the folly of starting a locomotive for a day’s run without providing fuel, but the girl must have some pressure brought to bear upon her at home if she is to take sufficient time for her meals. Insufficient breakfast is VOL. LXxI.—16. 242 POPULAR SCIENCE MONTHLY often due to late rising; if the girl has not time enough to dress and to eat, it is not the dressing that is hurried. With the usual five-hour high-school session the girl needs at recess a proper luncheon. If the school has a lunch counter where only suit- able food is provided, then it is well, but in case the luncheon comes from home the teacher often wonders whether the mothers are accessory to the mince and lemon pies and the fruit cakes that make the daughters unfit for study. At the end of the long session the girl comes home with little appetite or power of digestion. In a working-man’s family dinner was served more than an hour before, and the plateful of food that has been kept warm for the daughter is hardly palatable; prob- ably she makes her meal chiefly out of the dessert. It is tremendously worth while for the mother to preside personally at this meal of her daughter and always to have tempting, nourishing and easily digestible food ready for her when she comes home from school. The blame for a high-school girl’s dyspepsia is often attributed to the one-session system; and under that system a bad order of things is easy, aS we have seen. On the other hand, with one session very much better conditions are possible than with two if the best use is made of the time out of school. It ought to be possible for the greater part of the pupils to work under better conditions at home than in most schoolrooms; and when they are in school until four there is little time for being out of doors in the sunlight during most of the school year. The girl who is insufficiently nourished craves abnormal things and eats sweets and sours in unsuitable proportions. With all these sins against her digestion much of her food is not assimilated. Very often the waste is not properly eliminated; the girl does not realize that this condition is a menace to her health and so her whole system is poisoned. Constipation is a disease and the cause of many others; it is entirely incompatible with perfect health or good work in school. At least one strong article has been written—by a physician—to maintain that women’s mode of dress is a sufficient cause of all their physical distress. Undoubtedly it has been responsible for great injury, though present conditions are much improved, so far as tight or long clothing is concerned. We appreciate, however, that women are still handicapped when we see how their ordinary clothing hampers them in gymnastic work. Just at present school girls expose themselves to the cold in a way unsuitable to this climate. Even in winter they go to school bareheaded, in lingerie waists with light undergarments, cot- ton hose and low shoes. The toughening process is valuable to a cer- tain extent, but such exposure as this means an expensive strain upon vitality. School girls are notably careless of wet clothing and wet feet. Mothers have difficulty in persuading them to overshoes and rain-coats, and teachers find them unwilling to go home when skirts and stockings THE HEALTH OF AMERICAN GIRLS 243 are wet through. To sit in wet clothing is dangerous even for an adult woman. This paper is intended to deal especially with those elements of a girl’s life that are detrimental to her health, yet are usually overlooked. It is hardly necessary to include much discussion of the need of sleep. Every one understands that a girl needs about nine hours of sleep in pure air. At present there is a general enthusiasm among young people for outdoor air. If they do not take sufficient sleep it is not because they do not know the need of it. The recreation of a girl ought to do something toward her re- creation, not leave her more exhausted than all her work. But those who have studied the physical development of the girl tell us that the excitement and nervous strain of society and late hours are much more exhausting than hard study for a young girl. This does not mean that she should give all her time to her lessons, only that her amusement be something less wearing than study. She ought to have good times, she is the better for parties if they are limited to reasonable hours and to suitable companions. One element of a high-school girl’s life which is seldom mentioned, but is often noted by her teacher, is the detriment that comes to her from social intercourse with those who are a few years older than she, especially with older men. Ifa girl spends one or two evenings a week in the cultivation of such friendships as these and reads a romantic novel every week it is to slight profit that she spends the rest of her time “over her books.” It is pretty nearly impossible for her to concentrate her mind on her work. It is a very common criticism that there is too much social life in the school itself. It is admitted, at least in this country, that children need some amusements. Jf other social distractions could be omitted what could give a school girl more harmless pleasure than the class dances and parties, under the direction of a teacher-chaperone, parties that include only people of her own age and experience and that close at a proper hour? A girl’s real re-creation is her out-of-door sports and she should receive every encouragement to those that she most enjoys. The imple- ments of such sports—golf-sticks, tennis racquets, boats and skates— are better investments for parents’ money than even pretty clothes, if there must be a choice of expenditures. Housework is one of the best possible forms of exercise if done in well-ventilated rooms; it might be profitably taught by mothers under the name of physical culture. Music study is, I believe, hardly to be classed as a recreation, even though it happens that the pupil enjoys it so much that it does not appear a burden. It is mental work requiring close attention, memory and some eye strain. It makes about the same demands as an extra course in school, and if it seems best for the girl to continue much piano-prictise during the term, she should take five years for her high- 244 POPULAR SCIENCE MONTHLY school course. {ften a collapse in school that seems inexplicable to the teachers is due to a pupil’s adding an hour or two a day of piano- practise to an already full school course. It is worth while for the girl to take music lessons during the summer if she is within reach of piano and teacher ; the discipline and regularity are a good thing during these weeks of complete freedom. Many pupils suffer from eye-strain; every possible care should be taken at home to minimize this, both for the sake of the eyes and for the direct influence upon the mind and temperament. Study before breakfast is very likely to aggravate eye-strain; if there must be early study the pupil should bathe her eyes in cool water and take some food, that the congestion of the eyes may be relieved. A proper light lessens the fatigue of the eyes. By day the student should not face the window and at night her lamp should have an opaque shade. Often the change from a white to a dark-green shade relieves long-continued pain in the eyes. Reference has been made to a girl’s spending time “ over her books,” and the phrase is sometimes especially accurate. Instructors of college freshmen complain that boys and girls go through preparatory school without having learned how to study. The teachers may be responsible for a part of this, but there are some conditions that the most devoted teacher can not govern. She can regulate a pupil’s work in school, but when much of the study must be done at home the home must help in establishing good habits of work. A student needs a well-lighted work- room reasonably free from interruption. It is not necessary that the window have an extended outlook; a girl is likely to establish herself for her afternoon’s study where she can get a wide view of the street. With a little attention the daughter of the house may be helped by her surroundings at home to a concentration upon the work at hand that will lessen marvelously the hours that she must spend with her books and give her more time for recreation. Elements internal and external, elements physical and mental, have been treated together in this discussion and inevitably so, for they are almost indistinguishably interwoven in the life of the girl. How much her health of body depends upon her health of mind no one can venture to say. One feminine characteristic becomes especially evident in the adolescent maiden which has considerable influence upon her health. This is the narrowness of mind that causes her to give undue impor- tance to really minor elements of her life. She comes to believe that there are only two or three things in the world that are really impor- tant; if she is an only child she may decide that there is only one. It is undoubtedly desirable that a girl stand well in her class and wear attractive gowns, but there are other things just as essential. When she sees that it is worth while to hold fast to “a taste for simple pleas- ures ” and to promote the happiness of her family and community, and THE HHALTH OF AMERICAN GIRLS 245 supremely worth while to make herself an able woman physically, she is well on the way to the attainment of a poise of mind essential to her health and to her breadth of thought. Much of her narrowness may be eliminated by the public school and that very effective education which a child’s companions supply. But there are certain chambers of a maiden’s mind especially suitable for her mother’s furnishing; in the most intimate relations of a girl’s life she must naturally find her direction at home. And is not this the conclusion of the whole matter? Undoubtedly the girl does need “the complementary wisdom of school and home,” and sometimes when every precaution is taken at home the school work may be too hard for the girl at some particular time. In this case the parents must lay the matter before the teachers; in some way the work must be lessened, so that a growing girl does not come through each week exhausted. But in most cases it is found that it is not the work that exhausts. The American girl needs the public school. She needs it for its democratic influence, really a powerful element in the mutual under- standing between women, which alone can solve the “ servant problem ” ; she needs the acquaintance with boys of her own age which banishes sentimentality; she needs the broadening influence of men-teachers. Tt does not seem on the whole that there are many points in which the school can do more for the girl than it is doing; it is not in general conditions that she needs more consideration. For it is true that “ the teacher has to deal with the average; the parent must accommodate the particular,” and that “it is to the parent that the child must look for his (and her) individual protection and care.” In brief, as soon as a girl comes to manifest her difference of sex, she needs especial and intelligent protection at home to free her from strain mental and physical. And when her health and future fulness of life are thus established, they must be guarded by continued oversight of her food and clothing and exercise and recreation and sleep. Her mental and nervous strength must be conserved by guiding her into orderly ways of thought in the personal and intimate matters that obvi- ously do not belong to the public school. When these elements of her life are properly administered at home the American girl can in or- dinary cases complete the course of study in the public schools without injury to her health. The articles to which especial reference has been made are: “Rest during Menstruation”: Dr. Mary Putnam Jacobi. “The American Girl of To-day ”: Dr. George J. Engelmann. Article in New York World: Dr. W. Gill Wylie. “ Adolescence”: President G. Stanley Hall. “ Effect of High-school Work on Girls during Adolescence”: Dr. Helen Kennedy. 246 POPULAR SCIENCE MONTHLY SOME ETHICAL ASPECTS OF MENTAL ECONOMY By PROFESSOR FREDERICK E. BOLTON STATE UNIVERSITY OF IOWA aA be economical of one’s powers makes for efficiency ; to be prodigal, makes for inefficiency. To be efficient in life is the highest ethics. To be inefficient because of prodigality is to be immoral. It will be observed that in this discussion I follow the Aristotelian conception of ethics as a practical science, rather than as a theoretical science. The object of the discussion is to consider certain modes of mental life, to evaluate them, and to offer a few guiding suggestions for the proper conduct of life. Professor Paulsen has compared this view of ethics with the science of medicine, which he says, “instructs us to solve the problems of corporeal life, to the end that the body may perform all its functions in a healthy manner during its natural existence; while ethics, basing itself on the knowledge of human nature in general, especially of its spiritual and social side, aims to solve all the problems of life so that it may reach its fullest, most beautiful and most perfect development. We might, therefore,” he concludes, “ call ethics universal dietetics, to which medicine, and all the other technologies, like pedagogy, politics, etc., are related as special parts, or as auxiliary sciences.” (“ A System of Ethics,” p. 2.) The purpose of ethics, then, is “to determine the end of life, or the highest good, and to point out the way or the means of realizing it.” This much by way of definition is given preliminary to my discus- sion of mental economy as a phase of ethics, in order to justify my treatment when I seem to digress from the immediate consideration of right and wrong and to discuss questions which might properly be also catalogued under pedagogy or mental hygiene. All will agree that no life is most nobly lived unless it has secured the complete unfoldment of the richest inheritances bequeathed by ancestry ; unless it has appropriated environment in such a way as to secure the limits of individual advancement; unless it has rendered the utmost possible service to society. To fail in these particulars is to be prodigal and uneconomical. ‘To be uneconomical is to be un- ethical. The world is full of work to be done, problems to be solved, which are of proportions never before assumed. 'To meet these duties and responsibilities requires the highest products of intellectual eyolu- tion, keen and broad sympathies, and vigorous, sustained will-impulses. To live completely and ethically, every one should accomplish more ETHICAL ASPECTS OF MENTAL ECONOMY 247 than his parents. This means not only that he should secure more tangible results, but that he should develop and expend more force than his ancestors. Each one stands on the shoulders of the past and may utilize all the accumulations of the past. In order to accomplish more than our forefathers, it is absolutely necessary, however, to husband our forces. But with the increase of potentialities, we must also reckon with the fact of the manifold additional ways inviting and exciting to depletion of powers. As an illustration, let us note the excessive stimu- lation to which the eye is subjected. In our present civilization we have come to depend more and more upon vision. The strain upon the eye in gaining knowledge of the objective realities about us has been increased a thousandfold by modern modes of travel. In addition, we must use the eye to interpret language symbols about myriads of things inaccessible to personal inspection. Primitive man had only a narrow range of things to see, and those usually at some distance. Hence he knew not of eye strain resulting from the microscopic scrutiny of a vast kaleidoscopic scene. Formerly man could deliberate in seeing the few things within his range. But now he becomes a globe-trotter, com- pacting into a few weeks the view of scores of nations, vast expanses of country, the collections of ages, and the unceasing activities of the heterogeneous throng. In a week’s jaunt and doing a world’s fair, present-day man sees more and hears more, than was possible in a whole lifetime, a century ago. Besides these activities the eye is made to do duty in reading the twenty-four-page daily, the forty-eight-page Sunday edition, in scan- ning a half-dozen weeklies, going through a cartload of magazines, to say nothing of all the latest books which one is supposed to read. The ear is equally assailed with the ceaseless hum of voices, door bells, telephone calls, whir of the trolley, the shriek and clang of the locomotive, the maddening grind of the sleeping car or the twin-screw steamer (upon which we take our vacation rest!), the deafening roar of the factory, the clatter of galloping hoofs and rattle of wheels over paved streets. Even at night we must be assailed, business must not stand still, goods must be sent by return mail, limited trains must outdo lightning specials. Even on Sundays we are not permitted to listen to restful sermons—they must be such as to give rise to glaring head-lines, and the music is often of ear-splitting pitch. The first and foremost great law of mental dietetics that should be impressed early and often is that one long ago stated by Juvenal, viz, mens sana in corpore sano. Every parent and every teacher should understand that the first business of the child is to become a good animal; childhood years should be largely vegetative. His primal in- heritance is physical. To have big lungs, firm muscles, elastic step, ruddy cheeks and scintillating, unspectacled eyes, and every sense alert, at the close of youth are priceless possessions with which a knowledge 248 POPULAR SCIENCE MONTHLY of algebraic formule and a few dates in history are not to be com- pared. For what shall it profit a man if he gain the whole world of knowledge and have not physical power to use it? Not only is a sound body an absolutely necessary correlate of a sound mind, but mental processes themselves are incomplete without muscular accompaniments. How vague would be our ideas of walk- ing, talking, writing, painting, molding and chiseling without the muscular accompaniments. You can not even think hard of a word without involuntarily moving the muscles. Try it sometime by open- ing the mouth and thinking the word bobbin, bubble, ete. So-called ‘mind reading,’ table turning, the planchette, all illustrate the same fact. Again, the body possesses all the gateways to the soul through which all knowledge of the outside world must come. Close the eyes, stop the ears, and deaden all the other sense-organs and the child is mindless—an idiot. Finally, no message can issue from the mind, nothing of its workings can be revealed and no control of the world forces be secured, save through the medium of physical organs—the muscles. Consequently, to secure the highest mental efficiency we must give due consideration to bodily culture. Any education which disregards this is a failure. Every student should have sufficient food, adequate sleep, proper exercise, abundant recreation and in every way seek to promote bodily vigor. The Socratic doctrine of innate ideas has been responsible for many pedagogical sins. Socrates taught that the business of teaching was to draw out these inborn ideas. The middle-age ascetics went so far as to assert that spiritual development could be best furthered by bodily torture. Consequently, in order to elevate the mind they strove to devise tortures to crucify the flesh. We read of their fasting, eating inappropriate foods, going barefooted and otherwise scantily clad in the dead of winter, wearing hair shirts with the hair inside; bathing in ice-cold springs in winter, sitting on sharp nails, assuming unnatural and extremely uncomfortable postures for months at a time, binding the body with ligatures, loading the body with weights, living in filth, going without sleep and working all day and all night, ete. Simeon Stylites is said to have lived for forty years chained on the top of a high pillar and Macarius slept for months in a marsh, exposing his naked body to the stings of venomous flies, in the misguided notion that the greater the bodily penance the more exalted the spirit be- came. In fact they tried to devise every possible means of excruciating torture of body in the attempt to exalt mind. To this pernicious doc- trine of the relation between body and mind can be traced much of the long intellectual night of the middle ages. To it are directly traceable the beliefs in witchcraft, demonophobia, sorcery and the ETHICAL ASPECTS OF MENTAL ECONOMY 249 superstition that insane people were possessed of evil spirits. Pro- fessor Monroe (“ History of Education,” p. 248) says, “the virtue of the monk was often measured by his ingenuity in devising new and fantastic methods of mortifying the flesh—all these forms of dis- cipline were for the sake of spiritual growth, the moral betterment of the penitent: all these, as the very significance of the word asceticism indicates, reveal the dominant conception of education which prevailed throughout this long period,—the idea of discipline of the physical nature for the sake of growth in moral and spiritual power.” So long as the body was considered gross and evil and a mean tenement of clay from which the spirit should strive as soon as possible to escape, it was but natural that bodily care, and much less culture, should be considered unworthy objects of education. Sleep as a factor in student life does not receive adequate considera- tion from many students. The student who does not take regular and sufficient sleep is pilfering his own bank account. There is absolutely no substitute for it, and when once lost, restitution can not be made even by a nap in the class-room. Nervous tissues exhausted by a day’s activities can only be restored by sleep. Dr. Hall says that no child should be allowed to go to school without having had nine hours of sleep and a good breakfast. This would not be a bad rule to guide student life. Parties, athletic jaunts, examination crams, and even working for one’s living, which cause students to remain awake beyond the midnight hour, transgress all laws of mental and physical hygiene. There is doubtless no cause so frequently producing nervous breakdown as loss of sleep. Several former students who were pale and anemic while here have returned after a hard year’s teaching experience with ruddy complexion, increased weight and all the appearances of vigor- ous health. I have inquired concerning the change and have been answered, “I guess it is because I get enough sleep now.” The student who goes to college to become a hermit, not touching elbows with his college mates and developing no interests through hearing music, attending lectures on varied subjects, seeing nothing of the great busy world about him, misses a vital factor of college life. His procedure is uneconomical and therefore unethical, for when he emerges from the college halls into the busy, bustling world, he will find himself behind the procession. Because he has not seen the larger world while acquiring his book knowledge, he perceives no relation and often feels that the world is somehow out of joint because it does not conform to his bookish ways. To become efficient he must begin again and study the world about him. He must gain its view-point, adjust himself to it; he must now try to gain friendships which should have been established in college. All this is a wasteful, selfish process. On the other hand, some students need to be cautioned when they make the opposite and equally grave error of saying that “ My asso- 250 POPULAR SCIENCE MONTHLY ciates teach me more than my books and class work.” Possibly they do, but it is not the fault of the books nor of the classes, nor any compli- ment to*the associates. He says, “I study men, not books.” This is sound, if rightly interpreted, but he should know that there are some men besides freshmen well worth knowing. Some of them can only be known by going to their books. He should learn to study indi- viduals as well as masses, the world’s teachers as well as his own classmates; he should look up as well as around. The college course is certainly a failure if it has not given the student lasting acquaint- anceships with a few superior students, some great men on its faculties, and many of the world’s intellectual élite, who can only be known through the pages of history and the great literatures of all ages. Great ideals which become guiding stars of one’s destiny should be clearly glimpsed. The great laws of science should have banished superstition forever from his mind and given him a new interpretation of universal development and history. Finally a clear conception of philosophical principles should act as a great balance wheel enabling him to interpret life and all its manifold activities. It is through books and master minds that the student should get meaning for all his varied observations and activities. To regard books and class work as inferior and something to be endured is to miss the whole point of a college education. Colleges are founded and maintained for the specific purpose of furnishing books and teachers, and all class work, once selected, should have the right of way. Student programs should not be so overloaded but that all the accessories may be duly em- phasized. Recreation as well as work should become a part of one’s religion. The gospel of relaxation needs evangelists as well as the gospel of work. It is important for the student to understand early the force and value of habit. Much time is lost by every one of us because our early training did not render automatic all those activities that we have to perform constantly and in the same way. Purely mechanical work can be controlled more economically by lower nervous centers than by higher. In childhood and youth the nervous system is plastic, a prime condition for memorizing and fixing habits. Among the habits that should become ingrained during this period are those of correct bodily postures and activities, correct speech, the multiplication table, spelling, writing, those involved in learning to speak foreign lan- guages, etc. Most habits are controlled by the spinal cord, which is early developed. Hence we should form habits early, so that the brain may be relieved later of mechanical work and be concerned with higher operations. As Dr. Balliet has observed, “ At first a child uses his brain in walking, later he can walk from habit and walks therefore with his spinal cord. As first we spell with painful con- sciousness, later we spell familiar words of our vocabulary with little ETHICAL ASPECTS OF MENTAL ECONOMY 251 or no consciousness. Children ought to be trained to write and spell mainly with the spinal cord, and use all their brain power in thinking the thoughts to be expressed. We do many things with the spinal cord to relieve the brain. We walk with the spinal cord, we write and spell with the cord; I suppose we knit and gossip with the spinal cord ; indeed we may sing and pray, not with our hearts, nor with our brains, but with the upper part of our spinal cords. We tip our hats to each other, not with our brains, but mainly with our spinal cords; when we meet people whom we do not wish to see, we often shake hands _ mechanically with our spinal cords—hence we speak of a ‘ cordial welcome.’ ” Not only do these elementary physical activities become automatic, but also processes of judging and reasoning must become largely mechanical before becoming serviceable. One’s thinking is largely specialized and judgment outside of the well-beaten track of thinking is not very valuable. The lawyer’s opinion concerning disease is slowly formed and unreliable; the doctor’s judgment about legal matters likewise is valueless. The expert in a given line is one who has studied widely and who can form instantaneous judgments because of the habitual consideration of the data. Difficult studies pursued through a long time until mastery is complete become as simple as the alphabet. Mathematicians become so familiar with the calculus that they read it for recreation when fatigued with other work. The lawyer can instantly cite scores of cases and precedents for which the tyro would have required hours to summon to the foreground of consciousness. Hence, when knowledge is to become usable it must be pondered long and every detail absolutely appropriated. To arrange work in such a way as to sustain interest through variety and at the same time dwell upon it until thoroughly comprehended and appropriated is high teaching art. The demands for variety frequently allure to new fields before assimilation has been effected. Even the will is much more a matter of habit than we usually think. It is too often regarded as a sort of psychological ghost which pursues us about, compelling us to do certain things and prohibiting us from doing certain other things. Every one is supposed by the popular mind to have at birth a will of unchangeable quality and quantity. This is absolutely incorrect. The child has impulses but is practically will- less. His will must grow and develop like any other powers. We use the will when we perform actions which we control. When we lack control, either muscular or mental, we lack will, or possess a diseased will. When a child can pick up a pin, thread a needle, tie a knot, walk without tottering, run, talk plainly, etc., he manifests definite mental and muscular control and therefore manifests voluntary power. Now these activities were only possible after long practise and the development of definite habits of activity. As Dr. Royce says, “ Our 252 POPULAR SCIENCE MONTHLY minds become full of impulses, of tendencies to action, of passions, and of concerns for what we take to be our welfare. All these im- pulses or concerns get woven by the laws of habit into systems of ruling motives which express themselves in our regular fashions of conduct. The whole of our inner life viewed in this aspect appears as the pur- posive side of our consciousness, or as the will, in the wider sense.” We even need to put new interpretation upon the meaning of the freedom of will. Freedom means power of choice, power of desire, but not necessarily power of execution. The life-long habits of every individual chain him down to certain types of action and it often takes long practise to break up fixed customs and habits of activities. This has its sad side and also its advantageous side. Were it not that we willed with all previous acts of willing, and were it not true that all our habits hold us to certain types of action, it would be impossible to predict what the individual might do on a given occasion. When we analyze the meaning of character, we find that it implies nothing more or less than the accumulated tendencies toward action in par- ticular directions. The man who has habitually acted in a righteous direction has built up tendencies toward righteousness. On the other hand, one who has sown a generous supply of wild oats in youth is sure to reap in old age an abundant harvest of viciousness. It could not be otherwise. We are enjoined in the Scriptures that ‘ whatsoever a man soweth, that shall he also reap.’ A prose-poet has stated that “we sow a thought and reap an act; we sow an act and reap a habit; sow a habit and reap a character; sow a character and reap a destiny.” Professor Fullerton says that the old interpretation of absolute freedom would make this a melancholy world. In such a world of freedom no man could count upon himself and no man could persuade his neighbor. We should be powerless to lead one another into evil, but we should be also powerless to influence one another for good. It would be a law- less world with each man cut off from the great whole and given a lawless little world all to himself. He said, “To-morrow I am to face nearly one hundred students in logic. It is a new class. I know little about its members, save that they are students. I have assumed that they will act as students usually do and that I shall escape with my life. If they are endowed with free will in the old interpretation, what might I expect? What does free will care for the terror of the dean’s office, the long green table, and the committee of discipline? Is it disinterested in logic and does it have a personal respect for me? The picture is a harrowing one and I drop the curtain upon it.” Hence, from a pedagogical point of view, how important to fortify the child by habits against that which is undesirable in conduct by developing in him impulses and tendencies through experience in right conduct. Right conduct in children there must be if we expect right conduct in adult years. The man who has to reflect to keep his hands ETHICAL ASPECTS OF MENTAL ECONOMY 253 from his neighbor’s pocket does not possess honesty of a very high type. It is only the one who possesses no impulse to pick his neigh- bor’s pocket and who does possess an instinct of abhorrence against such an act that is really honest. The one who is tempted evinces disease of will. Independence of thinking is‘a rare but thoroughly economical mode of activity. Many people are so unused to thinking for them- selves that they would be frightened at the appearance in conscious- ness of a thought really their own. It has been said that “animals think not at all and some men a little.” Most of the thinking of the world is carried on by a few individuals. The rest of the world are mere echoists. This is a terribly wasteful process, and sinful. If more people were independent thinkers there would not be a yearly output of millions of barrels of patent medicines, the main ingredients of which are alcoholic preservatives. Soothing syrups with opiates are fed to children because they are said to cry for them. The children are quieted, oftentimes so effectually as to be stupid through life. “ Harmless vegetable remedies ” is a magical phrase. Perhaps this is why so many take extract of hops and barley, spirits of corn, nicotine and opium! Because of lack of independence of thought, superstitions have always hindered the world’s progress. Even to-day the number 13 is so ominous that you can not get a room number 13 at a hotel, can scarcely have 13 at table. Friday is still considered so unlucky that steamship companies hesitate to make sailing dates on Friday. Farmers still plant their potatoes in the moon, and men carry potatoes in their pockets to cure rheumatism. Only a few days ago I saw a man in this city who had a rattlesnake’s tail in his hatband to ward off rheumatism. Clairvoyants and fortune-tellers apparently find plenty of dupes, if we are to judge by the wealth of their advertising. Thus on every hand we find ample evidence that people are sinning and being sinned against simply because of slothfulness in thinking. In ancient times and in the middle ages the scholars shut them- selves away from the world, quiet as it was, in order to avoid the dis- tractions against thinking. While they erred in not recognizing that the senses are the source of all knowledge, were they not wise in recognizing that to think effectively demands solitude? I wonder if there is not much in modern student life that militates against the deepest thinking. With the multiplication of student activities, of themselves in no way secondary to any others in im- portance, have not the opportunities for sequestered contemplation de- creased? With football, baseball, basketball, tennis, rowing, skating, the literary society, the dramatic club, the freshman banquet, the sophomore cotillion, the junior prom, the senior hop, numberless fra- ternity, sorority, and various other house parties, the various church, 254 POPULAR SCIENCE MONTHLY social and other engagements, besides the loafing hour, the theater, con- cert, special lectures galore, the newspapers and magazines to scan, the letters to write home and other places, applications for schools to make, etc., one might well exclaim, “ And when do they find time to study?” Many students take on altogether too many activities. In my own observation I have known several students who arrested their develop- ment badly by getting too many irons in the fire. A student’s popu- larity is not infrequently the cause of his intellectual arrest. By attempting debates, athletics, dramatics, study and society, all at the same time, his energies are dissipated, his growth stunted, while his plodding companion by everlastingly keeping at a few things finally becomes a master and frequently astonishes even himself as well as his acquaintances. Even short courses with too much variety, except for inspiration, are uneconomical, because they do not lay permanent foundations. ‘Too many open lecture courses provided by faculties may easily be distracting and a source of dissipation. The student must learn to say no to the siren’s voice which continually beckons him on to new fields. I sometimes feel that there ought to be some course labeled “ thinking ” in which the individual should be isolated from everybody long enough to really empty his mind of all ideas which are merely echoes, and then to discern what are really his own. With all the dis- traction of congested social life, the time may come when it would be a blessing for the state to imprison a few great men each year and allow them only pen, ink and papér. It may have been a fortunate thing for the world that John Bunyan languished in prison until his thoughts had had time to germinate and come to full fruition. Possibly the blind Milton, shut away from the distractions of visual stimuli, may have looked within and discovered thoughts struggling for expression, but stifled with ephemeral ideas of sense perception. While we are rightly emphasizing group activities as an aid in de- veloping altruism, I wonder whether students do not sometimes misin- terpret its meaning. Self-activity is fundamental in the process of acquisition of knowledge. No knowledge is of much value that is not made one’s own personal possession. This means more than the recital of words and formule gained from books and companions. In their desire to be helpful I sometimes see students in groups, even sitting on the stairways when the crowds are passing, believing they are studying together. When one hears the bits of gossip interspersed between the formule, the declensions and historical dates one wonders where the calm reflection, deep concentration, analysis, comparison, doubt, contemplation, deliberation, complete abstraction, enter in. An oyersocial room-mate who persists in retailing the gossip of the day during the hour set apart for study is an uneconomical acquisition. ETHICAL ASPECTS OF MENTAL ECONOMY 255 Psychology has thoroughly demonstrated that we can consciously attend economically to only one set of ideas at a time. Even much note taking in class is an uneconomical distraction. The faithful but misguided student frequently attempts to take down every word uttered. He deceives himself, for what he hopes to carry under his arm he should have in his head. No wonder that sometimes the less scrupulous one who cuts classes and borrows notes instead of writing them fares about as well. In student life it is important to thoroughly master a task as speedily as possible. To skim over a lesson and leave it without mastery is wasteful. The process may be repeated a dozen times in this way and then be only half learned. Hence, “ whatsoever thou findest to do, do it with all thy mind and with all thy heart and with all thy strength.” In mastering things for keeps two attitudes are neces- sary—interest and attention. Attention is the mother of memory; in- terest is the mother of attention. Hence, if you would secure memory, you must capture the mother and the grandmother. It is the business of us all to be interested in what we do, and it is unethical to regard our work as drudgery. I sometimes say to students, you never will be great successes as teachers until your work has come to occupy all your waking moments and even your hours of sleep. It must be your life. If you wish to know what you are interested in just catch your- selves suddenly occasionally, when you have no prescribed task, to see what you are thinking about. Those great dominating, insistent ideas indicate your real interests. : May I say a word on the ethics of cramming for examinations? The method is a delusion and a snare. Ideas are not grasped, asso- ciations are not made, brain tracks are not made permanent, and even though the student might pass an examination on such possessions, like the notes of an insolvent bank they are found to be worthless trash when put to real use. Instead of wisdom more to be prized than fine gold, such a process may leave one with only bogus certificates. Make your mental acquisitions absolutely your own while going over the subject day by day, take ten hours of sleep before every examination day, and the results need not be feared. In trying to make possessions most permanent and most economically I give frequently the follow- ing recipe: Study your lesson as if you expected to teach it. When you can teach it to some one else you possess it. Frequently actually try to teach your lesson. If your room-mate will not submit, inflict it upon an imaginary pupil. Some one said, “I do not lecture to instruct others, but to clear up my own ideas.” Although young shoulders should not become bowed down by an overweening sense of responsibility, yet it is sinful not to impress the young with the importance of the morning of life. The old adage 256 POPULAR SCIENCE MONTHLY that it is never too late to mend should be replaced by the one that it is ever too late to become what one might have been, if an oppor- tunity has been allowed to slip. Students should early recognize the importance of making the most of the morning of life. Biologists have come to recognize the economic value of the period of infancy. The period of infancy is the period of plasticity, the period when the individual can be molded and modi- fied; in other words, educated. The longer the period of infancy, the higher the degree of educability. The newly-hatched chick has a short period of infancy. On emerging from the egg, it can perform almost all the activities which it will ever be able to perform. It has very little to learn, very little possibility of learning and very little time in which to learn. The young dog has more to learn, a longer period in which to learn it and larger possibilities of acquiring new activities. The human being has the longest period of infancy. By infancy I do not mean alone the period when the child is in the cradle. Biologically it includes all the period of life from birth to maturity. It is the period of plasticity, the period of educability. After this period, the possibilities of education grow less and less. Perchance there are freshmen who may peruse this. I desire to give you a few words of comfort. You may be frequently derided by the learned sophomores who call you “ greenies ” or “ freshies.” Take comfort and regard the appellation “ freshmen” as a mark of honor rather than derision. To be fresh or to be green means that you are still growing. All should wish to be green and to grow as long as possible. May you live to a green old age. Even the sophomores are all right. Woodrow Wilson said, “A sophomore is one in whom the sap is rising but it has not yet reached his head. He will eventually mature.” Professor James says that one seldom gets an entirely new idea into his head after thirty. After that period one may erect a splendid structure upon the foundation already laid. But if any subsequent structure is to be reared the proper foundation must have been laid before that time. For “outside of their own business,” says James, “the ideas gained by men before they are twenty-five are practically the only ideas they shall have in all their lives.” We can not get any- thing new, for disinterested curiosity is past, instincts have died out, bonds of association have become fixed, “ mental grooves and channels set, the power of assimilation gone.” Hardly even is a foreign language learned after twenty spoken without a foreign accent. “In most of us, by the age of thirty, the character has set like plaster, and will never soften again.” The most possible should be made of early life, for, although it is a fact that the number of cells in a given brain is com- plete at birth, yet mental exercise must determine the number that becomes fully developed. Moreover, the period for development lies largely between birth and maturity. It is the period when nerve ETHICAL ASPECTS OF MENTAL ECONOMY 257 matter is plastic and when growth and replacement exceed disintegra- tion. Brain workers do their best between the ages of twenty-five and forty-five before that they are preparing for work, after that their work, no matter how extensive, is largely routine. Lawyers and physi- cians do much of their practise after forty, but the learning was ac- complished before forty or forty-five. Successful merchants lay the foundations for wealth and success in youth and middle life. The great men that we know are all old men; but the foundations for their greatness were laid when they were young. Philosophers have founded and announced their systems in youth and early manhood; divines and religious teachers have originated their creeds and have been most effective as preachers in early manhood. Statesmen have projected their greatest acts of legislation, diplo- macy and reform in early life. In the morning of life scientists have wrought out their data and practically formulated their theories; gen- erals and admirals have gained their greatest victories; lawyers have paved the way for leadership at the bar, physicians have laid the ground- work for their greatest discoveries, poets and artists and musicians have planned and in many instances executed their greatest master- pieces. You, young men and women of the colleges and high schools, are picked individuals. A process of selection and sifting going on for many years in your own lives, and for generations in your ancestors, determined who should go to college. The state endows its universi- ties to enable its intellectual élite to secure the development which their native worth makes possible. The function of the school and the university is not to create brains, but to mature them. The school is like a problem in multiplication in which the student is the multi- plicand and the institution the multiplier, and, as in mathematics, if we have significant figures for our multiplicand the result is significant, but if we have ciphers for the multiplicand the result must be zero. Your efficiency in life depends largely upon your physical and mental health and your habits of work, rest and recreation. To con- serve your inborn potentialities and to multiply your talents is not only a high privilege but your greatest immediate duty. To fail is to be morally culpable, to succeed betokens true wisdom and virtue. No worthier object of contemplation can occupy your mind than the So- cratic admonition, “ Know thyself.” VoL. LxXxI.—17. 258 POPULAR SCIENCE MONTHLY THE CHINAMAN AND THE FOREIGN DEVILS By CHARLES BRADFORD HUDSON ' DETROIT, MICHIGAN Wea ancient examination halls at Peking have been transformed into a military school. ‘To the western mind there is nothing startling in the item, nor significance beyond the fact that it suggests that China is at last rousing from her centuries of complacent intro- spection and retrospection, and purposes to learn something which the rest of the world has found useful. A mere change in the curriculum of certain Chinese students, it would seem, of less interest to mankind in general than if Oxford should suddenly abandon the study of divinity or the humanities. But to the Chinaman it means more. It is a change of greater moment, more revolutionary than would be the over- throw of the Manchu Dynasty. Indeed, a dynastic change would be comparatively an insignificant and commonplace event. In the four- teen hundred years since the course of studies was prescribed by which the Chinese student fits himself to enter the aristocratic order of the literati, and thereby to become eligible to government office, the celestial empire has undergone a full score of revolutions, each one of which has resulted in the establishment of a new royal line. But during that period, which has witnessed the birth, decadence and death of christian empires, the requirements of Chinese scholarship have been unchanged. Until to-day, the student who presented himself at the triennial exami- nation at Peking as a candidate for the highest degree attainable, the “Chin Shi,’ or ‘ Enrolled Scholar,’ has been questioned on precisely the same subjects, tested by the same literary standard in his essays, as his predecessor of the sixth century; and has prepared himself for the ordeal by the study of classics that were hoary before the christian era began. ‘The change has come. Philosophy must yield a place to the art of war. Its import to China, the most ancient, the most conserva- tive, the most peace-loving nation on earth, is beyond our power to estimate. Its portent to the world at large is hardly to be conceived ; tc be conjectured, however, on a review of some of the features of the rough schooling by which this placid people has been educated to its needs. It is many years since the powers began prodding the Yellow Dragon, with bayonets and otherwise, in the determination to awaken him from his lethargy; but it is only of late that they have begun to ask, with a faint quaver of trepidation, ‘ Suppose he should rouse . . THE CHINAMAN AND THE FOREIGN DEVILS 259 what then?’® The question has even provoked some slight symptoms of hysteria, expressed here and there, when the monster has shown signs of life in response to the systematic and persistent annoyance, in shrill clamors about the ‘ Yellow Peril,’ with chilly sensations at the recol- lection of the hordes of Jenghiz Khan. ‘The ery has been taken up, echoed, and having served its purpose as an interesting bogie for the newspaper-reading public, has been scoffed down; but there has re- mained more or less speculation, not unaccompanied by misgivings, as tc whether the dragon had not been better left asleep. The fact has been taken into consideration rather abruptly and quite seriously that he represents 400,000,000 people, capable of truculent forms of venge- ance on occasion, and animated by a national feeling of a definite and positive kind. These reflections might properly be productive of uneasiness did we not reassure ourselves with the self-satisfying as- sumption of the mental, moral and physical superiority of the Indo- European race, and the conviction that it is our destiny to inherit the earth. We indulge in a comparison of ourselves with the Mongolian in a way which leaves him relatively far down in the human scale, and have taken it for granted, hastily perhaps, that he can not rise. Ex- perience has shown in the past that he was averse to fighting, and that he could be expected to submit, with no resistance much more forceful than a protest, to whatever imposition or exaction any bullying occi- dental nation might see fit to make. As a consequence, the dealings of the christian nations with China have constituted a long series of outrages upon that country and of offenses to decency, at the catalogue of which it is difficult to say whether one should be more astounded at the Chinaman’s endurance, or humiliated by the shamelessness of the white man’s oppression. We have fairly won our title of “ foreign devils.” We bear it with composure, with a good-humored scorn or, at most, with a mild resentment that the Chinaman can be so un- reasonable as to give us the designation. But however we accept the term it is quite certain that he applies it with earnest sincerity, and that it is an expression of a hatred and contempt for the foreigner almost universal throughout the empire. There has been evidence enough of this hostility to make it seem worth the while to inquire what its basis may be, but the question is seldom raised. When raised it is usually answered by a vague refer- ence to the Chinaman’s “ ignorance,” to his fanatic antipathy to chris- tianity, his opposition to progress or his national egotism. To the first of these it may be rejoined that he is not ignorant, in the sense, at least, of being unlettered or unintelligent; for in no other country in the world is learning more wide-spread or more highly honored, no country has a greater literature, and few races are distinguished by keener intellect that the Chinese. Their learning is not ours, and judged by our standards their educational system is absurd; but it is 260 POPULAR SCIENCE MONTHLY the one avenue to political preferment or social eminence, and no village is too small or obscure to have its school, no boy too humble to be eligible to its advantages. If their studies are confined to the ancient classics, as were those of the European scholar not many gen- erations ago, the defect is in part compensated by the absolute thor- oughness required to enable a candidate to pass the examinations; and whatever the practical value of the learning, the mental discipline is of the most severe. It has produced a race of students; has developed an intellectual capacity which, when a young Chinaman enters a western university, makes him the peer of the best of his white fellows. It is true that the Chinese are ignorant of the outside world and its arts, and their ignorance is only surpassed by their indifference; but their hostility to them is not traditional. In medieval times there was a considerable and friendly intercourse with the nations of the west, and christian envoys, priests and traders were welcomed, with what- ever knowledge or commodities they could bring. From the seventh to the tenth century the Nestorian Church made many converts, and later the Dominican and Franciscan Orders established missions with- out opposition. In the fourteenth century Catholic churches were so numerous that the Papal See made China an archbishopric under John of Monte Corvino. For that remote period commerce with Europe was important, and flourished until overland communication was cut off by the rise of Islam, leaving China for two hundred years forgotten of the world. The attitude of the Chinese toward systems of faith other than their own has never been one of antagonism. In the first century an envoy sent out by the emperor to bring back the religion of the west returned with Buddhism, which was accepted as superior to the in- digenous form of belief, and has now a more numerous following than either Taoism or the philosophy of Confucius. Twelve hundred years later the Venetian travelers, the Polos, were sent as emissaries from Kublai Khan to the Pope with the request for instructors in christianity. So far as religious belief is concerned the Chinaman is as tolerant to- day as he was then. He has no enmity for christianity per se, and objects to it only because he fancies its purpose and effect are to alienate the Chinese convert—to make him, in his sympathies, a “foreign devil.” This suspicion is sufficient to rouse his hostility and provoke his violence. He hates the christian because he is a foreigner; not the foreigner because he is a christian. He is far too well-balanced and temperate to be a religious fanatic, and is possibly more liberal in his views of questions of faith and worship than are we. Taoism, the boundaries of the empire, side by side with the agnosticism and atheism of the Confucianists, and there is no record of religious wars or persecution, no history of an inquisition, no massacre of St. Bar- tholomew, no ostracisms because of faith or the want of it. The THE CHINAMAN AND THE FOREIGN DEVILS 261 Chinaman believes with moderation, and the gods he has bear lightly upon him. The coolie propitiates his Joss, but when the wooden god fails to respond in a satisfactory manner the devotee does not scruple to maltreat him. Recently the great viceroy, Yuan Shih Kai, ordered certain temples in Taotingfu to be cleared of their idols to make room for police stations, and the images were thrown into the river. To the worshipers it was a joke on the gods. “They are having their first bath!” said one, and the crowd laughed with sacrilegious glee. This is not the stuff of which the religious fanatic is made. The opinion that the hatred of the foreigners arises from opposi- tion to progress is based upon better grounds. The Chinaman has opposed it, has resisted it with an inertia as of the everlasting hills, but from his point of view he has been justified. One phase of western progress is the development and use of labor-saving appliances: but the introduction of such machinery into a Chinese community means calamity. Their economic conditions are adjusted with delicacy so great that it is only by incessant toil that the laborer can earn enough to keep himself and his family from starvation, and the foreign con- trivance which will accomplish fifty men’s work in one day may entail famine upon forty-nine and their dependants. From their standpoint the argument against machinery is forcible. We have excluded the Chinese coolie from this country merely because he is able to do more work and better work, and is willing to do it for less pay, than our white laborers, though the danger of starvation to the class with which the Chinese workman competed was not immediate, but extremely re- mote. There seems to be a suggestion in this that possibly the China- man is entitled to object, on his part, to the presence of the foreigner and his machinery. His right to the recognition of his objection is, of course, not to be considered by any power, because he is not yet strong enough to enforce it. There are indications that some day he may be. But even the question of domestic policy does not suffice to account for the intense hostility which the alien has met everywhere in China, manifested in repeated uprisings and the infuriate cruelty of mobs, and which is too universal and obstinate to be attributable to mere prejudice. The Chinaman is wholly rational—rational enough to per- ceive, after due deliberation, the benefits to accrue from the adoption of those products of western inventiveness which do not threaten his livelihood, as may be inferred from the existence of modern arsenals in full operation, from the rapidity with which railroad and telegraphic communication is being established throughout the realm, and from the evident purpose to learn more of the arts, peaceful and other, which have been developed in Europe and America. It is to be assumed that a people gifted with much good sense and a sobriety of mind beyond the ordinary will not cherish a race-hatred so deep-seated, persistent and uncompromising without good and ample reason. ‘The reason in this 262 POPULAR SCIENCE MONTHLY instance is not far to seek. Simply stated, it lies in the circumstance that they have found in their intercourse with white men that the white man is a scoundrel. Other races have learned the same lesson through experience disastrous just in proportion to the value of their territory or property in the eyes of the rapacious Caucasian, and that China has thus far escaped complete dismemberment is due solely to the mutual jealousy of the powers which have long had that ambition and design. Her losses of domain have not been great, but she has been made to suffer, nevertheless, as no other civilized nation since the wreck of the empire of the Incas by Spain. Her first contact with Europeans in modern times began early in the sixteenth century, and from the beginning it was of a nature to fully warrant the sentiment with which she still regards them. Successively, the French, Portuguese, Spaniards and Dutch descended upon her coasts, ravaged and destroyed towns, and massacred their inhabitants. The Portuguese captured Ningpo, and held it until the populace, enraged by their acts of cruelty and oppression, rose and drove them out with heavy loss of men and ships. Later, they seized and fortified the peninsula of Macao, and after repeated efforts to expel them the Chinese government granted the privilege of occupation, conditional upon the payment of 500 taels annual ground-rent. In the treaty it was specifically stipulated that China should retain sovereignty over the territory. This treaty, how- ever, was so manipulated by the Portuguese translator that according to the text of the copy which went to Lisbon all rights over Macao were ceded to Portugal, China being allowed merely to maintain a consulate. When at length the fraud became known at Peking the imperial gov- ernment protested, but was forced, in order to avoid a war with the invader, to formally cede the peninsula, which remains Portuguese terri- tory. The Crown of Portugal draws a small revenue from farming out the right to operate establishments for playing fan-tan, a game prohibited by the laws of China. In 1854 Macao became the seat of the infamous coolie traffic, which for a quarter of a century paled the worst horrors of African slavery. This trade was originated by the English to supply cheap labor to the colonists of British Guiana. In the early years of the enterprise the coolies were induced to emigrate on legitimate contract for seven years’ service at the rate of something over four dollars a month, with food, clothing and shelter provided by the planters. After the independence of Peru she entered the traffic to secure workmen for her mines and for the guano pits of the Chincha Islands, and Cuba followed her example to provide for her plantations. As the demand for the coolies increased the means employed in procuring them became more and more un- scrupulous. Labor agents infested the Chinese ports, the natives were decoyed by fraudulent representations, systematic kidnapping was in- augurated, armed junks were employed to raid the coasts for captives, THE CHINAMAN AND THE FOREIGN DEVILS — 263 and prisoners were purchased outright from the leaders of factions engaged in internecine wars. Depots were established at Macao where the victims were herded under heavy guard until sufficient numbers were obtained for a cargo, when they were crowded into transports and shipped under conditions of misery, filth and brutality which surpassed in atrocity those of the “ middle passage.” Arriving at their destina- tion, they were sold like cattle to the highest bidders, to enter a servi- tude which differed from slavery only in being for a limited period, and in the fact that their masters, having no interest in them as prop- erty of value, were concerned only to work them under the lash to the extent of their endurance. Those were fortunate whose fate did not land them in the Chincha Islands. Here they were forced to toil under treatment so inhuman that of the four thousand wretches im- ported from the beginning of the traffic until 1860 not one survived. Those who did not die from the effects of cruelty and exhaustion com- mitted suicide. The efforts of China to induce the powers to suppress the trade were of course unavailing. There was money in it. But when at length the scandal became intolerable some perfunctory measures were taken by those nations not financially interested, to end, or at least to modify, the worst of its features, and in about ten years they succeeded in making regulations, in concert with the Chinese government, which rendered it unprofitable. But China had gained additional experience of the “foreign devils.” It would be unfair to Portugal to cite her case alone. She is not unique, and far from conspicuous, among those who have proceeded on the assumption that China has no rights which any able-bodied nation is bound to respect. There has been a want of harmony in other matters, but not in this. The helplessness of their victim has made the same appeal to all, and they have responded in a course of brow-beat- ing and bleeding with a unanimity of impulse that is astonishing. The respectable Dutch were early in the game. In 1622, under no pretext of war, nor with better excuse than might ease the conscience of a pirate, they seized the Pescadore Islands, impressed the native inhabitants at the point of the bayonet and compelled them to build fortifications. From this stronghold they ravaged the coast and the Island of Formosa, pillaging and slaying, but, finding it unremunerative, finally wearied and withdrew. ‘The French were less direct in their aggressions and began their spoliation, not in China proper, but in the Kingdom of Annam, where a party of adventurers had gained a foothold in the latter part of the eighteenth century by aiding in the restoration of the deposed Annamese king, Gia Long. In 1859 the murder of a number of missionaries led to the invasion of Annam by the French and the seizure of several provinces. Later, the existence of mineral wealth in Tongking, an ancient dependancy of China, was reported by French 264 POPULAR SCIENCE MONTHLY explorers, and it was at once found necessary to despatch an expedition into that country for the ostensible purpose of suppressing disorders caused by bands of disorganized followers of the Tai-ping rebels. Dur- ing the operations of the expeditionary force it came into collision with the Chinese troops by which some of the towns were partly garrisoned, and at the end of the war France found the circumstance to be worth $15,000,000, which she compelled China to pay, in addition to the cession of Tongking, which is now a French province. But in 1882, before the hostilities had begun, and while the French minister was at Peking negotiating a settlement of matters connected with Tongking, certain French warships quietly dropped anchor in the harbor of Foochow. Their coming had no appearance of menace, and the Chinese were without suspicion that the visit was otherwise than friendly. The fleet lay for several weeks, and its officers had exchanged the usual courtesies with the authorities of the port; but suddenly, without the slightest warning, the ships opened fire upon the imperial arsenal, sank the Chinese gunboats at their anchorage before they could be got under way, and continued the bombardment until the destruction was complete. The action was wholly unexpected, unprovoked by any act of hostility on the part of China, and though the relations of the two countries were strained, diplomatic intercourse had not been in- terrupted. A more petty instance of outrage, but one quite as characteristic of the methods pursued by the nations, occurred in 1860, when the foreign legations were established at Peking. ‘The Chinese government leased to the French minister for residence at a nominal rental the un- occupied palace of one of the princes. The gentleman moved in, payed his rent for two years, then claimed ownership and declined to make further remuneration. The recent acquisition of territory by three great powers is a matter of familiar history. It was accomplished, on the part of Great Britain and Germany, by the use of a formula which has proved in the last fcrty years to be highly efficacious in extorting valuables from China in a civilized manner and with an appearance of respectability, and has been employed many times. The formula is simple in its nature; equally so in its application. A power demands a concession, usually of some desirable area of harbor frontage, and China, helpless to resist, has no sooner yielded than she has the diplomatic corps about her ears in a frenzy at the disturbance of the “balance of power.” Each diplomat waves a claim for indemnity, and China, thoroughly cowed by long experience, must restore the balance by further cession of property, or by the payment of an equivalent in gold. Thus, at the end of the Chinese-Japanese war, the victor restrained by concert of Russia, France and Germany from holding Manchuria as the fruit of conquest, had hardly evacuated Port Arthur before the place was occupied by the THE CHINAMAN AND THE FOREIGN DEVILS “(265 forces of the Czar, and with reiterated assurances of a perfectly. honor- able purpose to presently withdraw, they commenced the absorption of the 400,000 square miles which Japan had been forced to relinquish. At once Germany and England discovered that the “ balance of power ” had been deranged to a degree that required the cession of Kiao-chau to the one, and of Wei-hai-wei to the other. The balance of power! Unhappy China! But all these injuries, inflicted upon the most inoffensive race of people on earth, accompanied as they have been by every form of diplomatic bullying, coercion and insult, and not infrequently by armed invasion, sink into inconsequence in comparison with the super- lative infamy of the opium trade forced upon her by Great Britain. For centuries the production and use of the drug had been prohibited in the empire and punished with the utmost severity; but in 1773 the British East India Company, which had the monopoly of the article in India, smuggled a small shipment into the province of Kwang Tung. The profits of the enterprise proved to be great, and by the end of the century, notwithstanding the endeavors of the Chinese authorities to suppress it, the illicit trade had grown to important proportions. The government at Peking placed heavy penalties upon the importation, but through bribery and intimidation of the customs officials the traffic rapidly increased, and regular lines of swift, heavily armed schooners and junks set the laws at defiance. On the expiration of the charter of the East India Company in 1834 the opium monopoly fell into the hands of the British government, which took up the business with energy and protected it with the guns of a powerful fleet. Under these auspices the smuggling continued with practical impunity until at last, thoroughly alarmed at the rapid growth of the vice which was fastening itself upon his subjects in spite of the penalties of trans- portation or death for its indulgence, the Emperor ordered one of his most vigorous officers, Commissioner Lin, to stop the trade at what- ever cost. In 1839 this officer seized and destroyed at Canton an amount of opium worth $9,000,000, and exacted from the dealers, Chinese and foreign, pledges that they would not resume the traffic. But by. this time Great Britain was deriving an annual revenue of over seven million dollars from the smuggling, and outraged by the high-handed action of the Chinese government in venturing to enforce its own laws, promptly sent a military force to demand reparation. ‘The war was disastrous to China, and she was whipped into a treaty of “ amity and commerce,” compelled to cede Hong Kong to the British, and to pay $23,000,000 indemnity. The warning was ample, and the imperial officials dared offer no further hindrance to the admission of the “ for- eign devil’s dirt.” Even this condition of affairs was unsatisfactory to England, however, for the trade was still illicit, the goods contraband, and she was placed, by the unreasonable laws of China, in the position 266 POPULAR SCIENCE MONTHLY ofasmuggler. ‘The situation was not to be borne by any self-respecting nation, and she determined to amend it. The seizure, by Chinese officials, of the “ Arrow,” an opium schooner owned and manned by natives, but illegally flying the British flag, afforded the desired pretext, and in 1857 Great Britain again declared war. She was joined by the French, and at the end of the campaign, in 1860, China was forced to legalize the opium trade and pay an indemnity of $11,000,000. In all the annals of the crimes of nations there is no parallel with this one. In the seventy years since the British East India Company made its first venture with a ship load of the drug, the use of it has spread with appalling rapidity, and its victims are numbered by mil- lions. It has made its deadly inroad upon every social class, bearing destruction of mind and body. China has protested, pled and fought in vain. Asa last resort the Emperor wrote a personal letter to Queen Victoria, begging her benevolent aid in suppressing a trade so disastrous te his people, and offering any concession in return. The letter was unanswered, the appeal ignored. So, we are known to the heathen yellow man as “ foreign devils,” and the examination halls at Peking have been transformed into a military school! POE AS AN EVOLUTIONIST 267 POE AS AN EVOLUTIONIST By FREDERIC DREW BOND ee career of Edgar Allan Poe was a puzzle to his contemporaries and has been a puzzle to students of his life ever since. Though the mythology with which Griswold and others helped to embellish the poet’s biography has been cleared away, the correct summing up of his life seems still far off, and in seeking to find the principle of unity in that strange personality we can but confess ourselves baffled and per- plexed. Yet, in estimating Poe’s character, one portion of his work may be pointed out on which too little attention has been bestowed. Crude as Poe’s philosophic speculations sometimes were, yet foremost among them he entertained, in its broad outlines, that idea of the changes and development of the world which goes, nowadays, by the name of the theory of evolution. To show in what way a recognition of this fact would affect our estimate of him will not be attempted in this paper. It is here proposed simply to exhibit Poe’s views on this matter and to point out his place in the list of evolutionary thinkers. The history of the idea of evolution has been studied by Professor Sully? by H. F. Osborn? and by Edward Clodd,* but none of them mentions Poe’s name in connection with the subject. To “ Eureka,” the epitome of his thought on this matter, Poe himself attributed the highest value, but his biographers have shown scarcely an inkling of its importance in judging its author. Griswold in his “ Memoir of Poe ’’* remarks on the resemblance of “ Eureka” to the once famous anonymous work “The Vestiges of the Natural History of Creation,” and Professor Irving Stringham, of the University of California, has a critique on the work inserted in Woodberry’s “Life of Poe’® and also in Woodberry and Stedman’s edition of Poe’s works. The only article of value, however, on the subject that the present writer knows of is an essay referred to by Mr. Ingram in his “ Life of Poe”? by Wm. Hand Browne, entitled “ Poe’s Eureka and Some Recent Scien- tific Speculations,” which appeared in The New Eclectic Magazine in *“ Encyclopedia Britannica,” Art. “ Evolution,” Part II., Vol. VIII., p. 351. 2“ From the Greeks to Darwin.” °* Pioneers of Evolution.” ‘Page xliii. ° Pages 286-301. * Vol. IX., pp. 301-312. ‘Vol. IL., pp. 148, 296. Notice also the first paragraph in the introduction to Vol. XVI. of the Viriginia edition of Poe’s works edited by Jas. A. Harrison. 268 POPULAR SCIENCE MONTHLY 1868. It appears to have produced no permanent impression. Poe seems to have put certain of his ideas before scientific men during his lifetime, but received no encouragement. Commenting on a letter from the present writer on “ Eureka,” published in the Times Book Review, of Philadelphia, Mr. Henry Newton Ivor of that city wrote, under date August 21, 1901, to that periodical: My father, who knew the poet during his connection with William Burton, often told me that Poe had met with rebuffs from scientific men to whom he undertook to explain his belief in the development of things. To get to the starting point of Poe’s speculations we should per- haps, go back to his youth, when we find him under the double influence of the eighteenth-century French philosophers and of Coleridge and Schlegel. But how far these two streams of thought colored Poe’s philosophy is not easy to say. Most of his speculations seem deter- mined by the facts of contemporary science and his own intellectual activity. Not till his later years do we find any extensive expression of his views. “The Colloquy of Monos and Una,’’® “ The Island of the Fay,”*°, and “ Mesmeric Revelation ”** are some of the pieces in which he appears as a speculative thinker. But not till 1847, two years before his death, does he appear to have tried to form a definite system for himself. Early that year his dearly-loved wife died and her death seems to have impelled his mind towards attempting to unravel “the riddle of the universe.” Throughout the fall and winter of that year he elaborated his thoughts,’* and on February 3, 1848, an abstract of his speculations was delivered as a lecture at the Society Library of New York.** Shortly afterwards it was published by Putnam under the title “ Eureka.” Nothing better exhibits the intense belief of Poe at the time in the truth of his theories than the account given by Mr. George Putnam of their strange interview in regard to the publication of the work. According to this account, a gentleman one day entered the publisher’s office in a nervous and excited manner and requested his attention to a matter of the greatest importance. * The evidence for these statements is largely based on inferences from the contents and citations of Poe’s works, taken in connection with their dates of composition. A fragment of direct evidence in regard to the eighteenth-century writers may be found in Ingram, Vol. I., p. 52. The great influence of Coleridge on Poe is admitted on all hands. Cf. Woodberry’s “ Life,” pp. 91-93. ® Published ia 1841. ** Published in 1841. * Published in 1844. * See the interesting account, derived from Mrs. Clemm, in Didier’s “ Life.” * For contemporary newspaper notices of tne lecture see Woodberry and Stedman’s edition of Poe’s works, Vol. IX., pp. 312-315. ‘All [the papers] praised it,” says Poe in a letter to a correspondent, “—as far as I have yet seen —and all absurdly misrepresented it.” Ingram, Vol. II., p. 140. He excepts partially an article in the “ Express,” Virginia edition, Vol. I., p. 277 POE AS AN EVOLUTIONIST 269 Seated at my desk, says Mr. Putnam, and looking at me a full minute with his “ glittering eye,” he at length said, “I am Mr. Poe.” I was “all ear,” of course, and sincerely interested. It was the author of “The Raven ” and of “The Gold Bug.” “I hardly know,” said the poet, after a pause, “how to begin what I have to say. It is a matter of profound importance.” After another pause, the poet seeming to be in a tremor of excitement, he at length went on to say that the publication he had to propose was of momentous interest. New- ton’s discovery of gravitation was a mere incident compared with the discoveries revealed in this book. It would at once command such unusual and intense interest that the publisher might give up all other enterprises, and make this one book the business of his lifetime. An edition of fifty thousand copies might be sufficient to begin with, but it would be but a small beginning. No other scientific event in the history of the world approached in importance the orig- inal developments of the book. All this and more, not in irony or jest, but in intense earnest—for he held me with his eye like the Ancient Mariner. I was really impressed, but not overcome. Promising a decision on Monday (it was late Saturday), the poet had to rest so long in uncertainty, upon the extent of the edition, partly reconciled by a small loan meanwhile. We did venture, not upon fifty thousand, but five hundred.“ This account, which was written twenty years after the events it relates, seems more or less colored; it exhibits, however, sufficiently well, the value attached by Poe to his work. At the opening of “ Eureka” Poe thus states his purpose: I design to speak of the Physical, Metaphysical and Mathematical—of the material and spiritual universe,—of its Essence, its Origin, its Creation, its Present Condition and its Destiny. I shall be so rash, moreover, as to challenge the conclusions, and thus, in effect, to question the sagacity, of many of the greatest and most justly reverenced of men.” Following this, comes a satire on the exclusive use of either the deductive or inductive methods in the search for truth, purporting to be written by a student of our logic, a thousand years hence.** The skit is clever and is not wanting in some telling hits, but it is out of place and has probably caused many a reader to put down the whole essay. Then after some acute criticisms of a few metaphysical terms, such as “ Infinity” and a “ First Cause,”!* Poe proceeds to his main theme. “In the beginning,’ from “his spirit or from nihility,” “ by dint of his volition,” God created a single material particle in a condi- tion of the utmost possible unity and simplicity.*® “The assumption of absolute unity in the primordial particle includes that of infinite divisibility. Let us conceive the particle, then, to be only not totally exhausted by diffusion into space. From the one particle, as a center, 4 Putnam’s Magazine, October, 1869. Quoted by Ingram, Vol. II., p. 145. * Both Ingram (Vol. II., p. 144) and Woodberry (p. 285) are of this opinion. 16“ Works,’ Vol. IX., p. 5. Works, edited by Steadman and Woodberry, “ Eureka,” Vol. IX., pp. 7-18. This edition of Poe’s works is referred to throughout the references in the present article. * Ibid., pp. : 0-24. ” Pages 26, 27. 270 POPULAR SCIENCE MONTHLY let us suppose to be radiated spherically—in all directions—to im- measurable but still definite distances in the previously vacant space—a certain inexpressibly great yet limited number of unimaginably yet not infinitely minute atoms.”*° Differences of size and form taken conjointly cause differences of kind among these atoms.** The natural tendency of these subdivisions of matter is towards the unity whence they sprang. On the fulfilment of the radiation, the diffusive energy being withdrawn, to avert this tendency, and the con- sequent absolute coalition of the atoms, repulsion makes its appear- ance.** These two principles, attraction and repulsion, being the “ sole properties through which we perceive the universe,” “we are fully justified in assuming that matter exists only as attraction and repul- sion—that attraction and repulsion are matter, there being no con- ceivable case in which we may not employ the term “ Matter,” and the terms “ Attraction” and “ Repulsion,” taken together, as equivalent, and therefore convertible, expressions in logic.”** The nature of repulsion Poe refuses to attempt to determine, but he states it to be identical with electricity. To it we should probably refer the various physical ap- pearances of lght, heat and magnetism, and still more so the phe- nomena of vitality, consciousness and thought. Attraction is the ma- terial, repulsion the spiritual principle of the universe.2* As Poe declares that both together constitute matter, he thus states a sort of crude monism. Since the diffused matter was radiated in a generally equable man- ner, we may conceive it as arranged in concentric spherical strata about its origin. This at once leads us to the explanation of the mode in which attraction acts—the reason, that is, why gravitation varies in- versely as the square of the distance between the attracting masses. For, since the surfaces of spheres vary as the square of their radii, the number of atoms in each concentric spherical stratum is proportional to the square of that stratum’s distance from the center. But as the number of atoms in any stratum is the measure of the force that emitted that stratum, that force itself is directly proportional to the square of its stratum’s distance from the center. Now, on the ful- filment of the diffusion, the modus operandi of the attractive force is, of course, the converse of that of the diffusive; in other words, each particle of matter seeks its original condition of unity by attracting its fellow-atoms with a force inversely proportional to the square of the distances between them.*® 7 <* Kureka,” p. 28. 1'Pages 29, 30. = Pages 31-33. * “ Eureka,” pp. 34, 35. * Page 34. »* Eureka,” pp. 35-66. In a MS. note, referring to the diffusion, Poe says: “Here describe the process as one instantaneous flash.” (Page 52.) POE AS AN EVOLUTIONIST 271 Matter being thus distributed, attraction causes it to aggregate in nebulous patches, which proceed to undergo a development similar to that described in Laplace’s “ Nebular Hypothesis.” Our solar system, beginning in the form of a nebula, assumed a spherical shape and, as its constituent atoms sought its center, began to revolve. As the velocity of the revolution increased, the “centrifugal force” got the better of the centripetal, and a ring of matter was detached from the nebula’s equator; this ring finally condensed into the planet Neptune. Shrinking in size, the nebula, in lke manner gave birth to the other planets, including the earth, and finally arrived at the size in which we now know it as the sun. Similarly, during their condensation, several of the planets threw off satellites.?® In the following paragraphs Poe sums up the cosmic development and gives an account of the changes on the earth’s surface: In speaking, not long ago, of the repulsive or electrical influence, I remarked that “the important phenomena of vitality, consciousness and thought, whether we observe them generally or in detail, seem to proceed at least in the ratio of the heterogeneous.” I mentioned, too, that I would recur to the suggestion; and this is the proper point at which to do so. Looking at the matter, first, in detail, we perceive that not merely the manifestation of vitality, but its importance, consequences, and elevation of character, keep pace very closely with the heterogeneity or complexity of the animal structure. Looking at the question, now, in its generality, and referring to the first move- ments of the atoms towards mass-constitution, we find that heterogeneousness, brought about directly through condensation is proportional with it forever. We thus reach the proposition that the importance of the development of the terrestrial vitality proceeds equably with the terrestrial condensation. Now, this is in accordance with what we know of the succession of animals on the Earth. As it has proceeded in its condensation, superior and still su- perior races have appeared. Is it impossible that the successive geological revolutions which have attended, at least, if not immediately caused, these suc- cessive elevations of vitallic character—is it impossible that these revolutions have themselves been produced by the successive planetary discharges from the sun; in other words, by the successive variations in the solar influence on the Earth? Were this idea tenable, we should not be unwarranted in the fancy that the discharge of yet a new planet, interior to Mercury, may give rise to a new modification of the terrestrial surface—a modification from which may spring a race both materially and spiritually superior to man.” The statement of Poe in this passage, that “ heterogeneousness, brought about directly through condensation, is proportional with it forever,’ appears to contain the germ of Herbert Spencer’s developed formula: “ Evolution is a change from an indefinite, incoherent homo- geneity to a definite, coherent heterogeneity through continuous dif- ferentiations and integrations.”28 Noteworthy, also, is Poe’s statement of the correlation between mental development and physical organiza- tion. * Pages 66 et seq. 7“ Fureka,” pp. 80, 81. * This is the form in the 1862 edition of “ First Principles.” In the later editions the formula reads: “ Evolution is an integration of matter and concom- 272 POPULAR SCIENCE MONTHLY The most interesting point about the whole passage, however, is probably that connected with Poe’s ideas on the origin of animal organisms. Is he here stating the true theory of the descent of each from lower forms? Or, is his view a revival of that held by several Greek philosophers and in modern times by Duret and Oken, of the direct production of species by natural causes??® In Poe’s tale “Some Words with a Mummy,” published in 1845, the resuscitated Egyptian replies to a query concerning the creation, thus: During my time I never knew any one to entertain so singular a fancy as that the universe (or this world, if you will have it so) ever had a beginning at all. I remember once, and once only, hearing something remotely hinted, by a man of many speculations, concerning the origin of the human race, and by this individual the very word Adam (or Red Earth), which you make use of, was employed. He employed it, however, in a generical sense, with reference to the spontaneous germination from rank soil (just as a thousand of the lower genera of creatures are germinated)—the spontaneous germination, I say, of five vast hordes of men, simultaneously upspringing in five distinct and nearly equal divisions of the globe.” How far this is jest and how far earnest is hard to say. Of the mental development of man, Poe does not speak in “ Bureka.” From passages elsewhere (chiefly in “ Marginalia”) he seeems to have thought humanity had progressed along religious, sci- entific and esthetic lines, but pessimistic remarks of an opposite char- acter are not wanting in his writings. The only passage elsewhere which alludes to the subject is con- tained in a letter, written shortly after the publication of “ Eureka ” to the editor of the “ Literary World” in answer to some strictures a correspondent had made on the work. It reads as follows: “The third misrepresentation lies in a foot-note, where the critic says: ‘ Further than this, Mr. Poe’s claim that he can account for the existence of all organic beings—man included—merely from those principles on which the origin and present appearance of suns and itant dissipation of emotion: during which the matter passes from an indefinite, incoherent homogeneity to a definite, coherent heterogeneity; and during which the retained motion undergoes a parallel transformation.” “ First Principles,” p. 334. There seems to be considerable correspondence between Poe’s “ condensa- tion” and Spencer’s “ integration.” * The following extract from Oken deserves to be cited as showing how, in any event, Poe’s views were as reasonable as those propounded by one regarded as a forerunner of Darwin: “ Man also is the offspring of some warm and gentle seashore, and probably rose in India, where the first peaks appeared above the waters. A certain mingling of water, of blood warmth, and of atmosphere, must have conjoined for his production, and this may have happened only once and at one spot.” Quoted by H. F. Osborn, in his work “ From the Greeks to Dar- win,’ p. 127. Among the Greeks who propounded the hypothesis of the direct natural production of organisms from the elements were Thales, Anaxagoras and Empedocles. eey Works,” Vol. 1157p. SOL: POE AS AN EVOLUTIONIST 273 worlds are explained, must be set down as mere bald assertion, with- out a particle of evidence. In other words, we should term it arrant fudge.’ The perversion at this point is involved in a wilful misap- plication of the word ‘ principles.’ I say ‘ wilful,’ because at page 63 I am particularly careful to distinguish between the principles proper, Attraction and Repulsion, and those merely resultant subprinciples which control the universe in detail. To these subprinciples, swayed by the immediate spiritual influence of Deity, I leave, without examination, all that which the student of theology so roundly asserts T account for on the principles which account for the constitution of suns, etc.”*! This passage, it is plain, is as indecisive as the text of the essay. On the other hand, one with Poe’s wide knowledge can hardly, it would seem, have lacked knowledge of Lamarck’s theories, nor was he ignorant of the then recent work, “ The Vestiges,” though he had not then actually read it (in a letter to Geo. E. Isbell, he in- quires how far “ Eureka” is at one with the “ Vestiges’*?). But Poe’s interest does not seem to have centered on what would be now termed the biological side of the matter. Having described the development of the universe, Poe, in passages whose sweep and power remind one of Tennyson’s “ Vastness,” pro- ceeds to set before us its present condition and immensity.** Then, finally, he pictures the inevitable dissolution of it all, when stars and planets will at length lapse into the substance of one central orb. Here attraction will finally predominate over repulsion, complete unity obtain, and matter without attraction and repulsion will again sink “ into that Material Nihility from which alone we can conceive it to have been evoked, to have been created, by the Volition of God.’’** The out- come of the whole process Poe sums up in the following words, in which he restates the old doctrine of the universe as being in a state of perpetual flux: ; On the universal agglomeration and dissolution, we can readily conceive that a new and perhaps totally different series of conditions may ensue; another creation and radiation, returning into itself, another action and reaction of the Divine Will. Guiding our imagination by that omniprevalent law of laws, the law of periodicity, are we not, indeed, more than justified in entertaining a belief—let us say, rather, in indulging a hope—that the processes we have here ventured to contemplate will be renewed forever and forever and forever; a novel universe swelling into existence, and then subsiding into nothingness, at every throb of the Heart Divine? * For, in this everlasting metamorphosis, every “ creature ”—to use Poe’s term—both those we call living, and those to which we deny the 3 Griswold, p. xliv. 2 Virginia edition, Vol. I., pp. 277, 278. << Hureka,” pp. 81 et seq. % “ Hureka,” pp. 115-133. “ Hureka,” pp. 133, 134. VoL. LXx1.—18. 274 POPULAR SCIENCE MONTHLY name, because we do not perceive the vital operations, are all, in a measure, possessed of life and consciousness. ‘The cosmos is, as it were, composed of cycles of minds within cycles, the less within the greater, and all within the Divine Spirit, unto which all things, on their dis- solution, return.*® From the preceding sketch, it will be evident that, in its important features, “ Eureka” is a prevision of the modern doctrine of evolu- tion. In the statements that the universe is in a perpetual flux, that it is now evolving and will in the future dissolve, that it has developed from a condition of homogeneity, and that our own system sprang from a nebula, Poe is in accord with the Spencerian philosophy and very probably with the actual facts; while in the assertions that the earth has, during successive geological ages, produced a higher and higher organic life characterized by: an ascending development of mind, hand in hand with an increasing complexity of the physical organization, he is stating what are now known to be simple scientific facts. Errone- ous, of course, the details of his conceptions very frequently are ;*7 but this is common to him with the pioneers of every great idea. Only in the course of time does the germ of truth they discover attain its full growth and reveal its true character. To criticize “ Eureka” from a contemporary standpoint would be as beside the mark as to treat the “ Naturphilosophie ” of Schelling or of Hegel in the same way.** ° It was a remark of John P. Kennedy, Poe’s old friend, that the latter “wrote like an old Greek philosopher” and any one who reads the fragments of the Greek thinkers before Aristotle can easily verify for himself the truth and aptness of the statement. The merits of Poe, in common, more or less, with the other pre-Spencerian evolutionists le in how far and how truly his genius enabled him to divine the mode of development of the universe. Owing to the causes pointed out at the beginning of this paper, it is improbable that “ Eureka” had any influence in preparing the way for the reception of evolutionary ideas, a little later; at the most such influence must have been of the slightest, for though this work was early translated into foreign languages, the failure to find fitting recognition of its true character, and the general obscurity in which it has lain, seem to preclude any such likelihood. Its interest lies in the light it throws on its author and in the honorable place to which it assigns him in that long line of thinkers from Thales to Darwin. * Tbid., pp. 1384 ad fin. lib. “Tt may be added that ‘Eureka’ contains some implicit contradictions also, due apparently, to an advance in the author’s thought. * Nor is it any exaggeration to say that Spencer’s “ First Principles” is far from immune from heavy critical attacks (as witness J. Ward’s “ Naturalism and Agnosticism”) and that it is literally true that the scientific eminence of Spencer’s work over “ Eureka” lies more in its form than in its contents. MARS. AS SEEN IN LOWELL REFRACTOR 275 MARS AS SEEN IN THE LOWELL REFRACTOR. By G. R. AGASSIZ Aes writer has lately enjoyed the great privilege, as Professor Lowell’s guest, of observing Mars through nearly one presenta- tion,! in the great 24-inch refractor. Few people have had the opportunity of observing Mars at Flag- staff, and there is much scepticism afloat concerning the character of the markings of the planet, more especially as regards the double canals. So the writer proposes to give a short account of what can be seen, in the Lowell refractor, in one presentation, by any one of good eye- sight, who is somewhat familar with the use of a telescope. The writer also wishes to give a description of the methods employed in observing, and the reasons for using them. He will also give a few reasons, which appear to him conclusive, to show that the double canals are actual phenomena, and not the result of diffractive effects in the telescope. Few astronomers appear to realize how exceptionally excellent the seeing is in the clear dry air of Flagstaff, on a quiet night. It is so good, in fact, that a comparative novice appears to be able to see the planet more distinctly in one presentation there than Schiaparelli, at Milan, ever did. During the time of the writer’s observations, the diameter of Mars increased from 12” to 18”. The eyepiece used in observing was usually a 25 mm. orthoscopic, Zeiss, which gives a remarkably large flat field. This gives, on the 24-inch refractor, a power of 393. So that the apparent size of the disk of Mars was about 2.6 times the diameter of the Moon, as seen by the naked eye, at the beginning of the writer’s observations, and 3.9 times at the end.? This is amply large enough to distinguish a vast amount of detail, when the seeing is sufficiently good to disclose it. Sometimes, when the seeing was unusually good, an eyepiece of 20 mm. would be tried, giving a power of about 490; but this was rarely used to advantage. When the seeing required a less power than the 25 mm., the planet could not be ob- served satisfactorily. A circular disk was fitted over the eyepiece, containing an assort- ment of orange-yellow, and neutral-tinted glasses; any one of these could, at will, be revolved in front of the eyepiece. These glasses serve in a marked degree to bring out the contrasts on the planet. -1¥From April 28toJune2,1907.—™S ? With this power Mars appears about 5.2 times the diameter of the moon, at opposition in 1907. 276 POPULAR SCIENCE MONTHLY How little effect chromatic aberration plays in the observation of planetary detail may be judged from the fact that all the observers at Flagstaff preferred a neutral-tinted glass to a monochromatic one. The action of a shade in bringing out detail appears to be some- what as follows: In viewing a point of light through a telescope of a given aperture, the first minimum of the curve of diffraction, or the middle of the first dark ring, will always be at a given distance from the point of light, but the spurious disk will fade away, out of sight, be- fore it reaches the minimum; and the fainter the point of light, the smaller the spurious disk. As the point of lght approaches invisi- bility in the telescope, the spurious disk approaches zero. Now sup- pose we consider the light bordering a dark line on Mars as made up of numberless points of light. These points of light are excessively faint, compared with points of light on the sun, or with the light from a star. Their spurious disks are therefore extremely small, so that very little light spills over on to the dark markings; and that is the reason we are able to make out such fine detail on the planet. Now, although small, the spurious disks of these numberless points do diffuse some light on the fine dark markings. By using a shade, we decrease the light from these points, and thus reduce the size of their spurious disks. Therefore less light falls on the dark markings, and the sharp- ness of their edges is increased. Jt is further found at Flagstaff that diaphragming the aperture in- creases the seeing. Langley, in his article on soaring birds, has shown that there are constant small changes of velocity “ within the wind.” Now these pulsations must cause waves of rarefaction and condensation, which may be represented as an irregular wave curve, sweeping past the objective. This will cause the planet to swing in the field of the telescope, as the rays are refracted by a layer of denser or rarer air. Now it is evident that the smaller the aperture of the objective, the less variation of the curve will there be in front of the objective at any given instant, or the more homogeneous the air in the path of the rays entering the eye at any given moment. So that, though a smaller objective will not diminish the swinging of the planet in the field, it will diminish the blurring within the planet, and help bring out the detail. Thus, the smaller the objective, the better the seeing, other things being equal. In practise the best results were obtained with a 12-inch diaphragm, as below this the loss of light and of effects due to increasing the size of the spurious disk began to be more powerful factors than the advantages gained from better seeing. So importantly essential are the shaded glass, and the diminution of the aperture to the study of Martian detail at Flagstaff, that without these aids it would be excessively difficult to make out any of the fine detail on the planet. It is a mistake to suppose that an observer who has a very keen sight for a small star will necessarily be a good observer of planetary MARS AS SHEN IN LOWELL REFRACTOR 270 detail. Indeed it often seems to be the reverse; as if an eye, sensitive to light, were not as acute for form. Now it is well known that no two objects can be separated by the human eye that do not fall on more than one cone in the fovea, or central pit of the retina. So may it not be that an eye, very sensitive to light, has unusually large cones in the fovea, while one acute for form has small ones? There seems to be a great reluctance to accept the finer markings on Mars as established facts, and their objective reality has been questioned by all kinds of doubts and theories by all sorts of men. It might be well if some people, who explain away the markings on the supposition that they are optical illusions, would take the trouble to follow up their theories, see where they lead to, and work out what the appearance of the markings would be if due to the causes they suggest. A Professor Douglass, of Arizona, has lately suggested that the canals are nothing but the black rays that can be seen radiating from a black spot, on a hght ground, when looked at with a small screen placed in front of the pupil of the eye, so that the light enters only around the edges. According to Professor Douglass, the black oases are the only real things in the canal system, while the canals themselves have no tangible existence, and are nothing more than these black rays issuing from the dark spots. In the first place, no eyepieces, constructed on any such principles as Professor Douglass uses to see these rays, are known at Flagstaff. Furthermore, the oases are more difficult objects to see than the canals. The latter are often visible when the former are not. It would seem that even Professor Douglass should find it hard to admit that, at such times, the canals are visible radiations from invisible spots. But let us see what the canals would look like if actually due to this cause. These radiations are due to irregularities in the crystal- line lens, and are constant for an adult, but vary with each individual. So that any one, looking at the planet, would see an exactly similar set of radiations issuing from each oasis. The planet would be covered with a quantity of black spots, all with similar radiations, and all absolutely independent of each other. For no two radiations from different spots would ever, except by the rarest chance, run into each other to form a straight unbroken line, connecting the two spots. The radiations would also be entirely different for each individual. As one of the most striking features of Martian detail is the manner in which the canals connect and interlace the oases, further comment seems un- necessary. It has also been suggested that the so-called canals may not be lines at all, but merely a disconnected string of broken markings, a sort of irregular dotted line. A series of observations at Flagstaff, conducted by several individ- uals, has shown that the eye is extremely sensitive toa break in a line. 278 POPULAR SCIENCE MONTHLY A series of lines, .8 mm. wide, was viewed from a distance of 17 feet. Each line was made up of 10 mm. sections, separated by small inter- vals that were the same between the sections of each line, but differed for every line. It was found that a line, whose sections were .5 mm. apart, was visible as a discontinuous line. A line with the sections .25 mm. apart appeared continuous. With the power usually used at Flagstaff, the first figures would correspond on the planet at opposition to a line five and a half miles wide® visible as a discontinuous line, if the sections were eight miles apart. That the Martian markings should be composed of a series of dotted lines, separated by intervals never greater than eight miles, would seem far more wonderful than the canals themselves. There is a wide-spread feeling that the double canals are due to diffractive effects in the telescope. The writer wishes to state, at some length, why it appears to him that.this can not be the case. The writer has made many experiments, with various telescopes, on dark lines on a light field viewed by reflected light. In no case has he been able to detect diffractive effects that in any way resemble the double canals of Mars, as seen in the Lowell refractor, while, on the other hand, parallel lines, close together, bear a striking similarity to the double canals. In dealing with this subject, it is surprising to find how litle is really known of diffractive effects caused by a dark line on a light field. This is the gist of the whole matter, and is a very different thing from the well-known effects of diffraction obtained when viewing a point, or a line, of light on a dark field. In viewing a luminous point on a dark field through a given tele- scope the distance of the rings of diffraction from the center of the : Q : cr spurious disk may be easily found from the formula ¢== —, where = ¢ is the angle measured from the objective to the focus; ¢-is a con- stant for each maximum or minimum; A is a wave-length, and r is the radius of the objective. Now the second maximum, or the radius of the first bright ring, measures about 0”.31 in the Lowell refractor. If we extend this point to form a line, the ring will be transformed into * Various observers have experimented at Flagstaff at different times with wires stretched against the sky, viewed at ever increasing distances. The dis- tances at which a wire was distinctly visible varied with different individuals, and corresponded to an angular width for the wire varying from .69” to .93”. Looking at Mars at opposition, with a power of 400, these angles would corre- spond on Mars to widths of from 0.31 to 0.42. miles. Making all possible allow- ance for loss of light, ete., in the telescope, it seems probable that, under favor- able circumstances, a line less than a mile wide could be detected on the planet. By comparison with the finest micrometer threads, some of the single canals are estimated to be as much as 35 miles wide. The width of the various double canals, which remains constant for each canal, is estimated to range from 2° to 5° on the planet. This is found, by various terrestrial experiments at Flag- staff, to be far wider than lines that can be easily separated by the eye. MARS AS SHEEN IN LOWELL REFRACTOR 279 two lines, one on each side of the source of light, at a distance of 0”.31 from it, and, since the second maximum has but .017 the intensity of the first, the outlying lines will be but .017 of the brilliancy of the central one. On Mars we have to consider dark lines on a light field, and litle seems to be known of their diffractive effects. There is a disposition to assume that we are here dealing with an inverted diffraction curve. Personally, it seems to the writer that there is no similarity between a bright line, whose light waves produce diffractive effects, and a dark line that emits no light waves. But let us assume that, somehow, the dark line on a light field will produce the same diffractive effects as a light line on a dark field. Then, were the double canals due to this diffraction, they would appear as follows on the planet, when seen in the Lowell refractor. Hach and every canal would ap- pear triple, the outer lines would always be separated by 0”.31 from their primary, and be .017 less distinguishable than it. Furthermore, there would be a dark ring around every oasis. No triple canal has ever been observed on Mars, nor has any ring ever been seen around an oasis. The distance from the first minimum to the second maximum on the diffraction curve measures about ”.08 in the Lowell refractor. Now if the double canals were dark bands of a width of ”.16, then the points of light on the planet, at such a distance from the band that their first minima fell on its edge, would cast the light of their second maxima in the center of these bands, and these maxima, from the points on each side of any band, would overlap. It is conceivable that such an effect might look something like a double canal, were it not for the fact that the diffracted light from all the other neighboring points of hght would swamp and drown any such illusion. Supposing, however, that the double canals were really such dark bands, illuminated in their centers by the second maxima of the fringing light, then the double canals would always appear very nearly 0”.16 apart, which would correspond to about 1°.5 on the planet, when its diameter was 12”. But as the planet approached, since the distances apart of the maxima and minima in the focus of the teles- cope remain constant, the widths of the bands would no longer fit them, and the effect would be lost. Thus it follows that these bands of uniform width could never appear double, except at one given distance of the planet. There are certain rules that the double canals should observe if they were due to diffraction, but they follow none of these. They should (since the size of the rings of diffraction remain constant through a given aperture) appear nearer together, in degrees on the planet, as Mars approaches; instead of which they remain the same size. They should (as diffractive effects vary in size inversely as the radius of the objeciive), as the objective is diaphragmed down, appear 280 POPULAR SCIENCE MONTHLY farther apart; but in fact diaphragming has no effect on their width. Not only should all the canals appear double, but they should all seem the same width. Less than one eighth of the canals have ever been seen to be double; and the double canals vary from each other in width, ranging from 2° to 5°. In drawing A: 1 (the Euphrates) appears much wider than 2 (the Astaboras), while 3 (the Protonilus) is narrower than either; 4 (the Vexillum), which is a double canal, the writer was unable to resolve, but he could never have classed it with 5 (the Astrusapes). This last appeared as a sharp dark pencil mark, as, indeed, do all the single canals, when the seeing is really good. The double canals then come out like the lines of a railway track seen from a half-distant hill. If the double canals are really due to diffractive effects, how is it that only those are able to distinguish them whose eyesight is suffi- ciently good to obtain an exceptional view of the planet? Should not any one who can see the single canals be able to see them double? MARS AS SHEN IN LOWELL REFRACTOR 281 However, these remarks are probably quite useless. No one of good eyesight, who has seen Mars at Flagstaff, on a night when the seeing s really good, needs any arguments to convince him that what he sees is real. And no one who has made up his mind beforehand, without seeing them, that the double canals are due to diffraction, is likely to be influenced by these words. It would seem almost unnecessary to state that no one for a moment supposes that the lines that one sees are actual streams of water. They are thought to be broad stretches of vegetation, dependent on channels of water running through them. So would the valley of the Nile appear to a distant observer, who would distinguish the dark fertile valley against the sands of the desert, long before he could see the river itself. During the writer’s visit to Flagstaff, he saw 77 canals, 20 oases, and 11 double canals,* all of which, with one exception, could he readily identified on some one of Lowell’s maps, though it was some- times necessary to consult a map of an earlier date than the opposition cf 1905, to find them. Each of the drawings is the accumulated result of some 15 or 20 minutes at the telescope, so that no one of them represents everything seen in a single night. It must not be imagined that any drawing represents what the observer sees the moment he looks through the telescope. Instants of exceptional seeing flash out, here and there, at different spots on the planet. It is not till the same phenomena repeat themselves in the same way, in the same place, a great number of times, that the ob- server learns to trust these impressions. One has to keep one’s mind constantly at the highest pitch to catch and retain what the eye sees. It is like looking at a Swiss landscape from a high Alp, with the summer clouds sweeping about one. Now the mist rolls away, reveal- ing a bit of the valley, and shuts in again in a moment; while in some other spot the clouds break away, and disclose a jagged summit, or a portion of a shining glacier. Any one who has been fortunate enough to have had a really good view of the lineal markings on Mars is bound to be much impressed by their artificial appearance. So that, unless he has an inborn prejudice against the idea, any theory that accounts for the canals as the effort of intelligent beings to accomplish some definite object will not appear fanciful. Lowell’s theory that we have here evidence that the inhabitants of Tr *There are known at present 436 canals, of which 51 are double, and 186 oases. These are never all seen at one opposition, not only because of the dif- ferent tilts of the planet, but also because neighboring canals alternate in appear- ing and disappearing at different oppositions. Accepting Lowell’s theory that the canals are areas of vegetation bordering artificial channels for irrigation, this could be accounted for by the fact that when the canals do not appear, the land is lying fallow. 282 POPULAR SCIENCE MONTHLY Mars are struggling to preserve their existence by a planet-wide sys- tem of irrigation seems to be gaining ground; although he has had to contend against something of the same opposition that confronted Copernicus, Bruno and Galileo, and for very much the same reasons. The human mind resents anything that tends to belittle it, or its sur- roundings, and will not tolerate the idea of a rival. It would seem, in all fairness, that a theory that fits all the ob- served facts as beautifully as Lowell’s does deserves something better than disdainful disrespect, even from the most conservative. It is certainly far better than any theories and objections that do not meet the facts at all. As yet no other theory has been suggested that in any way accounts for the Martian markings. Until one is evolved that accounts for the facts better, Lowell’s theory should be accepted, by the most sceptical, as the only working hypothesis yet devised. A very noteworthy achievement in the recent study of Mars is the series of remarkable photographs of the planet, taken by Mr. Lamp- land at Flagstaff. Already he has succeeded in photographing many of the canals, and at the date of this writing’ he has just photographed the Gihon double. It seems as if, with the methods at present available, we probably shall not greatly increase our present knowledge of the planet. Even photography will probably be useful chiefly as a means of convincing the sceptical. But who can tell what the future may have in store? What astronomer of the early nineteenth century would have dreamed ef the possibility of detecting. the composition of the stars, or deter- mining their velocity in the line of sight? Some day a new method may increase our knowledge of Mars, as much as the discovery of the spectroscope opened up the heavens. To most people “the proper study of mankind is man.” But to those of us to whom the fact that we believe we have detected evi- dence of intelligent life in another planet seems of absorbing interest, Mars appears by far the most fascinating object in the heavens. S July, 1907. THE PROGRESS OF THE PROGRESS HERMANN VON HELMHOLTZ THE nineteenth century is distin- guished for the advance of science and | the spread of democracy, and science is dominant as its applications have supplied the economic conditions that make democracy possible—general edu- cation, relative leisure and compara- tively broad interests for a majority of the people. We may consequently regard it as probable that the greatest men of the century were its scientific | leaders, and that they will ultimately be held in higher honor than the au- thors or artists, than the statesmen or soldiers. The doctrines of the con- servation of energy and of organic evo- lution are the two greatest generaliza- tions of modern science. Each has had its historical development both before and after, but is primarily asso- ciated with the one great name. We may believe that in the future every- thing connected with the life and work of Helmholtz or of Darwin will be of the deepest interest, and it is fortu- nate that the biographies that have been published are so adequate. “The Life and Letters of Charles Darwin,” by his son, Dr. Francis Darwin, with the supplementary volumes of letters give a sympathetic and vital reflection of the noble and simple man and of his performance. The biography of Her- mann von Helmholtz by Professor Leo Kénigsberger makes a more mechan- ical impression, but it gives a correct and useful account of the vast range of work accomplished by Helmholtz, and those facts of his private life that can be related objectively. This biography published in 1902 and 1903 has been abridged and trans- lated into English by Lady Welby, with a preface by Lord Kelvin, and is. , berg SCIENCE 283 OF SCIENCE now published by the Clarendon Press of Oxford. Of the eight portrait plates in the original, three are repro- duced in the translation. In the two portraits by Lenbach the features are idealized. The bust by Hildebrand, made in 1891, is not given in the English volume, but more truly represents Helmholtz as he appeared during his visit to America toward the end of his life. The paper on the conservation of energy, printed separately in 1847, after having been rejected by the lead- ing German physical journal, may have been technically anticipated by Mayer and Joule, but it is the cornerstone of modern physical science. When this paper was published, Helmholtz was an army surgeon at Potsdam, his father, who was a teacher of classical languages, not being able to afford the cost of a university education. Thanks to von Humboldt, he was re- leased from the army to _ become teacher of anatomy in the Berlin Academy of Arts. During his whole life, Helmholtz was deeply interested in the plastic arts, in music and in literature, thus demonstrating that there is no incompatibility between science and the fine arts. Of equal significance is his constant concern with philosophy. Helmholtz became professor of physi- ology at Kénigsberg in 1849; he re- moved to Bonn in 1855 and to Heidel- in 1858, remaining there for thirteen years. During this period he measured the velocity of the nervous impulse and prepared his great works on vision and on hearing, of which the ophthalmoscope was a_ by-product. Helmholtz’s primary interests were al- ways in mathematical physies, and he somewhat 284 POPULAE SCIENCE MONTHLY HERMANN HELMHOLTZ AT THE AGE OF TWENTY-SEVEN. in 1848, a year after the publication of the paper on the conservation of energy. the he consequently .welcomed a call to ehair of physics in Berlin. Later organized and became the first presi- of the tional laboratory of physics and tech- dent * Reichsanstalt,’ a na- nology. During these years, he made his great contributions to thermody- namics and electromagnetism, and with his pupils, Hertz, Lenard and others, gave to mathematical physics its dominant position among the sciences. All the while Helmholtz gave con- From a daguerreotype taken tinually public addresses and popular lectures, and was engaged in commis- of all The quantity of his work are as remark- sions kinds. range and able as its epoch-making character. LINNEAN CELEBRATIONS SWEDEN Ar the beginning of the eighteenth IN century the military power of Sweden, so long a leading foree in European polities, had been erushed, the people THE PROGRESS OF HERMANN VON HELMHOLTZ AT THE AGE OF SEVENTY. Adolf Hildebrand in 1891. had sunk into apathy broken only by intrigue and disorder, the nation was oi no account. Then the son of a poor country priest, endowed merely with the divine love of nature and of knowl- edge, fought his way through school and university, and by constant obser- vation and diligent study of subjects to which men of the world then paid much attention, neither scholars nor won a place among the great ones of SCIENCH 285 A bust made by the earth. youthful thither science from all Europe, and then sent them Installed at Upsala, the first attracted men of Linneus students and through the whole world as gleaners of further knowledge and ambassadors of his country’s new-found fame. Never since has Sweden relapsed from the high place thus won for her among nations in the wider world of scientific thought. 286 POPULAR SCIENCE MONTHLY MEDAL IN HONOR OF THE BICENTENARY OF THE BIRTH OF LINNZUS, STRUCK BY THE SWEDISH ACADEMY OF SCIENCE. The first copy was awarded Sir Joseph Hooker, who cele- brated his ninetieth birthday on June 30. At the beginning of the twentieth century we have seen Sweden appar- ently losing prestige by the secession of Norway from the union; and, while we have admired the statesmanship that could accommodate itself with dignity to such a severance without the horrors of a brothers’ war, we have seen a people mistrustful of its rulers, fearful of its neighbors, and bitter in its own heart. But in this celebra- tion of the most eminent among her sons we may perceive at least one sign that Sweden is recognizing her true greatness. If she did not fully grasp it before, the homage of the world will have forced on her the truth of the Linnean motto—Famam extendere fac- tis. Deeds, no longer of arms, but of honest labor in the ever-widening field of science. Sweden has received a blow; but the blow has aroused her. She stands up; she throws off the gar- ment of slumber; she takes in her hand with renewed vigor the weapons of the future. Around the shrine of Linneus all classes gathered together, and during those three bright days in a year of rain, as one paced the streets of Upsala and of Stockholm, beyond the celebration of the past, behind the feasts that weleomed spring, one be- held the renascence of a nation. How appropriate were the words of Viktor Rydberg’s beautiful Cantata as they sounded through the cathedral of Upsala during the impressive promo- tion of the doctors! « And yet, if we have fallen down in doubt, And by the way ye mourn and ponder gravely, Lift up the banner! flame it out Once more, and bear it through the desert bravely ! Care not, though ye perceive with piercing eye A thousand suns from heaven's archway show- ering! Care not, though ’neath the scythe of Time de- vouring, Like golden seed the starry harvests lie! All noble thoughts, all love that leads you on, All beauteous dreams, Time never can see wasting; These are a harvest garnered from his tasting, ’ Tis to Eternity that they belong. Advance Mankind! Be blithe, be of good cheer; Since in your breasts ye bear the eternal here!” What deep meaning too may one not see in the beautiful medal issued by the Royal Swedish Academy of Science! Here is the nature that the Swedes love so profoundly: the moun- tains in which are buried vast deposits of ore and fertilizing minerals, the woods and fields still unexhausted of their wealth, the waters with hidden incalculable energy. In their .midst observes and ponders the naturalist THE PROGRESS OF SCIENCE 287 who himself did so much to bring ,a solution of copper nitrate, similarly these natural treasures to the hands| treated in every respect except in its and homes of his countrymen, type of} not having been in contact with ema- the thinkers who to-day are piercing further secrets and unlocking fresh stores. And there, in a clear sky, rises the sun. RADIUM EMANATION AND THE TRANSMUTATION OF THE ELEMENTS Sm Wrrram Ramsay has printed | in Nature, for July 18, a letter, en- titled “ Radium Emanation,’ which is | interviews | the basis of the alleged which have been published in the news- papers. The author states that a full account of his researches will shortly be communicated to the Chemical So- ciety. attention to the fact that with Mr. Soddy he had shown in 1903 that the | spontaneous change of the emanation from radium results in the formation of helium; this observation has been confirmed by others. detected in the gases evolved contin- uously from a solution of thorium nitrate. When the emanation is in contact with and dissolved in water, the inert gas which is produced by its change consists mainly of neon; only a trace of helium could be detected. Sir William now states that when a saturated solution of copper sul- phate is substituted for water, no helium is produced; the main product is argon, possibly containing a trace of neon, for some of the stronger of its lines appeared to be present. The residue, after removal of the copper | from this solution, showed the spectra of sodium and of calcium; lithium line was also observed, but was very faint. This last observation has been made four times, in two cases with copper sulphate, and in two with copper nitrate; all possible precau- tions were taken; and similar residues from lead nitrate and from water gave no indication of the presence of lithium; nor was lithium detected in In his brief statement he calls. Helium was once | the red _ nation. | According to the author these re- | sults appear to indicate the following line of thought: From its inactivity it is probable that radium emanation be- longs to the helium series of elements. During its spontaneous change, it |parts with a _ relatively enormous amount of energy. The direction in _which that energy is expended may be modified by circumstances. If the emanation is alone, or in contact with hydrogen and oxygen gases, a portion is “decomposed” or “ disintegrated” by the energy given off by the rest. The gaseous substance produced is in this case helium. If, however, the distribution of the energy is modified by the presence of water, that portion of the emanation which is “ decom- posed” yields neon; if in presence of copper sulphate, argon. Similarly the copper, acted upon by the emanation, is “degraded ” to the first member of its group, namely, lithium; it is im- possible to prove that sodium or potas- /sium are formed, seeing that they are _ constituents of the glass vessel in which |the solution is contained; but from analogy with the “decomposition- products ” of the emanation, they may also be products of the “ degradation ” of copper. | SCIENTIFIC ITEMS. WE record with regret the deaths of Professor Angelo Heilprin, the eminent naturalist and explorer, professor of paleontology and geology in the Phila- delphia Academy of Natural Sciences and lecturer in physical geography at Yale University; of Dr. William L. Ralph, curator of the Section of Bird’s Eggs, in the U. S. National Museum; of Sir William Henry Broadbent, F.R.S., a leading London physician; _of Dr. August Dupré, F.R.S., chemical _adviser to the explosive department of the Home Office of the British govern- 288 POPULAR ment, and of Dr. Heinrich Kreutz, associate professor of astronomy at Kiel and editor of the Astronomische Nachrichten. THE tercentenary of the death of Ulisse Aldrovandi, the celebrated nat- uralist, was celebrated at Bologna, from June 11 to 13, in the presence of numerous delegates from foreign countries. A memorial tablet was un- veiled, while a medal and several vol- umes compiled for the occasion were presented to the delegates. Tue Norwegian Storting has voted the sum of 40,000 Kroner to Mr. Roald Amundsen in recognition of his services to science in traversing the northwest passage and relocating the magnetic North Pole——Dr. Otto Zach- SCIENCE MONTHLY arias, director of the Biological Sta- tion at Plon, and Dr. C. G. Schillings, the African traveler, have been given the title of professor by the German government.—Professor W. F. M. Goss, dean of the Schools of Engineering and director of the Engineering Labora- tory of Purdue University, has ac- cepted the position of dean of the Col- lege of Engineering in the University of Illinois. THE Royal Society of Medicine, com- posed by a union of medical societies in London, has received a royal char- ter. The society begins with a mem- bership of 4,000 and an income of $40,000. Sir William Church has been elected the first president of the society. THE POPULAR SCIENCE MONTHLY OCTOBER, 1907 A TRIP AROUND ICELAND By L. P. GRATACAP, AMERICAN MUSEUM OF NATURAL HISTORY, HE study of islands, whether the attention of the visitor is directed to their structure or their inhabitants, yields a peculiar pleasure. They are quite definite and unique units. They reveal interesting relations with neighboring continents, of which they so often are merely separated fragments, and they afford texts for suggestive and fascinating speculations as to past geographical conditions. In their life no less than in their mineral features,. they. exhibit to the naturalist, familiar with the interpretation of forms, biological affinities with distant or near-by lands, and thereby shed side-lights, frequently instructive, upon the migrations of plants and animals. And they are, or have been, in themselves experimental stations, where the theories of specific change or specific origin may find partial en- dorsement or helpful refutation. Long before Wallace wrote his “Island Life,” they had attracted observers, and the unity with, or the diversity from, adjoining islands or contiguous mainlands, of their flora and fauna furnished abundant proofs of their ancient separation or their recent union with both. An island, too, has its limits so irrevocably fixed, becomes, from its isolation, such a definite tract, that its study has the economical value of concentration and persistency. And this advantage obviously reaches phenomenal value, the more remote the island is from any other, because then its peculiarities teach the naturalist lessons in the origin of living species, or supply the geologist with new types of ter- restrial architecture. It was long ago pointed out that if we visit the great islands of the globe, we find that they present anomalies in their animal productions, for while some exactly resemble the nearest continents, others are widely different. Thus the quadrupeds, birds and insects of Borneo VOL. LXxI. — 19. 290 POPULAR SCIENCE MONTHLY correspond very closely to those of the Asiatic continent, while those of Mada- gascar are extremely unlike the African forms, although the distance from the continent is less in the latter case than in the former. And if we compare the three great islands, Sumatra, Borneo and Celebes, lying, as it were, side by side, in the same ocean—we find that the former two, although farthest apart, have almost. identical productions, while the latter two, though closer together, are more unlike than Britain and Japan, situated in different oceans and separated by the largest of the great continents (Wallace). These unexpected results warranted the inference that the con- trasted areas, despite their nearness to each other, had, for long periods, been severed, and that those, on the other hand, which were widely sundered had been at some time, in some way, united by intermediate connecting land surfaces. Iceland is an island of most respectable proportions—a little larger than Ireland; it occupies a position on the earth’s surface especially interesting from its arctic relations, it furnishes sensational contrasts by reason of the union, within its limits, of the opposed empires of frost and fire; its plant hfe has European affinities; its insect life is restricted, but also European; its bird hfe has a European expression, but pertains also to the circumpolar distribution of identical birds in both hemispheres; its geological history is recent and startling, and its scenery strange and magnificent. It is, therefore, not sur- prising that it attracts scientific and adventuresome visitors, though it seems to the writer that these would naturally increase if, at least in America, this island received some sort of popular elucidation. Such is the purpose of this article. Besides the especial wonders of its bold and frowning cliffs, its ice-buried mountains and its foaming and tempestuous rivers, Iceland for centuries has been the home of romance. Baring Gould was perhaps the first modern English writer who appreciated and adequately described the bewildering impressions made by Iceland upon a visitor, though he failed to see its most marvelous aspects, and he pays his tribute of praise very well indeed. It was our own Bayard Taylor who, somewhat later, on the pages of the New York Tribune, remarked, not that there is no interest in Iceland itself. On the contrary, une handful of old Seandinavians there preserve for the scholars of our day a philological and historical interest, such as no equal number of men have ever achieved in the annals of the world. A thousand years ago they cut loose from Europe and carried the most virile elements of its past almost out of reach of later changes. But Iceland is so remote from us, in an intellectual as well as a material sense, that any satisfactory knowledge of it requires a special appropriation of time and study. The easier and more common way to Iceland, the one taken by the writer, is by the United Steamship Co.’s steamers (the Danish mail line), which leave Copenhagen, at frequent intervals during the sum- A TRIP AROUND ICELAND 291 mer, stop at Leith, the port of Edinburgh, and then variously steam northward to Thorshayn on the Faroe Islands, and thence to Reykjavik, the capital of Iceland at its southwestern headland, or turn to the eastern coast of Iceland at once, and circuitously, landing at the settle- ments and towns in the fiord valleys, circumnavigate it, finally dis- embarking the traveler at Reykjavik. It was in the latter way that the writer determined to gain some insight into the coastal features of Iceland before he made a short but instructive dash into the interior, from Reykjavik, using for that purpose the indispensable Iceland pony. This is that most con- scientious, affectionate and captivating little beast, whose docility and plability—when knowingly handled—have made him the Icelander’s constant companion, his only available substitute for the trolley and the railroad. The omniscient Cooke has not been unmindful of the prospects of profit from the chance tourist drawn to the fabled shores of Iceland, and has already provided excursion tickets from New York to Iceland with accompanying arrangements for the equipment and conduct of parties into the interior. In this way the soi-disant explorer may most conveniently form his plans for this unusual outing. Less de- pendent and more ambitious men arrange with leading guides at Reykjavik for the despatch of men and horses and provisions to the east coast from Reykjavik. They meet these expeditions at some of the settlements, and traverse the island from east to west, fording the rivers, hunting over the moors, fishing in the lakes and streams, pos- sibly skirting the huge icefields, and reaching Reykjavik in time for the returning steamers in September. A third and most important group of visitors are professional men, who also take out considerable equipment, in which clinometers, barometers, thermometers, hammers and collecting boxes and bags replace the gun and rod. Amongst the latter has been Professor Thorold Thoroddsen, of the University of Copenhagen, who for thirty years has made a laborious inspection of the natural features of Iceland, visiting under circumstances of danger and extreme discomfort, its most inaccessible localities, and Professor K. Keilhack, the German naturalist, whose articles both in geology and in natural history have aided greatly in the scientific. interpretation of this domain of wonders, while Professor Slater, of the British Museum, has only recently contributed, in his admirable account of the birds of Iceland, the garnered results of his travel and observation to the growing library of Icelandica. In this connection I should mention the capital “ Flora Icelandica,” of Stefan Stefansson, which has recently appeared, and wherein the botany of Iceland receives an extended and systematic treatment. The approach to Iceland was made in an impervious and haunting 292 POPULAR SCIENCE MONTHLY fog which later became confounded with, and imperfectly dissipated by, torrents of rain. It was a disappointing reception, and all the more vexatious because at Faskrudsfiord, the first stopping-place, occasional raisings of the curtain gave spectral glimpses of vast snowy peaks accumulated in unseen grandeur behind the rolling folds of the mist. It was in a measure a compensation for their obscuration that plentiful showers seamed the steep canon walls of the inlet with plunging silver cataracts. These developed with instantaneous rapidity, leaping down over the basaltic cliffs in innumerable threads. A word descriptive of the physical configuration of Iceland will make more clear the outline and incidents of the trip about the island. Iceland has in general a subelliptical shape with its longer axis lying northeast and southwest. This approximate form is extended into a sort of lateral excrescence or finger-formed expansion at the northwest margin, in a deeply dissected peninsula, which lies between the Breitfiord and the bay of Hunafloi (see map). The island is fringed on its eastern, northern and western shores by a continuous succession of inlets, bays, fiord-like arms, which often subdivide and branch at their heads into smaller crevices and com- municate with lowlands or valleys leading back into the hills and the interior. The southern shore offers a considerable contrast to this fimbriation of its other coasts, and while it is assumed by 'Thoroddsen that the southern shore was at one time indented by similar inlets, to-day it presents an entire outline which represents broad margins of sand, flows of mud and detrital deposits, scored by glacial streams, and punctuated by lakes or lagoons, in other words, a fiorded area blocked and filled up by later blankets, and upthrown banks and plugs of sand from the sea, or by the fluviatile washings from the higher country, and the past deluges of sediments from the melting glaciers. The trip about the island is made up of entrances into these fiords, and of skirting the coast, which presents a series of superb pictures, while the occasional stops permit transient glimpses of the life and industry of the people. Our company, on the staunch little craft Vesta, conducted on its devious ways by the bluff and able seaman, Captain Braun, was one of diversified elements and entertaining con- trasts. ) = ° i 2 THE PROGRESS OF SCIENCE 475 THE PROGRESS OF SCIENCE MORTALITY STATISTICS Tue Bureau of the Census has just issued its annual report on mortality statistics for the year 1905. There is surely nothing more dramatic than tables of death rates, however uninter- esting they may appear to the casual observer. Thus the death rate in In- diana and in Michigan is scarcely above 13 a thousand, whereas in European Russia it is 33. If the population of European Russia is assumed to be 130 million, this means that of the 4,290.- 000 people who die annually in that country 2,600,000 would not die if the conditions were as favorable as they are in Indiana and Michigan. There is no reason to suppose that the Rus- sians are naturally less vigorous than those living in our central states, and this great loss of life—besides which the number of those killed in the Rus- sian-Japanese war is_ insignificant— must be due to conditions of life which could be remedied. It is probable that in the cases of the states quoted, and in some parts of Great Britain, Nor- way and Sweden where the rate is equally low, it is still very much high- er than it should be. We may hope that the publication of the death rates may itself have a tendency to call at- tention to the enormous annua! sacri- fice of life, and it is consequently for- tunate that the Bureau of the Census is now able to publish annually a vol- ume of statistics and that the area covered by the statistics tends to in- crease. In 1890 the states in which registra- tion was effective had a population of about twenty million, and in addition there were registration cities having a population of about ten million. In the year 1906 the states of California, Colorado, Maryland, Pennsylvania and South Dakota were added to those which maintain effective registration. The population now included in the registration area is over thirty-six mil- lion, or nearly half the total popula- tion. Indiana and Michigan have the low- est death rates among the registration states; the death rates being, respect- ively, 15.3 and 14.7 in their cities, and 12.7 and 12.8 in their rural districts. In New York City the death rate was 19.4 as the average of the five years from 1900 to 1904. The cities having the lowest death rates were St. Joseph, Mo., St. Paul, Minn., and Minneapolis, Minn., where rates, respectively, of 7.6, 10 and 10.6 are assigned. Charleston, S. C., has the highest death rate—31.3 —but here, as in other southern states with abnormally high death rates, the incidence is on the negro population. The death rate at Charleston, for ex- ample, is 22.9 for whites and 44.3 for negroes. Tuberculosis of the lungs is still by far the most fatal of all diseases, caus- ing 172 deaths each year for each hun- dred thousand of the population. It is followed by pneumonia with 135, heart disease with 121, diarrhea with 113, and nephritis and Bright’s disease with 94. There is a tendency for dis- eases such as apoplexy and cancer, which affect mainly elderly persons, to increase, and this is of course a grati- fying indication that the relative num- ber of those living beyond middle age is increasing. Contagious diseases nat- urally show large fluctuations, but searlet fever appears to have decidedly decreased, the number of deaths per thousand having fallen from 12 to 7. We reproduce diagrams originally 476 1811 1821 1831 1841 MARK. O opts POPULAR SCIENCE MONTHLY 1851 1861 1871 1881 AVERAGE ANNUAL BIRTH RATES OF CERTAIN EUROPEAN COUNTRIES PER 1,000 OF POPULATION, BY DECADES (STILLBIRTHS EXCLUDED). prepared under the auspices of the | French government showing graphic- ally the number of births and deaths per thousand of pop- .ulation in those countries which pub- lish adequate statistics. It will be noted that in all parts of the civilized the birth and the death rates tend to decrease, and that, average annual world both rates as a rule, those countries having the lowest death rates have also the lowest As is well known, the low- est birth rate is that of the French— 22.2 during the decade 1891 to 1900 This is followed very birth rates. and still falling. closely by the figures for Ireland—23. There is then a break to Sweden and Switzerland, with birth rates, respect- ively, of 27.2 and 28.1. The highest birth rates recorded are in Servia and Roumania. Germany has a birth rate of 36.1; England and Wales of 29.9. During the last twenty years the birth rate has fallen in every country and the death rate has also fallen in prac- The lowest death rates, 16.1 and 16.3, respectively, are tically all countries. in Sweden and Norway. The highest, 33.4 and 30, respectively, are in Russia and Spain. It should be remembered that the birth rate and the death rate have THE PROGRESS OF 1801 To 1811 1821 1831 SCIENCE 477 1851 1861 1871 1881 1891 To TO To TO To 860 1S AVERAGE ANNUAL DEATH RATES OF CERTAIN EUROPEAN COUNTRIES PER 1,000 OF POPULATION, BY DECADES (STILLBIRTHS EXCLUDED). probably decreased even more rapidly | the admission of the officers of state than the statistics show, as births and deaths, a rule, tend to more accurately recorded now than formerly. Thus it is by no means certain that the birth rate in England increased from the period 1841-50 to 1871-80. Even now when an infant dies at an early age, the registration of both birth and death is sometimes not recorded, and this custom was doubtless formerly more prevalent than it is at present. as be THE GROWTH OF THE UNIVERSITIES STATE THE first bulletin of the Carnegie | Foundation, which is concerned with | universities to retiring allowances, con- tains a good deal of interesting in- formation in regard to the growth of these institutions, part of which is summarized in the accompanying table. The first column gives the date of founding, and some may be surprised to find that the first state universities were. established in the south, Mich- igan, often looked upon as the oldest state university, being in fact the tenth in order. Another circumstance per- haps not generally known is the fact that two state universities were estab- lished in Ohio at the early dates of 1804 and 1824, and that the Ohio State POPULAR SCIENCE MONTHLY 478 66 000‘0F 000‘02LT OIL‘Le GamonetonossconGe 00°08 00°0L 981 OL ; al FI FO6L [ccceecces cvsctsvencesees eplo[y ial auo Ny OLL ‘898 000'26 000°%S 00°0L 00°OL | 68% | GFT &% Gis i/Q0e0 dite ae. 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Seen, Serre oraty ‘sydreooyy jenuuy ‘MOTT jeHAUy. pee | Bh | qe Er | THE PROGRESS OF University at Columbus was not estab- lished until 1870. The University of Florida, established in 1904, makes the number of state universities thirty- nine, and, as there are three in Ohio, the number of states and territories having state universities is thirty- seven. Nearly all the universities of the eastern states have at one time or an- other received appropriations from the state and have been to a certain extent under state control, and at present certain universities, such as Pennsyl- vania and Cornell, may be regarded as partly state institutions. the governor of the state is a member of the board of trustees and appropria- tions are made by the state for the support of the university. The next column of the table gives the numbers of instructors and stu- dents, according to which the Univer- | sity of New Mexico, with 89 students and nineteen instructors, is the small- est of the institutions, while the largest are Wisconsin, with 3,571 students and 317 instructors; Minnesota, with 3,955 | students and 317 instructors; Illinois, tors; and 332 instructors, and California, with 4,173 students and 403 instruc- tors. According to the figures annu- ally compiled by Professor Tombo and published in Science, the five largest universities which are independent of the state are Harvard, with 5,343 stu- dents and 583 instructors; Chicago, with 4,731 students and 341 instruc- tors; Columbia, with 4,650 students and 600 instructors; Cornell, with 4,075 students and 525 instructors; and Pennsylvania, with 3,934 students and 375 instructors. It will thus be seen that the leading corporations do not differ greatly in size. The table next gives the annual tui- | tion fees, whence it appears that Indi- ana, Arkansas, Nevada and Oklahoma charge no fees, while in a number of other states the fees are nominal. In each case | SCIENCE 479 eral of the universities charge higher fees to non-residents than to residents of the state. Perhaps the most inter- esting data on the table are the com- parisons of the annual income apart | from tuition fees of these universities in 1896 and 1906. There is here an increase that holds for every institu- tion without exception and which is certainly most remarkable. Thus the annual income of the ten principle uni- versities of the middle west was in 1896 $1,689,200, whereas ten years later it was $4,577,700. The figures given in the table are, however, some- what obscured by the fact that there is no distinction made between appro- priations for current income and for new buildings. The two following col- umns give the approximate total ap- propriations from the state and gifts from private sources, showing clearly how largely state universities are de- pendent on the public for support. Thus Illinois, which has received $6,- 000,000 from the state, has only re- ceived $25,000 by private gift. Some of the universities, as Michigan and | California, have, however, received con- with 4,074 students and 408 instruc- | Michigan, with 4,136 students | siderable gifts. In his report President Pritchett urges that the universities must depend either on public appro- priations or on private gifts, and this point of view is on the whole supported | by these figures and by conditions in Sev- | | foreign The however, are not necessarily final. conditions, In New York City, for example, there are countries. admirable museums of natural history and of the fine arts and botanical and zoological gardens which are supported almost equally by the city and by pri- vate gifts. SCIENTIFIC ITEMS We regret to record the deaths of Major James Carroll, U. 8. A., known for his researches on yellow fever, and of Professor W. O. of Wes- leyan University, known for his re- Atwater, searches on nutrition. 480 POPULAR An institution for the suppression of tuberculosis is planned in Germany in honor of the twenty-fifth anniversary of the discovery of tuberculosis by Professor Robert Koch. Appeal is made for contributions sufficient to make the institution a tribute of grati- tude to Koch, similar to those with which the name of Pasteur has been honored in France and that of Lister in England—A “Morley Chemical Laboratory,” named in honor of Dr. Edward W. Morley, emeritus professor SCIENCE MONTHLY of chemistry, will be built at Western Reserve University during the present year. Proressor A. N. SKINNER, of the U. S. Naval Observatory, has retired on reaching the age limit of 62 years. —Dr. Ellwood Mead, chief of irriga- tion investigation of the U. 8. Depart- ment of Agriculture and professor of irrigation in the University of Cali- fornia, has accepted the office of chief of irrigation investigations for Aus- tralia. JS sb aab Peewee 5 Cl Ne MEO INA ERE: ¥ DECEMBER, 1907 NOTES ON ASIATIC MUSEUMS By PROFESSOR BASHFORD DEAN COLUMBIA UNIVERSITY SIA, whatever its contributions to art and science, has, humanely speaking, taught little to the west as to either the means of form- ing its illustrative collections or the manner of displaying them; in fact, as far as I am aware, the trend of Asiatic culture has been rather to deter its people from collecting. For such an interest, to pure eastern ideals, would foster. the heresy that the things of this world are to be the more highly prized: or, in another direction, it might suggest unde- sirable ostentation. It is from the latter point of view, in fact, that a Japanese collector will still decline to exhibit his treasures outside of the circle of his intimate friends. In any event, whatever be the rea- sons, I think it may safely be said that comprehensive collections were early unknown in the east. In India, land of fabulous riches, the pre- European collections appear to have been confined to the cabinets of rulers and the wealthiest civilians, and were made up largely of deco- rated objects, ivories, jewels, arms, now and then menageries—the last sometimes including exotic animals. Such collections were usually little more than a gathering of valuable heirlooms, objects obtained . during travels, and curiosities generally.1 And similar conditions pre- vailed, as far as I was able to find, in China. In Japan, small collec- tions were, and are, very numerous. Professor Morse, knowing his theme more accurately than Huish, describes the Japanese as a nation of collectors; but such collections, as I think all will agree, are notable for their quality rather than their comprehensiveness, and are formed in the 1T recall, as a typical specimen in such an early collection a copy in ivory of a human skeleton which a rajah (of Tanjore) had caused to be prepared in Paris—for a genuine one could not, according to the rules of caste, be used in his anatomical inquiries. 482 POPULAR SCIENCE MONTHLY strictest sense for private use. In Japan, as elsewhere in Asia prior to the invasion of European methods, there was not, I believe, a single public musewm, unless indeed we regard as museums the storehouses of temples. These, however, contained little more than the reserve stock from which objects for temple service or decoration were chosen. The earhest Asiatic museum appears to have been established in the Moluccas, about half a century after their definite settlement by the Dutch, and in the classic work? of Georgius Everhardus Rumphius, written at the close of the seventeenth century, we have a record of the number and variety of objects which had been gathered together by this enterprising collector in the room of curiosities in Amboyna (Amboin- sche Rariteitkamer). It is evident that this collection was well repre- sented in mollusks, crustaceans and echinoderms. It contained a number of minerals and a small collection of fossils, the latter representing many groups. The descriptive catalogue of Rumphius, it may be mentioned, is well known to naturalists as containing the first account of the soft parts of the chambered nautilus, accompanied, too, by a figure which for a century and a half proved the most accurate in existence. Few details appear as to the organization of this pioneer Asiatic museum. Its founder was a well-to-do merchant in Amboyna, and it was prob- ably installed in one of his warehouses. As far as I am aware, there is no proof that it was formally opened, in the sense of a modern museum, but by analogy of contemporary collections it is probable that the curi- osity room of Amboyna was as freely open to visitors as the similar collections in London, Dresden or Paris. In India the modern public museum found its definite foothold at the time of the extension of British rule. At the end of the eighteenth century, there were already active collectors among the officials of the East India Company, but in general the material then collected, whether ethnological, plant or animal, found its way into Europe. In the work of Linneus, for example, we find record of many Indian species which had been sent him by European collectors. It was by such early workers in various Indian cities that societies were formed which became of considerable importance toward the middle of the nineteenth century. And it is to these local societies that the origin of many of the recent museums is due. In the present paper it is not my plan to refer even in outline to all museums of Asia. Those of Japan are so important that they might conveniently be reserved for a separate paper. The Dutch mu- seums, moreover, I have not had an opportunity of visiting, nor yet those on the continent in the Malayan states. When in Calcutta, I * Amsterdam, Francois Halma, 1705. Part of the collection, as Mr. C. Davies Sherborn has kindly ascertained for me, was later sent to Europe and sold, 1682, to Cosmo de Medici III. It was subsequently transferred to Austria as part of the Medicean inheritance. NOTES ON ASIATIC MUSEUMS 483 was told by Dr. Annandale of the interesting museum at Kuala Lumpur in Selangor, the federal capital of the Malayan states, which promises toa be most complete. A building is here in process of construc- tion, which will make this museum twice the size, for example, of the well-known museum at Colombo. Its present curator is the orni- thologist, Mr. H. C. Robinson, formerly of Liverpool. I learned also of the museum at Thai Ping, capital of Perak, which contains a remark- able ethnological cabinet and an extensive collection of Malayan rep- tiles.. This museum, under the direction of Mr. Leonard Wray, is, I was told, one of the most interesting in Asia. The museum at Bankok, on the other hand, is less important, in spite of the apparently more favorable conditions under which it has grown up. And its arrange- ment leaves much to be desired. Of the museums in the Dutch East Indies, that at Batavia is easily the first, containing extensive local collections, both ethnological and faunistic. A second museum, at Trevandrum on the west coast of Java, has received the favorable comment of experts. Its collection of whales is especially complete. The museums in China may be dismissed with but few words. In the Chinese treaty-ports there is little interest in museum matters on the part of resident Europeans, whose ways are commercial, and under existing conditions the Chinese authorities can hardly be expected to grant funds for such purposes. The best Chinese museum is the one at Hong Kong. It has a separate building with well-lighted galleries, and exhibits a fairly extensive series of natural history and ethnological objects, coins, etc. It is clear, however, that its resources are very restricted, and such a museum, whatever its effect upon the oriental visitor, is apt to be uninspiring. In Peking, however, in con- nection with the Imperial University of China, an important museum will soon be opened; it may be mentioned that this branch of the gov- ernmental educational work has been largely directed by the Japanese. The museums of the following cities may be given a more detailed report, viz., Singapore, Colombo, Madras, Calcutta, Lahore and Jaipur. The museum in Bombay is said to be uninteresting, and I neglected to visit it. SINGAPORE The museum at Singapore, known as the “ Raffles Museum,” had its origin (1844) as a proprietary library in which local curiosities came to be preserved. In 1874 the institution was taken over by the British government (Straits Settlements), and in 1887 the present building was provided to house a collection acquired at the time of the Victorian Jubilee. The building is well proportioned, suitably lighted and planned, Fig. 1, but too small for its needs, and the authorities are now constructing an addition. This will be of the same size as the 484 POPULAR SCIENCE MONTHLY pat a = Ss 4 Si 2 Fic. 1. SINGAPORE. ‘}HE RAFFLES MUSEUM AND LIBRARY. earlier building, and is to be connected with it by a wide gallery pass- ing from behind the main staircase. Each building measures about 250 feet long by 50 feet wide; the cost of both buildings amounts to about $100,000. Building, it will be seen, is distinctly less expensive than in the Occident ! The site of the museum is in a small city park. Entering the building from the town side, one passes into a spacous rotunda well filled with cases, and giving one the preliminary color of the local fauna. Prominent, for example, is a tiger fairly wel mounted, and with a jungly background. This huge creature had been, I was told, the household pet of a local Rajah. One may mention, incidentally, that the tiger is decidedly on the increase in the Malay Peninsula, indeed even in the immediate neighborhood of Singapore. The col- lection of insects in the museum is important. In the rotunda is a series of native beetles and orthopters, including among the former, wonderful longicorns and Scarabeeids; and, among the orthopters, the best examples I have seen of leaf insects and walkingsticks. At one side of the rotunda is the entrance of the Raffles library (now grown to 30,000 volumes), which is devoted largely to works dealing with local natural history and ethnology. At the back of the rotunda, one ascends the stairs and enters the natural-history gallery and the ethnological rooms. Among noteworthy exhibits I recall the collection of local butterflies and moths, and a series, possibly the best extant, of paradise birds. The reptiles include turtles, crocodiles, and a great number of local snakes. The cases containing the gibbon and NOTES ON ASIATIC MUSEUMS 485 ourang would, I am sure, be cordially envied by the best western museums, even though the mounting is not quite up to the present standard. I recall particularly one male ourang with a splendid head, and of extraordinary size. Among the zoological rarities are the relics of a very young dugong. This had been brought to the museum living and the preparations are accompanied by sketches of the living animal. In invertebrate material there is the usual range of crustacea, corals and sponges, most of them carefully determined. The ethnological cabinet (Malayan) is important, as one might expect, and its arrange- ment is well carried out. There are models of houses, some with inao suspended about them, suggesting primitive Japanese buildings, even with the curious “ frog-thigh beams ” crossing at the ridge pole, as in the most primitive Shinto temples, and with these are many sug- gestions of relationship with Japan. Of Dyak objects there are rich gatherings, including a collection of krisses, costumes, ornaments, etc. There are a number of the sharply-perforated carvings still used to decorate Urala ceremonial feasts, groups of objects used in marriage ceremonies, collections illustrating local basket-making, an art in which the Malayans are especially skillful. There are.also cases of native cloths, coins and ornaments of gold and silver, the latter not as good in quality as one might reasonably expect. In the artistic treatment of many of these objects there are obvious affinities with the South Seas. Much of the success of the present museum has been due to the labors during the past dozen years of the director, Dr. R. Hanitsch, whose picture, as he stands in front ot his bungalow, near Hine he Fic. 2. SINGAPORE. BUNGALOW OF THE MusrEUM-DIRECTOR, Dr. HANITSCH. 486 POPULAR SCIENCE MONTHLY the museum garden, is shown in Fig. 2. Dr. Hanitsch is a graduate of the University of Jena, and was for many years demonstrator in zoology in the University College of Liverpool. The former director was the well-known ornithologist, Mr. W. Davidson. CoLOMBO This museum, oldest in its building (1877) and in some regards best of Asiatic museums, was built on the outskirts of the city in the middle of the old cinnamon gardens. It is especially important to the general visitor as giving him the only practicable glimpse of the antiq- uities of Ceylon. It stands back from the red road, its buff-colored and long two-storied facade appearing prominently against a setting of tropical trees. On the ground floor are arranged the antiquities: in one room are objects in precious metals and stones, arm-rings, neck- laces, utensils, caskets, sword handles;.and near by are figures dressed in Cingalese finery of early times; on another side is a library con- taining Ceylonica, and a mass of the ruler-shaped books with palm- leaf pages scratched with Sanscrit ; on still another side, in an imposing gallery, is a collection of architectural and decorative objects in wood and stone, including the colossal lion brought from Pollonarna, on whose back the native kings sat when they administered justice. Here also is the beautiful window from the ruin of Yapahoo, and a huge portrait statue of a twelfth-century king. On the walls of the main staircase are copies of the frescoes of the caverns of Sigiri. The collec- tion of antiquities extends even into the garden, whcre several o* the larger statues and a shrine are exhibited. The upper story of the museum is devoted to natural history, and here the distinguished director, Dr. Arthur Willey, has arranged groups of animals to give the visitor an adequate picture of the wild life of Ceylon. Alcoholic and dried specimens are well displayed and labeled, and even living speci- mens are interspersed, as in a case containing leaf-resembling insects. Dr. Willey has taken greatly to heart the need of exhibiting hving creatures in the interest of his museum and, in the garden adjoining his office, he thas arranged a small menagerie, which has proved a great attraction no less to foreign visitors than to natives. Nor does Dr. Willey escape his living charges even when he goes to his bungalow, for there I saw a fine series of the rare lemur, Loris, as well also as a specimen of [chthyophis glutinosa, the earthworm-Like amphibian whose development was studied by the Sarazins. No one should leave Ceylon before paying a visit to the renowned botanical gardens, with a small museum, at Peradeniya; for it is but seventy miles from Colombo and at a delightful altitude (1,500 feet). For here within a small area one may see, with a minimum of discom- fort, the rarest and most striking tropical plants, from minute orchids NOTES ON ASIATIC MUSEUMS 487 to banyan trees: and one wanders about as in a land of enchantment, amid traveler’s palms, which will spout water if one punctures a stalk, breadfruit, cocoanuts, nutmegs, cinnamon, deadly upas trees, Bauhinia racemosa, with‘its cable-like stems, and the telegraph-plant, Desmodium gyrans, automatically lifting and dropping its leaves. Incidentally, too, there are zoological interests. Not uncommon are trees infested with flying foxes: and in the neighborhood the traveler to the east may see his first elephant working in the fields, but willing to show his paces for a few pice; so too one might happen to make the acquaint- ance of land-leeches, which find their way unpleasantly through the 3. 8. COLOMBO. CITY MUSEtM, But as an offset to this he may see a wild rr. Or he may discover a cobra and induce it Mapras dras is in many regards a quite modern in- are new and spacious, built of dark brick and icenic style, Fig. 4. Its collections illustrate uistory, archeology and art of southern India. ) is the important Connemara library, rich in history of Madras. The natural-history section seum, part of its collection dating from 1846, nterest of including within its animal galleries mens. ‘The archeological section is rich in pre- lly pottery: it contains, however, many objects enteenth centuries, arms, armor and cannon, of s well as of native wars. Among other curious “ONIGTING WAASNIY sage HO : “‘SYUCVIV pol NOTES ON ASIATIC MUSEUMS MADRAS. VIEW IN ONE OF THE NATURAL HISTORY GALLERIES. Fic. 6. MADRAS. GALLERY OF METAL WORK. 490 POPULAR SCIENCE MONTHLY relics is a large swinging-post terminating in an elephant head, probably unique, which in a remote village was used up to relatively recent times for human sacrifices. The art objects are represented in great variety and are attractively exhibited, textiles, pottery, wood and metal work, musical instruments, drawings. One recalls especially the suite of pictured. cotton curtains for which Madras has long been noted; also the beautiful repoussé work in precious metals (Fig. 6). The museum is distinctly one of the most successful in India. Its director is the zoologist, Dr. Edgar Thurston. CALCUTTA The museum of Calcutta is far and away the most imposing of Asiatic museums, representing, as it does, the government of India in the imperial capital. Its buildings, Fig. 7, are the most extensive and its collections the most important. In this region, moreover, it is the oldest, for it preserves the collections of the Asiatic Society of Bengal, founded in 1784. The success of the museum, it may be remarked, has been due in no small degree to its tradition of selecting directors eminent both as scientists and as executives. It was to Mr. Bly, anearly curator of the Asiatic society (1842 to 1862), a voluminous correspondent of Darwin, by the way, that the credit belongs for securing governmental assistance in erecting the museum’s first building. His successor was John Anderson, who remained in charge until 1886. And his, in turn, was Dr. Wood Mason, 1886 to 1893. And from that time to the present, the director has been Major A. Alcock, widely known for his researches on the deep-sea fauna of the Pay of Bengal. Fig. 7. CaLtcutta. THE INDIAN Museum. Front view. From Chowringhee. NOTES ON ASIATIC MUSEUMS 4y1 Fie. 8. CALcuTTaA. HALL OF INDIAN MAMMALS. At the time of the opening of the new museum (about 1890) the collections of the Asiatic Society were transferred to the British govern- ment. They comprised principally three classes of objects, zoological, ethnological and archeological, the last of unique importance. They include the antiquities secured by Colonel Mackenzie from the Amra- vati tope (1796 and 1816), and the collections of the Tytlers, Kittoe and General Cunningham. The last named investigator, one of the founders of the museum, secured for it also the objects from the Bharhut stupa. The entire collection thus contains in large measure the figured speci- mens in Indian archeology and it is especially rich in the finds from the neighborhood of Lucknow, Nagpore, Benares and Delhi. The ethno- logical cabinet is based upon the collection of Roer, whose catalogue dates from 1843. By 1882 no less than 600 crania were listed. The zoological division of the museum is based upon the Blyth collection of the Asiatic Society. As early as 1862 there were represented 600 species of mammals, 2,000 species of birds, 300 of reptiles, and 1,000 of mollusks; and since this time the zoological collection has increased vastly. Figs. 8, 9, 10. The Calcutta museum expanded notably about two decades ago, when it incorporated two allied institutions. The first of these was the economic museum of the government of Bengal (added in 1887), whose collections are arranged in separate galleries, and the second, the collections of the geological survey, these added (about 1890) when the public museum was opened. ‘The subsidy for the latter institutions, it may be mentioned, is separate from that of the main museum, about 40,000 rupees a year being granted by the government for their annual support. And a similar appropriation is made for the remainder of the museum. 492 POPULAR SCIENCE MONTHLY Under the present director the work of the museum has made notable advances. During the past twelve years over 100,000 speci- mens have been entered in the books of the museum and the new material has been extensively studied. Especially through the cruises of the Investigator carried out under Major Alcock’s direction (Major Alcock came to India as surgeon-naturalist (1888-1892) to examine the sea-barriers of India), a wealth of marine material has been placed in the hands of special- ists throughout the world. And the museum had already published many memoirs upon it—twenty- five, or thereabouts. It might be mentioned, as a sad commentary upon the relation of politics and science in India, that the well-known gallery of fishes arranged by the director, after years of labor, has recently been demolished by order of the Viceroy, Lord Curzon, who could find in Caleutta no other gallery in which to house a collection of relics of the Sepoy rebellion ! Fig. 9. CALCUTTA. PORTION OF THE BIRD HALL. The invertebrate collections of the museum are extensive and well displayed. Particularly interesting is the entomological cabinet which includes the de Nicéville lepidoptera and the Dugeon hymenoptera, the latter comprising about 1,000 type specimens. The entomological sur- vey undertaken by the museum is its last development, establishing in 1903 the first entomological laboratory in India, in connection with a commission of forestry. Equally important are the geological ma- terials exhibited in the museum. Of meteors, no less than 400 falls are represented. Of ores there are many varieties, especially in man- ganese. In fossils there is valu- able Cretaceous material, inclu- ding the types of Blanford ; among late acquisitions there is a wonder- ful specimen of Hlephas antiquus (namadicus). The fossil mam- mals from the Sewalik Hills near Simla are also preserved in the Fre. 10. CALCUTTA. A CASEIN THE REPTILE GALLERY. NOTES ON ASIATIC MUSEUMS 493 gallery of paleontology, but they fail to impress a visitor who has seen the associated remains of late Tertiary mammals in other museums. LAHORE The museum at Lahore is known to most foreigners as the “ wonder- house” of Kipling, and in front of its door stands the ancient cannon with its memories of Kim and his lama. Although intended to rep- resent the natural sciences as well as the arts, this museum need hardly be referred to in the former regard, for its specimens are few and poorly displayed. In its materials for the study of art, however, it ranks among the foremost in the east. Its predecessor was a school of arts, founded as a memorial to the Viceroy, Lord Mayo, and carried out during the early seventies, under its first principal and curator, Mr. J. Lockwood Kipling (1875-92). The development of the pres- ent museum then came about as a result of the Victorian jubilee. A general subscription secured the necessary funds, and the corner-stone of the present building (Fig. 11) was laid by Prince Victor in Feb- ruary, 1890, and its collections were opened to the public two years later. The design was furnished by Mr. Lockwood Kipling in coop- eration with the Indian architect Bryam Singh. As in the majority of the Indian museums, the native style has been as closely followed as museum needs would permit, and the tall galleries and massive doorways (Fig. 14) leave pleasant impressions in the Fic. 11. LAHORE. THE MUSEUM, THE HALL OF GR#&CO- BACTRIAN SCULPTURE. Fic. 12. LAHORE. POPULAR SCIENCE MONTHLY visitor’s mind. The exhibit space includes about 28,000 square feet and the galleries are 45 feet high. As already noted, the museum is interesting in its art exhibits, espe- cially in its Greeco-Bactrian sculp- tures, for these, as is well known, played a most important part in the early art of northern India. This collection, occupying a special gallery 100 feet in length (Figs. 12 and 13), was brought together in the northwest provinces during the early seventies, and is unique. ‘To be mentioned also are the collec- tions of carved wood, musical in- struments, Hindu portraits, inclu- ding a series of the Singh, Hindu drawings, many Afghan documents, and technical exhibits decidedly modern in museum technique, illus- trating, for example, the arts of the Punjaub, glass making, lac turning, leather work, ete. In connection with these there are models of local industries cleverly carried out in terra-cotta by native artists. One may mention also a remarkable series of Madras curtains elaborately stamped with religious ceremonies and personages. The present ad- ministration of the art school and museum is in the hands of Mr. Percy Brown, artist and archeolo- gist, well known for his studies on Greco-Bactrian art. The museum is now affiliated with the Asiatic Society of Bengal, with the Geolog- ical Survey of India and with the Forestry Commission. As an echo of Indian social hears that the museum has been conditions one opened one day a month for Hindu women, women attendants then taking charge of the galleries. The museum is popular, and the attend- ance averages over 1,000 a day. DETAIL IN HALL OF LAHORE. SCULPTURE. Fig. 13. NOTES ON ASIATIC MUSEUMS Fig. 14. LAHORE. THE HALL OF NATIVE ARTS. Fic. 15 JAIpuR. HALL OF METAL WORK. 495 ‘WONASOY AHL ‘wOdIve ‘OT ‘DIA NOTES ON ASIATIC MUSEUMS 497 JAIPUR Jaipur may be mentioned, finally, as furnishing the best type of a museum supported by a native prince—in the present case by the reigning maharajah, Sir Sawdi Madho Singh. It is an imposing monument to this ruler’s modernness, and it has already borne inter- esting fruit in developing and bettering the many art-industries of Jaipur. The building is by no means a small one—at least two hundred feet in length. It stands in the public gardens, an elaborate structure in Indo-Saracenic style, with shaded balconies and corridors, and with numerous courtyards cooled by plants and fountains, Fig. 16. Its scientific collection is small, limited to models and specimens of minor interest. But in modern and semi-modern art objects, in metal, stone, wood or textile, the present museum is, I believe, unsurpassed. Espe- cially beautiful are the examples of metal work, Fig. 15, many of which are the family treasures of the maharajah—gun-metal and silver bidri work, damaskeens from Kashmir, silver repoussé from Trichin- opoly and Ceylon, articulated objects in silver from Bengal, silver figures from Mathura, enamels in gold from Jaipur, in silver from Multan, brasses numberless, and a bewildering series of jewelry from all parts of India. Nowhere can one receive a more illuminating impression of the decorative possibilities in native art. An excellent reference, by the way, is the beautifully illustrated handbook of the museum prepared by its honorary secretary, Colonel Hendley (1895). VOL. LXXI.—32. 498 POPULAR SCIENCE MONTHLY THE PLACE OF LINNAIUS IN THE HISTORY OF SCIENCE? By PrRoFEssoR ARTHUR O. LOVEJOY WASHINGTON UNIVERSITY, ST. LOUIS (ice recent celebrations of the bicentenary of Linneus’s birth had one sort of appropriateness in somewhat higher degree than is usual in such commemorations: they helped pay the debt of posterity to one of the great figures of the history of science in the currency that he had especially valued. For Linnzus had very markedly the last infirmity of noble mind. Famam extendere factis was his chosen device, which he often prints, with a pride justified only by the event, upon the title-pages of his books; and his biographers are at one in emphasizing the intensity of his desire for fame. It was, indeed, the solid and enduring fame of the productive scholar that he sought, not the applause of the groundlings; his ambition was to link his name to some lasting and imposing part of the ever-enlarging fabric of organized knowledge, and thereby to take rank among the acknowl- edged masters of those who know. That this ambition, large as it was, has been more than fulfilled, is sufficiently evidenced by the world- wide commemoration of this anniversary of his birth—even in cities of the western continent which were themselves non-existent when he came into the world. No naturalist of his century, and few natural- ists of any period, have so universal a popular reputation, or are, by so nearly common consent, given a place among the immortals not far removed from Copernicus, Galileo, Descartes, Leibniz and Newton—to mention only his predecessors. Yet, when seriously scrutinized, Lin- neeus’s position in the history of science is a peculiar one. With his name there is commonly associated no epoch-making hypothesis, not a single important discovery, not one fundamental law or generalization, in any branch of science. The forty years of his active life constitute a period prolific in fruitful hypotheses and signalized by the original enunciation of a number of valid generalizations of the first order of importance ; of none of these was he the author. To go no farther than the biological sciences which Linneus professed: Before 1750, Dau- benton and Buffon had begun to establish the new science of com- parative anatomy and were making known the striking homologies which run through the structure of all species of vertebrates; between * Revision of a paper read before the Academy of Science of St. Louis at its celebration of the two hundredth anniversary of the birth of Linneus. LINNAUS 499 1745 and 1751 Maupertuis had promulgated, and defended with effect- ive arguments, the theory of the transformation of species; in phys- iology, the significant fact of the independent irritability of muscle was discovered by Haller in 1757; in embryology, the doctrine of epigenesis was revived and finally established by Caspar Friedrich Wolff in 1759. As for the science of botany, the foundations had been laid, and the general outlines and principles which were to continue to rule during Linnzus’s time had been established by the end of the preceding cen- tury. The founder of modern scientific botany is Cesalpino (1583). In microscopic plant anatomy and histology, the investigations and de- scriptions which were to underlie the science for something like a century had been made before Linneus’s birth by Grew, Malpighi, Leeuwenhoek. In plant physiology, the réle of the sap had been studied by Malpighi, and the fundamental facts made clear by Hales in his “ Vegetable Staticks,’” 1727; the function of pollen in the fecundation of seeds had been shown by Camerarius before the end of the seventeenth century ; the existence of the sexual distinction in plants had been insisted upon by a long succession of botanists, English, German, Italian and French; and during Linneus’s lifetime the physiological réle of leaves was being made clear (so far as the condition of chemistry at the time permitted) by the philosopher Christian Wolff? and by Bonnet.® Not only is all this true, but it is also a fact that Linneus has been not absolutely unfairly represented, by one of the historians of modern science, as an obstacle to the scientific progress of his time. President White, in his “ Warfare of Science and Theology,” after speaking of certain anticipations of nineteenth century conceptions by DeMaillet, Robinet and Bonnet, remarks: In the second half of the eighteenth century a great barrier was thrown across this current—the authority of Linneus. . . . The atmosphere in which he lived and moved and had his being was saturated with biblical theology, and this permeated all his thinking. Yet, though in the intellectual movement of his time Linnezus was an extreme conservative, if not something of an obscurantist; though he was far surpassed by several of his contemporaries in that kind of insight and constructive power which leads to the discovery of the great general laws of nature; and though the heavy pioneer work even in his favorite science had been done before his time by the great investigators of the end of the seventeenth century—though all this is the case, none of these others equals Linneus in popular repute or in accepted standing in the history of science. I can not say that I think this altogether just, though if it be less than just, the proper inference 2“ Entdeckung der wahren Ursache von der Vermehrung des Getreydes,” 1718. Cf. also his “ Verniinftige Gedanken von dem Gebrauche der Theile in Menschen, Thieren und Pflanzen,” 1725, Pt. II., chap. 5. 3“ Récherches sur l’usage des feuilles,” 1754. 500 POPULAR SCIENCE MONTHLY is not that we should praise Linneus less, but some of the others more. I have, however, mentioned these things, not for the sake of measuring out Linnzus’s glory with a hopeless attempt at exact distributive justice, but for the sake of defining more precisely, and in terms of explicit contrast—which is the only illuminating way of defining—the nature and limits of Linneus’s contribution to the evolution of the sciences. He was the one naturalist of first eminence whose work lay entirely, or almost entirely, within the sphere of descriptive and classificatory sci- ence. His réle is precisely described by the term which he himself em- ployed; he was not the originator of, nor a great discoverer in, botany, but he was the “reformer” of that science, reformator botanices, and in a less degree, of zoology. And in using this term to describe his work, the emphasis should be upon the “form.” He was, in other words, an unsurpassed organizer, both of scientific material and of scientific research; he introduced form and order, clearness and pre- cision, simple definitions and plain delimitations of boundaries, into sciences previously more or less chaotic or confused or impeded with cumbrous and inappropriate categories and terminology. This reformation was the result of the three improvements effec- tually introduced by Linnzus and indissolubly associated with his name. ‘The first, which seemed the most impressive and did most to establish his fame among his contemporaries and for several genera- tions thereafter, was really the least permanent and the least valuable of his contributions: this was the introduction of a new artificial sys- tem of classification, based, in the botanical field, upon the differences of the sexual organs of plants. The second was the introduction of the binomial nomenclature, the system of so-called “trivial” names, which put a final end to the hopeless length and complexity of botanical and zoological specific names, and sharply differentiated the naming of organisms from the description of them. The third and, I suppose, the most useful as well as most durable of all of Linneus’s improve- ments, was the establishment of a new descriptive terminology in botany, the drawing up of a set of terms, each with clearly defined meaning, for designating concisely the distinguishable parts and organs of plants, and the several types of form of which each part is sus- ceptible. By these means Linneus imposed order and harmony upon a realm that had hitherto suffered much from anarchy; he gave a com- mon language to those who tilled its fields, and provided them with working tools of an unprecedented simplicity and convenience. And — where he thus introduced order he also, as a natural consequence, intro- duced abundance. Both directly and indirectly Linneus immensely augmented the store of concrete botanical information. The science thus simplified and systematized and given a convenient means of ex- pression became vastly more attractive and interesting; in particular, LINNAUS 501 it came to be a field in which many minds, of all orders of ability, could do useful work, and could make their work dovetail into the work of others in such wise that each was conscious of having con- tributed a definite part to an immense and impressive edifice of an intelligible outline and design. Alike by the superior convenience of his classification, nomenclature and terminology, by the force and serious enthusiasm of his personality, and by the example of his ad- mirably exact observation, Linneus stimulated a prodigious amount of ardent and careful botanical and zoological research on the part of others. His own pupils went out, literally by the score, not only over Europe, but to the uttermost parts of the earth, to collect new species and study geographical distribution. A number of these young en- thusiasts, whose names are honorably recorded by one of Linnzus’s biographers, lost their lives in these expeditions. The eight volumes of Linneus’s “ Ameenitates Academice” contain 186 dissertations by almost as many of his pupils, the subject and treatment being in nearly every case suggested, and the results corrected, by Linnzus him- self; most of these contain contributions of valuable—and many con- tain what were in their day highly original—botanical, zoological or mineralogical data. Nor was the effect of Linnzus’s simplification and systematization of botany limited to the setting of other and younger men of science to work. His efforts also notably increased the general vogue of botany, as a result of which it long enjoyed an exceptional popularity and an unusual amplitude of endowment among the sciences. This aspect of Linneus’s work is effectively presented—all the more effectively for a considerable touch of rhetorical exaggeration—by Magdeleine de Saint-Agy in his continuation of Cuvier’s “ Histoire des Sciences Naturelles” (1845); the passage illustrates so well, if not precisely, what Linneus did, at least what he had the credit of doing, that I venture to translate it. The influence of Linneus, says this historian, was not limited to the in- vestigations and voyages which he caused to be made; in imitation of him, similar voyages and investigations were ordered made by several states. Sweden, being a small and poor country, had no great means for multiplying such expedi- tions; but England, France and Russia had them carried out in great numbers; and Linnzus during the last years of his life had the pleasure, as Condorcet puts it, of seeing nature interrogated on all sides in his name. There was no class of people—even to princes—who did not busy themselves with natural history, and above all with botany—since this science presents none of the difficulties of anatomy and since the method of Linneus is of a simplicity which renders it accessible to everybody . . . Botany thus became universally familiar. Those who were fond of gardening multiplied the varieties of their plants, since they could now know the names of them without being Latin scholars, and since gardeners could now understand one another when referring to the plants they cultivated. All gardens, both botanical and pleasure gardens, were filled with a multitude of plants which rich folk had brought at great expense from foreign 502 POPULAR SCIENCE MONTHLY lands. The taste for botany dominated all minds; kings became botanists, prop- erly so called, and were desirous of having their own botanical gardens. Louis XV. had the garden of Trianon; George III., that of Kew; Francis I., emperor of Austria, that of Schoenbrunn. These three princes were useful to the science by their gardens and by the emulation which they occasioned; but it is after all, to the happy discovery of a dual nomenclature that these advances were primarily due. From the moment when common names were to be had, corre- sponding in all parts of the globe, collections were zealously made; museums were enriched; and it was not difficult to multiply researches, now that the science was within everybody’s reach. . . . Such is the prodigious impulsion that Linneus gave to the science of natural history. Yet it is important, in the interest of historical truth, to point out that even in these things which constitute his peculiar work—speci- fically, in his reformation in taxonomy, nomenclature and terminology —Linneus was in no respect a pioneer or an originator. It was his good fortune to be able to develop and carry through suggestions and outlines of procedure which had been made by his seventeenth-century precursors, and to exploit to the utmost an abundant legacy of botanical knowledge, methodological ideas, and botanical interest which had come down to his generation. Nothing, indeed, could be farther from the truth than the notion which appears to have wide popular currency, that there was little botanical study or knowledge worth mentioning before Linnzeus. It is, on the contrary, eminently a case where vixerunt fortes ante Agamemnona. Any who suppose sixteenth and seventeenth century botany to be a negligible quantity will find it in- structive to examine the shelves of the hbrary of the Paris Jardin des Plantes; or to remember that Jean Bauhin’s “ Historia universalis plantarum ” (1660), consisting of forty books, contained descriptions of some 5,000 plants, with 3,500 figures, and cost the equivalent of about $18,000 to produce—or that, a little later, Ray’s “ Historia plantarum generalis” gave a classified arrangement and description of 11,700 plants. And while Linneeus assuredly gave, as has been said, a great impulsion to the popular and fashionable interest in botany and zoology, it was an interest which was extremely well developed before his time—which, in fact, made his own work and his own contemporary fame possible. It was not through his influence first that states and monarchs learned the propriety of establishing botanical gardens. The Jardin royal du Louvre, for example, was established by Henri IV. in 1590, and the Jardin des Plantes was founded in 1626. By the middle of the seventeenth century both public and private gardens, often with scientific establishments connected with them, were becom- ing fairly common. And, as I have said, the particular reforms through which chiefly Linnzus achieved his results were essentially not discoveries nor innovations of his own. It will be profitable to note * These figures are taken from Hoefer’s “Histoire de la Botanique,” 1872. LINNAUS 203 briefly the earlier history of the ideas involved in each of these three reforms. First, then, concerning classification. Linneus’s great precursors in this field were Cesalpino,®> Ray and Tournefort. Cesalpino was a sixteenth-century enthusiast of the revival of the Peripatetic philos- ophy; and it was largely the influence of a fresh study of Aristotle’s logic and metaphysics which led him to condemn all the then cus- tomary ways of classifying and naming plants—by their medicinal or other practical properties, the localities in which they are found, and the like—as being based upon mere “ accidentia,’ and to insist upon the necessity of an orderly arrangement by genera and species founded upon the presence of common visible characters.* In his selection of the characters by reference to which the primary division into genera is to be made, he is guided by considerations drawn from the Peripa- tetic metaphysics. The essential character of any “substance” con- sists in its “end” or “function” (opus). The distinctive function of the vegetative soul is twofold, nutrition and “ the generating of its own like”; the latter is the higher, and it also presents more numerous and sensible points of variation in different plants. It follows that plants should be divided into genera according to the differences in form and arrangement of their “ fruit-producing” organs (ex modo fructificandt, ex proprus quae fructificationts gratia data sunt). With this as a starting-point, Cesalpino proceeds to a series of successive divisions in which 840 species find place. MRay’s contributions to tax- onomy had less success and influence than those of Cesalpino and of Tournefort, and are therefore historically less significant ; but concern- ing their intrinsic merit it is worth while quoting the recently expressed opinion of a living botanist of high authority, who places Ray’ as a taxonomist above Linneus himself. It was the English naturalist, says M. Bonnier,’ who must be regarded as “ the true founder of the natural method”; “he it was who first enunciated the essential prin- ciples on which the classification of plants ought to be founded, who made clear the difference between phanerogams and cryptogams, who discovered the distinction between monocotyledons and dicotyledons, who established in a rational manner the main divisions of the vegetable kingdom.” 51519-1603. Cesalpino was a physician to Pope Clement VIII., and pro- fessor of materia medica and director of the botanical garden at Pisa. He was the original discoverer of the circulation of the blood; the doubts which have been sometimes expressed whether he anticipated Harvey’s conception in its fullness have been shown to involve the overlooking of an explicit passage in Cesalpino’s “De Plantis” (1583): ef. Du Petit-Thouars in “ Biographie Uni- verselle,” s. v. *“ De Plantis” (1583), Lib. I., Cap. XIII. 7™« Historia Plantarum,” 1686. 8“ Le monde végétal,” 1907, pp. 48-9. 504 POPULAR SCIENCE MONTHLY At a natural method Tournefort made no more attempt than did Linneus. But of the principles and purposes of a good artificial classification he had an entirely clear comprehension; and of such a classification of then known plants he gave an elaborate and imposing exemplification. Of what a “natural system ” would be, if one could attain to it, Tournefort, like his Swedish successor, had a conception rather mystical or theological than scientific; it would be an arrange- ment of animals and plants according to the “ natural ” or “ essential ” species established by “the Author of Nature.” But for his actual scheme® he recognizes plainly that the primary criteria are the prac- tical ones of simplicity and convenience. A genus or species, for botanical purposes, is “simply the whole group of plants that have a character in common which essentially distinguishes them from all others ”; and in the selection of the characters by means of which the division is to be made we may ignore metaphysical considerations. Tournefort observes (apparently reflecting upon Cesalpino) : “ Let no one say that, since the sole end of nature is the production of fruit, we ought to consider the fruit as the noblest part of the plant. The intentions of nature are not in question here, nor yet the nobility of the several parts; what concerns us is to find means of distinguishing different kinds of plants with the greatest possible clearness. If the least of their parts served this purpose better than those which are called the noblest, it would be necessary to prefer the former.” 'Tourne- fort’s actual classification, based upon the characters of both flowers and fruit, realized these ideals of serviceableness, convenience and con- sistency somewhat imperfectly. But it was the ruling one in the science for nearly half a century; and, accompanied as it was by careful descriptions of an immense number of species, it furnished a model upon which Linnzus needed only to improve. The Swedish naturalist’s simplification of nomenclature was not only approximated, but acually anticipated, by at least one of his predecessors. As Professor Underwood has pointed out, the binomial system of naming plants was used by Cornut in his “ Canadensis Plan- tarum Historia” as early as 1635.1° Later Tournefort, a botanist of greater eminence and influence, though he followed this example only partially, insisted emphatically upon the need for a reform and sim- plification of nomenclature. So far as the names of genera are con- cerned, he observes that “one ought to make a very great difference between naming plants and describing them”; he remarks that “ noth- ing is so unfavorable to the reformation of botany as the habit which °* Klemens de la Botanique,”’ 1694; the Latin version of this, “ Institu- tiones Rei Herbarie,’’ with some alterations, appeared in 1700. * Underwood in Torreya, October, 1903, and in PopuLaR Scrence Monruty, June, 1907. A brief and often binomial nomenclature is ascribed by Bonnier to Belon (d. 1574), whose work I have not seen. LINNAUS 5°05 has come to prevail of judging of the nature of plants from the ety- mology of their names,” and recommends that generic names be formed exclusively “ out of words that have of themselves no meaning”; and he ridicules the long descriptive names then used by many botanists.1* The designations of species, however, he considers, should consist of the name of the genus plus a clear descriptive indication of the differentia of the species; and since the latter can not always be expressed by a single word, Tournefort does not employ a uniformly binomial nomen- clature. But from the reforms already recommended and adopted by the great botanist of the preceding generation to the Linnean sys- tem of “ trivial ” specific names, the step was easy and obvious. Again, in providing botany with an appropriate set of terms for the concise indication of the parts and organs of plants, Linnzus was merely following the suggestion and extending the work of another great seventeenth-century reformer in science. It was Joachim Jung?” —a naturalist whose intellectual force so impressed his contemporaries that Leibniz did not hesitate to compare him to Aristotle, or Comenius to liken him to Euclid—who was the father of comparative morphology in botany, who introduced into the study of the characters of plants real thoroughness and precision, who insisted upon the need for a sys- tem of clear, unambiguous organographic terms, and who himself devised and introduced a number of the terms still in use. His “ Isa- goge Phytoscopica ” (1622) was wholly devoted to urging and exempli- fying this reform; all the principal parts of plants are distinguished and defined with admirable clearness, their possible variations of form noted, and new and explicit names for these variations proposed. Jung seems,** for example, to have been the first to employ the terms petiole or pedicule and perianth; to classify the arrangements of leaflets as digitate and pinnate, and to subdivide the latter sort into paripinnate and imparipinnate; to speak of the disposition of leaves as opposed, alternate, triangulate, ete. The descriptive terminology of botany has, of course, since expanded immensely; but the credit for the origination of the language of that science must unquestionably be assigned to Jung and not to Linneus. It still remains true, however, that Linneus united these three reforms in a single system; that he carried each of them farther than had any of his predecessors; and that by the force of his personality he was able to gain for them a general acceptance which they had hitherto lacked. Though we must, therefore, make some deduction 1“ Klemens de Botanique,”’ 1694, pp. 14, 36, 38. “Born in Liibeck, 1587, died at Hamburg, 1657. He published compara- tively little, and his principal botanical works were brought out by friends after his death. %The assertion that Jung was not anticipated in the use of these terms rests upon the authority of Hoefer, “ Hist. de la Botanique.” 506 POPULAR SCIENCE MONTHLY from the current view of the originality of Linneus’s work as reformer and organizer of botanical knowledge, we need not on that account greatly lower our estimate of its actual importance in the history of science. And yet we must, to get a just picture, always remember the character, as well as the magnitude, of that work; we must remember that it was, all but exclusively, form, system, nomenclature and specific observations that Linneus contributed to the biological sciences, rather than fundamental discoveries, pregnant hypotheses or illuminating general ideas. Even in the presence of the impressive picture of the solid results of Linnzeus’s life-work drawn by the French historian of these sciences, one can not help recalling a caustic remark—which I have already elsewhere cited—of Linnzus’s contemporary, Maupertuis, then president of the Berlin Academy of Sciences. Maupertuis spoke of zoology ; but we may generalize his observation: “ All these treatises on plants and animals which we as yet have,” he says (about 1750), “are —even the most methodical of them—no better than pictures pretty to look at; in order to make of natural history a veritable science, natural- ists must apply themselves to researches which can make us acquainted not simply with the form of this or that organism, but with the gen- eral processes of nature in the production of organisms and the con- servation of them.” 'Towards making natural history a veritable science in this sense Linnezus did relatively little; but it is not quite true to say that he did nothing at all. Towards the discovery or the estab- lishment of two generalized laws respecting the processes of nature in the production and the perpetuation of vegetal organisms Linnzus made some contribution; and of these something ought briefly to be said, the more because they are often neglected in the accounts of Linneus’s work. 1. Although, as has been remarked, the fact of sexuality in plants had been noted by a number of great naturalists before 1718, the doc- trine was not, in Linneus’s youth, at all generally accepted. It was possible at the beginning of the eighteenth century for a botanist so eminent as Tournefort to combat and ridicule the idea; and for the Imperial Academy of Sciences of St. Petersburg, so late as 1759, to offer a prize for the best argument either for or against the doctrine of sex in vegetables. Linnaeus gave the weight of his authority, as well as of some new experimental evidence, to the affirmative of this question. By him the fact may be said to have been finally established ; and by his sexual system of classification the idea was made a familiar and fundamental common-place of even popular botanical knowledge. 2. By his doctrine of the “ Prolepsis Plantarum” and “ Meta- morphosis Plantarum ”—which one of his disciples declared to be “ the most subtle discovery of any which can be put forward by the investi- gators of nature in our age,” but which there lacks space to set forth LINNAUS 507 in its details—Linneus began that theoretical reduction of the several parts of a plant to modifications, under special conditions, of a few simple organs, which Goethe was to elaborate and carry much farther in his “ Metamorphose der Pflanzen” (1790). Goethe makes due acknowledgment of his debt to Linneus (who was his constant study in his early years**) in that treatise, the place of which in the history of botany is well known. Contemporary botanists would, I suppose, incline to question whether this theory has done greater service or harm to the progress of their science. Its chief value lay in its tendency to suggest the idea of the unity of type—and eventually the idea of the common derivation through processes of transformation—of different species. Both of these ideas were far from the mind of Linneus; with him the theory took the form only of the purely specific doctrine of the interchangeability of leaf and flower under varying conditions of nour- ishment, or at different phases of the individual plant’s growth. In these two instances, then, Linneus made some contribution to the unification, as well as to the augmentation, of knowledge. Yet his lack of any penetrating insight into the larger relations of biological facts and the absence in him of any sound grasp of scientific method, disqualified him from taking a place among those who have materially enriched our stock of the ideas and categories which may be used in the interpretation of nature. His emphasis upon the static aspects of the world of living organisms—upon the fixed characters of species—and upon the descriptive rather than explanatory business of scientific inquiry made his influence, on the whole, an obstacle to the develop- ment and diffusion of those evolutional ideas which were already stir- ring in a number of minds of his generation. His ineptitude in the more philosophic part of the naturalist’s work could not be better shown than in the one treatise in which he attempts a broad philo- sophical view and a wide correlation of organic phenomena. ‘This writing, “ Giconomia Nature,” which was greatly admired by his con- temporaries, points out in how diverse and complicated ways organisms of different species interact with one another, and are reciprocally adapted to one another, as wellas to the conditions of survival in their environ- ment. In dilating upon this Linneus may be said to call attention, more than a century before Darwin, to the reality and importance in nature of the struggle for existence between species; for he shows how every kind of organism has its natural enemies, with which it keeps up * The poet himself wrote in his “ Geschichte meines botanischen Studiums ” (1817): “ After Shakespeare and Spinoza, it was Linneus who had the greatest influence upon me—chiefly, indeed, by the opposition that he provoked. For when I strove to make my own his sharp, clear-cut divisions and his apt and serviceable but often arbitrary laws, an inner conflict arose in me: what he sought forcibly to hold apart, the deepest need of my nature made me wish to bring back to unity.” 508 POPULAR SCIENCE MONTHLY an unceasing warfare or competition, as a result of which the otherwise excessive multiplication of each kind is prevented and the equilibrium of nature is preserved. But all these just observations lead Linneus to nothing more useful to science than the quam pulchre! We are invited to see in the arrangement whereby the lion saves the lamb from the Malthusian inconvenience of over-multiplication simply an evi- dence of design in nature. It never occurs to the great naturalist to consider that, as Maupertuis put it, “since only those creatures could survive in whose organization a certain degree of adaptation was pres- ent, there is nothing extraordinary in the fact that such adaptation is found in all the species that now exist.” Looking upon the same gen- eral class of facts as those which were to be considered by Wallace and Darwin, Linneus finds in them nothing but the occasion for the whole- sale introduction of teleological considerations, in place of causal explanations. In setting the example of such a proceeding, Linnzus certainly did much to hold biology back from its proper methods and its proper problems. In this, as in his general failure to take a philo- sophie view of his subject, his mental attitude was peculiarly uncon- genial to the greatest intellect—if not the greatest botanist—of those whom he largely influenced. Goethe kept up a lifelong protest against all purely descriptive science and all introduction of teleological notions into the explanation of natural phenomena. And it is from Goethe in his old age that I may, in closing, quote a somewhat severe, but not unilluminating, remark upon the master of the poet’s early botanical studies ;1° since it contains a sort of philosophical pun, it is necessary to give it in the German: Eine zwar niedere doch schon ideelle Unternehmung des Menschen, ist das Zihlen, wodurch im gemeinen Leben so vieles verrichtet wird; die grosse Bequemlichkeit jedoch, die allgemeine Fasslichkeit und Erreichbarkeit giebt dem Ordnen auch in den Wissenschaften Eingang und Beifall. Das Linnésche System erlangte eben durch diese Gemeinheit seine Allgemeinheit; doch wider- strebte es einer héheren Einsicht mehr, als dass es solche férderte. Yet if Linneus was not qualified to lead biology into the promised land of that “higher insight ”—if he even somewhat delayed its prog- ress thither—it must still be said that he left all the sciences with which he dealt incomparably better provisioned for that progress than they would have been without his work. He left to them an intensified ardor for the scrutiny of all the phenomena of nature, a better com- mand of their own materials, and a greatly enriched and better ordered store of those concrete facts out of which, in time, scientific generaliza- tions often almost spontaneously develop, and by which they must always eventually be tested. 8 « Aphoristisches,” Weimar-Ausg., Teil II., Bd. 6, §356 (1829); cited by Wasielewski in his “ Goethe und die Descendenzlehre.” AGE, GROWTH AND DEATH 509 THE PROBLEM OF AGE, GROWTH AND DEATH By CHARLES SEDGWICK MINOT, LL.D., D.Sc. JAMES STILLMAN PROFESSOR OF COMPARATIVE ANATOMY, HARVARD MEDICAL SCHOOL VI. THe Four Laws or AGE Ladies and Gentlemen: I have referred in these lectures repeatedly to the cell and its two component parts, the nucleus and the proto- plasm. To-night I shall have only a few references to make directly to these, and shall pass on for the latter part of the hour to another class of considerations bearing upon the problem of age. Before we turn to these new considerations, however, I wish to say a few words by way of recapitulation concerning the changes in the cells as corre- sponding to age. Cells, as you know from what I have told you, undergo in the body for the greater part a progressive change which we call their differentiation. We may say that there are four kinds of cells for purposes of an elementary classification to be used in a simple exposition like the present. The first kind are those cells of the young type, in which the protoplasm is simple, and shows as yet no trace of differentiation. These cells are capable of rapid multipli- cation, and some of them are found still persisting in various parts of the adult body, and serve to maintain the growth of the body in its mature stage. Another class of cells presents to us the curious spectacle of a partial differentiation; such are the muscle fibers by which we accomplish our voluntary movements. These fibers consisted originally only of protoplasm with the appropriate nuclei, but, as they are differen- tiated, part of the protoplasm changes into contractile substance. Another part remains pure protoplasm unaltered. If now the mus- cular or contractile portion of the fiber be destroyed, the undifferen- tiated part of the protoplasm then shows that it has still the power of growth. It has only been held back by the condition of organization, and we see in the regeneration of these fibers evidence of the fact that so long as the protoplasm is undifferentiated it has the power of growth, which, however, does not reveal itself unless an opportunity is afforded. Third, we come to the cells which are moderately differen- tiated; such, for instance, are the cells of the liver, and, if for any reason a portion of the liver be injured by accident or disease, we find that these partially differentiated cells reveal at once that they have a limited power of growth still left. If we pass on to the fourth class, that in which differentiation is carried to the highest extreme, we find that the cells do not have the power of multiplication. Such are the POPULAR SCIENCE MONTHLY 510 nerve cells by which the higher functions of the body are carried on. They represent the extreme of cellular differentiation, and almost never do we see these cells multiplying after the differentiation is accom- plished. Presented in this form, we then recognize, it seems to me clearly, the effect of differentiation upon the growth of cells. The facts are clear as to their meaning. We can, however, proceed a little farther than this, because we can actually determine, approximately at least, the rate at which cells mul- tiply, and that we can do by means of determining the mitotic index. The mitotic index is the number of cells to be found at any given moment in the active process of division out of a total of one thousand cells. May I pause a moment to recall this picture to you and ask you to notice at this point the curious darker spot which represents a nucleus in process of division? You will see it would be easy in such a preparation as this to count the nuclei one by one until one had got up toa a ® thousand, and to record, as one went along, mong ee 5) how many of the nuclei are in process of divi- SS a sion, for the nucleus in division is easily recog- oF eo 4 j nized. This process of division is named mitosis: the figure which the nucleus presents while it is undergoing division we call a mi- totic figure. Counting the dividing nuclei, we -—+ may determine that in a thousand cells there are a given number which have nuclei in proc- ess of division, and such a number I propose to Fig. 61. PORTION OF THE all “ the mitotic index.” I wish now only to OUTER WALL OF A PRIMITIVE MUSCULAR SEGMENT OF A CAT EMBRYO OF 4.6 MM. Harvard Embryological Collection Series 398, section 115, The resting nuclei are oval, pale and granular. The dividing or mitotic nuclei, of which there are three, are dark, ir- Tegular in outline and show the chromosomes. In this ease the dividing nuclei all lie near the inner surface of the wall. The picture illu- strates the ease with which mitotic figures may be recog- nized. only 10. There has already been a great reduction. call to you attention this picture because it enables me to illustrate before you the method of measuring the mitotic index. In the rabbit embryo at seven and one half days, I have found by actual count that there are in the outer layer of cells, known techni- cally as the ectoderm, 18 of these divisions per thousand. In the middle layer, technically the mesoderm, 17, and in the inner layer, the ento- derm, 18. At ten days we find the number al- ready reduced, and the figures are, respectively, 14, 13 and 15, and for the cells of the blood In the next phase of development (rabbit embryo of thirteen days), we find, however, that the parts are growing irregularly, some faster, some slower. We note that wherever a trace of differentiation has occurred, the rate of growth is diminished: where that differentiation does not show itself, the AGH, GROWTH AND DEATH SEE rate of growth may even increase in order to acquire a certain special de- velopment of a particular part. So that instead of uniformity of values for the mitotic index, we get a great variety. But, nevertheless, the general decline can be demonstrated by the figures. In the spinal cord the index is 11, in the general connective tissue of the body 10; for the cells of the liver 11; in the outside layer of the skin 10; in the excretory organ 6; 1n the tissue which forms the center of the limb also 6. There has, then, been a rapid decline in the rate of cell multiplication just in this period when differentiation is going on. This is, so far as I know, an entirely new line of research. The counting of a thousand cells is not a thing to be done very rapidly ; it must be undertaken with patience, care, and requires time. It has not, I regret to say, been possible for me yet to extend the number of these counts beyond those I have given you, but it is easy to say that in the yet more differentiated state, the number of cells in division is constantly lessened, and it is only a ques- tion of counting to determine the mitotic index accurately. That there is a further diminution beyond that which the mitotic indices I have demonstrated to you represent is perfectly certain. I only regret that I am not able to give you exact numerical values. I wish very much that my time permitted me to branch off into certain topics intimately associated with the general theme we have been considering together on these successive evenings, but we can only allude to a few of these. The first collateral subject on which I wish to speak to you briefly is that which we call the law of genetic restric- tion, which means that after a cell has progressed and is differentiated a certain distance, its fate is by so much determined. It may from that pass on, turn in one direction or another, always progressing, going onward in its cytomorphosis; but the general direction has been pre- scribed, and the possibilities of that cell as it progresses in its develop- ment become more and more restricted. For instance, the cells which are set apart to form the central nervous system after they are so set apart can not form any other kind of tissue. After the nervous system is separated in the progress of development from the rest of the body, its cells may become either nerve cells proper or supporting cells (neuroglia), which latter never acquire the nervous character proper, but serve to uphold and keep in place the true nervous elements. They represent the skeleton of the central nervous system. After the cells of the nervous system are separated into these two fundamental classes they can not change. A cell forming a part of the supporting frame- work of the brain can not become a nerve cell; and a nerve cell can not become a supporting cell. The destiny of them becomes more and more fixed, their future possibilities more and more limited, as their cytomorphosis goes on. The law of genetic restriction has a very important bearing upon questions of disease. When disease occurs, the cells of the body offer 512 POPULAR SCIENCE MONTHLY to us two kinds of spectacles. Sometimes we see that the cells causing the diseased condition are more or less of the sort which naturally be- long in the body; that they are present where they do not belong, or they are present where they ought to be, but in excessive quantity. There is a kind of tumor which we call a bony tumor. It consists of bone cells such as are naturally present in the body, but that which makes this growth of bone a tumor is its abnormal dimensions, or per- haps its being altogether in the wrong place. The second sort of pathological alteration, which I had in mind, is that in which the cells really change their character. Now, the young cells are those which can change most; in which the genetic restriction has least come into play ; and accordingly we find that a large number of dangerous, morbid growths, tumors, arise from cells of the young type, and these cells, having an extreme power of multiplication, grow rapidly, and they may assume a special character of their own; their genetic restriction has not gone so far that all their possibilities of change in the way of differ- entiation have been fixed; there is a certain range of possibilities still open to them, and they may turn in one direction or the other. Hence there may be pathological growths of a character not normally present in the body. It seems to me, so far as my knowledge of this subject enables me to judge, to be true that all such pathological growths de- pend upon the presence of comparatively young and undifferentiated cells being turned into a new direction. The problem of normal development and of abnormal structure is one and the same. Both the embryologist and the anatomist, on the one hand, and the pathologist and the clinician on the other, deal ever with these questions of differ- entiation, and practically with no others. All that occurs in the body is the result of various differentiations, and whether we call the state of that body normal or pathological matters little; still the cause of it is the differentiation of the parts. The second of the collateral topics which I should like briefly to allude to is another branch of the study of senescence. The fact was first emphasized by the late Professor Alpheus Hyatt that in many animals there exist parts formed in an early stage and thereafter never lost. The chambered nautilus is an animal of this kind. The inner- most chamber represents the youngest shell of the nautilus, and as its age increases, it forms a new chamber in its shell, and so yet more and more until the coil is complete. When we examine a shell of that kind we see permanently before us the various stages, both young and old, as recorded in shell formation. And so too in the sea-urchin, and in many of the common shell-fish, we find the double record, of youth and old age, preserved permanently. This has made it possible for Pro- fessor Hyatt and for Professor Robert T. Jackson, who has adopted a similar guiding principle, to bring a great deal of new light into the study of animal changes, and to attack the solution of problems which AGE, GROWTH AND DEATH 513 without the aid of this senescent interpretation, if I may so term it, would be utterly impossible. This is an enticing subject, and I wish I had both time and competency to dwell upon it. But it is aside, as you see, from the main inquiries with which we have been occupied, for our inquiries concern chiefly the effect of cell-change upon the properties of the body, and the correlation of cell-change with age. A natural branch of our topic is, however, that of longevity, the duration of life. Concerning this, we have very little that is scien- tifically satisfactory that we can present. We know, of course, as a fundamental principle, that every animal must live long enough to reproduce its kind. Did that not occur, the species would of course become extinct, and the mere fact that the species is existing proves, of course, this simple fact—that life has lasted long enough for the parents to produce offspring. The consideration of this fact has led certain naturalists to the supposition that reproduction is the cause of their termination of life; but it is not, it seems to me, at all to be so interpreted. We know, in a general way, that large animals live longer than small ones. The elephant is longer lived than the horse, the horse than the mouse, the whale than the fish, the fish than the insect, and so on through innumerable other instances. At first this seems a promising clue, but if we think a moment longer we recognize quickly the fact that a parrot, which is much smaller than a dog, may live one hundred years, whereas a dog is very old at twenty. There are insects which live for many years, like the seventeen-year locusts, and others which live but a single year or a fraction even of one year, and yet the long-lived and the short-lived may be of the same size. It is evident, therefore, that size is not in itself properly a measure of the length of life. Another supposition, which at first sounds very attract- ive, is that which explains the duration of life by the rate of wear, of the using up, of the wearing out, of the body. This theory has been particularly put forward by Professor Weismann, who in his writings calls it the Abnutzungstheorie—the theory of the wearing out of the body. But the body does not really wear out in that sense. It goes on performing the functions for a long time, and after each function is performed the body is restored, and we do not find at death that the parts have worn out. But, as we have seen, we do find at death that there has been an extensive cytomorphosis, cell-change, and that the living material, after having acquired its differentiation, passes now in one part, now in another, then in a third, to a yet further stage, that of degeneration, and the result of degeneration, or atrophy, as the case may be, is that the living protoplasm loses its living quality and be- comes dead material, and necessarily the functional activity ceases. We must, it seems to me, conclude that longevity, the duration of life, depends upon the rate of cytomorphosis. If that cytomorphosis is VOL. LXxI.—33. 514 POPULAR SCIENCE MONTHLY rapid, the fatal condition is reached soon; if it is slow, the fatal condi- tion is postponed. And cytomorphosis in various species and kinds of animals must proceed at different rates and at different speeds at different ages. Birds grow up rapidly during their period of develop- ment; the cell change occurs at a high speed, far higher than that which occurs in man, probably, during his period of development. But after the bird has acquired its mature development, it goes on almost upon a level for a long time; the bird which becomes mature in a single year may live for a hundred or even more. There can be during these hundred years but a very slow rate of change. But in a mammal, a dog or a cat, creatures of about the same bulk as some large birds, we find that the early development is at a slower rate. The animals take a much longer period to pass through their infancy and reach their maturity, but after they have reached their maturity they do not sustain themselves so long. Their later cytomorphosis occurs at a higher speed than the bird’s. This is a field of study which we can only recognize the existence of at present, and which needs to be ex- plored before, to any general, or even to a special scientific, audience, any promising hypotheses can be presented. Definite conclusions are of course still more remote. Next as regards death. The body begins its development from a single cell, the number of cells rapidly increase, and they go on and on increasing through many years. Their whole succession we may appropriately call a cycle. Each of our bodies represents a cell cycle. When we die, the cycle of cells gives out, and, as I have explained to you in a previous lecture, the death which occurs at the end of the natural period of life is the death which comes from the breaking down of some essential thing—some essential group of members of this cell cycle; and then the cycle is broken up. But the death is the result of changes which have been going on through the successive generations of cells making up this cycle. There are unicellular organ- isms; these also die; many of them, so far as we can now determine, never have any natural death, but there are probably others in which natural death may occur. It is evident that the death of a unicel- lular organism is comparable to the death of one cell in our own bodies. It is not properly comparable to the death of the whole body, to the ending-up of the cell cycle. Is there anything like a cell cycle among the lower organisms? among the protozoa, as the lowest animals are called? It has been maintained by a French investigator, by the name of Maupas, that such a cycle does exist, that even in these low organisms there is a cell which begins the development, and that gradually the loss in the power of cell multiplication goes on until the cycle gives out and has to be renewed by a rejuvenescent process, and this rejuvenating process he thinks he has found in the so-called conjugating act of these animals, in which there occurs a curious migration of the nucleus of AGH, GROWTH AND DEATH 515 one individual into the cell body of another. Whether he is right or not remains still to be determined. You will recognize, I hope, from what I have said, that we have now some kind of measure of what con- stitutes old and young. We can observe the difference in the propor- tion of protoplasm and nucleus, the increase or diminution, as the case may be, of one or the other. If it be true that there is among protozoa, among unicellular animals, anything comparable to the gradual decline in the growth power which occurs in us, we shall expect it to be revealed in the condition of the cells—to see in those cells which are old an increase in the proportion of protoplasm, and consequently a diminution in the relative amount of nucleus. That subject is now being investigated, and we shall probably know, within a few years at least, something positive in this direction. At present we are reduced to posing our question. We must wait patiently for the answer. The scientific man has many occasions for patience. He has to make his investigations rather where he can than where he would like to. Certain things are accessible to our instruments and methods of research at the present time, but other things are entirely hidden from us and inaccessible at the present. We are indeed, more perhaps than people in any other profession of life, the slaves of opportunity. We must do what we can in the way of research, not always that which we should like most to do. Perhaps a time will come when many of the questions connected with the problems of growing old, which we can now put, will be answered, because opportunities, which we have not now, will exist then. Scientific research offers to its devotees some of the purest delights which life can bring. The investigator is a creator. Where there was nothing he brings forth something. Out of the void and the dark, he creates knowledge, and the knowledge which he gathers is not a precious thing for himself alone, but rather a treasure which by being shared grows; if it is given away it loses noth- ing of its value to the first discoverer, but acquires a different value and a greater usefulness that it adds to the total resources of the world. The time will come, I hope, when it will be generally understood that the investigators and thinkers of the world are those upon whom the world chiefly depends. I should like, indeed, to live to a time when it will be universally recognized that the military man and the govern- ment-maker are types, which have survived from a previous condition of civilization, not ours; and when they will no longer be looked upon as the heroes of mankind. In that future time those persons who have really created our civilization will receive the recognition which is their due. Let these thoughts dwell long in ‘your meditation, because it is a serious problem in all our civilization to-day how to secure due recognition of the value of thought and how to encourage it. I believe every word spoken in support of that great recognition which is due 516 POPULAR SCIENCE MONTHLY to the power of thought is a good word and will help forward toward good results. In all that I have said, you will recognize that I have spoken con- stantly of the condition of the living material. If it is in the young state it has one set of capacities. If it is differentiated, it has, accord- ing to the nature of its differentiation, other kinds of capacities. We can follow the changing structure with the microscope. We can gain some knowledge of it by our present chemical methods. Fragmentary as that knowledge is, nevertheless, it suffices to show to us that the con- dition of the living material is essential and determines what the living material can do. I should like to insist for a moment upon this conception, because it is directly contrary to a conception of living material which has been widely prevalent in recent years, much de- fended and popularly presented on many different occasions. The other theory, the one to which I can not subscribe, may perhaps be most conveniently designated by the term—the theory of life units. It is held by the defenders of this faith that the living substance contains particles, very small in size, to which the vital properties are especially attached. They look at a cell and find that it has water, or water con- taining a small amount of salts in solution, fillmg up spaces between the threads of protoplasm. Water is not alive. They see in the protoplasm granules of one sort and another, in plants chlorophyll, in animals perhaps fat or some other material. That is not living sub- stance, and so they go striking out from their conception of the living material in the cell one after another of these component parts until they get down to something very small, which they regard as the life unit. I do not believe these life units exist. It seems to me that all these dead parts, as this theory terms them, are parts of the living cell. They are factors which enable the functions of life to go on. Other conditions are also there, and to no one of them does the quality of life properly attach itself. Of life units there is an appalling array. The most respectable of them, in my opinion, are the life units which were hypothetically created by Charles Darwin in his theory of pan- genesis. He assumed that there were small particles thrown off from different portions of the body circulating throughout the body, gather- ing sometimes in the germ cells. These particles he assumed to take up the qualities of the different parts of the body from which they emanated, and by gathering together in immense numbers in the germ cells they accomplished the hereditary transmission. We know now that this theory is not necessary, that it is not the correct theory. But at the time that Darwin promulgated it, it was a perfectly sound defensible theory, a theory which no one considering fairly the history of biological knowledge ought to criticize unfavorably. It was a fine mental achievement, but I should like also to add that of all the many theories of life units, this of Darwin’s is the only one which seems to AGH, GROWTH AND DEATH 517 me intellectually entirely respectable. Of supposed structural life units there is a great variety. Besides the gemmules of Darwin, there were the physiological units of Herbert Spencer. Professor Haeckel, the famous German writer, has special structural life units of his own which he terms plastidules; he gave them the charming alliterative title of perigenesis of the plastidules; the rhythm of it must appeal to you all, though the hypothesis had better be forgotten. Then came Nageli, the great botanist, who spoke of the Idioplasma-Theilchen. Then Weisner, also a botanist, who spoke of the Plassomes. Our own Pro- fessor Whitman attributed to his life units certain other essential quali- ties and called them idiosomes. A German zoologist, Haacke, has called them gemmules. Another German writer, a Leipzig anatomist, Altmann, calls them granuli. Now these different life units, of which I have read you briefly the names, are not identical according to these authors. Everybody else’s life units are wrong, falsely conceived, and endued with qualities which they do not combine. There is a curious assemblage here of doxies, and each writer is orthodox and all the others are heterodox; and I find myself viewing them all from the standpoint of my doxy, that of the structural quality of the living matter, and, therefore, interpreting every one of these conceptions as heterodox, not sound doctrine, but something to be rejected, condemned and fought against. These theories of life units have filled up many books. Among the most ardent defenders of the theory of life units is Professor Weismann, whose theories of heredity many of you have heard discussed ; though I doubt if many of you, unless you recall what I said previously, are aware of the fact that the essential part of Weismann’s doctrine was the discovery of the theory of germinal con- tinuity by Professor Nussbaum, whose name is seldom heard in these discussions. Weismann has gone much farther in the elaboration of the conception of life units than any of the other writers. He thinks the smallest of the life units are biophores. A group of biophores brought together constitutes another order of life units which he calls determinants; the determinants are again grouped and form ids; and the ids are again grouped and form idants. If you want to accept any theory of life units, I advise you to accept that of Weismann, for it offers a large range for the imagination, and has a much more formidable number of terms than any other. I want to pass now to an utterly different line of study, the question of psychological development. If it be true that the development is most rapid at first, slower later, we should expect to find proof of that rate in the progress of mental development. In other words, we should expect to find that the baby developed faster than the child mentally, that the child developed faster than the young man, and the young man faster than the old. And do you not all instinctively feel immediately that the general assertion is true? In order, however, that 518 POPULAR SCIENCE MONTHLY you may more fully appreciate what I believe to be the fact of mental development going on with diminishing rapidity, I should lke to pic- ture to you briefly some of the things which the child achieves during the first year of its life. When the child is born, it is undoubtedly sup- plied with a series of the indispensable physiological functions, all those which are concerned with the taking in and utilizing of food. The organs of digestion, assimilation, circulation and excretion are all functionally active at birth. The sense organs are also able to work. Sense of taste and of smell are doubtfully present. It is maintained that they are already active, but they do not show themselves except in response to very strong stimulation. Almost the only additional faculty which the child has is that of motion, but the motions of the new-born baby are perfectly irregular, accidental, purposeless, except the motions which are connected with the function of sucking, upon which the child depends for its nourishment. The instinct of sucking, the baby does have at birth. It might be described as almost the only equip- ment beyond the mere physiological working of its various organs. But at, one month we find that this uninformed baby has made a series of important discoveries. It has learned that there are sensations, that they are interesting; it will attend to them. You all know how a baby of one month will stare; the eyes will be fastened upon some bright and interesting object. At the end of a month the baby shows evidences of having ideas and bringing them into correlation, associa- tion, as one more correctly expresses it, because already after one month, when held in the proper position in the arms, it shows that it expects to be fed. There is, then, already evidence and trace of memory. At two months much more has been achieved. The baby evidently learns to expect things. It expects to be fed at certain times; it has made the great discovery of the existence of time. And it has made the discovery of the existence of space, for it will follow, to some extent, the bright light; it will hold its head in a certain position to catch a sound appar- ently from one side; or to see in a certain direction. The sense of space and time in the baby’s mind is, of course, very imperfect, doubt- less, at this time, but those two non-stuff realities about which the metaphysicians discuss so much, the two realities of existence which are not material, the baby at this time has discovered. Perhaps, had some great and wonderfully endowed person existed who preserved the memory of his own psychological history, of his development during babyhood, we should have been spared the gigantic efforts of the meta- physicians to explain how the notions of space and time arose. With- out knowing how, the baby has acquired them, and has already become a rudimentary metaphysician. We see, also, at the end of the third month, that the baby has made another remarkable discovery. It has found not merely that its muscles will contract and jerk and throw its parts about, which is doubtless earlier a great delight to it; but that AGE, GROWTH AND DEATH 519 the muscles can contract in such a way that the movement will be directed ; there is a coordination of the muscular movements. I should like to read to you just these three or four lines from Miss Shinn, who has given perhaps the best story of the development of a baby which has yet been written. This is not merely my opinion, but also the opinion of my psychological colleagues at Cambridge whom I consulted before venturing to express the idea before you, and I find that they take the view that Miss Shinn’s book, which is charmingly written, is really done with such precision and understanding of the psychological problems involved that it may fairly be called the best of the books treating of the mental development of a baby. Miss Shinn says, re- ferring to the condition of the child at the end of two months—“ Such is the mere life of vegetation the baby lived during the first two months; no grown person ever experienced such an expansion of life—such a progress from power to power in that length of time.” She is not thinking of senescence, as we have been thinking of it, but she makes precisely the assertion, which seems to me to be true, that the baby in two months has accomplished an amount of development which no adult is capable of. And now at three months we find another great discovery is made by the baby, that it is possible to bring the sensations which it receives into combination with the movements which it makes. It learns to coordinate its sensory impressions and its motor responses. We hardly realize what a great réle this adjustment, between what our muscles can do and what our senses tell us, plays in our daily life. It is the fundamental thing in all our daily actions, and though by habit we perform it almost unconsciously, it is a thing most difficult to learn. Yet the baby has acquired the art, though he only gradually gets to be perfect in it. Again we see, at the end of the fourth month, that the baby begins to show some idea of another great principle— the idea that it can do something. It shows evidence of having purpose in what it does. Its movements are no longer purely accidental. At four months we find yet another equally astonishing addition to the achievements of this marvelous baby. He makes the amazing discovery that the two sides of an object are not separate things, but are parts of the same. When a face, for instance, disappears by a person’s turning around, that face, to a baby of one month, probably simply vanishes, ceases to exist: but the baby at four months realizes that the face and the back of the head belong to the same object. He has acquired the idea of objects existing in the world around him. That is an enormous achievement, for this little baby has no instructor; he is finding out these things by his own unaided efforts. Then at five months begins the age of handling, when the baby feels of everything. It feels urgently of all the objects which it can get hold of and perhaps most of all of its own body. It is finding that it can touch its various parts and that when its hands and parts of its own body come in contact it has the double 520 POPULAR SCIENCE MONTHLY sensation, and learns to bring those together and thereby is manufactur- ing in its consciousness the conception of the ego, personal, individual existence, another great metaphysical notion. Descartes has said— Cogito, ergo sum—I think, therefore Iam. The baby, if he had written in Descartes’s place, would have said—“ I feel, therefore Iam.” The first five months constitute the first period of the baby’s development. Its powers are formed, and the foundations of knowledge have been laid. The second period is a period of amazing research, constant, uninter- rupted, untiring; renewed the instant the baby wakes up, and kept up until sleep again overtakes it. In the six months’ baby we find already the notion of cause and effect. You see he is dealing mostly in meta- physical things, getting the fundamental concepts. That there is such an idea as cause and effect in the baby’s mind is clearly shown by the progress of its adaptive intelligence. It evidently has now distinct purposes of its own. It shows clearly at this age also another thing which plays a constant and important réle in our daily life. It has the consciousness of the possibilities of human intercourse; it wants human companionship. And with that the baby’s equipment to start upon life is pretty well established. It has discovered the material universe in which it lives, the succession of time, the nature of space, cause and effect, its own existence, its ego and its relationship with other in- dividuals of its own species. Do we get at any time in our life much beyond this? Not very much; we always use these things, which we learn in the first six months, as the foundation of all our thought. By eight months baby is upon the full career of experiment and ob- servation. Everything with which the baby comes in contact interests him. He looks at it, he seizes hold of it, tries to pull it to pieces, studies its texture, its tensile strength, and every other quality it pos- sesses. Not satisfied with that, he will turn and apply his tongue to it, putting it in his mouth for the purpose of finding out if it has any taste. In doing this, hour after hour, with unceasing zeal, never inter- rupted diligence, he rapidly gets acquainted with the world in which he is placed. At the same time he is making further experiments with his own body. He begins to tumble about; perhaps learns that it is possible to get from one place to another by rolling or creeping, and slowly he discovers the possibility of locomotion, which you know by the end of the year will have so far perfected itself that usually at twelve months the baby can walk. During this period of from five months to twelve the baby is engaged upon a career of original research, unaided much by anybody else, getting doubtless a little help and, of course, a great deal of protection, but really working chiefly by himself. How wonderful it all is!’ Is any one of us capable of beginning at the moment we wake to carry on a new line of thought, a new series of studies, and to keep it up full swing, with unabated pace, all day long till we drop asleep? Every baby does that every day. AGH, GROWTH AND DEATH 521 When we turn to the child who goes to school, behold how much that child has lost. It has difficulties with learning the alphabet. It struggles slowly through the Latin grammar, painfully with the subject of geometry, and the older it gets, the more difficult becomes the achievement of its study. The power of rapid learning, which the baby has, is clearly already lessened. The introduction of athletics affords a striking illustration of the decline of the learning power with the progressing years. When golf first came in it was considered an excellent game for the middle-aged ; and you have all watched the middle-aged man play. He was so awk- ward, he could not do it. Day after day the man of forty, fifty, or even older, would go to the golf field, hoping each time to acquire a sure stroke, but never really acquiring it. The young man learned better, but the good golf players are those who begin as children, twelve and fourteen years of age, who in a few months become as expert and sure as their fathers wished to become, but could not. In bicycling it was the same. Hight lessons was considered the number necessary to teach the intelligent adult to ride a wheel. Three for a child of eight. And an indefinite number of lessons, ending in failure, for a person at seventy. It would have been scientifically interesting to have kept an exact record of the period of time which it took at each age to learn bicycling, but I think enough has been said to convince you that if we could acquire such a measure of psychological development as would enable us to express its rate in figures, we should be able to construct a curve like the curve which I showed you in the third lecture illustrating the decline in the rate of growth, and we should see that during the early years of life, the decline in the power of learning was extremely rapid, during childhood less rapid, during old age very slow. But the great part of the decline would occur during early years. Here we see the principle of stability, in maturity, which we see also illustrated in structure and growth. The mind acquires its devel- opment; it retains that development in the adult a long time. But surely there comes a period when the exercise of the mind is difficult. It requires a great effort to do something new and unaccustomed. A sense of fatigue overwhelms us. I believe that this principle of psy- chological development, paralleling the career of physical development, needs to be more considered in arranging our educational plans. For if it be true that the decline in the power of learning is most rapid at first, it is evident that we want to make as much use of the early years as possible—that the tendency, for instance, which has existed in many of our universities, to postpone the period of entrance into college, is biologically an erroneous tendency. It would be better to have the young man get to college earlier, graduate earlier, get into practical life or into the professional schools earlier, while the power of learning is greater. 522 POPULAR SCIENCE MONTHLY Do we not see, in fact, that the new ideas are indeed for the most part the ideas of young people. As Dr. Osler, in that much-discussed remark of his, has said, the man of forty years is seldom the productive man. Dr. Osler also mentioned the amiable suggestion of Trollope in regard to men of sixty, which has been so extremely misrepresented in the newspaper discussions throughout the country, causing biologists much amusement. But I think that Dr. Osler probably took a far too amiable view of mankind, and that in reality the period when the learn- ing power is nearly obliterated is reached in most individuals very much earlier. As in every class of biological facts, there is here the principle of variation to be kept in mind. Men are not alike. The great majority of men lose the power of learning, doubtless some more and some less, we will say, at twenty-five years. Few men after twenty- five are able to learn much. They become day laborers, mechanics, clerks of a mechanical order. Others probably can go on somewhat longer, and obtain higher positions; and there are men who, with ex- treme variations in endowment, preserve the power of active and orig- inal thought far on into life. These of course are the exceptional men, the great men. We have lingered so long together studying phenomena of growth, that it is natural to allude to one more, which is as singular as it is interesting, namely, the increase in size of Americans. It was first demonstrated by Dr. Benjamin A. Gould in his volume of statistics derived from the records of the Sanitary Commission—a volume which still remains the classic and model of anthropometric research. Any one, however, can observe that the younger generation of to-day tends conspicuously to surpass its parents in stature and physical develop- ment. How to explain the remarkable improvement we do not know. Our discovery of the fact that the very earliest growth is so enormously rapid, makes that earliest period especially important. If the initial growth can be favored a better subsequent development presumably would result. In brief, I find myself led to the hypothesis that the better health of the mothers secures improved nourishment in the early stages of the offspring, and that the maternal vigor is at least one important immediate cause of the physical betterment of the children. Much is said about the degeneracy of the American race, but the con- trary is true—the American race surpasses its European congeners in physical development. You will naturally wish to ask, before I close the series of lectures, two questions. One, how can rejuvenation be improved ; the other, how can senescence be delayed. These questions will strike every one as very practical. But the first, I fear, is not an immediately practical question, but rather of scientific interest, for we must admit that the production of young individuals is, on the whole, very well accom- plished and much to our satisfaction. But in regard to growing old, AGE, GROWTH AND DEATH 523 in regard to senescence, the matter is very different. There we should, indeed, like to have some principle given to us which would delay the rate of senescence and leave us for a longer period the enjoyment of our mature faculties. I can, as you have readily surmised by what I have said to you, present to you no new rule by which this can be ac- complished, but I can venture to suggest to you that in the future deeper insight into these mysteries probably awaits us, and that there may indeed come a time when we can somewhat regulate these matters. If it be true that the growing old depends upon the increase of the protoplasm, and the proportional diminution of the nucleus, we can perhaps in the future find some means by which the activity of the nuclei can be increased and the younger system of organization thereby pro- longed. That is only a dream of the possible future. It would not be safe even to call it a prophecy. But stranger things and more unexpected have happened, and perhaps this will also. I do not wish to close without one added word. The views which I have presented before you in this series of lectures I am personally chiefly responsible for. Science consists in the discovery made by indi- viduals, afterwards confirmed and correlated by others, so that they lose their personal character. The views which I have presented to you, you ought to know are still largely in the personal stage. Whether my colleagues will think that the body of conceptions which I have presented are fully justified or not, I can not venture to say. I have to thank you much, because between the lecturer and his audience there is established a personal relation, and I feel very much the compliment of your presence throughout this series of lectures, and of the very courteous attention which you have given me. To recapitulate—for we have now arrived at the end of our hour— we may say that we have established, if my arguments before you be correct, the following four laws of age. First, rejuvenation depends on the increase of the nuclei. Second, senescence depends on the increase of the protoplasm, and on the differentiation of the cells. Third, the rate of growth depends on the degree of senescence. Fourth, senescence is at its maximum in the very young stages, and the rate of senescence diminishes with age. As the corollary from these, we have this—natural death is the con- sequence of cellular differentiation. 524 POPULAR SCIENCE MONTHLY RADIOACTIVITY OF ORDINARY SUBSTANCES By W. W. STRONG JOHNS HOPKINS UNIVERSITY URING the latter part of the nineteenth century a great deal of work was done upon electrical discharges in rarefied gases. In 1895 Rontgen made the epoch-making discovery that such a discharge was the source of very penetrating radiations. These radiations he called X-rays on account of their unknown nature, and he found that they possessed the power of making a gas a conductor of electricity by producing in it a great number of positively and negatively charged car- riers or ions. Besides ionizing a gas, the X-rays were found to affect a photographic plate just as light rays do and to be able to penetrate thin sheets of the metals and many other bodies which are opaque to light. It was found in the course of experimentation that these X-rays were closely related to the stoppage of the cathode particles or cor- puscles, and the phosphorescence on the walls of the vacuum tube which these corpuscles excite. In 1897 J. J. Thomson found that these cathode particles or corpuscles were small negatively charged particles of an apparent mass only one seven-hundredth that of the hydrogen atom and that in a “ high vacuum” tube in a strong electric field they acquired a velocity approximating that of light. All the properties of the corpuscles were found to be the same, no matter what kind of gas or electrodes were in the discharge tube. Their mass was found to vary with their velocity in such a way that the whole mass of the corpuscle could be ascribed to the electric charge which it car- rie?. From this most important discovery it was concluded that all the common substances were partly made up of corpuscles, and this conclusion has been strengthened by all later discoveries. After Thomson’s discovery, Stokes showed that the sudden stoppage of the corpuscles by the walls of the discharge tube caused intense electro- magnetic disturbances to travel out from the point of impact. These disturbances are the X-rays and travel with the velocity of light. DISCOVERY OF RADIOACTIVITY When Roéntgen announced his discovery, it created a great impetus in the study of everything related to electrical discharges. Now it had been known for a long time that some bodies like the uranium salts phosphoresce when exposed to sunlight, and it occurred to H. Becquerel that such a phosphorescing body might emit X-rays, this RADIOACTIVITY 525 emission being analogous to the origin of X-rays in the phosphorescing glass walls of a vacuum tube. In accordance with this view in 1896 he exposed a photographic plate to uranium sulphate which was cov- ered with copper and aluminium foil and found that the plate was acted upon. Accidentally he found that this action took place, no matter whether the uranium nitrate was phosphorescing or not, and he found that uranium which had never been exposed to sunlight pos- sessed the same property. He found that these radiations from ura- nium were similar to the X-rays in their penetrating power. This was the first discovery of the possession of radioactivity by a body, +. e., the power of a body to ionize a gas, to affect a photographic plate or to produce phosphorescence. Madame Curie then took up the problem of finding whether other substances possessed the properties of uranium and found that tho- rium did. She made a detailed investigation then of all the elements and found that none, with the exception of uranium and thorium, possessed these properties even to the order of the hundredth part of that of uranium. She, however, found that some minerals possessed a greater radioactivity than uranium or thorium, and concluded that these must contain elements more highly radioactive than either of these. After much tedious, but brilliant, work she was able to sepa- rate out the very radioactive element radium. As a result of the work of the Curies, and many others, it was found that thorium, uranium, radium and actinium were radioactive, the latter two being intensely so. None of the other elements were found to possess any radioac- tivity to within the limits of the experimental errors of the method of observation. The study of these radioactive elements has been the source of very important discoveries in physics. These elements are found to emit spontaneously a continuous flight of material particles, projected with great velocity, and also to be the source of radiations similar to X-rays and called y rays. We will now describe the material particles, which are of two kinds, the a and £ rays. The a rays consist of positively charged particles shot out by the radioactive body with a velocity approaching that of light. They are readily absorbed by thin sheets of metal foil or by a few centimeters of air. The @ rays are far more penetrating in character than the a rays and consist of negatively charged bodies projected with velocities of the same order of magnitude as that of light. As far as known, they are identical with the corpuscles. Of the three kinds of rays, the a Tays produce the greatest amount of ionization and the y rays the least. With a thin layer of unscreened radioactive matter spread on the lower of two plates, say 5 cm. apart, it will be found that the rela- tive order of ionization due to the a, 8 and y rays is as 10,000 to 100 to 1, whereas the average penetrating power is inversely proportional 526 POPULAR SCIENCE MONTHLY to the relative ionization. The photographic action is due almost entirely to 8 rays. THE DISINTEGRATION THEORY The radioactivity of the radio-elements is not a molecular, but an atomic, property, and the rate of emission of the radiations depends on the amount of the element present and is unaffected by the applica- tion of any known physical or chemical forces. In order to explain the emission of positively and negatively charged particles, Rutherford and others consider the radio-elements as undergoing spontaneous changes and that the energy of projection of the a and @ rays had pre- viously been stored up in the atom as rapid oscillatory or orbital motion. This breaking up of the atoms is considered to be accompanied by the production of a series of new substances which have distinct physical and chemical properties. For instance, thorium produces an intensely radioactive substance, thorium X, which is soluble in ammonia. Tho- rium gives rise also to a gaseous product, the thorium emanation, and this is the source of another substance, which is deposited on the sur- face of bodies in the neighborhood of the thorium, and which is known as the “excited activity” or the “active deposit.” If a negatively charged wire is brought into close proximity with thorium salts, the “active deposit” will form upon it. The “active deposit” itself decays into a succession of products. Following will be given some of the products of the various radio- active elements and some of their properties. TABLE I. TRANSFORMATION PrRopucts. THE THORIUM GROUP Time to be Seri Range of Physical and Chemical Product pis 2 See Radiations a Rays Properties Thorium 2(10)% yrs.| Rayless (?) Insoluble in ammonia Radiothorium | ? a rays 3.9 cm. Thorium X 3.6 days oh 5.7 cm. Soluble in ammonia Emanation 54 secs. - 5.5 em. Inert gas condensing i" at —120° C ‘a ( Thorium A : me sy = The active deposit a 3 isconcentrated on the = Thorium B 1 hr. a rays 5.0 em. cathode in an elec- Fj tric field. & (Thorium C Very short| a, f,y rays | 8.6 cm. THE URANIUM GROUP Uranium | (10)? yrs. a rays 3.5 cm. | Soluble in an ex- cess of ammonium carbonate Uranium X 22 days 8 &y rays Insoluble in ammo- ' nium carbonate. RADIOACTIVITY 527 Tue ACTINIUM GROUP Actinium Pag, Rayless Insoluble in am- monia =— Radioactinium) 19.5 days | a rays 4.8 cm. Carried down in an actinium solution by adding BaCl, Actinium X 10.2 days a 6.55 em. Soluble in am- monia Emanation 3.9 secs. cs 5.8 cm. Behaves like a gas -@ ( Actinium A 36 min. Rayless a The active deposit & is concentrated on = the cathode in an = electric field < Actinium B | 2 min. a, B, y rays THE RADIUM GROUP Radium 1,300 yrs. | @ rays 3.50 cm. Allied chemically to barium Emanation 3.8 days 4 4.33 cm. Inert gas of heavy molecular _ weight, condensing at © —150° C. 32 | Radium A 3 min. es 4.83 cm. The active deposit 2.8 Radium B 26 min. Braysof low is concentrated on the AS penetra- cathode in the elec- ae ting power tric field Om <¢ \ Radium C 19 min. a, 8, y rays | 7.06 cm. _| Radium Dor) 40 years Rayless Volatile below =&| Radiolead 1,000° C. 22] Radium E 6 days B rays Non-volatile at as 1,000° ©. 25 | Radium F or| 140days | a rays 3.86 cm. Deposited in bis- 8 polonium or muth in solution. <5 radiotellu- | rium In connection with these tables it may be well to consider the a particles a little more. It has been found that the a particles of any one product are emitted with the same velocity. It is found that after passing through a definite distance of gas, they then cease to ionize it. If the gas is air under normal conditions of pressure and temperature, this distance will be the range of the a particle. All experiments up to the present indicate that the a particles of the different products differ only in the speed of projection, this speed determining the range of ionization. Rutherford has found an empirical relation between the range of the a particle and its velocity at any point in its path. If r is the remaining range after passing through a screen, its velocity is V=.348 V, Vr-+ 1.25, where V, is the initial velocity of the a particles emitted from radium C, and is 2.06 (10)® cm. per sec. The initial velocity of expulsion of an a particle from a certain product will then be a constant. The value of e/m for all a rays measured has been found to be the same and to be about 5.07 (10)* electro-mag- netic units. It thus follows that all the radio-elements possess the 528 POPULAR SCIENCE MONTHLY common constituents, the a and 8 particles. It has been found that after a certain critical velocity has been reached, the a particles all at once cease to produce any ionization, phosphorescence or photographic action. If a substance emits particles with a velocity less than this critical velocity, we should have no method at present available for detecting them. As to the enormous amount of ionization produced by radium, one can partly grasp it when one considers that an a par- ticle produces about 80,000 ions and one grm. of radium emits about 6 (10)*° a particles per second. ‘The y rays also differ in penetrating power. The y rays from radium and thorium are very much stronger than those from uranium and actinium. THE RELATIONSHIP BETWEEN VARIOUS ELEMENTS By actual experiment in the laboratory it is possible to watch the gradual formation of helium and actinium. ‘The rate of formation of helium from radium is known roughly, so that if in any rock the helium formed from radium has not been allowed to escape, a quite accurate estimation of the age of the rock can be made. Radium has also been found by Boltwood and Rutherford to grow in actinium solutions. But by investigating elements which appear together in the rocks it is possible to learn much more. In fact it was from the occurrence of helium in radioactive minerals that the brilliant predic- tion of the production of helium was made. Boltwood, Strutt and McCoy have shown that the amount of radium present in radioactive minerals always bears a constant ratio to the amount of uranium present. For every gram of uranium there is present 3.8 (10)~7 grms. of radium. From this coexistence in a constant ratio, one is justified in assuming that radium is a product of uranium. If this is true it is easy to explain the existence of radium in rocks that contain uranium. Otherwise, on account of the short period of disintegra- tion of radium, it would be difficult to account for its distribution through the rocks. It has also been found that minerals of the same age contain uranium and lead in the same ratio, so that it seems quite certain that lead is a disintegrated product resulting from radium. Recent experiments by Rutherford seem to indicate, however, that actinium is not a direct product of uranium, as radium is considered to be. The existence together of various other elements has been used as an argument for their relationship. At present, however, the evi- dences are very meager and often conflicting. This field of experi- ment is one that promises very important results, however. Tue DISTRIBUTION OF RADIUM Considerable work has recently been done by the Hon. R. J. Strutt upon the amount of radium contained in various kinds of rocks widely ——_—_ ~— RADIOACTIVITY 529 distributed over the earth. As this kind of work will probably have considerable geological importance, a few of Strutt’s results will be given. A solution of a definite amount of the rock was stored until the equilibrium amount of radium emanation had accumulated. Now, as we have seen that uranium and radium occur in a constant pro- portion, it is possible to use a mineral of known uranium content and to compare the amount of radium emanation emitted by this and that emitted by the given rock. Following are some of Strutt’s results, using 3.8 (10)-* grms. of radium as accompanying 1 gram of uranium in uranium minerals. TaBLeE II. RADIUM CONTENT oF IGNEOUS RocKs Name Hock toctity | Density | Ratlumares, | Pala ze Granite Rhodesia 2.63 | 491 (10)-? | 12.9 (10)-2 a Cornwall 2.62 4.80 (10)-* | 12:6 (10)-" Blue grouud Kimberly 3.06 is (10j}—2 ) -6:29:/(410)-4 Leucite basanite Vesuvius 2.72 Lik (10) |) 466610) -2 Hornblende granite | Assouan, Egypt 2.64 1.26. (10)-™"| °3:32,C10)-= Hornblende diorite | Heidelberg 2.89 ¥.02" (10)+7"|" 2.94 (10)-2 Augite syenite Norway 2 73 -95 (10)-*} 2.60 (10) Granite Isle of Rum 2.61 pon, AAD) a4 OT (10) Basalt Greenland 3.01 son (10)-2 -94 (10)-# Native iron a6 -218 (10) -# Meteoric iron Thunda Undetectable i eS Virginia ae De ok: Santa Catarina oe RADIUM CONTENT OF SOME SEDIMENTARY Rocks Radium Content per Name of Rock Locality Gram in Grams Oolite Bath 3.00 (10)-? Marble East Lothian £99) ((10)=4 Roofing slate Wales 1327 (10)=> Gault clay Cambridge 5:09) G10)=2 Clay Essex 89 (10)-? Red chalk Hunstanton 57 (10) White marble India 228) LO) a= Chalk Cambridgeshire 2405 (10) 54 Deposit from Bath hot springs 425 (10)-? Cambridge tap water .400 (10)-? Sea salt AiW@ (i) Boiler crust, Cambridge .040 (10)-? Sea salt Omaha .0204 (10)- Sea water Atlantic .003 (10)-? These two tables give but a few of the analyses of Strutt. They show the very wide distribution of radium both in the igneous and in the sedimentary rocks. The average radium content of the rocks exam- ined by Strutt is high, whereas that of sea salt is quite small. Strutt finds that the radium content necessary to maintain the earth at a constant temperature is about 1.75 (10)-** grms. of radium per cubic centimeter of the earth. This is very much less than the lowest radium content of any of the rocks. For this reason he believes that VOL. LXxI.—34. 530 POPULAR SCIENCE MONTHLY radium is to be found only in an outer crust of the earth, at least if the earth is becoming cooler. In making these calculations, the effect of thorium and uranium and the possible radioactivity of ordinary materials is not taken into account. If the heating effect of ordinary materials is of the same order of magnitude as is to be expected from the ionization they produce, the earth’s temperature gradient would be many times larger than that observed. Strutt believes this to be an argument that ordinary matter possesses no genuine radioactivity of its own. CC. B. Thwing claims, however, that he has been able to find a temperature gradient in small cylinders of the various metals and rocks. At present nothing very definite can be said as to the heating effect of the radioactivity of substances upon the temperature of the earth. Having considered the radioactivity of the various rocks, we will now take up the atmosphere. RADIOACTIVITY OF THE ATMOSPHERE It was found after considerable work had been done on ionization that the free air is very considerably ionized. Now in the table of the transformation products of the radio-elements, it will be noticed that several products have the property of condensing on a highly negatively-charged wire. Elster and Geitel and others tried exposing such a wire in the open air and found that there was an active deposit vf radium and thorium formed on the wire. The amount of active deposit was found to depend upon the locality and the weather condi- tions. If the air had been undisturbed for some time as the air in caves and cellars, it was found that the active deposit formed was much greater. Air sucked through the pores of the ground was found to be very active. From these results, Elster and Geitel concluded that the radium and thorium emanations (which behave like gases) ooze up through the ground and percolating waters and have their origin in the radium and thorium in the soil. The emanation then breaks up into the various products as given in Table I. The emana- tion in this course gives rise to positively charged carriers, which are driven to a negatively charged wire by the electric field. It is to the emanation and its products that the ionization of the air is attributed. Thorium C and radium C give off y rays, and, as these are very pene- trating, they would be the source of a very penetrating radiation, and this latter has been discovered several years ago. The ionization in a closed electroscope is measured, and thick lead screens are then placed around the electroscope, and the ionization is again measured. The ionization in the latter case is found to be very considerably de- creased, the penetrating radiation having been largely cut off. Whether all the penetrating radiation can be explained as due to radium C and thorium C will be taken up later. RADIOACTIVITY Ron As the potential of the earth is negative compared with that of the air, the active deposit is dragged down to the surface of the ground and upon the leaves and branches of plants and trees. A hill or mountain top concentrates the earth’s field and so receives a greater amount of the active deposit. In this way Elster and Geitel explain the greater ionization on hills and mountains. Experiments show that the active deposit tends to collect on dust particles. These dust particles serve as nuclei for the condensation of raindrops and snow- flakes. The deposit resulting from evaporating rain and snow should be very radioactive. This was found to be true by Wilson and Allen. Again, a big rain or snow should carry down most of the active deposit, and as the emanation does not emit y rays, the amount of y radiation from the radioactive matter in the air should be very much decreased. The penetrating radiation, if it consists mainly of y rays, should then become very small. This has been found to be borne out by experi- ments made by the writer. It must be remembered that the emana- tion is insoluble in water and as this does not seem to be carried down by water or snow, the products radium C and thorium C would soon be in equilibrium again after the rain or snow. The effect of the presence of radioactive matter in the atmosphere upon ordinary phenomena is perhaps very great, though at present little is known. It has been found that deep wells and hot springs contain considerable radium. From this Elster and Geitel suggest that the curative effect of thermal springs and the physiological action of the air at high levels may be related to the large amount of radioactive matter present. ‘The presence of radioactive matter, and therefore of ionization, in the air probably plays a very important réle in the growth of plants. It has been found that vegetables grown in an atmosphere electrified positively are much above those grown in normal fields both in quantity and in quality. The ionization and nucleation produced by radioactive matter in the air are very essential for the condensation of rain and hail, and serve to explain the enormous ac- cumulation of static electricity during thunderstorms. Simpson and others have measured the activity of the air which has blown over the sea and have found it small. Now if most of the radium and thorium emanations come from the pores of the soil and underground cavities, the results obtained by the above investigators would be expected, for, as will be seen from Table II., the radium content of ocean water is very small. Eve has recently measured the ionization over the ocean and has found it to be the same as the ionization over the land, a rather unexpected result. In this state the matter rests at present. A crucial test would be to expose negatively charged wires far out in the ocean and find whether there was any active deposit and to test for the presence of a penetrating radiation. According to J. Joly, the distin- guished geologist, Eve’s results can easily be explained. Geologists have 532 POPULAR SCIENCH MONTHLY for some time made an approximate estimate of the age of the oceans by making determinations of the amount of salt which they contain. By analyzing the waters of rivers flowing into the ocean for the salt which they contain and determining the total annual outflow of all the rivers into the ocean, and supposing these constants to have been prac- tically constant during the past, it is easy to make an estimate of the approximate age of the oceans. Now if radium and uranium always exist in a constant proportion, the present radium content of the ocean would have been supplied by the rivers in a comparatively short length of time. For this and other reasons Joly believes that uranium and radium are not always to be found associated together. Now we know that radium has a short period of decay, so that it must constantly be supplied from somewhere. Joly believes that the source is at least partly outside of the earth. This radium is gradually being brought down to the surface. This would account for the ionization over the ocean and the wide distribution of radium over the earth. Elster and Geitel’s theory of the escape of the emanation from the upper layers of the soil would still hold true. If radium exists outside the earth, it would be expected that the upper layers of the earth’s atmosphere would be highly ionized by the y rays. This highly ionizing radiation would serve to explain some of the phenomena of atmospheric electricity. According to C. T. R. Wilson, the positive potential of the atmosphere is largely to be attributed to the carrying down of negative charges by raindrops and snowflakes. The upper layers of the atmosphere, being highly ionized and quite good conductors, would conduct the remaining positive charge to places of lower potential and would thus always aid in equalizing the potential of wet and dry regions. RADIOACTIVITY OF THE METALS After the discovery that several of the elements were radioactive, it was natural to ask if radioactivity was a universal property of all the elements. Madame Curie’s work showed that if the ordinary elements are radioactive at all, they must possess this property to but a very slight degree. In order to detect any possible radioactivity, it was necessary to have very sensitive instruments. It was found by Wilson and Geitel that there is a leakage of electricity through a gas in a closed vessel and that this leak could be measured very accurately by means of an electroscope. Now either the ions are produced spon- taneously in the gas, by a radiation which is capable of penetrating the sides of the electroscope or by radiations from the walls of the electro- scope itself. Rutherford, Cooke and McClennan have shown that some thirty or forty per cent. is due to a very penetrating radiation sup- posed to be the y rays emitted by the radium and thorium products in the air and ground. By using lead screens around the electroscope, they were able to decrease the rate of leak to a certain limiting value RADIOACTIVITY 533 beyond which they were unable to go, no matter how much lead was used. Strutt and others then found that for electroscopes of the same dimensions, the amount of ionization depended on the material forming the walls. For vessels of the same shape and size, lead walls gave the greatest amount of ionization, tin and iron considerably less, aluminium and glass the least of all. Strutt found that different specimens of the same metal gave a different ionization and he therefore concluded that the radioactivity of the metals was probably due to a common impurity. Patterson then tried using different gases and found that the ionization was proportional to the density. This fact is strong evidence that the ionization is not spontaneous within the gas, but is due to a radiation from the walls of the vessel. Patterson also found for the given vessel which he used (30 em. in diameter and 20 cm. long) that the current through the gas was independent of the pressure above 300 mm. of mercury and varied directly as the pressure below 80 mm. The ionization was found independent of the temperature up to 450° C. That the ionization was related to the pressure as stated above would indicate that above 300 mm. of mercury all the radiation was absorbed, whereas below 80 mm. it was not all absorbed. The most complete work on the radiations from the metals and their salts has been done by Campbell. In experiments on the radia- tions from the metals, Campbell used an aluminium-lined box. Inside this was a wire gauze cage containing a gauze electrode. The cage would allow the admission of radiations, but not of ions. Then by pla- cing two sheets of metal so as to radiate into the cage, one sheet being arranged to slide back and forth, it was possible to measure the ioniza- tion produced at different distances of this sliding sheet from the cage. The curve which was plotted from the values of the ionization and the distances gave the values of various constants from which it was pos- sible to determine the values given in a table which is shortly to follow. Before considering this table it is needful to say that the curves in- dicated (when the external penetrating radiation was cut off): (1) an easily absorbable radiation from the sheets of metal placed aside of the cage; (2) a more penetrating radiation from the same; and (3) the radiation from the gauze cage. When the external penetrating radiation was not screened off, the curves showed in addition an ioniza- tion due to (4) the external pentrating radiation; (5) to the penetra- ting radiation excited by it; and (6) to the easily absorbable radiation also produced. In the table, a is Bragg’s constant for the intrinsic absorbable radiations, a constant which corresponds to the range of the a particles of the radioactive elements; s is the number of ions pro- duced per second by the intrinsic absorbable radiation from one square centimeter of the surface of the metal, when totally absorbed in air; dX is the coefficient of absorption of the easily absorbable secondary radiation; s’ is the number of ions produced per cubic centimeter by 534 POPULAR SCIENCE MONTHLY the easily absorbable secondary radiation from one square centimeter of the metal under the circumstances of the experiment; V is the number of ions produced in 1 cc. by the intrinsic penetrating radiation from the whole box and lead screen; V’ is the number of ions produced in 1 c.c. by the external radiation and the penetrating radiation excited by it. Tanne (i. Metal s x | V WA a A Lead (1) 270 0 10.2 14.2 1 ££. %(2) 260 0 13.4 26.3 12 Copper (1) 103 160 22, 22 9 6 cers 6-5) 110 Q1 8.1 27.4 9 25 Aluminium 117 0 14.8 if 6 0 Tin 144 156 aii! 18.9 9 » Silver 146 146 25.5 17.0 8.5 9 Platinum 74 411 ieo 14.1 12 4 Gold 78 169 10.4 16.8 10 .6 Zine 72 51 15.4 16.8 10 5 Tron 119 124 12.3 10.5 13 eo d is the coefficient of absorption of the easily absorbable secondary radiation. By using a strong electrostatic field, an attempt was made to deter- mine whether the ionizing agents for the intrinsic absorbable radiation were charged. These radiations were found certainly not to be of the B type and very probably to have a nature similar to that of the a rays. No radium emanation was able to be detected from the lead used. From the constancy of the value of s for the different specimens of the same metal and on account of the variation in the values of a for the different metals, Campbell rightly concludes that there seems to be no doubt but that the ordinary metals are feebly radioactive. In some cases the experimental and theoretical curves agree so well that it would seem that the radiations are homogeneous. Campbell has also investigated the radioactivity of the metals and their salts in a similar way. He finds that the emission of radiations is an atomic property and that salts prepared by totally different methods and from materials derived from different sources, produce the same ionizing effect. It is only the metal that produces any measurable ionizing effect. The following are some of the results: | | | Ree eater iaasiices 7% | arbitrary Units Lead 9.3 Tin 4.4 Lead sulphate (1) 6.8 Tin sulphide (1) 4.1 «c a ( 2) 7 «6 “ (2) 3.9 ce ce (3) 7 hay? “ ae (3) 3.8 Lead monoxide 8.2 | Bismuth 6 Mercury 9 Bismuth oxide 5.7 Mercurous oxide 5 Potassium sulphate 70 Mercuric oxide 6 * RADIOACTIVITY 535 : = a | —s | Tay h Substance fuse | se | Pogue ole mee Potassium sulphate (1) 44.7 4s9 | 1,090 | 2920 LE ss (2) 5 471 1,050 fb 215 Potassium chloride (1) 52.1 495 951 |. 135 “cc a3 (2 ) “cc “ce | ce 139 Potassium iodide It) 255 276 1 fS0 oi ece Potassium nitrate 38.6 388 | = 1,005 | 498 Potassium sulphate (from wood) 44.7 474 | 1,060 Orthodase 16.5 201 he e220 | Rubidium alum 16.6 128 768 The use of numerals after the name of the substance is to indicate that the substance was made by a distinct method of analysis. It will be noticed that the ionization from potassium and rubid- ium is very large compared with that from the other metals. It was found that the penetrating power of the potassium and rubidium radiations was also quite large. A given sample of a potassium salt gave the following results: Number of Sheets of Foil Ionization Decrease 0 f 467 1 361 106 Pe 299 62 3 265 34 4 240 25 It will be seen that the rays are very heterogeneous and vary in penetration from that of the very penetrating B rays of uranium down- ward. Sodium, lithium and ammonium salts showed no more activity than zinc. The rays from rubidium were found less penetrating than those from potassium. The activity of uranium is about a thousand times that of potassium. Photographs were also taken by making use of the rays from potassium and rubidium. Campbell’s results are in consonance with the experiments made some time ago by J. J. Thomson. Thomson showed that rubidium and potassium emit negatively charged particles which were deflected by an electrostatic field in the same way as the ordinary corpuscles. CoNCLUSION In summing up we find that: 1. Some of the elements, as radium and thorium, are intensely radioactive. 2. Radium is very widely distributed through the rocks of the earth, and in radioactive minerals is found to exist in a constant proportion with uranium. 3. Radium and its products are also to be found in the air and play an important role in atmospheric phenomena. 4, The ordinary metals are slightly radioactive, emitting radiations that seem very much like the a radiation from the radio-elements. 5. Potassium and rubidium emit radiations similar to the f rays. 536 POPULAR SCIENCE MONTHLY THE INFLUENCE OF DIET ON ENDURANCE AND GENERAL EFFICIENCY By PRorressoR RUSSELL H. CHITTENDEN SHEFFIELD SCIENTIFIC SCHOOL OF YALE UNIVERSITY A Vcgtegr ace a study of the physiological needs of the body for food! has indicated that the real requirements of the sys- tem, especially for proteid foods, are far below the amounts called for by existing dietary standards, and still farther below the customary habits of the majority of mankind. The ability of the body to main- tain a condition of physiological equilibrium, with a true nitrogen balance, ete., on a relatively small amount of nitrogenous food, would seemingly imply that the large surplus so generally consumed consti- tutes an entirely uncalled-for drain upon the system, as well as upon the pocket of the individual, and without any compensatory gain. In our experimental study of this question, observations on many individuals have extended over such long periods of time that there is apparently perfect safety in the conclusion that the new dietary stand- ards which aim to conform to the true needs of the body are perfectly adapted to maintain health, strength and vigor indefinitely. Further, the many data obtained in our experimental studies, reinforced by a multitude of personal experiences from all over the world, communi- cated to the writer, all lead to the view that there is great personal gain in the acquisition of dietary habits that tend toward moderation and simplicity. Renewed health, increased vigor, greater freedom from minor ailments, ete., are so frequently reported as the outcome of tem- perance in diet, that we are forced to the conclusion that the surplus of proteid food so commonly consumed—amounts far beyond what the physiological necessities of the body demand—is wholly unphysiological and in the long run detrimental to the best interests of the individual. There is seemingly sound philosophy in so changing the customs and habits of our daily life that they will conform more or less closely to our present understanding of the physiological requirements of the body. It is certainly not presumptuous to assume that physiological ex- perimentation can tell us definitely and concisely how much and what kinds of food are needed to supply the daily waste of tissue and to make good the loss of energy incidental to varying degrees of bodily +See Chittenden: “ Physiological Economy in Nutrition ” and “The Nutri- tion of Man,” Frederick A. Stokes Co., New York. THE INFLUENCE OF DIET ON ENDURANCE _— 537 activity. This we have sought to ascertain by our studies of the past five years, and confidence in our results is augmented by the fact that when living on a lower level of proteid consumption bodily strength and endurance are unquestionably increased; muscular fatigue and soreness as concomitants of severe or prolonged muscular effort di- minish or are wholly wanting; thus raising the suggestion that under true physiological conditions the muscles of the body are capable of more prolonged effort, and with greater freedom from disagreeable after-effects than when the system is charged with an excess of ni- trogenous and other waste incidental to large intakes of proteid food. In other words, consumption of proteid food in closer harmony with the true needs of the body is accompanied by a smoother and more efficient working of the bodily machinery; less friction and better results follow a daily diet in which excess is avoided and the intake made to correspond more closely with physiological requirements. Those who are skeptical of the real value of a relatively low intake of proteid food frequently acquiesce in the general statement that as a physiological experiment it may be quite true that equilibrium, physical vigor, efficiency, etc., can be maintained by a smaller amount of pro- teid food, but they are inclined to the view that in the long run more abundant supplies of nutriment will be demanded in harmony with the ordinary customs of mankind. This is a reasonable objection, and one that time only can answer. It is quite possible—though not very probable—that an experiment of several years’ duration even may fail to show certain deleterious effects which eventually may manifest them- selves, assuming that the body does actually need more proteid food than our experimental results imply. This may be a purely theoretical objection, but it is one that is deserving of some consideration, since it is unquestionably true that there are many factors in the broad subject of nutrition not yet fully understood, and there are many phases of proteid metabolism not wholly clear. So far as any experimental evidence is concerned, however, there is nothing, in the writer’s opinion, that can be construed as giving weight to this objection. Neither are there any observations bearing on the customs or habits of peoples or communities that can be adduced in favor of possible danger to the individual from a continued intake of proteid food in harmony with our experimental data; certainly none that is not equally susceptible of plausible explanation on some other ground. As has been stated in another place,” a daily intake of 60 grams, or two ounces, of proteid is quite sufficient to meet the needs of a man of 70 kilograms body-weight, and this without increasing unduly the amount of non-nitrogenous food. In fact, for a man of the above weight doing an ordinary amount of work, the total calorific value of 2“ The Nutrition of Man,” p. 272. 538 POPULAR SCIENCE MONTHLY the daily food need not exceed 2,800 calories. As compared with the ordinary statements of the body’s needs, this means a saving of one half in the amount of proteid food and about one fifth in the amount of non-nitrogenous food daily. That these smaller amounts of food are quite sufficient to meet the needs of the body is indicated by the condition of the subjects after many months of living at these lower levels. Especially noticeable, because at that time wholly unexpected, was the decided gain in bodily strength and endurance manifested by all the subjects of experiment. This gain was spoken of as gain in “total strength,’ but the element of endurance was incorporated therein, since the final product? was a compound of the dynamometer tests of individual muscles and the number of times the individual could pull up and push up his body on the parallel bars. The natural interpretation of the results obtained was that the increased muscular efficiency was a direct or indirect result of the lowered proteid metab- olism of the body. In other words, it might be reasoned that the smaller consumption of proteid food was a nearer approach to normal conditions, and as a result there was manifested an increased muscular efficiency. However this may be, bodily strength and endurance were certainly increased, and the question naturally arises, will this improved state of the body continue for any length of time under such conditions of diet? In other words, may we expect to find an improved physical condition of the body in following habits of life which seemingly accord more closely with true physiological needs, avoiding that excess of food intake that the common practises of mankind sanction? One of the first subjects experimented with by the writer was Horace Fletcher, who in 1903 spent several months in our laboratory* and was at the same time carefully tested by Dr. William G. Anderson, director of the Yale Gymnasium, as to his physical condition. For some five years Mr. Fletcher had practised a certain degree of absti- nence in the taking of food with, as he believed, important economy, t. e., great gain in bodily and mental vigor and with marked improve- ment in his general health. He found that under his new method of living he was possessed of a peculiar fitness for work and with freedom from the ordinary fatigue incidental to extra physical exertion. In the laboratory observations made at that time, it was found that he was not metabolizing more than fifty grams of proteid per day, while at the same time his body was essentially in a condition of nitrogen equilibrium. Dr. Anderson, as the result of his observations on Mr. Fletcher, concluded that, considering his age, he had never seen an individual able to work in the gymnasium with fewer noticeable bad results, since he was able to do the work of trained athletes and not *“ Physiological Economy in Nutrition,” p. 259. *See Poputar Science Monraty, June, 1903, p. 127. THE INFLUENCE OF DIET ON ENDURANCE _ 539 give marked evidences of over-exertion, although not in training. At the time these experiments were tried Mr. Fletcher weighed one hun- dred and fifty-seven and a half pounds, and was in his fifty-fourth year. While, naturally, we have not been able to obtain daily records of the quantity of food taken by Mr. Fletcher during the past four years, observations made from time to time have confirmed his general state- ment that he lives essentially at this same low level of proteid metab- olism. In June, 1907, Mr. Fletcher was again at New Haven for some weeks, thus giving us an opportunity to test his rate of nitrogen ex- change and his physical condition. It was found that the amount of nitrogenous or proteid food consumed daily never exceeded sixty grams, and that his nitrogen metabolism averaged not far from seven grams per day. His body-weight was found to be one hundred and seventy- seven and a half pounds. We thus had an opportunity of testing the physical endurance of a man who has for at least nine years practised a degree of physiological economy in nutrition, which means a daily consumption of proteid food in amount less than one half that called for by the ordinary dietary standards. It would seem reasonable to suppose that if a low nitrogen intake is destined eventually to prove detrimental to the individual, some sign of such deleterious effect would manifest itself during this period of time. If, on the other hand, consumption of proteid food in harmony with the lower dietary standards which the writer is disposed to advocate on the basis of his experimental results, is beneficial to the individual, then one might expect to find a continuance of the same physical vigor noted in the earlier observations on Mr. Fletcher, in spite of the fact that at this date the subject was nearly fifty-nine years of age. Through the kindness of Dr. Anderson, of the Yale Gymnasium, Mr. Fletcher was subjected to a variety of tests, the outcome of which is best presented in the words of Dr. Anderson, as given to the writer in a report made under date of June 28, 1907. On June 11, 1907, Mr. Fletcher again visited the Yale Gymnasium and underwent a test on Professor Fisher’s dynamometer. This device is made to test the endurance of the calf muscles. (Soleus and gastrocnemius.) The sub- ject makes a dead lift of a prescribed weight as many times as possible. In order to select a definite weight the subject first ascertains his strength on the Kellogg mercurial dynamometer by one strong, steady contraction of the muscles named—and then he finds his endurance by lifting three fourths of this weight on the Fisher dynamometer as many times as possible at two- or three-second intervals. One leg only is used in the lift, and, as indicated, the right is usu- ally chosen. Mr. Fletcher’s actual strength as indicated on the Kellogg machine was not quite 400 pounds, ascertained by three trials. In his endurance test on the Fisher machine he raised 300 pounds 350 times and then did not reach the limit of his power. Previous to this time Dr. Frank Born, the medical assistant at the gymnasium, had collected data from 18 Yale students, most of whom were trained athletes or gymnasts. The average record of these men was 87.4 lifts, the extremes being 33 and 175 lifts. It will be noticed that Mr. Fletcher doubled the best record made previous to his feat and numerous subsequent tests have failed to increase the average 540 POPULAR SCIENCE MONTHLY of Mr. Fletcher’s competitors. Mr. Fletcher informs me that he has done no training nor has he taken any strenuous exercise since February, 1907. On two occasions only during the past year he reports to have done hard work in emergencies; once while following Major General Wood in the Philippines in climbing a volcanic mountain through a tropical jungle on an island near Mindanao for nine hours; and once wading through deep snow in the Hima- layan Mountains, some three miles one day and seven miles the next day, in about as many hours. This last emergency experience came through being caught in a blizzard near Murree, in northern India, at 8,500 feet elevation, on the way to the Vale of Kashmir. These two trials represented climatic extremes and Mr. Fletcher states that neither the heat nor the cold gave him discomfort, a significant fact in estimating physical condition. Before the trial on the Fisher ergograph, the subject’s pulse was normal (about 75); afterwards it ran 120 beats to the minute. Five minutes later it had fallen to 112. No later reading was taken that day. The hands did not tremble more than usual under resting conditions, as Mr. Fletcher was able to hold in either hand immediately after the test a glass brimming over with water without spilling a drop. The face was flushed, perspiration moderate, heart action regular and control of the right foot and leg used in the test normal immediately following the feat. I consider this a remarkable showing for a man in his fifty-ninth year, 5 feet 614 inches in height, weighing 17744 pounds and not in training. In order to make a more thorough test of Mr. Fletcher’s powers of endur- ance under varying degrees of physical strain he underwent on the 17th, 18th, - 19th, 21st and 22d of June, 1907, the following: 1. Going up 32 steps of a spiral stairway at natural speed. 2. While in the lying position, raising the trunk to a vertical position a prescribed number of times and continuing as many more times, at will, as agreeable. 3. While standing with arms upraised to the full bending forward and downward, touching the floor with the fingers without bending the knees. 4. While holding two 25-pound iron dumb-bells, first flexing the elbows and then raising the weights to arm’s length above the head. 5. A daily test on the Fisher dynamometer, not for endurance, but for meas- uring pulse acceleration. It became necessary to make a change in the character of the movements on the final day of the test on account of the chafed condition of the subject’s skin, and we added: 6. “ Running in place,’ with knee lifting forward and upwards to the ex- treme possible height. 7. Rapid extension of the arms upward, outward and downward. 8. Same as 7, but holding one-pound wooden bells in each hand. Pulse readings were taken before and after each test, and in the following report the average pulse for each exercise is given: After quickly climbing 32 spiral steps, five trials, the average pulse was 115.2 beats to the minute. After trunk raising, five trials, 50, 60, 70, 100 and 100 times; the latter two trials in one day, five hours apart; average pulse, 115.2 beats. After trunk bending, five trials, 60, 100, 150, 200 and 300 times; the latter two trials in one day, five hours apart; average pulse, 150 beats. After lifting the 25-pound bells, five trials, 5, 5, 10, 10 and 10 times; average pulse, 138 beats. After tests on the Fisher dynamometer, four trials, 50, 60, 60 and 60 times; average pulse, 120 beats. After rapid arm work for three minutes, average pulse, 156 beats. After similar work holding wooden bells (two minutes), average pulse, 156 beats. After running in place as rapidly and as strenuously as possible for one minute, average pulse, 144 beats. After each test the respiration and heart action, while active, were healthy, and, under such conditions, normal. There was not the slightest evidence of soreness, stiffness or muscular fatigue either during or after the six days of the trials. The chafing of the skin was due to the rubbing of the “tights ” worn while lying down and raising the trunk. Mr. Fletcher made no apparent effort to conceal any evidences of strain or overwork and did not show any. He informs me that he felt no dis- tress whatever at any time. THE INFLUENCE OF DIET ON ENDURANCE 541 During the thirty-five years of my own experience in physical training and teaching I have never tested a man who equalled this record. The latter tests, given in June, 1907, were more taxing than those given in 1903, but Mr. Fletcher underwent the trials with more apparent ease than he did four years ago. What seems to me to be the most remarkable feature of Mr. Fletcher’s tests is that a man nearing sixty years of age should show progressive improvement of mus- cular quality merely as the result of dietetic care and with no systematic physical training. Such a record of endurance as this, especially when made by a man fifty-nine years of age, can hardly fail to attract our attention. Further, when it is remembered that the subject of this test was not in training, the question naturally arises as to the cause of this phenomenal show- ing. Why a man of fifty-nine years of age, without training, should be able to far surpass the record for endurance made by young and vigorous athletes can only be surmised, but it certainly seems plausible to assume that the explanation is to be found in the careful dietary habits which this man has followed for the past nine years. In any event, it is fair to suppose that habits of life, leading to a relatively small intake of nitrogenous food, are not inimical to a general condi- tion of physical efficiency and muscular endurance. We may go even farther and assume that the remarkable showing made by this subject is due directly to his temperate dietary habits. Mr. Fletcher would doubtless lay special stress upon his habit of thorough mastication and of abstaining from eating until the appetite strongly demanded food. This phase of the subject we need not discuss here. The main point is that this particular subject has during these nine years made a practise of consuming daily a quantity of proteid food not more than one half that demanded by ordinary dietary standards. In other words, his habits of living have been essentially in accord with the conclusions arrived at by our experimental studies bearing on the requirements of the body for proteid food. We see in these results possible progressive muscular recuperation after middle life by means of diet alone. If a man by careful atten- tion to his diet can show progressive gain in endurance and general efficiency after fifty without systematic training, it is a fact well worth knowing. In any event, the data afforded by this particular subject corroborate in striking fashion the conclusions arrived at by laboratory experimentation, and tend to confirm the view that there is perfect safety and probable gain to the body in a system of dietetics which approximates to true physiological requirements and avoids undue excess. 542 POPULAR SCIENCE MONTHLY JEAN LOUIS RUDOLPHE AGASSIZ? By PROFEssOR EDWARD S. MORSE PEABODY MUSEUM, SALEM, MASS, EAN LOUIS RUDOLPHE AGASSIZ was born in Motier, Switzerland, May 28, 1807, and died in Cambridge, December 14, 1873. He was one of the great naturalists of the world, a student of Cuvier, beloved by Humboldt, counting every distinguished name in science as an admirer and idolized by his associates. At the age of twenty-four he had an international reputation. He had conferred upon him many degrees, one of which was the doctor’s degree of medi- cine and surgery, in the preparation for which Von Siebold says he prepared seventy-four theses on anatomical, pathological, surgical and obstetrical subjects, also investigations in materia medica, medicina forensis and the relation of botany to these topics. He studied at the medical school at Zurich, the University of Heidelberg and at the University of Munich. Investigations of the widest diversity in natural science were embodied in 415 papers, memoirs and books, many in quarto and folio, representing nearly ten thousand pages and a thousand plates. Besides his profound attainments as a naturalist he was equally remarkable as a teacher and most eloquent as a lecturer. Always en- thusiastic in his own work, he had the further power of inspiring this enthusiasm in others. At the age of twenty-three, in a letter to his brother, he said: “ What troubles me is that the thing I most desire seems to me, at least for the present, farthest from my reach, namely, the direction of a great museum.” He little foresaw that thirty-one years from that time he would see the inauguration with pomp and circumstance of the great museum at Cambridge of which he was the originator and director. Nor could he have anticipated that his son, profiting by his engineering and geological studies in the Lawrence Scientific School with which this museum was affiliated, should use that knowledge in securing the fortune by which the museum has expanded far beyond the most ardent imagination of its founder. In the very prime of his manhood, in the very height of his fame, 1Read at the unveiling of the Agassiz tablet at the Hall of Fame, New York, May 30, 1907. In the preparation of this brief address I am indebted to Mrs. Elizabeth Agassiz’s charming tribute to her husband in her “ Life and Letters of Louis Agassiz” and to Marcou’s “Life of Agassiz.” JEAN LOUIS RUDOLPHE AGASSIZ 543 he came to our country, and by his enthusiasm, his eloquence, his winning and democratic ways, he won the hearts of all, and from his advent here may be dated the wide-spread love of natural science among the masses. Agassiz’s contributions as a naturalist covered the entire range of the animal kingdom. A study of his bibliography exhibits communica- tions, papers and memoirs on every Cuvierian class. A further study of this bibliography indicates that, as a young man, he grappled with some of the most difficult groups of the animal kingdom. ‘The fishes had been one of the most distracting divisions of the higher animals. The limitations of their genera, the homologies of their bony structure, had daunted most zoologists who confined their work to the description of species. Agassiz’s first important work was the “ Fishes of Brazil,” based upon material brought home by Martius and Spix. ‘This was done at the age of twenty-two. The work was written in Latin, dedi- eated to Cuvier, and illustrated with a folio of ninety plates. At the age of twenty-three he issued his prospectus of the natural history of the fresh-water fishes of central Europe, which was completed twelve years after, accompanied by a folio atlas of forty-one colored plates. Difficult as was this task, he wrestled with a still more difficult one, namely, the “ Fossil Fishes,’ and in nine years had completed this remarkable work in five quarto volumes with 400 colored folio plates. This publication alone placed him in the front rank of naturalists. An eminent geologist has written in regard to this work that Agassiz’s power of classifying fossils and his success in reducing to order thou- sands of specimens of fishes, a great many of which were perfect puzzles to every one, was simply marvelous. The echinoderms, with their complicated covering of curious plates, spines and minute appendages, formed another most difficult group for study. From the number of fossil species in the rocks in his neighborhood Agassiz was led to a minute examination of both living and fossil forms which culminated in his great monograph of echinoderms with many plates. The prodigious extent and character of the work done before he was thirty years old may be appreciated when it is stated that on a meager salary of $400 a year he established a lithographic press at Neuchatel, he employed two skilful artists, published a number of parts of his monograph of the echinoderms, several parts of his fossil fishes, made a profound study of the glacial phenomena of the Alps as well as of the geology and paleontology of the Jura and superadded to all this work the monographing of two molluscan genera, Mya and Trigonia. Ernest Favre, in his biographical notice of Agassiz, says, in regard to this period of his life, that he displayed an incredible energy, of which the history of science offers, perhaps, no other example. 544 POPULAR SCIENCE MONTHLY His original way of dealing with subjects is well illustrated in his studies of fossil bivalve mollusca. It had been customary to describe the external markings of the shell and when possible the muscular impressions within. Agassiz soon realized the importance of studying the interior contour of the shell, and forthwith proceeded, by means of casts, to bring to light the relations of these fossils with their living representatives. His maxim was to have abundant material—thou- sands of specimens, if necessary—for any proper research. In studying glaciers he literally rode on the back of one for weeks at a time. He furthermore urged his students to read all that had been written on a subject before publishing. Agassiz not only defined many new species of animals in various classes, but he was continually dwelling on the affinities and homologies among the various groups; more particularly their classification and their geographical and stratigraphical distribution. His studies in em- bryology and his familiarity with the work of Von Baer led him to recognize the general truth that the young of higher animals in their respective groups resembled the mature forms of animals lower down in the scale. From these studies he soon grasped the greater concep- tion that this principle was carried out in time as well, and that fossil animals in the early horizons of geological history resembled the embryonic or early condition of higher animals now living and hence the idea of comprehensive or prophetic types. This same broad grasp of fundamental principles was remarkably illustrated in his studies of glacial phenomena in the Alps. One of his biographers says, “ With his power of quick perception, his unmatched memory, his perspicacity, and acuteness, his way of classifying, judging and marshaling facts, Agassiz promptly learned the whole mass of irresistible arguments collected patiently during seven years by Charpentier and Venetz, and with his insatiable appetite and that faculty of assimilation which he possessed in such a wonderful degree he digested the whole doctrine of the glaciers in a few weeks,” and added a great many new and important facts. From his study of the glaciers of the Alps he soon announced his belief that the whole northern hemisphere had at one time been covered by an ice sheet. The various records of this vast sea of ice which had been interpreted by the most eminent geologists as the result of diluvial action and flowing mud he rightly attributed to the action of ice. In the face of the most strenuous and even bitter opposition he trium- phantly established the former existence of the Great Ice Age. Subse- quent studies, while modifying the limitation of the great ice sheet, have only strengthened the views of Agassiz. Agassiz’s absorbing interest in the structural relations of animals led him to define with greater accuracy the limitation of various groups. JEAN LOUIS RUDOLPHE AGASSIZ 545 As a student of the great French naturalist, Cuvier, he became an eloquent advocate of the existence in nature of four great branches of the animal kingdom. He was early convinced that branches, classes, orders, families and genera had as distinct an existence in nature as species, and his life work was to make clear and rigid their definition. His eager desire to understand the relations existing between obscure forms was expressed one day in a private talk to his pupils, when he earnestly exclaimed, “'The lamprey eel has been my puzzle and my misery for twenty years.” Not only in many technical essays, but as an eloquent teacher, he made these principles of classification so plain that vast audiences were able to grasp his conceptions. Those who heard his lectures on the subject will never forget the vivid way in which he impressed upon his auditors these views emphasized by graphic blackboard drawings. In his methods of study in Natural History he presented in a popular form the leading features of his belief in the systematic rela- tions of animals as embodied in his famous “ Essay on Classification.” The following quotation from his Methods of Study will indicate the ideas which were surely preparing the ground for the acceptance of the theory of evolution: Man is the crowning work of God on earth, but though so nobly endowed, we must not forget that we are the lofty children of a race whose lowest forms lie prostrate within the water, having no higher aspirations than the desire for food; and we can not understand the possible degradation and moral wretched- ness of Man, without knowing that his physical nature is rooted in all the material characteristics that belong to his type and link him even with the fish. The moral and intellectual gifts that distinguish him from them are his to use or to abuse; he may, if he will, abjure his better nature and be Verte- brate more than Man. He may sink as low as the lowest of his type, or he may rise to a spiritual height that will make that which distinguishes him from the rest far more the controlling element of his being than that which unites him with them. P Not only by such expressions just quoted, but in other statements, he certainly prepared the way for the more prompt recognition of Darwin’s views. Inspired by the belief in the existence in nature of categories of structure, he strengthened old homologies and established many new ones. In representing the four Cuvierian branches by schematic lines, he did not draw a series of lines one above the other, or enclose each group by sharply defined brackets, but drew these lines, parallel it is true, but side by side in an ascending scale, slightly overlapping. He endeavored to indicate by such a diagram his belief, which was correct, that the higher members of a lower group were more advanced in structure than the lower members of a group next above. Thus while the vertebrates were higher as a branch than the articulates, the highest class of the articulates, the insects, were higher in structure than many VOL. LXxI.—35. 546 POPULAR SCIENCE MONTHLY of the lowest vertebrates. In this way he broke up the idea that the animal kingdom formed a continuous ladder in creation, from the lowest form to man. This was an important approach to a phylo- genetic diagram, for it was readily seen that the lower forms in each great division had closer affinities with each other than existed among the higher members. In other words, that his schematic lines should not be made parallel, but should converge below—a genealogical tree in fact. His generalized or prophetic types lend overwhelming sup- port to this conclusion. It has been repeatedly said, and with truth, that Agassiz’s teachings paved the way for the prompt acceptance of the theory of evolution— first, because he familiarized the great public with a structural knowl- edge of the animal kingdom and the affinities existing between the different groups, and, second, because he demonstrated the recapitula- tion theory of Von Baer, and added the great conception that the history of the animal kingdom from the earliest geological horizons added further proof of these principles. Agassiz came to an environ- ment well fitted to encourage him. He came to an intellectual center famous for its leadership in science and letters, but the hearty recep- tion accorded him in widely separated regions leads to the conviction that had he settled anywhere in the Country he would have inspired the same enthusiasm and induced hard-headed legislators everywhere to have voted large appropriations, and private citizens to contribute generous sums. It required only his touch to bring into recognition names among us that had before his magic influence been known only in limited circles. Men of the caliber of those of 1846 are a thousand times more widely known to-day, not because of the changed character of the public press, which celebrates with equal prominence and im- partiality girl graduates of a public school and men who have revolu- tionized the world by their inventions, but becouse he made us appre- ciate the worth of an investigator. Our nation has always believed in education and public schools, and hence has universally approved of high endowments for educational purposes. His great plea and one that had its effect on the legislators was that the museum was an educa- tional institution, that it was to be opened every day free to the public and that it was a sound investment, though its dividends were wholly intellectual. .A few personal reminiscences may be of interest at this point. In the early part of the civil war, one of our class enlisted and received an appointment as an officer of the line—the rest of us bought a fine sword and presented it to him. On showing the sword to Agassiz, he instantly threw himself into the attitude of a fencer and became absorbed in thrust and parry, utterly unconscious of our amaze- ment at his earnestness and skill. We learned afterwards that as a student at Munich he had not only fought a number of student duels JHAN LOUIS RUDOLPHE AGASSIZ 547 in which he was always the victor, but on one occasion he had chal- lenged a whole class, whereupon the best swordsman was selected to meet him, when he insisted that he had really challenged every member of the class to fight. After four had crossed swords with him and been vanquished the remainder were quite ready to retire. Agassiz with all his genius had no capacity for business and, as he admitted, was incapable of doing a simple sum in addition; nevertheless, he plunged into investigations which to carry out involved the expendi- ture of large sums of money. Mrs. Agassiz in the charming tribute to her distinguished husband says: He was frugal in his personal habits. At this very time, when he was keep- ing two or three artists on his slender means, he made his own breakfast in his room and dined for a few cents a day at the cheapest eating houses. But where science was concerned the only economy recognized, either in youth or old age, was that of an expenditure as bold as it was carefully considered. While expressing his great appreciation of the many honors given him by distinguished societies, he seemed to be indifferent to the certificates of these honors. As an illustration of this indifference I may cite an experience that a few of us had with an enormous mass of pamphlets which were unpacked and which Agassiz asked us to classify and arrange by their respective subjects. Intermixed with these pamphlets were numerous diplomas, some of them badly wrinkled, attesting to his election as associate or honorary member of great societies and academies, university degrees, and, if I remember rightly, medals of honor also. Very few are aware of the profound influence Agassiz’s devotion to his work and his enthusiasm had on the character of Harvard Col- lege. To apply an expression of Froude, he came in to this staid college community like a meteor out of the clear sky. One day as he crossed the college campus I drew a sketch of him: it contradicts every custom and tradition of the Harvard professor since the foundation of the college in 1638. On his head a soft hat, in his pockets his hands, in his mouth a cigar! President Eliot, in his address at the Agassiz commemorative meeting of the Cambridge Historical Society, said that Agassiz’s ability in securing from hard-fisted members of the General Court large appropriations for his museum, excited the envy of other departmental chiefs. Yet in obtaining these large sums from the legislature, and from private citizens as well, he finally provoked the habit of liberal giving to the college as a whole. Thus the college grew into a university, and the inception of this growth dates from the advent of Agassiz. His advice was followed in shaping the work of the Smithsonian Institution. A similar influence must be accredited to him in enlarging the work of the United States Coast and Geodetic Survey. Professor Bache, then superintendent, was an intimate friend 548 POPULAR SCIENCE MONTHLY of Agassiz, and the broadening views of Agassiz on the work of this important branch of the national government was marked. The Amer- ican Association for the Advancement of Science is indebted to Agassiz for the remodeling of the old Society of Geologists and Naturalists along the line of the British Association, of which he had long been a member. He became president of the association in 1851. Agassiz, Bache and Henry were the leading spirits in originating the National Academy of Sciences. The character of the man is indicated by the fact that the highest authorities in art, science and literature were im- mediately drawn to him and found in him a true friend and a charm- ing companion. The students associated with Agassiz at the dedication of the museum in Cambridge with few exceptions became heads of many of the great museums of the country. Professor Hyatt was, at the time of his death, custodian of the Boston Society of Natural History. Dr. Scudder had preceded him in the same office. Professor Shaler continued at Harvard as professor of geology and became dean of the Lawrence Scientific School. Pro- fessor Putnam, one of the originators of the Peabody Academy of Sci- ence in Salem, and for years director of its museum, is now director of the Peabody Museum at Cambridge. Professor Verrill has been pro- fessor of zoology at Yale since his graduation and is director of the museum at New Haven. Professor Packard, for some years director of the Peabody Museum at Salem, was at the time of his death, pro- fessor of zoology at Brown University. Professor Bickmore was closely identified with the inception of the American Museum of Natural History in New York, was its first director and continued in the office for many years, and the writer has for twenty-seven years been director of the Peabody Museum at Salem. This record is certainly a credit to the great teacher whose pupils adhered to the initial impulse imparted to them by their master. At the age of twenty-two, in a letter to his father, he wrote: I wish it may be said of Louis Agassiz that he was the first naturalist of his time, a good citizen, and a good son, beloved by those that knew him. I feel within myself the strength of a whole generation to work toward this end, and I will reach it if the means are not wanting. This boyish prophecy was fully established as attested by the glorious records of his life. Note To THE Eprtor: In view of the distracting state of zoological nomen- clature at the present time with the habit of regarding the slightest deviation in structure as of generic value with the result that nearly every species has a separate generic name, it may be regarded as a misfortune that Agassiz could not have established on a sure and enduring foundation his various categories of classification. In a conventional manner it would be profitable to adopt his definitions, even if the groups have no real existence in nature. Only in this JHAN LOUIS RUDOLPHE AGASSIZ 549 way can relief be secured from a condition which is confusing and exasperating. As an illustration of Agassiz’s firm adherence to his principles of classifi- cation so clearly elaborated in his famous essay on the subject, I may be excused for giving a letter written to me a few days after I had explained to him my views regarding the systematic position of the Braciopoda: Your statements of last Saturday haunt me and I can not rest before I have seen more of your facts concerning the Anneliden affinities of the brachio- pods. The most telling evidence in your favor? you have never yet alluded to, at least not in my presence. But I must be cautious and wait till I see and hear more of your facts. When and where can I see you again? This is not a question of structural complication. Very truly yours, L. AGASSIZ. CAMBRIDGE, Jan. 2, 1871. ?The italics are his. 550 POPULAR SCIENCE MONTHLY THE ORIGIN OF SLAVERY AMONG ANTS Dr. WILLIAM MORTON WHEELER AMERICAN MUSEUM OF NATURAL HISTORY Gi itee researches of the past few years have materially changed our views on the significance and phylogenetic origin of the so-called slave-making instincts among ants. And although the subject still involves many unsolved problems, we are now in a position to look back on its history and marvel at our too implicit confidence in certain analogies, at our neglect of the basic principles of phylogenetics, and at the inept questions we so long persisted in asking. Slavery, or dulosis, is a rare phenomenon among ants. In its pure form it is known to occur only in two of the several thousand described species, namely, in the sanguinary or blood-red slave-maker (Formica sanguinea) and the amazon (Polyergus rufescens). These species, with their various subspecies and varieties, are peculiar to the north temperate portions of Europe, Asia and America. The phenomenon was first discovered by J. Pierre Huber (1810)? and most completely described by him and by Forel (1874)? These investigators, of course, fixed their attention on the behavior of the workers. To this aspect of the subject later writers have added little of importance, and have merely fallen into a natural error of continuing in the same path as their illustrious predecessors. This was the case, for example, with Darwin® and with Wasmann, who for the past quarter of a century has been observing the slave-making ants of Europe. Huber and Forel showed that the workers of F’. sanguinea and P. rufescens make period- ical forays on colonies of ants belonging to the F. fusca group, carry home the worker cocoons and larve, and permit some of these to hatch and to survive with them in the same formicary. An eminently preda- tory species thus comes to live in intimate symbiosis with workers of an alien species which are said to function as slaves, or auxiliaries. F’. sanguinea is a powerful and very plastic species which continues to exercise all the fundamental ant instincts in the presence of its slaves. It can excavate galleries in the soil, obtain its own food and bring up its own young. Polyergus, however, is abjectly dependent on its auxiliaries. It is no longer able to excavate a nest, care for its own 1“ Récherches sur les meurs des fourmis indigénes,” Paris et Genéve, 1810. 2“ Ves Fourmis de la Suisse,” Ziirich, 1874. *“ On the Origin of Species by Means of Natural Selection,” third edition, London, John Murray, 1861, p. 244. THE ORIGIN OF SLAVERY AMONG ANTS 551 offspring, or even to take food, except from the tongues of the alien workers. It is therefore properly considered as representing a more advanced stage of parasitism than sanguinea. A few species belonging to the Myrmicine genera Tomognathus and Strongylognathus seem to possess analogous instincts, but too little is known of their habits to enable us to make very definite statements concerning them. It was, of course, impossible to do more than speculate on the phylogeny of the slave-making instincts of sanguinea and Polyergus without a knowledge of the ontogenetic source and development of these instincts, and as these are social activities, that is, carried out simul- taneously by a number of cooperating organisms, it was necessary to learn something about the origin and development of the ant colony as a unit. The bearing on the origin of slavery of the obvious and fundamental fact that there is a double ontogeny and phylogeny in social organisms, namely, one of the colony as well as one of the indi- vidual, has been appreciated only within the past few years and has completely changed the aspect of the subject. In the great majority of ant species the colony arises and develops in the following manner: The single female, or queen, after mating during her marriage flight, descends to the earth, divests herself of her wings, digs a small cell in the soil, or enters some preformed cavity under a stone or in the tissues of a plant, lays a number of eggs, feeds the resulting larve with a salivary secretion, and guards and nurses them till they mature and constitute a brood of diminutive workers. These now proceed to enlarge the nest, to forage for food, both for themselves and their mother, and to care for the succeeding broods of young. The queen thenceforth gives herself up exclusively to feeding from the tongues of her offspring and to laying eggs. The colony grows apace, the workers increasing in number, size and polymorphism with successive broods. Eventually males and virgin queens are pro- duced, though often only after the expiration of several years, when the colony may be said to have completed its ontogenetic development. It will be seen from the foregoing description that the mother queen lapses from the position of an independent organism with remarkable initiative to that of a parasite dependent on her own off- spring. ‘The latter stage in her life is of much longer duration than the former. ‘This singular ontogenetic change in the instincts of the queen should be noted, as it foreshadows an important phylogenetic development exhibiting two different modifications, one of which is excessive, the other defective, in comparison with the primitive and independent type of colony formation. The excessive, or redundant, type is known to occur only among the Attiine ants of tropical America. These raise fungi for food and are quite unable to subsist on any other substances. The queens are often very large, especially in the typical 552 POPULAR SCIENCE MONTHLY genus Atta, and not only manage to bring to maturity a brood of workers, but at the same time, as von Ihering,* Goeldi® and Jacob Huber*® have shown, have energy to spare to devote to the cultivation of a fungus garden. With the appearance of the first brood of workers, however, these queens, like those of most ants, degenerate into parasites on their own progeny. This dependent stage, which, as I have said, is of much greater duration than the independent stage in the long life of the queen, leads to a number of phylogenetic developments of the defective type. These developments first manifest themselves in the adoption of young queens by adult workers of their own species. A word of explanation will make this clear. In the colonies of many species of Formicide we find several queens—in fact, there are comparatively few ants whose adult colonies do not contain more than one of these fertile individuals. And a study of the growth of such colonies shows that the supernumerary queens are either daughters of the original single queen that founded the colony, or have been adopted from other colonies of the same species. Hence these queens are either virgins, or have been impregnated by their own brothers (adelphogamy of Forel) in the parental nest, or have been captured by the workers and carried into the nest after descending from their nuptial flight. This forci- ble adoption leads necessarily to a complete suppression of the inde- pendent stage in the life of such queens. JI have shown, in another article, that merely removing a queen ant’s wings with tweezers will at once call forth the dependent series of instincts, and the same result is undoubtedly produced when the workers deialate the virgin or just-fertilized queens of their own or other formicaries. Such queens, finding themselves surrounded by a number of accomplished nurses, the workers, proceed at once to act like old queens that have already established their colonies and brought up a brood. From this condition of facultative adoption to an obligatory adop- tion of the queen by workers of her own species is but a step. And here there are three possibilities: first, the queen can establish a colony only with the aid of workers of her own species and of the same colony. This condition seems not to obtain among ants, although it is well known in the honey-bees. Second, the queen must either be adopted by the workers of her own species of the same or another colony, or *“ Die Anlage neuer Kolonien und Pilzgiirten bei Atta sexdens,” Zool. Anz., XXI., 1898, pp. 238-245, 1 fig. ** Beobachtungen iiber die erste Anlage einer neuen Kolonie von Atta cephalotes,’” C. R. 6me Congr. Internat. Zool., Berne, 1905, pp. 457-458, and *Myrmecologische Mitteilung das Wachsen des Pilzgiirtens bei Atta cephalotes betreffend,” ibid., pp. 508-509. °* Ueber die Koloniengriindung bei Atta sexdens,”’ Biol. Centralbl., XXV., 1905, pp. 606-619, 625-635, 26 figs. THE ORIGIN OF SLAVERY AMONG ANTS 553 by workers of an alien species. This is the case with many queen ants that have lost the power of establishing colonies unaided. Third, the queen must always be adopted by an alien species. This is the case in certain ants, especially in the highly parasitic forms that have lost their worker caste. The three conditions here enumerated clearly represent the transition from parasitism of the queen on the same, to parasitism on an alien species. The latter alone is commonly regarded as true parasitism, but the former, which, of course, can occur only among social organisms or during social stages in the lives of solitary organisms, is parasitism in every essential particular. It is not con- fined to ants and other social insects, but has analogies also in human societies (trusts, “ grafters,” criminal and ecclesiastical organizations) and in human families (when the parents become senile). Ant colonies are such closed and exclusive societies that the adop- tion of strange queens, even of the same species but from alien colonies, usually meets with insuperable opposition on the part of the workers, and, as a rule, female ants have to overcome even greater hostility when they seek adoption in colonies of alien species. There are, never- theless, at least three different methods of overcoming this hostility and of effecting an adoption. These may be taken to characterize three different forms of social parasitism, as follows: 1. Temporary Social Parasitism.—I have given this name to a form of parasitism which I first observed in our American Formica difficilis var. consocians." The fertilized female of this ant, quite unable to found a colony unaided, enters a colony of F'. schaufussi var. incerta and is adopted with surprising facility. The queen of the latter spe- cies disappears, in some manner hitherto unknown, and the consocians brood is reared by the incerta workers, which, after functioning as nurses, gradually die off and leave a pure consocians colony thenceforth able to wax large and lead an independent and aggressive existence. This interesting type of parasitism occurs in most, if not all, Formice of the exsecta and rufa groups, both in America and in Europe, in a Myrmicine ant, Aphenogaster tennesseensis (parasitic on A. fulva) and in a Dolichoderine ant, Bothriomyrmex meridionalis (parasitic on Tapinoma erraticum). The females of these parasitic species tend to become greatly reduced in size (F. difficilis and several allied spe- cies: F'. dakotensis, microgyna, impexa, nepticula, suecica, etc.) or at any rate to become smaller than the queens of their host species (F. truncicola, wasmannt, oreas, ciliata, crinita, pressilabris, etc.). This is clearly an adaptation to a mode of life for which an endowment of fat and vigorous muscle is not needed, since these various queens do not have to starve for weeks or even months while bringing up a brood ™« A New Type of Social Parasitism Among Ants,” Bull. Am. Mus. Nat. Hist., XX., 1904, pp. 347-375. 554 POPULAR SCIENCE MONTHLY of workers, as in the case of most ants. Santschi has recently made the illuminating discovery that the queen Bothriomyrmezx, after entering the nest of Tapinoma, actually decapitates the queen of the host species and is adopted in her stead. In the other cases the disappearance of the host queen has not been accounted for. In the case of F. incerta it is conceivable that she may be ejected from the colony or be killed by her own workers as in the colonies of the Algerian Monomorium salamonis infested with Wheeleriella, a case to be considered presently. For the consocians type of social parasitism Santschi® has suggested the name “tutelary” parasitism, because the young of this species are reared by workers older than the parasitic queen. 2. Slavery, or Dulosis.—In this case, as I have shown for the Amer- ican F. sanguinea,® the female enters a Formica colony belonging to some variety of the Ff. fusca or schaufusst group, kills or puts to flight the workers that attack her and hastily appropriates a number of worker larvee or cocoons. ‘These she carefully guards till they hatch, when she is surrounded by a loyal brood—of an alien species, to be sure, but nevertheless both able and inclined to bring up her brood when it appears. ‘This is “pupillary” parasitism, to use Santschi’s term, since the nurses, or host ants, are younger than the parasitic queen. In this case the queen of the host species is probably put to flight at the time the sanguinea queen enters the nest. Polyergus rufescens colonies are, perhaps, founded in the same manner, but unequivocal observations on the queens of this species are still lacking. Not only is slavery, at least as manifested in sanguinea, distinguished from the other forms of social parasitism by the aggressive behavior of the queen, but also by a peculiarity of her own workers. These inherit from their mother the instinct to enter nests of the host species, and appropriate the young, but these queen instincts are intimately associated with the feeding instincts of the workers, as the latter forage in companies like so many nondulotic ants and consume many of the captured pupe. Hence the futility of all attempts, like those of Darwin and Wasmann, to understand slavery from a study of the behavior of the workers alone. Wasmann”° and Santschi believe that slavery has arisen from tem- porary parasitism, but although I myself first advanced this opinion, I have been compelled to abandon it. Wasmann found that a colony of Formica truncicola, which he has shown to be a temporary social para- *“ A Propos des Meurs Parasitiques Temporaires des Fourmis du Genre Bothriomyrmex,” Ann. Soc. Entom. France, 1906, pp. 363-392. *“ On the Founding of Colonies by Queen Ants, with Special Reference to the Parasitic and Slave-making Species,” Bull. Am. Mus. Nat. Hist., XXIL., 1906, pp. 33-105, pls. VIII.—XIV. *“ Ursprung und Entwickelung der Sklaverei bei den Ameisen,” Biol. Centralbl., XXV., 1905, pp. 117-127, 129-144, 161-169, 193-216, 256-270, 273-292. THE ORIGIN OF SLAVERY AMONG ANTS 555 site in all essential respects like F. consocians, would accept and rear fusca pupe placed in the nest. This, however, is not dulosis. In order to establish his case he would have to prove that the truncicola workers can also make periodical forays on fusca for the sake of capturing their young, and there is no more evidence that truncicola can do this than there is of similar behavior on the part of consocians. Santschi, if I understand him correctly, believes that the sanguinea colony restricts its forays to the scattered fragments of the original fusca colony from which the queen secured her first supply of auxiliaries, and that the slave-making expeditions cease when these fragments are exhausted. This assumption seems to explain the fact that old sanguinea colonies are sometimes slaveless and pure, like the adult colonies of consocians, truncicola, ete. It is, however, rendered highly improbable by the fact that both in Europe and in North America sanguinea colonies not in- frequently contain slaves of two or more different species or varieties. There is also some evidence that the same colony may have slaves of different species at different times. Professor Forel recently showed me near Morges, Switzerland, a colony of Polyergus which in 1904 contained only F. rufibarbis, but during the current year contained only F. glebaria. The similarity between old sanguinea colonies and adult colonies of temporary parasites like F. consocians, is more probably the result of two very different processes: in the former case of a languishing or lapsing of the slave-making instincts with age, in the latter, as I have shown, of a gradual extinction of the tutelary workers. 3. Permanent Social Parasitism.—This occurs in the following rare and monotypic Myrmicine ants: the European Anergates atratulus, parasitic on Tetramorium cespitum, the Tunisian Wheeleriella sant- schit, parasitic on Monomorium salomonis, the North American Hpecus pergandet (on Monomorium minutum var. minimum), Sympheidole elecebra (on Pheidole ceres) and Epipherdole inquilina (on Ph. pilifera coloradensis). All these parasites are unique among ants in lacking a worker caste, so that they are compelled to live permanently with their respective host species. Santschi*? has recently shown that the just- fecundated queen of Wheeleriella enters a Monomorium colony and is adopted by the workers, which then actually proceed to kill their own queen. ‘The same conditions probably obtain also in the other cases, as the parasitic queens are too feeble to assassinate the host queen after the manner of Bothriomyrmer. In Anergates the degeneration of the species as a result of permanent parasitism is extreme: the male is reduced to an apterous, pale and anemic, sluggish, pupa-like creature which mates in the maternal nest with its own sisters (adelphogamy), “Forel, “ Meurs des Fourmis Parasites des Genres Wheeleria et Bothri- omyrmex,” Rev. Suisse Zool., XIV., 1906, pp. 51-69; “ Nova Speco Kaj Nova Gentonomo de Formikoj,” Internacia Scienca Revus, 4° Jars, 1907, pp. 144, 145. 556 POPULAR SCIENCE MONTHLY as Forel has shown, and as I was able to observe during the past June in a large Anergates-Tetramorium colony at Vaux, Switzerland. This colony contained upwards of 1,000 winged female Anergates and sev- eral hundred males. Many of the former, placed on the craters of strange Tetramorium nests, entered these at once. The T'etramorium workers never killed these females, though they often seized them, carried them some distance from the nest and cast them away. The males, too, were not killed, although they were more forcibly and imme- diately ejected. This behavior is very suggestive, for Tetramorium workers when placed on the craters of strange colonies of their own species are at once pounced upon and killed. It is not improbable that all three of these derivative types, namely, temporary, permanent and dulotic parasitism, have developed inde- pendently out of the primitive adoptive type of colony formation, al- though the details of this development are still very obscure. I have already given my reasons for believing that slavery did not arise directly from temporary parasitism. Owing to the excessive specialization of the permanent parasites and the loss of the worker caste among these species, it is not so easy to determine whether they have arisen from temporarily parasitic or from dulotic species, for it is conceivable that they may have arisen from either, especially as there are other ants, such as Strongylognathus and Tomognathus, which combine peculiari- ties of both of these categories. The species of Strongylognathus are peculiar to the palearctic fauna and, like Anergates, live with colonies of the extremely abundant and ubiquitous Tetramorium cespitum. The workers and females have sickle-shaped mandibles like Polyergus. Two species, S. rehbinderi and S. huberi, as Forel has shown, still pos- sess vestiges of slave-making instincts. In S. testaceus, however, which is the common European form, the workers are greatly reduced in number, showing, as Forel has suggested, that this caste is on the eve of disappearing completely and thus leading to conditions like those of Anergates and the other permanent parasites. Wasmann once found a S. testaceus-Tetramorwum colony containing fertile females of both species, and during the past June Professor Forel and I found a sim- ilar colony on the Petit Saléve, near Geneva. This colony contained a fertile Tetramortwm queen. The much smaller Strongylognathus queen could not be found, but must have been present, as there were young pupe of this species in the nest. It is evident in this case, there- fore, that the parasitic and host queens manage to live side by side (allometrobiosis of Forel). This condition arose, perhaps, from slavery or temporary parasitism by a suppression on the part of the Strongylo- gnathus queen of the instinct to kill or drive away the Tetramorium queen. The genus Tomognathus is represented in northern Europe by T’. THE ORIGIN OF SLAVERY AMONG ANTS 557 sublevis (parasitic on Leptothorax acervorum) and in North America by ZT. americanus (parasitic on L. curvispinosus). The former was supposed by Adlerz!? to have only ergatoid, or worker-like females, but Viehmeyer*® has recently found winged females as well, and I had previously shown that such individuals exist in our American form. The workers of both species resemble those of Polyergus and Strongylo- gnathus in having blunted or obsolete domestic instincts. Adlerz’s observations seem to indicate that the European Tomognathus may be dulotic, but they do not altogether preclude the possibility of per- manent parasitism. As there are no observations on the behavior of the recently fecundated queens, it is impossible to decide whether the form of symbiosis exhibited by these ants arose from dulosis or from temporary parasitism or merely from a condition of xenobiosis like that of the North American Leptothorar emerson or the European Formicozenus nitidulus.** The accompanying diagram will serve to illustrate the phylogenetic relationships of the different types of colony formation among ants as formulated in the preceding paragraphs. The foregoing discussion shows very clearly that a rational ex- planation of slavery among ants can be found only by recognizing the phenomenon as a form of parasitism. This conclusion is indeed forced upon us by a comparative study of the various allied forms of social symbiosis, of the ontogeny of the ant-colony, that is, of the way in which it is started and develops, and by a study of the instincts of the queen. We myrmecologists seem to have been hampered in reaching this conclusion by a knowledge of the habits of the queen honey-bee. This insect is peculiar in being permanently and exclusively in the adoptive 2“ Myrmekologiska Studier—III., Tomognathus sublevis Mayr.,” Bih. Svensk, Vet. Akad. Handl., XXI., Afl. 4, 1896, 77 pp., 1 taf. #8“ Beitrige zur Ameisenfauna des K6nigreiches Sachsen,” Abhandl. natur- wiss. Gesell. Isis, Dresden, 1906, Heft II., pp. 55-69, Taf. III. “Since the manuscript of this article was sent to press I have received from my friend, Mr. H. Viehmeyer, of Dresden, an interesting communication, in which he describes his experiments with a number of naturally dealated and therefore presumably fecundated queens of Tomognathus sublevis, Formica sanguinea, Polyergus rufescens and F. truncicola. These queens were intro- duced into strange colonies belonging to the normal hosts of their respective species. The results obtained with F’. sanguinea and truncicola fully confirmed my observations on the American sanguinea and consocians. The queens of the typical European Polyergus rufescens were much more passive than those of the American subspecies lwcidus, used in my experiments, and were adopted on the second or third day by the slave species F. rufibarbis, but not by F. fusca till a much longer period had elapsed. An ergatoid Tomognathus queen placed in a colony of Leptothorax acervorwm “presented the same picture as san- guinea, The Leptothorax fled with their larve and then attacked the queen. During the course of the day, however, the latter managed to kill all of the Leptothoraz.” 558 POPULAR SCIENCE MONTHLY Independent Types Dependent Types Redundant Type ( Attii) t Primitive Independent => Facultative Adoption of queen Type by workers of same species (Most Formicide) Obligatory Adoption of queen by workers of same species ; Obligatory Adoption of queen by workers of another species ae Sa Temporary Social Parasitism ] Slavery, or Dulosis (Tutelary Parasitism ) (Pupillary Parasitism) £ce Permanent Social Parasitism or dependent stage, that is, she is unable to found a colony or even to exist apart from workers of her own species. And as the queen ant passes most of her life in similar dependence on her workers, namely, after establishing her colony, the earlier and more characteristic manifesta- tions of her instincts and her marvelous initiative and plasticity were either disregarded or deemed to be of little importance. Attention was concentrated on the worker slave-makers whose activities represent a combination of queen and worker instincts. Darwin was thus led to derive the slave-making from the foraging instincts, and Wasmann— well Wasmann could only keep repeating or implying that the slave- making ants made slaves, because they were endowed with a slave- making instinct—a fine modern example of Moliére’s famous opium fallacy and of the resources of scholastic methods in zoology! Was- mann supposed that F’. sanguinea is possessed of an extraordinary fondness for educating the young of the alien fusca. This was quite incomprehensible, especially as sanguinea workers are in no respect degenerate or dependent on their auxiliaries. Since I have examined many colonies of the European sanguinea, which, as a rule, rears much fewer auxiliaries than our American forms of the same species, Was- mann’s assumption seems to me to be preposterous. After the habits of our temporary parasites and especially after the behavior of the young sanguinea queens had been studied, the relations of the dulotic species to particular hosts were easily understood, for the young queens are reared by workers of a particular host species (fusca or schaufusst or some of their varieties) or at any rate meet them frequently in the parental THE ORIGIN OF SLAVERY AMONG ANTS 559 nest. What is more natural, therefore, than that the queens, when ready to establish their colonies, should seek out the nests of these same species? The sanguinea workers, too, are reared by auxiliaries of the same species, so that we are not surprised to find that it is against colonies of these that the dulotic expeditions are directed. The ab- sence of any tendency on the part of the sanguinea to rear or adopt the males and females of the host species may be due merely to a lack of familiarity of the slave-makers with these sexual forms, which in all probability are characterized by a peculiar odor unlike that of the co- specific workers. Thus is dissipated much of the mystery with which the subject of slavery has been invested, and the phenomenon becomes intelligible as a form of parasitism in which the slaves are really the host. The dulotic ants differ from the temporary and permanent parasites not only in the peculiarity of the worker instincts, but also as representing parasites with a synthetic host. In other words, the workers, when they snatch the larve and pupe from different nests of one or more varieties of F. fusca or schaufussi, are actually constructing a unitary colony out of fragments of several colonies of the host species. This peculiarity, as I have shown, arises from the inheritance of female instincts by the workers and a fusion of these with the foraging in- stincts which the worker slave-makers share with this caste in many other Formicide. Santschi expresses a similar opinion when he says: “In fine, slavery reduces itself to a form of pupillary parasitism that perpetuates and extends itself beyond the confines of the nest.” His distinction of tutelary and pupillary parasitism is useful, as it calls attention to a more active and a more passive form of this phenomenon, but the distinction should not be overworked. Although the tutelary form would seem to lead more readily to permanent social parasitism with all its attendant degenerative characters, we must remember that Polyergus, though very passive in the hands of its slaves, is extremely aggressive when plundering the nests of the host species, whereas spe- cies like F’. consocians and truncicola, though very passive in the earliest stages of colony formation, are very aggressive as soon as their colonies have emancipated themselves from the host species. The pupillary and tutelary types are, moreover, already foreshadowed as consecutive ontogenetic stages in the behavior of most ant-queens, for the inde- pendent stage in colony formation is pupillary, whereas the closing years of the queen’s life are passed in a condition of tutelary parasitism on her own offspring and species. 560 POPULAR SCIENCE MONTHLY A TRIP AROUND ICELAND. By L. P. GRATACAP AMERICAN MUSEUM OF NATURAL HISTORY III EYKJAVIK was reached; the capital of Iceland, that first old landfall for the anxious vikings, who found that when they threw over their Lares and Penates those undiscerning deities floated ashore upon this inauspicious coast. The choice has a certain pictorial value, but for commercial purposes those old gods should have exer- cised more discretion, and commercial interests are beginning to weigh overpoweringly in this arctic metropolis. To the immediate north the snow-crowned Esja shines, to the southeast the sturdy eminences of the Lénguhlitharfiall swim upward over the horizon; and still farther south the volcanic peaks of Krisuvik, where the sulphur quarries are. Then to the northwest like a titanic gleaming gem Snaefells with its ice mantle draws to its overmastering beauty every eye. But this in clear weather, and clear weather is not a very plentiful article in Ice- land. In bad weather, which is a trifle more common, the steamers may keep their imprisoned passengers for four days before they can land. The harbor is called so by a pleasant boreal fiction, which is not creditable to Icelandic hospitality. It is expected that next year an appropriation of some $400,000 will be granted permitting Mr. Smith, the official harbor surveyor of Norway, to execute his accepted plans for improving these inclement conditions. The town of Reykjavik contains about ten thousand inhabitants. It has doubled its size in five years. Stores have developed, and the caravans from the interior can return home laden with the furnishings of a modern household, not omitting wall paintings and bath-tubs. It is scattered over a hilly surface with its more pretentious buildings displayed near the water front and around the square where the statue of Thorwaldsen faces the Althing (Parliament) house. The buildings are of wood (all brought from Denmark, Norway or Scotland), fre- quently sheathed with corrugated iron, with foundations, in many cases, of concrete blocks. Coals from Scotland are shipped here in great quantities, and the houses are thus provided with comfortable heating equipments. Some of the houses are also stuccoed. At times there is an architectural elaboration noted, but the houses are usually plain and serviceable. Two bank buildings of concrete blocks (the manufacture of these blocks is carried on in Reykjavik) gave its business street a very substantial expression, and two hotels continued TRIP AROUND ICELAND 561 ANSTOR ST., REYKJAVIK. the agreeable impression that Reykjavik was becoming popular. Photographers are kept busy flattering the vanity of its handsome sons and fair daughters; book-stores supply you with literature of all ages, from “ Uncle Tom’s Cabin” to the last verses of Thorsteinson; a public library of seventy thousand volumes (in which the Bulletin of the American Museum of Natural History may be found) will furnish the visitor with undreamed-of learning, and a cathedral with an organ, a bishop and a choir will save his feet from erring on Sunday; while his incredulous eyes will be shown a public school, a Latin school, a ladies’ seminary and a literary club. The last touches of modernity are given in a theater and a jail. Surely those long winter nights, which scarcely leave any day at all, must approach, in the autumn months, shorn of some of their worst terrors. And then there is the coffee house, where coffee, only excelled in Arabia, can be obtained, and languidly sipped to the accompaniment of popular songs on the piano, or in the companionship of garrulous friends. And there is the chess club, which meets on Athalstraeti! There are two museums in Reykjavik: one a museum of natural history (open one hour a week) and a museum of antiquities—the VOL, LXXI.--36. 562 POPULAR SCIENCE MONTHLY THE OXAIA Foss, THINGVALLIR. latter over the bank. Both contain admirable specimens and both, it is projected, will be housed with the library in a new public building, where room will be provided ample enough to make these three “ foun- dations ” an ornament to the city. The museum of antiquities has unquestionable importance. Here are very old altar pieces (Christianity was introduced into Iceland in 1000), old vestments and church paintings, with strange archaic buckles, girdles of brass, silver and gold, rugs, carved boxes, old cab- inets, swords (many of them strips of iron rust), poignards, stone pestles and mortars, saddles, bits and bridles, lamps and chairs. The crowning group of objects is a collection of most curious hand mangles, or rollers, for linen fabrics. These “rullur” are made of wood and most elaborately carved, having one uniform form but differ- ing in size and in ornamentation. Some, two and a half feet long, are covered from end to end with carvings, not grotesque, but simple, and rudely or quaintly symbolic and decorative. Glyptic skill has been characteristic in Iceland. J saw some excellent modern examples in snuff horns made from ivory, with carved motifs taken from the Ice- landic mythology. It seems probable that this ability prevailed more TRIP AROUND ICELAND 563 ALMANNAJA WALL AND ROAD. in the past than to-day, and may have developed as a recreative feature in the long periods of isolation and idleness. Examples of this old art are difficult to get, and high prices are paid for authentic specimens. I obtained an antique lamp, in hammered brass from Olafur Sveinsson, the goldsmith and jeweler (5 Austur St., Reykjavik), who deals in every variety of Icelandic curiosities, including belts, brooches, head-dresses, mantles, snuff boxes, bed boards, buttons, bracelets, drink- ing horns, ete. I paid about four dollars for my little fish-oil lamp and prize it greatly. From Reykjavik the excursions into the interior are most usually made, though, as I described in a former number, they may begin from the east or northern ports. But the guides and ponies come from Reykjavik and are sent overland. The preparations for a long sojourn in the interior are formidable, especially when the trip contemplated is beyond the zone of habitation and brings the traveller into the tenant- less tracts of the middle island. JI had no such ambitions or expensive schemes to consider. The ponies represent the vehicle of transport, and none to the accomplished rider could be more acceptable. Their endurance is phenomenal. ‘Two are allotted to each rider, in order to 564 POPULAR SCIENCE MONTHLY ALMANNAJA, ASCENDING ROAD BETWEEN WALLS. change animals. Halts are frequent, where the ponies are considerately treated, and where pasturage is attractive. The ponies feed a little, are remounted, and the journey is continued. Pack ponies carry provisions, clothing and outfit. The guides are unusually intelligent men, many of them teachers during the winter, and are resolute, capable, resourceful and safe. They speak English and can thread the devious trails with certainty. In many instances local guides are necessary, as in the crossing of the more difficult rivers. At last my arrangements were completed, and, with some hastily and not very discerningly purchased “ canned goods” (they were Eng- lish and Danish preparations), and some oil-skin clothes and a pair of loaned water-tight boots, my small cavalcade of fine ponies departed for Thingvallir, up Austur street, bound for the distant Gullfoss. As a most unpractised horseman, I had felt apprehensive about my ap- pearance on one of these jogging ponies, and from the ill-concealed mirth amongst the old women on their way to the public laundry on the outskirts of the town, my worst suspicions were justified. On my return to Reykjavik eight days later, I feel no compunctions in stating, I was unnoticed, an excellent testimonial to my improved horseman- TRIP AROUND ICELAND 565 CAIRNS, TO MARK PATHS IN THE W1NTER SNOWS. ship. The easy and instantaneous control over these active animals by the Icelander is admirable. They are all excellent riders, and with bare back or saddle and stirrups shoot over rock-strewn fields with confidence. These ponies are most gregarious and mine would whinny dismally when left far behind by my precipitate companion. The road to Thingvallir from Reykjavik is excellent, and in places is receiving reinforcement by stone blocks and gutters. It runs for twenty-eight miles (seven Danish miles) and can be used-by bicycles and vehicles. ‘Traveling in Iceland is slowly undergoing helpful trans- formations; the discomforts and, in a measure, the perils diminish with the introduction of roads and bridges though this need not dis- courage any one who is looking for adventure. The jokulls will cer- tainly repel coercion, and many of the rivers at their periods of trans- porting rage throw off the yoke of bridges. Let the young men, who wish adventure and exposure, suffer from no qualms of disappointment over the disappearance of either from Iceland. The region first encountered was a hummocky moorland with stony tracts and distant encircling mountain ranges. It grew rapidly more wild and interesting. We reviewed a rolling country with distant hills, near-by vales and valleys, and breezy brows of rising land—an austere, 566 POPULAR SCIENCE MONTHLY THE ALMANNAJA. lonely country, full of light, and swept over by cold winds. Then out again we galloped over more spacious areas with intermediate black scoriaceous hills, and here and there in green valleys a farm house. There were lakes and morassy heavily-bedded depressions about us with stony sheets of rubble and wind-swept acres of upland, in which we saw grouse and plover, the latter in numbers. An occasional raven croaked ominously, or protesting curlews whistled at our feet. There were many verdant spots and many more barren ones with the distant snow-covered ranges always in sight. ‘The Thingvallir plain is a remarkably undulating or rather abruptly hilly amphitheater with a rising and falling road. At last, after a passage across a breezy divide, we came in sight of the great vain or lake of Thingvallir. From this point on the journey gained more and more in interest, and crossing dried-up or running stream-beds, and under high banks, with the mountains, beyond the lake, looming up with peaked summits and snow-gullies, with the occasional appearance of a green oasis about some farmhouse, we drew nearer and nearer to our destination, I with great relief, by reason of a badly bruised and suffering body. The little red-roofed church, distinguished far off amongst its TRIP AROUND ICELAND 567 CHASM AT THE LOGBERG, gray and green fields, was seen close at hand, the road began a descent, and, in an instant, the portentous gateway of the Almannaja, like an Egyptian facade loomed gloomily in our path. We moved slowly— awed into temporary silence—down the gradually sloping road between the frowning walls, over a bridge spanning a brawling torrent by a clear, deep pool, and before us, on a ragged plain, which held a fortuitous sort of herbage, fighting its way against the discourage- ments of a stony soil, was the Walhalla Hotel. To me, at least, it assumed all the radiance of that mythical paradise. The next day was brilliantly clear, and we studied our locality. It presented a wonderful geological phenomenon. It was a broad valley of depression, between mountains, rifted by long parallel chasms, which crossed it in the direction of its longer diameter, and which were easily descried from a considerable distance, by the furrows they pre- sented in the landscape, by reason of the unequal elevation of their bounding walls. There were some eight of these remarkable fissures— the sundered seams in one vast flooring of erupted rock—and many of them, as that one in which the ancient Logberg stood, contained softly flowing streams of water. WILBUR OTIS ATWATER, Late Professor of Chemistry in Wesleyan University, who attained eminence for his inves- tigations in metamerism and with the respiration calorimeter. THE PROGRESS OF SCIENCE 569 THE PROGRESS OF SCIENCE THE RISE IN PRICES AND THE SALARIES OF SCIENTIFIC MEN THE extraordinary rise in prices which has occurred in the course of the past ten years—amounting to about fifty per cent. according to the index numbers of the Hconomist—is a seri- ous matter for those who are depend- ent on fixed salaries, as is the case with most scientific men. It is also an obstacle in the way of the advance of science. Those who should be en- gaged in scientific research may be compelled to give part of their time to | securing the incomes that are needed; some may be diverted altogether from the scientific career, while others may hesitate to enter it. There has always been a kind of panmixia among scien- tific workers, a lack of severe selection of the most fit. The number of those in this country who have undertaken scientific work does not considerably | exceed five thousand, and those who do not prove competent to do work of | fortunate that we can not adopt a more value are likely to retain their posi- tions in institutions of learning or in the government service. Should there be a negative natural selection drawing the ablest men away from a scientific career, it would be a serious matter, the future of our civilization depending largely on the comparatively small group of scientific men. It is a curious fact that it is largely scientific discovery that has lessened the incomes of scientific men. Prices depend on all sorts of conditions, psy- chological as well as material, but in the end they are determined by the value of gold and the value of gold | depends on the cost of production. The cyanide process and other advances in metallurgy, mining and geology. as well as the discovery of new fields, have greatly lessened the cost of producing gold. The world’s production of gold in 1896 amounted to 202 million dol- lars, in 1906 to 400 million dollars, or almost double. Unlike the wheat crop, the annual output of gold is not con- sumed, and the supply is probably in- creasing more rapidly than industry and commerce, while at the same time relatively greater use is made of gov- ernment notes and bank checks. The decreased cost of producing gold tends to make all prices higher, and wages and debts are payable in value less than had been agreed. If the cost of production and the demand for gold should remain constant, there would be an adjustment of the supply; and prices and wages would remain con- stant on a higher level. But wages | reach this level more slowly than most | prices, and scientific men and others with fixed salaries suffer. As a matter of fact, both the production of gold and the demand for it will remain subject to great fluctuation, and it seems un- constant standard of value, such as would be obtained by averaging to- gether all staple commodities produced in a series of years, and letting the government issue paper currency pay- able in these commodities and secured by the property of the nation. THE MARIA MITCHELL MEMORIAL Maria MITCHELL, professor of as- tronomy at Vassar College from 1865 to 1888, a leader in her science, in the higher education of women and in the movement extending the independence of women, was born in Nantucket in 1818, and was buried there in 1889. The Nantucket Maria Mitchell Asso- ciation, organized in 1902 purchased at that time Miss Mitchell’s birth- ELL. MITCH MARIA SW fe SCIENCE THE PROGRESS OF _ ue - rome wea tt - THE MARIA MITCHELL NANTUCKET MEMORIAL. INTERIOR OF THE MEMORIAL. 572 place. The building has been fitted up as a center of scientific interest for the community, classes in astronomy being there conducted under the general di- rection of Miss Cannon, of the Harvard Observatory. This summer Professor Mary W. Whitney, a student of Maria Mitchell and her successor at the Vas- sar Observatory, spent a week at Nan- tucket, where she gave lectures and informal talks on Maria Mitchell and recent work in astronomy. It is in- tended to use the building for natural history as well as astronomy. In March of the present year a five- inch equatorial telescope, made by Alvan Clark and formerly owned by Miss Mitchell, was given to the asso- ciation, and it is proposed to build an | observatory that will properly house the telescope in a fire-proof building. Efforts to complete this building, to | enlarge the equipment and to maintain the work are being made, and those | who are interested in the work of Maria Mitchell or in a scientific insti- tution such as is planned for Nan- tucket are invited to join the associa- tion, which they can do by paying one dollar annually or ten dollars as a life member. SCIENTIFIC ITEMS WE record with regret the death of Professor Lucien M. Underwood, head of the department of botany of Co- lumbia University; of Dr. Edward Gardiner, of the Marine Biological Laboratory; of M. Maurice Loewy, di- rector of the Paris Observatory, and of Mr. Howard Saunders, the British ornithologist. A MEMORIAL meeting in honor of the late James Carroll was held by the Johns Hopkins Hospital Historical Club on October 14. Addresses were delivered by Drs. William H. Welch, , POPULAR SCIENCE MONTHLY Howard A. Kelly and William S&S. Thayer.—The Geographical Society of Philadelphia will hold a meeting on November 6, in memory of the late Angelo Heilprin, founder of the society. —Friends of the late Walter Frank Raphael Weldon, formerly Linacre pro- fessor of comparative anatomy at Ox- ford, have offered the university a sum of about £1,000 for the foundation of a prize, with a view to perpetuate the memory of Professor Weldon and to encourage biometric science. THE Royal Society has this year awarded its Davy medal to Dr. E. W. Morley, emeritus professor of chem- istry, Western Reserve University, and its Copley medal to Dr. A. A. Michel- son, professor of physics, the Univer- sity of Chicago.—Dr. Richard Wett- stein, Ritter von Westerheim, professor of systematic botany at Vienna, has been elected president of the Associa- tion of German Men of Science and Physicians for the meeting to be held next year at Cologne. THE American Association for the Advancement of Science meets at the University of Chicago during convoca- tion week, which this year begins on December 30. Together with the Am- erican Association meet the Society of American Naturalists and the special societies devoted to anthropology, bot- any, chemistry, mathematics, physiol- ogy, anatomy, psychology, geography and entomology. It is to be hoped that all who are able will plan to attend this meeting—not only professional men of science, but also readers of this journal who are interested in the progress of science. At the New York meeting last year, there were about 2,000 scientific men in attendance, and there is every reason to believe that the Chicago meeting will be equally important. INDEX 5 ~I w INDEX. NAMES OF CONTRIBUTORS ARE PRINTED IN SMALL CAPITALS Acassiz, G. R., Mars as seen in the Lowell Refractor, 275 Agassiz, What we owe to, Burr G. WILpER, 5; Jean Louis Rudolphe Agassiz, Epwarp S. Mors, 542 Age, Growth and Death, the Problem of, CHARLES S. Minot, 97, 193, 359, 455, 509 American, Philosophical Society and Benjamin Franklin, 92; Girls, Health of, NELLIE COMMINS WHITAKER, 234 ANDERSON, Ropert, The Great Jap- anese Volcano Aso, 29 Ants, the Origin of Slavery among, WILLIAM Morton WHEELER, 550 Appalachian Mountains, South, The Heart of the, SpENcER TRoTTER, 149 Argyle, the Duke of, 189 Asiatic Museums, Notes on, BASHFORD Dean, 481 Aso, the Great Japanese Volcano, Ros- ERT ANDERSON, 29 Balsam Peaks—the Heart of the South Appalachian Mountains, SPENCER TROTTER, 149 Benjamin Franklin and the American Philosophical Society, 92 Bicentenary of the Birth of Linnezus, Celebration by the New York Acad- emy of Sciences, 94 Botton, FREDERICK E., Some Ethical Aspects of Mental Economy, 246 Bonp, FREDERIC Drew, Poe as an Evo- lutionist, 267 British Association for the Advance- ment of Science, Address of the President of the Engineering Sec- tion, SyLvaAnus P. THompson, 337 Brown, Ropert MarsHary, Recent Legislation on the Mississippi River, Byers, CHAarLES AtMA, Control of the Colorado iver regained, 50 Carnegie Foundation, Retiring Allow- ances of, and the State Universities, 95 CHAMBERLAIN, ALEXANDER F., Recent Views of the Origin of the Greek Temple, 448 Children, School, the Sacrifice of the Eyes of, Water D. Scort, 303 Chinaman and the Foreign Devils, CHARLES Braprorp Hupson, 258 CHITTENDEN, RusseLt H.,. The Influ- ence of Diet on Endurance and Gen- eral Etficiency, 536 CLELAND, HERDMAN F., Some Little- known Mexican Volcanoes, 179 CocKERELL, T. D. A., and F. B. R. HELLEMS, A Scientific Comedy of Errors, 217 Colorado River, Control CHARLES ALMA Byers, 50 Conscience, The Physical, Reawakening of the, RicHarp Cote Newron, 156 regained, DEAN, BasHrorp, Notes Museums, 481 Death, Age, Growth and, the Problem of, CHARLES S. Minor, 97, 193, 359, 455, 509 DeLAND, FRED, Notes on the Develop- ment of Telephone Service, 21, 139, 226, 313, 433 Diet, the Influence of, on Endurance and General Efficiency, Russett H. CHITTENDEN, 536 on Asiatie EASTMAN, CHartes R., Illustrations of Medieval Earth-science, 84 Elements, Transmutation of, and Ra- dium Emanation, 287 Endurance and General Efficiency, the Influence of Diet on, RussetL H. CHITTENDEN, 536 Engineering Section of the British As- sociation, Address of the President, SyLvanus P. THoMpson, 337 Errors, Scientific Comedy of, T. D. A. CocKERELL and F. B. R. HELLEMs, 217 Ethical Aspects of Mental Economy, FREDERICK E. Boiron, 246 Eugenics, Probability the Foundation of, FRANCIS Gatton, 165; National, The Scope and Importance to the State of the Science of, Karn PErar- son, 385 Evolutionist, Poe Drew Bonn, 267 Eyes of School Children, Sacrifice of, WALTER D. Scort, 303 as an, FREDERIC Fertility and Genius, Cartes Kasset, 452 Foreign Devils, the Chinaman and, CHARLES BrApForp Hupson, 258 574 POPULAR France, The Institute of, and Some | Learned Societies of Paris, EDWARD | F. WILLIAMS, 439 | GaLron, Francis, Probability the Foundation of Kugenics, 165 Girls, American, Health otf, NELLIE | CoMMINS WHITAKER, 234 GratacaP, L. P., A Trip around Ice- land, 289, 420, 560 Greek Temple, Recent Views of the Origin of the, ALEXANDER F. CHAM- BERLAIN, 448 GREGoRY, WILLIAM K., The Place of Linneus in the Unfolding of Science, za Growth, Age and Death, the Problem | of, CHARLES S. Minot, 97, 193, 359, 455, 509 Health of American Girls, NELLIE) CoMMINS WHITAKER, 234 Hetteos, F. B. R., and T. D. A. Cock- | ERELL, A Scientific Comedy of Er- rors, 217 Helmholtz, Hermann von, 283 History of Science, The Place of Lin- neus in the, ARTHUR O. LOVEJOY, 498 Hupson, CHARLES Braprorp, The Chinaman and the Foreign Devils, 258 Hygiene, The Newer, Witrrep H. Man- WARING, 66 Iceland, A Trip around, L. P. Grava- CAP, 289, 420, 560 Illustrations of Medieval Earth-science, CHARLES R. EASTMAN, 84 Institute of France and Some Other Learned Societies of Paris, Epwarp F. WILLIAMS, 439 Japanese Volcano Aso, ROBERT ANDER- son, 29 Kalm, Peter, Travels, SpENcER TROT- TER, 413 KASSELL, CHARLES, Fertility and Ge- nius, 452 Legislation, Recent, on the Mississippi | River, Rospert MArsHALL Brown, 131 Light, Speed of, and its Wave-length, 188 Linneus, Bicentenary of the Birth of, | Celebration by the New York Acad- emy of Sciences, 94; the Place of, in the Unfolding of Science, WIL- | LIAM K. Grecory, 121; and the Love for Nature, Epwarp K. PuTNAM, 318; The Place of, in the History of Science, ARTHUR O. LovEJoy, 498 Linnean Celebrations in Sweden, 284 | SCIENCE MONTHLY Lovesoy, ARTHUR O., The Place of Lin- neus in the History of Science, 498 Lowell Refractor, Mars as seen in the, G. R. AGaAssiz, 275 Man, Forms of Selection with reference to their Application to Man, G. P. WATKINS, 69 MANWARING, WILFRED H., The Newer Hygiene, 66 Mars as seen in the Lowell Ret.-actor, G. R. AGassiz, 275 Medieval Earth-science, Illustrations of, CHARLES R. EAstTMaAn, 84 Mental Economy, Ethical Aspects of, FREDERICK E. Botton, 246 Mexican Volcanoes, Some Little-known, HERDMAN I. CLELAND, 179 Minot, CuHarues §., The Problem of Age, Growth and Death, 97, 193, 359, 455, 509 _Mississippi River, Recent Legislation on the, Ropert MarsHaLtL Brown, 131 | Mitchell, Maria, Memorial, 569 Morse, Epwarp §., Jean Louis Ru- dolphe Agassiz, 542 Mortality Statistics, 475 Mountains, South Appalachian, The Balsam Peaks, SPENCER TROTTER, 149 Museums, Asiatic, Notes on, BASHFORD DEAN, 481 National, Observatory, Early Move- ments in the United States for a, CHARLES OSCAR PAULLIN, 325; Eu- genics, The Scope and Importance to the State of the Science of, KARL PEARSON, 385 Nature, Linné and the Love for, Epb- warp K. Putnam, 318 NEwToN, RicHarD CoE, The awakening of tne Physical science, 156 New York Academy of Sciences, Cele- bration of the Bicentenary of the Birth of Linnzus, 94 Re- Con- Observatory, National, Early Move- ments in the United States for a, CHARLES OSCAR PAULLIN, 325 PapiIni, GIOVANNI, What Pragmatism is like, 351 Paris, Learned Societies of, and the Institute of France, Epwarp IF. WI1- LIAMS, 439 PAULLIN, CHARLES Oscar, Early Move- ments in the United states for a Na- tional Observatory, 325 PEARSON, Kart, The Scope and Impor- tance to the State of the Science of National Eugenies, 385 Peter Kalm’s Travels, SPENCER TROT- TER, 413 INDEX 575 Philosophical Society, American, and | Slavery among Ants, The Origin of, Benjamin Franklin, 92 WititramM Morton WHEELER, 550 Physical Conscience, The Reawakening Speed of Light and its Wave-length, of, RicHARD COLE NEWTON, 156 188 Poe as an Evolutionist, FREDERIC DREW State Universities, and the System of Bonn, 267 Retiring Allowances of the Carnegie Porncark, H., The Value of Science, 53 Foundation, 95; the Growth of, 477 Pragmatism, What it is like, GlovANNI Statistics, Mortality, 475 PaPINI, 351 Strone, W. W., Radioactivity of Or- Prices, the Rise in, and the Salaries of dinary Substances, 524 Scientific Men, 569 Sweden, Linnean Celebrations in, 284 Probability, the Foundation of Eugen- ics, FRANCIS GALTON, 165 Telephone Service, Notes on the Devel- Progress of Science, 92, 188, 283, 379, opment of, FRED DELAND, 21, 139, 475, 569 226, 313, 433 PurnaM, Epwarp K., Linné and the Temple, Greek, Recent Views of the Love for Nature, 318 Origin of the, ALEXANDER F. CHam- BERLAIN, 448 THOMPSON, SYLVANUS P., Address of the President of the Engineering Sec- tion of the British Association for the Advancement of Science, 337 Transmutation of the Elements and Radium Emanation, 287 TROTTER, SPENCER, The Balsam Peaks —the Heart of the South Appala- chian Mountains, 149; Peter Kalm’s Radioactivity of Ordinary Substances, W. W. STRONG, 524 Radium Emanation and the Transmu- tation of the Elements, 287 Reawakening of the Physical Con- science, RIcHARD CoLE NEwToNn, 156 Refractor, the Lowell, Mars as seen in the, G. R. Acassiz, 275 Retiring Allowances of the Carnegie eae Foundation and the State Waivers Travels, 413 ties, 95 Universities, State, The Growth of the, 477 University Salaries, 58 River, Mississippi, Recent Legislation on the, RoBerRT MARSHALL Brown, 131; Colorado, Control regained, ‘HAR ALMA B 5 = : Paar Cuartes ALMA Byers, 50 Value of Science, H. PorIncAaRE, 53 | Voleano, The Great Japanese, Aso, Sacrifice of the Eyes of School Chil- ROBERT ANDERSON, 29 dren, WALTER D. Scott, 303 Voleanoes, Mexican, Some Little- Salaries of Scientific Men and the Rise known, HERDMAN F. CLELAND, 179 in Prices, 569 Selection, Forms of, with reference to | WATKINS, G. P., The Forms of Selec- their Application to Man, G. P. tion with reference to their Applica- WATKINS, 69 tion to Man, 69 Science, The Value of, H. Porncaré, | Wave-length and Speed of Light, 188 53; the Place of Linneus in the Un- | Wealth of the United States, 382 folding of, Wirrtam K. GrecGory, | WHEELER, WILLIAM Morton, The Or- 121; the Place of Linneus in the igin of Slavery among Ants, 550 History of, ARTHUR O. LovEsoy, 498 | WHITAKER, NELLIE ComMMINS, The Sciences, New York Academy of, Cele-| Health of American Girls, 234 bration of the Bicentenary of the | WILpER, Burt G., What we owe to Birth of Linnzus, 94 | Agassiz, 5 Scientific, Items, 96, 191, 287, 384, | Wir~rams, Epwarp F., The Institute 479, 572; Comedy of Errors. T. D. A.| of France and Some Other Learned CocKERELL and F. B. R. Hettems,| Societies of Paris, 439 217 | Scorr, WALTER D., The Sacrifice of the Eyes of School Chilaren, 303 Zoological Congress, The Seventh In- ternational, 379 ' = fee = rar: '\ , “¢ aikinwhes: wer THE ?OPULAR SCIENCE MONTHLY. EDITED BY J. McKEEN CATTELL > CONTENTS ie Problem of Age, Growth and Death. Proresson CoHarites§. Minor 97 he Place of Linnzus in the Unfolding of Science: His Views on the Class Mammalia. Wiir1am K.Grrcory . ....... . 121 Recent Legislation on the Mississippi River. RosBert Marsuatt Brown 131 ‘otes on the Development of Telephone Service. Frep DeELanpD . . 139 he Balsam Peaks—the Heart of the South Appalachian Mountains, SPENCER TROTTER 149 che Reawakening of the Physical Conscience. : Dr. RicHarp CoLE Newton 156 robability—The Foundation of Eugenics. Dr. Francis GAtton. . . 165 tome Little-known Mexican Volcanoes. Proressorn HeERDMAN F, CLELAND 179 ‘he Progress of Science: ; Does the Speed of Light depend upon its Wave-length ? ; The Duke of Argyle ; MARES POOR, So SS ele, fe gale Se NERS OR eae oh ote KE EAS see! Eee THE SCIENCE PRESS LANCASTER, PA. GARRISON, N. Y. 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