a A HARDY-WILLIAMS LIBRARY OF THE GEOLOGICAL HISTORY OF ORGANISMS FOUNDED BY CHARLES ELIAS HARDY (sony 27, 170s—sULx 7, 1668) eel janic evolution il 02 considered. Cornell University The original of this book is in the Cornell University Library. There are no known copyright restrictions in the United States on the use of the text. http://www.archive.org/details/cu31924024755534 ORGANIC EVOLUTION CONSIDERED BY ALFRED FAIRHURST, A. M., 4 Professor of Natural Science in Kentucky University. St. Lovis: CHRISTIAN PUBLISHING COMPANY. 1897, Copyrighted, 1897, by CHRISTIAN PUBLISHING COMPANY. TO Allen iR. Benton, MY FAITHFUL FRIEND AND MY FORMER TEACHER, This Volume Is Lovingly Dedicated. PREFACE, Havine been for many years a teacher of various branches of natural science, it has been my duty to discuss the subject of organic evolution. This vol- ume contains some of the objections which I have from time to time presented against the acceptance of that theory, together with several chapters on other subjects. A. FarRHURST. LexineTon, Kentucky, December 11, 1897. TABLE OF CONTENTS. I. INTRODUCTION ‘i i Z ‘ . . i II. MATTER. Definition of—Elements, Number of—Physical condition dependent on pressure and temperature—So-called elements may be com- pounds—Divisibility of matter—Size of atoms and molecules— Porosity of matter—Compounds, nature of—Chemical laws gov- erning atoms—Law of definite proportions—Law of multiple proportions — Chemical formulas—Carbon compounds, great number and importance of—Organic and Inorganic Chemistry — Isomerism—Organized matter not formed by thejchemist. 14-29 III, FORCE. Definition—Kinds of—Correlation of different kinds of energy—The- ory as to what the different kinds of energy are—Sound the vibration of a material medium—Radiant energy the vibration of an ethereal medium—Difficulties as to explaining gravity— Infinite complexity of ethereal vibrations—Velocity of radiant energy—Lord Kelvin’s views of the luminiferous ether—Lodge’s views as to the nature of ether—Conclusions as to the nature of ether—Cohesion, capillarity, chemism, magnetism—Dissipation of energy into infinite space. . ‘ : ‘ . 80-48 IV. METHOD OF CREATION. Spontaneous Generation—Theistic methods of creation that are possible—Primary and secondary causes—Special fiats seem to have been necessary—Biblical view of the relation of the Creator to nature—The dispute as to method of creation is between Theism and Atheism—Necessary to assume Theism in crea- tion. . . 7 ‘ : < , . 49-56 V. SPONTANEOUS GENERATION. Length of the authentic geological record—Special act required to create the first living being—Elements that are necessary for living things—Attempts to prove the truth of spontaneous gen- eration failures—Nature ought to have produced spontaneous generation many times, if once—Science has failed to reveal the origin of life ‘ : . , : . 57-64 6) 6 TABLE OF CONTENTS VI. NATURAL SELECTION. Facts on which the theory is founded—Rate of increase of organ- isms— Variations —Differences— Use of the phrase ‘‘ Natural Selection ’?—Darwin’s views stated—Evolution of man not due to chance—Evolution represented by the tree as a figure—Varia- tion under domestication—Darwin claims that well-marked variations are incipient species—Difficulty of accounting for cross-sterility of closely-related species—Difficulty of preserving a variation in a state of nature—Assumption of cross-sterility by birth as an explanation—Isolation regarded as of importance in forming new species—Barriers fail to account for new species—Impossible for Natural Selection to do what is done by artificial selection—Inheritance of acquired characters. . 65-86 VII. PALEONTOLOGY. Length of geological time—Eozoon—Lost record claimed, preceding the Primordial—Animals of the Primordial highly organized— Sub-kingdoms and classes from the first widely separated—Ab- sence of transitional forms—Species appear as if by ‘‘substitu- tion’? and ‘not by ‘‘transformation’’—Fragmentariness of the record exaggerated—Evolutionist assumes that the ‘missing links’ favor his theory—Romanes regards the known geological record as ‘‘a chapter of accidents ’’—Le Conte’s theory that spe- cies are evolved suddenly—Evolutionists have largely abandoned. Paleontology. ‘ ‘ ¥ ‘ ¥ ‘ - 87-103 VIII. PALEONTOLOGY. The evolution of man inconsistent with the known stability of spe- cies—Species of long life—Doubt by Darwin as to advance of organization, on the whole—Long history of Trilobites without progress—Lack of progress among mollusks—Little progress among insects, scorpions and spiders—Huxley’s address as to lack of [progress in structure—Suddenness of the appearance of Fishes—The oldest fossils do not represent the lowest members of the classes—Great differences in structure of Eocene mam- mals—The classes of vertebrates began earlier than their known fossils. ‘i : ‘ F . + 104-124 IX. PALEONTOLOGY. Heckel’s primitive vertebrate, Amphioxus—Balanoglossus as a con- necting link—Long existence of these forms without change— Various long-lived forms that have made no progress—Remains of placental mammals ought to be found in Cretaceous—Great diversity of Eocene mammals—Sudden appearance of Eocene mammals—Whales of the Miocene—The horses of the Tertiary— Conclusions to be drawn. ‘ ‘ ¥ . + 125-140 TABLE OF CONTENTS 7 xX. EMBRYOLOGY. Protozoa and Metazoa—Methods of reproduction—Radical differ- ences in the embryos of animals—Embryology applied to man’s ancestors—Resemblances in embryos largely superficial—Embry- ology cannot confirm the theory of evolution—Gill-arches of the lizard. 5 5 : : : ‘i : . 141-152 XI. SPECIAL OBJECTIONS TO THE THEORY OF EVOLU- TION. Evolution must account for the existence of all organs—Difficulty of accounting for the various electric organs of fishes—Difficulty as to wings—Feathers and legs—Great difference between fins and legs—As to the evolution of Pterodactyls—The evolution of Birds presents special difficulties—Improbability of the evolu- tion, independently, of homologous structures—Correlation of growth as a factor in evolution—Inheritance of acquired char- acters as a factor—Evolution of eyes—Numerous kinds and posi- tions of eyes and eye-spots—If eyes were evolved, then numerous independent evolutions of them—Romane’s theory as to evolu- tion of eyes—Various locations of eyes and eye-spots—The evolu- tion of ears presents difficulties—The breathing apparatus of various kinds—The different kinds required separate evolutions —Webs of spiders and stings of insects—Poison glands of snakes and fangs. . . 7 . . 7 . 153-181 XII. RUDIMENTARY ORGANS. Questions concerning them—Darwin’s views as to their origin—Seem ing impossibility of evolving milk glands—Assumption that many mammz have entirely disappeared—Darwin’s views— Origin of the sexual organs—Spurs of birds useless as rudiments —Rudimentary teeth—Rudimentary legs of some snakes. 182-194 XIII. SECONDARY SEXUAL DIFFERENCES. Some of the differences between the sexes—Sexual selection and the law of battle—The horns of deer—Horns of Chameleon Owenii— Sexual selection could not take notice of rudiments—Sexual selec- tion and evolution of colors of birds—Colors of fishes. . 195-203 XIV. INSTINCT. Instincts of the honey bees—Cells and eggs—Queens —their instincts— Instincts of the workers—Workers cannot improve their instincts by inheritance—Instincts which could not have been acquired by inheritance—Darwin’s explanation of such instincts—Instinct of pirds to incubate their eggs, and structure of egg—Iustinct of the Surinam Toad and adaptive structure—Instincts of certain fishes 8 TABLE OF CONTENTS and adaptive structures—Instincts and number of eggs—In- stincts and peculiarities of structure of the water spider—In- stincts of spiders and adaptive structures—Evolution fails to account for the simultaneous production of instincts and the structures that render them useful—Instincts of a scavenger beetle—Instincts of the beaver. ‘ . + 204-229 XV. THE ORIGIN OF MAN. Length of time he has been here—Some of the oldest known skulls— Difficulties as to evolving man’s body—The sizes of the brains of men and apes—Mental powers of savages greater than would be expected—No low race of man serving as a connecting link—The greatest differences between man and animals are psychic— Enumeration of mental powers of animals as given by Darwin— Darwin’s admissions as to deficiency of certain powers in ani- mals—Low moral standing of savages does not favor evolution— Darwin’s theory as to the origin of the moral sense—The general good of the community the test—‘‘Ought’’ employs ‘the con- sciousness of a persistent instinct’’—Habits probably not in- herited—Spencer’s theory as to the origin of instincts—Darwin’s definition of a moral being—Evolution assumes that all psychic phenomena are essentially alike—‘‘ Experiences of utility’ cannot create, but only improve faculties—The faculties of the mind are essentially different—Spencer’s theory that all the faculties are composed of units of feeling that are fundamentally alike—One feeling cannot be derived from another—Spencer’s theory that ‘mind is resolvable into nervous shocks ’’—The authority of con- science—Animals are destitute of conscience—Instincts do not speak with the authority of conscience—Mind as a controlling power in nature—Mind not resolvable into matter plus motion— Our knowledge of mind is immediate—Relations of mind to other things—Mind is ever conscious of its supremacy—How explain the act of remembering? It is not sensation—Reason, will, and other faculties are not sensations—Dana’s belief in a Divine Being. r ‘ é ‘ ‘ - 280-265 XVI. A FUTURE LIFE. Ether a universal medium and God a Universal Spirit—The general hope of the human race as to the future—Means in nature for satisfying every natural desire—Indestructibility of matter and energy and mind—The mystery of inheritance—A future life necessary to fulfill the possibilities of mind—Faith, hope, love. reason, conscience and imagination look to the future—Life and death both parts of the universal plan—The upward progress through the ages points to the future. 3 ‘ + 266-271 TABLE OF CONTENTS 9 1 XVII. DESIGN IN NATURE. Creation has proceeded upward—Temperature of the Sun during millions of years—Comparative uniformity of climate during geological time—Chemical laws to which matter is subject— Many material conditions that must precede life—Elements that are necessary for living beings—Certain relative quantities of the elements are required—Poisonous elements locked up in harmless compounds—Chance cannot account for the elements and their quantities—Length of time in creating does not affect design— Design shown in the structure and powers of man—Time in- volved does not affect design—Design shown in man’s relations to things—Beauty, evidence of design—Moral nature of man, evidence of design—Prevalence of law indicates design—Design shown in plants, animals and minerals—Every organism adapted to its environment—Objections: Rudimentary organs—Things that at one time seem useless become useful. | . « 272-300 XVIII. EVIL AND ALTRUISM IN NATURE. Evil is suffering—Capacity to suffer necessary for protection— Suffering arises from violating the laws of nature—The laws of nature are necessary and beneficent—That the ignorant suffer, and the innocent, justifiable—Man responsible for much suffer- ing—Appetites and passions good if properly governed—Capacity for pleasure and pain increase together—Much more pleasure than pain in life—Altruism in nature. : . . 301-310 XIX. AGNOSTICISM. Belief that space is all alike and infinite—Spencer’s claim that ‘‘Space and Time are wholly incomprehensible’’—‘‘ Mental im- ages’? not the ultimate basis of our knowledge—Spencer’s recon- ciliation of religion and science—Agnosticism—Religion and science occupy different fields—Concerning miracles—not viola- tions of law—Creed of the Agnostic—Agnosticism not ad- apted to man—Spencer’s views of existing religions—Incon- sistency of Spencer’s views—Christianity and Agnosticism con- trasted. F ; : 3 ‘ 7 : . 311-329 XX. RECAPITULATION. Chemical laws—Energy of the universe and its dissipation—Dynam- ical theory of things insufficient—Spontaneous generation not proved—Natural selection and objections to—Little progress in structure among animals generally—Long survival of many forms—Embryology and special objections—Rudimentary organs and secondary: sexual differences—Instincts of bees and birds— Psychic differences between men and animals—Mind the control- ing power. é . . . 4 5 » 830-343 10 TABLE OF CONTENTS XXI. GENESIS AND GEOLOGY. Great incompleteness of the known geological record—Probable chronological order of the introduction of certain forms—The known geological record not to be used for the whole—Impossi- bility of showing a conflict between the record in Genesis and the Geological account—Purpose of the cosmogony in Genesis— Uselessness of Geology to that early people—Moral and religious purpose in Genesis—Monotheism a revelation, of necessity— Monotheism a confirmation of the record in Genesis—The first days of creation. 5 ‘ ‘ - . . 844-353 APPENDIX. Tuer Primary Factors oF OrGanic EvotuTion. By E. D. Corps. Definition of evolution—Energies of evolution and spontaneous gen- eration—Mind and evolution—Definition of life—Variations in organisms the result of mechanical causes—Variations in color of Beetles, Snakes and Lizards—Effect of locality—Teeth—Skele- tons of frogs—Phylogeny founded on Embryology and Paleon- tology—Amphioxus is probably the ancestral vertebrate—Mam- mals derived from Permian reptiles—Great difference in the. structure of teeth of different marsupials—Oldest known mam- mals are highly specialized—Lemurs and not monkeys probably the ancestors of man—Difference in stracture between man and ape—Huxley’s view as to differences in structure of man and ape—Oldest known remains of man—Genealogy of man based on that given by Cope—Cope’s mechanical theory as to variations. applied to man—Causes of variations, Physiogenesis and Kine- togenesis—Physical theory of the origin of lungs—Physical the- ory as to the jointed structure of limbs—Origin of vertebre and teeth—Independent origins of like structures in skele- tons. . . . . . ‘ ri . 854-381 ORGANIC EVOLUTION CONSIDERED. I. INTRODUCTION. In THE following pages I have endeavored to give a general statement of the claims of Evolution as applied to the origin of organic forms, and then to offer those objections which, it seems to me, go far toward invalidating these claims. I have not given in detail all of the arguments which have been presented in support of the theory of organic evolution, for this would be a superfluous work in view of the fact that this has been most fully and ably done by Darwin and other writers. My endeavor has been to urge more in detail some of the objections to the theory than has been done by others. The evolutionist may be a Theist, an Atheist, an Agnostic, a Pantheist, or a Materialist. To my mind it is not a matter of indifference as to which of these he is. I look upon the theory of evolution as being of no importance except as it involves the well-being of man. My object in what I have written is to promote the belief in Theism and in the existence of a spiritual nature in man which Theism alone can explain. It is a fact, I believe, that the propagation of the theory of Evolution has decreased the belief in The- ism. While this may be Snes the fact should not be 12 ORGANIC EVOLUTION CONSIDERED lost sight of that a belief in the former is consisten‘ with a belief in the latter. If it can be shown that the theory of Evolution i: not true, then Theism will, to most minds, be the nec essary alternative. To my own mind, Theism is noi an alternative to Evolution at all, for I believe that whether the latter has taken place or not, Theism i: the only explanation of the present order of things. Starting with the present distribution of matte! and energy in the universe, and accepting the theorn of the indestructibility of matter and the conserva tion and correlation of energy, the belief in the con tinuity of natural processes necessarily follows, so fai as these processes can be explained in terms of Mat ter and Force, but I do not believe that all phenomen:g can be explained in the above terms. I believe that Matter, Force and Mind are mani: festations of the Creator, but I do not think thai either of these can be explained in terms of the othe two. It is the prerogative of Mind to interfere witk the course of events in Nature. The presence of Mind in Nature is the primary fact of human knowledge. To construct a Teleology which excludes Mind as a permanent factor fro Nature is to annihilate the one thing of the existence of which we are most certain. If Matter and Force are a part of Nature, so is Mind, and we have no reason to believe that the latte: is less enduring than the former. To assume the continuity of natural causes througt the infinite past, at the same time eliminating Minc as a factor of Evolution, and regarding it simply as ¢ transient phase of a small part of Nature, is not justi- fied by the facts. I believe that if the truth of the theory of Evolution can ever be established, it can be done only on the basis of Theism. INTRODUCTION 13 The amount of evidence necessary to convince one of the theory depends on the data with which we begin. If Matter and Force are the only data, then the acceptance of the theory of Evolution in its widest scope necessarily follows. If we add to the above a belief in the existence of a Supreme Intelligence, then the strength of the evi- dence must be greatly increased, and it must har- monize with our conceptions of God. It is true, I believe, that the theory of Evolution has contributed to Atheism, and especially to Agnos- ticism. It has been common with evolutionists to deny that Nature furnishes evidence of the existence of an Intelligent Creator. Some of them seem to delight in affirming the lack of design in Nature, as if there could be some special merit in a universe in which there is no manifestation of intelligence. As for myself, I prefer to believe in and to seek the highest possible form of existence of which my mind can conceive. Unless the existence of the human mind can be explained in terms of matter and force—a thing that it is impossible to do—then its existence points with certainty to a Divine Mind in the universe. The logic that blots God out of existence blots out also the human mind. Mind exists, and God exists as its necessary Author. Ii. MATTER. MattTER occupies space, resists being put in motion, and is unable to part with its motion except by communicating it to other matter. About seventy simple substances are known to the chemist. A simple substance, or element, is one that cannot be separated into two or more different kinds of matter; for example, gold, silver, mercury, iron and sulphur are elements. Elements are divided into metals and non-metallic substances, most of them being classed among the former. At ordinary temperatures elements exist as gases, liquids or solids. Four, namely, hydrogen, oxygen, nitrogen, and chlorine, are gases, while bromme and mercury are the only liquid elements, all the others being solids under ordinary conditions. It is proba- ble that fluorine also is a gas. Any substance may be a solid, a liquid, or a gas, depending on the temperature and pressure to which it is subjected. All ordinary gases, both simple and compound, have been liquefied, and some of them solidified, by abstracting their heat and applying pressure. Air has been reduced to solid lumps by the reduc- tion of the temperature alone. Oxygen has been liquefied, but it has not yet been solidified. The lowest temperature yet obtained is minus 225° C. Olzewski obtained this extremely low tempera- ture by evaporating solid nitrogen in a vacuum. The absolute zero, or the point at which no heat is 14 MATTER 15 supposed to exist in matter, is minus 273 °C, so that a temperature has been reached only 48 °C above the absolute zero. It has been found that gases can not be liquefied and solidified by the application of any amount of pressure, however great, unless at the same time their temperature be reduced below the critical point. Pressure is, therefore, only a secondary factor in liquefying gases. I have stated that there are about seventy elements known to the chemist, and that an element cannot be separated into two or more kinds of matter. There is some evidence to indicate that the ele- ments are compounds. The fact that the so-called elements generally give many lines in the spectrum, instead of giving a single line, would seem to indicate that an element is not composed of homogeneous material, and the fact that the chemical action of an element varies under different circumstances in re- markable ways, as, for example, carbon in the hydro- carbon compounds has been regarded as evidence that elements are really compounds. On the other hand, it has been claimed that all elements have probably been derived from one orig- inal form of matter, which Professor Crookes calls protyle. From this original stuff, ‘ fire-mist,’’ the elements, as we know them, have been evolved in succession, by cooling; the smallest atoms, such as those of hydrogen, having been first formed. The numerical relations between the atomic weights as arranged by Mendeléeff, may be regarded as evi- dence of the common origin of elements. For all practical purposes, however, the chemist recognizes the seventy elements as such, and this from the fact that he is unable to separate them into simpler forms. 16 ORGANIC EVOLUTION CONSIDERED If we grind a piece of sulphur in a mortar, we break it into smaller and smaller pieces, each of which is sulphur. If we could put it into the mor- tars of the gods, which, it is said, ‘‘ grind slow but exceeding small,’? would there be any practical limit to the smallness of the pieces? Is there a limit in the division of matter beyond which nature cannot go? The chemist images that there is a limit, and he calls the ultimate piece of matter which nature does not divide an atom. No eye has ever seen an atom, no microscope can ever render it visible. The mote that dances in the sunbeam is composed of millions of atoms. The spectroscope enables us to detect the 1/189,000,000 Of a grain of sodium, and this small speck of sodium must contain millions of atoms in order to color the flame sufficiently to render the sodium visible. A grain of musk, it is said, will scent a room for years without losing an appreciable amount of its weight, and yet during this time the air in the room has changed many times, and the molecules of musk have been disseminated through the vast volume so that the sense of smell could detect their presence. What an enormous volume of air a little of the musk from the skunk will vitiate, and yet this is only possible by the almost infinite smallness of the molecules. Nobert has drawn 4,000 lines on the breadth of one millimetre, which is more than 200,000 lines to the inch. A film of silver has been obtained 1/167,000 of an inch in thickness, and films of platinum and gold have been obtained 1/125,000 of an inch in thickness, and yet it is probable that this thickness contains many atoms. The thickness of the soap-bubble at the dark part just before it breaks, is 1/5 of the length of the MATTER 17 sodium wave of light, which would be something more than 4/100,00 of a centimetre in thickness. But the molecules of this thin film are very complex, so that in the thickness of the film quite a number of atoms must exist. Sir William Thomson says ‘‘that in any ordinary liquid, transparent solid, or seemingly opaque solid, the mean distance between the centres of contiguous molecules ‘is less than the 1/5,000,000 and greater than the 1/1,000,000,000 Of a centimetre.’’* ““To form some conception of the degree of coarse- grainedness indicated by this conclusion, imagine a globe of water or glass, as large as a football, to be magnified up to the size of the earth, each constituent molecule being magnified in the same proportion. The magnified structure would be more coarse-grained than a heap of small shot, but probably less coarse- grained than a heap of footballs.” It is said that the smallest object visible under the microscope is 1/4,000 of a millimetre, which is about 1/190,000 Of an inch, and yet such an object contains millions of molecules. It has been claimed that an organic being of that size would contain perhaps one million molecules of organic matter in addition to the water which constitutes most of its bulk. Crookes, taking the estimate that 1 c. c. of air con- tains 1,000,000,000,000,000,000,000 molecules, says that to fill a globe 13.5 centimetres in diameter, which has been exhausted to the one-millionth of an atmosphere, would require, if the molecules entered at the rate of 100,000,000 in a second, 408,501,731 years. At the above rate it would require about 2,500,000 years to filla globe one inch in diameter. If we estimate the number of molecules at 19,000,000,000,000,000,000 in a cubic centimetre, as has been done by some, then *Popular Lectures and Addresses, Sir W. Thomson, p. 217. 2 18 ORGANIC EVOLUTION CONSIDERED the above times would be reduced to about 7,700,000 and 47,500 years respectively. Assuming a specific number of molecules per cubic centimetre of any gas, and accepting the hypothesis of Avogadro that equal volumes of all gases under like conditions of temperature and pressure contain equal numbers of molecules, it becomes easy to calcu- late the number of molecules of simple substances that constitute any solid or liquid that can be readily converted into the form of gases. For example, a cubic centimetre of nitric acid, the formula of which is H NOs, specific gravity 1.517, is composed of about 272 cubic centimetres of nitro- gen, 273 of hydrogen, and 809 c. c. of oxygen, the vol- ume of the three gases together is 13854 c. c. When these three gases unite to form nitric acid the 1354 c. c., shrink tolc.c. Assuming 19,000,000,000,000,- 000,000 molecules in 1 c. c. of the gas, there would be in 1354 c. ec. 25,726,000,000,000,000,000,000 molecules, which enter into the 1c. c. of nitric acid. The cube root of the above number is about 29,500,000, so that according to this estimate if the molecules of nitric acid fill the entire space in the 1c. ¢., so that there are no vacant spaces between the molecules, then a molecule of the above gases is, on the average, about 1/59,500,000 Of a centimetre in diameter, which is about 1/73,750,000, Of an inch. One cubic centimetre of water is composed of 1258 ce. c. of hydrogen and 629 c. c. of oxygen—in all, 1887 cubic centimetres. Estimating, as in the case of nitric acid, 19 quintillions of molecules in each cubic centi- metre of gas at O° C and the pressure of one atmos- phere, there would be 35,853,000,000,000,000,000,000 molecules of the two gases inl c.c. of water, which would allow an average diameter of about 1/33,000,000 MATTER 19 of a centimetre, or about 1/s2,500,000 of an inch, if water is not porous. In a similar way for solids—taking ammonium nitrate, N Hi N Os, for example, one cubic centi- metre of which contains 2,083 cubic centimetres of its three constituent gases, the number of molecules in 1c. c. of the solid would be 39,577,000,000,000,000,- 000,000, and the average diameter of the molecule, if the solid is not porous, would be 1/ss,000,000 of a cen- timetre in diameter, or about '/s5,000,000 of an inch. Taking another solid, ammonium bicarbonate, N H4 H C Os, we estimate the size of the molecules of its elements to be about 1/s4,500,000 of a centimetre, or about 1/s¢,250,00 of an inch. In this estimate the substances were taken in the simple form and the carbon was assumed to occupy the same space that it would occupy if it had the specific gravity of the diamond. Instead of the above method, we may regard the N Hs HC Os as being composed of the two gases N Hs; and C O2 and of water, H:O. The average size of the molecules of these three compounds is about 1/23,500,000 centimetre, or +/72,500,000 of an inch. The above estimates of the sizes of molecules, as already stated, are made upon the assumption that solids and liquids are not porous, or that there are no vacant spaces between the molecules. That there are such spaces, however, is evident from the fact that both solids and liquids can be com- pressed into smaller volumes than they occupy at O°C, and from the fact that they contain heat, which forces the molecules apart. I think, however, that the vacant spaces between the molecules of a solid are small compared to the space occupied by the molecules themselves. It seems probable that at the absolute zero, namely, 20 ORGANIC EVOLUTION CONSIDERED —273.7 CO, if this represents the temperature at which all heat is absent, there is no molecular motion in matter, and that the molecules, if they are cubes of equal size, would fill the whole space so that there would be no pores. The small amount of expansion which solids and liquids undergo, due to a change of temperature, shows that if they could be reduced to the absolute zero, they would occupy nearly as much space as they occupy at O°C. For example, a cubic centimetre of steel on being cooled from O° C to —273° C would lose about 1/1 of its volume if it followed the law of expansion and contraction which has been established for higher temperatures, Glass would lose 1/125 and zinc 1/» of its volume. From this it would seem that the molecules of solids at ordinary temperatures are probably very close together, and, for the most part, in contact with each other. Lord Kelvin estimates from the kinetic theory of gases that in glass or water ‘‘there are probably some- thing like 600 molecules to the wave-length ”’ of violet light, ‘‘ and almost certainly not fewer than 200, or 300, or 400.’’* Taking 600 as the number of molecules of water in a wave-length of, violet light, which is about 1/2,500 of a millimetre in length, the size of the molecule of water would be about 1/45,000,00 of a centimetre, or 1/37,500,000 Of an inch in diameter,—or, more accurately, this would be the average distance between the centers of adjacent molecules. The thickness of the film of the soap bubble at the ‘dark part, just before it breaks, is said to be 1/s the length of the sodium wave of light, which is equal to 1/s17,00 of acentimetre, or about 1/2,118,000 of an inch. This represents the thinnest portion of matter that has *Popular Lectures and Addresses, by Sir W. Thomson, p. 193. MATTER 21 been measured. It is evident that the diameter of the molecules of water and soap cannot exceed the thick- ness of the film. Regarding the molecule of soap as made up of fifty atoms,—for example, sodium pal- mitate, the formula of which is Cis Hs: C Oz Na, exact- ly fifty atoms; then, if the black film of soap bub- ble contains only one layer of molecules of soap together with sufficient water to make the thickness fifty atoms, the size of the atoms, or, rather, the average distance from center to center of atoms, would be */12,350,00 of acentimetre. Of course, it is impossible to tell the number of atoms or molecules contained in the thinnest part of a soap bubble. The only definite conclusion is that the diameter of the molecules in the particular case cannot exceed the thickness of the film, and that the diameter of the atoms must be con- siderably less than the thinnest part of the film. Thus far I have spoken of simple substances and of the size of atoms and molecules. It is evident that, if there are but seventy simple substances known, most things with which we are acquainted must be compounds. A.compound is produced by the union of two or more simple substances. For example, thoroughly mix 32 parts by weight of sulphur with 56 of iron filings, and ignite the mixture with a burning match. The whole mass, even in the absence of air, will soon glow with heat and light. The weight of the result- ing mass is equal to that of the sulphur plus that of the iron. The heat and light were produced by the chemical action of the sulphur and iron on each other. The atoms of the two substances rushed together with such enormous velocity that intense heat and light were generated by the concussion, as is done when the motion of a cannon ball is arrested by a steel-clad 22 ORGANIC EVOLUTION CONSIDERED vessel. An atom of sulphur and an atom of iron throughout the mass—atom for atom—crash together and hold each other in their grasp. The result of the chemical action is a new substance that looks like neither sulphur nor iron. Before the burning match was placed in the mixture the sulphur and iron could be readily separated by mechanical means—the iron could be removed with a magnet, or the sulphur could be dissolved out with bisulphide of carbon. The compound formed looks like neither sulphur nor iron, and its mechanical and chemical properties are different from those of the two elements that compose it. The whole of the two elements used is present in the compound, known by the name, sulphide of iron, and by various chemical means they may be separated from each other and obtained again in the simple form. The smallest amount of this compound that can exist is represented by one atom of sulphur com- bined with one atom of iron, which is expressed by the formula Fe 8. This smallest conceivable amount of a compound is called by the chemist a molecule. A single molecule may contain from two up to hundreds of atoms. The molecule is the unit of the compound on which its qualities as a distinct substance depend. We are unable to tell in advance from the proper- ties of the elements what will be the properties of the compounds produced by their union. How totally we would be unable to predict that by putting a spark to a mixture of two volumes of hydrogen and one volume of oxygen they would unite with a tremendous explosion to form a volume of water more than eighteen hundred times less than that of the two gases; or that by decomposing common salt we would find it composed of a soft metal and a very poisonous MATTER 23 gas; or that by uniting sulphur and carbon, two solids, we would obtain a very volatile liquid of an extremely unpleasant odor; or, again, that by the union of one volume each of nitrogen and chlorine together with four volumes of hydrogen—all three of them gases—we would obtain a white solid, known as chloride of ammonium. Examples might be multiplied indefinitely, but these few are sufficient to show how widely different are the properties of compounds from the proper- ties of their constituent elements. All material things with which we are acquainted, the thousands of different objects upon the earth, are built of a few primary building materials. As infinite varieties of houses may be built of stone, and brick, and mortar, so countless varieties of com- pounds may be built of atoms of a few different kinds. The same atom may be made to do many different kinds of service. It is indeed an amazing fact that the primary building materials of the earth and of the other worlds which have revealed thier composition, at least partly, through the spec- troscope, are but a few kinds of atoms, and that these atoms are inconceivably small. And yet each atom is subject to definite and invari- able laws. The laws of the material universe are the laws of atoms. Atoms are the law-abiding citizens of the universe; they do their work with absolute precision. The fundamental laws of chemistry are mathematically exact. For example, take the law of ‘definite propor- tions,’’ that in every chemical compound the. kinds and relative quantities of the constituent elements are fixed and invariable. One correct analysis of pure water determines the composition of all water in existence. The chemist cannot believe that the 24 ORGANIC EVOLUTION CONSIDERED composition of water can vary by a single atom of either of its elements. He feels certain that the rule is infallible that each molecule of water must contain two atoms of hydrogen and one atom of oxygen, and that it can have no other composition. The same principle holds good of every other com- pound. Again, it often occurs that the same elements unite in different proportions to form different com- pounds, and, in these cases, they unite according to the law of ‘‘multiple proportions,’’ namely, that when two elements, A and B, unite in more than one proportion, if we take quantities of the compounds which contain the same amount of A, the quantities of B will bear avery simple relation to each other. For example, take the compounds of nitrogen and oxygen represented by the following five formulas, No O, Ne On, Ne Os, Ne Oz and Ne Os. It will be noticed that while each compound has two atoms of nitrogen in its molecule, the amounts of oxygen are simple multiples of the qtiantity in the first com- pound. The formula for water is Hz O, but there is another compound of oxygen and hydrogen, Hz Os, known as hydrogen dioxide, which is a very active oxydizing agent. Chemists have determined with great exactness the relative weights of atoms. I shall not describe the methods by which this has been done. Hydro- gen being the lightest known substance, its atomic weight is taken as unity. The atomic weights of the seventy elements range from 1 to 239, the latter being the atomic weight of uranium. It is a remarkable fact that when elements combine with each other, their amounts are represented by their atomic weights or by some multiple of these MATTER 25 weights. Oxygen, for example, unites with every element except fluorine, and with most elements in more than one proportion, and yet the amount of oxygen in any compound is always its atomic weight, 16, or some multiple of this weight. This renders it possible for the chemist to represent every compound by means of a formula which contains a definite num- ber of atoms. A formula, such as that of water, He O, shows the kinds of elements, hydrogen and oxygen; the number of atoms of each element in the molecule, two of hydrogen and one of oxygen; and the relative weights of the two elements. The two atoms of hydrogen weigh 2 and the one atom of oxygen weighs 16. The weight of the molecule, He O, is equal to the sum of the weights of its atoms— 2 plus 16 equal 18. We know therefore, by examin- ing the formula that 7/13 of the weight of water is H and 16/1 O. When we consider the countless number of com- pounds that may be formed by the union of the sey- enty elements, ranging from the molecule of only two atoms up to the most complex molecules, which con- tain a half dozen or a dozen elements and hundreds of atoms, and find that in every compound the law of combination according to atomic weights is ob- served, the fact is marvelous. Who numbers the atoms that they may combine? Who wheels them into line by twos, by tens:or by hundreds and binds them together? The power of the Infinite is upon them, for they are infinitely perfect in their workings. The hand that upholds and guides the earth and planets and the countless worlds that revolve through infinite space, guides the atoms of which all these worlds are made. What a wide and marvelous range of functions has been bestowed upon certain elements! Carbon isa 26 ORGANIC EVOLUTION CONSIDERED remarkable example which shows the almost unlim- ited possibilities of an element in helping to build structures of the most wonderful and diverse kinds. In its uncombined crystalline condition, it constitutes the diamond, the hardest of all known substances. In a second form it is known as graphite, or black lead, and in other forms as charcoal and lampblack. This hardest of all elements helps to form a countless number of compounds, some of which are gases, other liquids, and still others are solids. It is a neces- sary constituent of every plant and animal. It is found in the gas, carbon dioxide, which is a necessary food of plants. The same gas unites with many bases to form the many mineral carbonates that exist in nature. It isa part of a vast number of organic compounds which are of the highest importance to man and in the economy of life. Among these com- pounds are starch, cellulose, the various sugars, the many organic acids, the alkaloids, such as those in quinine, morphine and strychnine, the alcohols, the different fats and oils, and the numerous essential oils, and the long lists of hydrocarbons. These are but a few of the great number of compounds which carbon helps to form. So important is this element that the great branch of organic chemistry is often called the chemistry of the compounds of carbon. In many compounds carbon is combined with hydrogen alone, in many’ more with hydrogen and oxygen, and in a large number it is united with hydro- gen, oxygen and nitrogen. It is indeed marvelous [that these four elements, which constitute the great bulk of the organic world, can, by uniting in different ways, produce the vast number of compounds that constitute the great science of organic chemistry. Carbon and hydrogen alone unite to form several MATTER 27 long series of homologous compounds, and it is a most remarkable fact, that in the compounds of one series the elements exist in the same relative amounts. For example, the following six formulas of this series show that there are twice as many atoms of hydrogen as of oxygen in each compound. C2 Ha, C3 He, Cz Hs, Cs. Hy, Cs He, C7 Hu. The analysis of any one of these compounds shows that there is by weight six parts of carbon and one of hydrogen, and from this it might. seem that.one formula would serve for each of the six compounds, and yet the chemist is certain from the specific gravities of the vapors of these compounds that the above are the correct formulas. But more remarkable than the above is the fact. that sometimes different compounds must be repre- sented by the same formulas. For example, several different compounds have the formula Cs Hi, and others the formula C, Hz Cle. In these cases of isomerism the molecular weights of the substances are the same, and we can only account for [the difference in the properties of the compounds by assuming that the atoms are combined in them in different ways. We can easily imagine that the fifteen atoms in the formula Cs; Hio might be differently grouped with each other so as to form compounds of different qualities, on the same principle that fifteen blocks of two different kinds might be arranged in different ways. I may here state that there is no distinction be- tween Organic and Inorganic Chemistry. It was formerly thought that organic compounds could not be produced artificially from the elements or from inorganic substances, but that they could be built up by living organisms only, or produced from matter organized by plants and animals. Chemists have, 28 ORGANIC EVOLUTION CONSIDERED however, especially in recent years, succeeded in manufacturing from the elementary substances them- selves, or from inorganic compounds, a good many carbon compounds which are obtained from organic matter, or which are produced by plants and animals. And yet it is true that the processes of manufacture, as carried on artificially on the one hand, or by the living being on the other, are probably widely differ- ent from each other. It is probable that the life force of the living being is something more than the properties of the inorganic elements, and that it proceeds according to methods that cannot be fol- lowed in the laboratory. This seems the more probable when we remember that but few carbon compounds that exist in living beings have been artificially produced, and that we know almost noth- ing of the methods by which organic beings produce the great multitude of very complex organic com- pounds. It is beyond the truth for the chemist to _ claim that, in manufacturing a few carbon com- pounds in the laboratory, he is imitating the pro- cesses carried on in the living world. It is evident that the living organism uses methods which are un- known to the chemist, and which it is not probable can ever be imitated. I need not say that no organized form of matter has ever been produced artificially. The chemist, I presume, does not even dream that he will ever be able to manufacture from the elements albumen like the white of an egg, nor a nerve fibre, nor cell, nor a grain of corn. While the power of the chemist in manufacturing carbon compounds must certainly be regarded as one of the great triumphs of science, yet it must be admitted that it amounts to but little when compared to the work of living plants and animals. MATTER 29 I make the above remarks because there are those who seem to imagine that the chemist in the labora- tory may imitate the great multitude of wonderful and unknown processes which are carried on in the living world, and that the laboratory, by the use of inorganic materials, may supersede the organic world in the manufacture of carbon compounds. A fundamental doctrine in chemistry is that matter cannot be destroyed. The chemist relies on this as a well-established fact. We know of no method by which to destroy a single atom of matter. The chemist may separate substances from each other, or he may cause them to unite by bringing them together under certain conditions; he may change substances from the solid to the liquid and from the liquid to the gaseous condition; he may render matter invisible, or the reverse, but he cannot destroy it. The indestructibility of matter is shown not only by experiment, but also by the fact that the mind of man is totally unable to conceive that something may be- come nothing. Ii. FORCE. In this chapter I will consider briefly some of the forces of nature. Force may be defined as that which can put matter in motion. Among the forces of nature may be mentioned light, heat, electricity, magnetism, chemical affinity, cohesion, adhesion, and gravitation. Forces act upon bodies in two ways—they cause bodies to approach or to recede from each other; to attract or to repel. As examples of the former, chemical affinity binds atoms together to form molecules; cohesion causes like atoms or molecules to cling together to form masses of matter; gravitation causes each atom in the universe to attract every other atom in the universe; and magnetism causes the magnet to attract iron or steel. Heat, which causes bodies to expand, thereby sepa- rating more widely their molecules, generally acts as a repellant force. The like poles of magnets, bodies electrified alike, and currents of electricity in unlike directions repel each other. Some forces act only at imnsensible distances. Chemical affinity, adhesion, and cohesion are exam- ples. Gravitation acts at all distances. No limit can imagined at which two bodies cease to attract each other. Our knowledge of force is derived from its effects on matter. Matter in motion shows force at work. 30 FORCE 31 The lifted weight and the bent spring represent forces ready to do work. It is assumed that energy is indestructible. The quantity of energy in the universe is constant. When one form of energy disappears it has become one or more other forms of energy. Coal is burnt under a boiler. Chemical affinity causes the atoms of oxygen of the air and the atoms of the fuel to rush together with such enormous velocity as to generate a large quantity of heat. This heat increases the motion of the molecules of water until they are forced wide apart in the form of steam, and the expanding steam gives mechanical motion to the engine. The engine runs a dynamo, thereby con- verting some of its energy into electricity and mag- netism, and the electricity is conveyed to a distant motor and is converted into magnetism and mechan- ical energy to run a car. Some of the electricity is converted back into heat, and some into light; or, again, it may be made to separate the atoms which united to generate the original heat. Thus chemical’ force, mechanical force, electricity, magnetism, light, and heat are seen to be in succes- sion manifestations of the same energy. I need hardly say that the correlation of the different forms of energy is one of the greatest discoveries of modern science. All forms of energy seem to be essentially one. Each may. be converted into any of the others. And so the problem of energy is simplified; and yet it should be remembered that the highest powers of the human mind have been and are being taxed in endeavoring to explain the methods by which the forces of nature produce their results. Some of the problems involved are so subtle that it seems hardly possible that they can ever be solved. How shall we explain magnetism, clectricity, light, 32 ORGANIC EVOLUTION CONSIDERED heat, and gravity? This question involves many diffi- culties, some of which are probably unanswerable. Sound is known to be the vibration of air or other material media, and the pitch depends on the fre- quency of the vibrations. The lowest audible note is produced by 20 to 30 vibrations per second, and it is said that some ears can appreciate sounds made by 50,000 vibrations per second. The length of waves produced by 16 vibrations per second is about 70 feet, and the wave length due to 50,000 vibrations is about 3/, of an inch. The production of waves of sound requires an elastic medium. The medium, air for example, propagates sound by a series of longitudinal vibrations of the molecules of air, resulting in a series of condensations followed by rarefactions. Sound is one form of mechanical energy which is transmitted by means of waves through elastic mate- rial media,—at the rate of about 1,100 feet per second through air, at the ordinary temperature, but more rapidly than this through liquids and solids. How can we explain the transmission of other forms of energy? of heat and light and gravitation through interstellar space? the motion of heat and electricity through material media? the attraction of magnets, and the drawing of atom to atom in chemical action? It should be remembered that all matter is por- ous—that between the molecules of all gases, liquids and solids are spaces which are not occupied by any known form of matter. If these intermolecular spaces are an absolute vacuum, then we are left to account for the transmission of energy through a vacuum. If we heat one end of an iron rod, the heat slowly creeps along until the whole rod becomes hot. In this case we may assume that the molecules of the end first heated are thrown into more rapid vibration, FORCE 33 and that by concussion they communicate their energy to the neighboring atoms. The rate of trans- mission of heat in this way would be, at most, a few feet per hour. But radiant energy, such as the light and heat of the sun, flash through space at the rate of 186,000 miles per second. Electricity travels through a conducting wire thousands of miles in a second, and it is even claimed that it sometimes travels with the velocity of light. As to the velocity of gravitation and other forms of attractive energy, we are entirely ignorant. We now inquire, Can energy manifest itself through an absolute vacuum? Our knowledge of energy is that it is connected with matter, and manifests itself in and through mat- ter, and not independently of it. Shall we, therefore, assume that all space is full of matter, and that the energy of sun and stars is con- veyed through infinite space by means of some kind of universal medium? The theory now accepted by all physicists is that there is a medium, ether, not composed of ordinary matter, which fills all space except that occupied by the atoms of ordinary kinds of matter. It permeates all gases and liquids and solids, occupying the spaces between their molecules. The belief in the existence of such a medium has been forced upon physicists for reasons so weighty that all have been led to accept it. First, it is impossible to conceive the action of energy through an absolute vacuum. Newton felt the difficulty of trying to explain the action of gravity through a vacuum, and wrote as follows on the sub- ject: ‘“*That gravity should be innate, inherent, and essential to matter, so that one body may act on 3 34 ORGANIC EVOLUTION CONSIDERED another at a distance through a vacuum, without the mediation of anything else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man who has in philosophical matters a compe- tent faculty of thinking, can ever fall into it. Grav- ity must be caused by an agent acting constantly according to certain laws; but whether this agent be material or immaterial, I have left to the consid- eration of my readers.’’* Again he writes in his queries: ‘‘Qu. 21. Is not this medium much rarer in the denser Bodies of the Sun, Stars, Planets, and Comets, than in the empty celes- tial Spaces between them? And in passing from them to great distances, doth it not grow denser and denser perpetually, and thereby cause the gravity of those great Bodies towards one another, and of their parts towards the bodies; every body endeavoring to go from the denser parts of the Medium towards the rarer? For if the Medium be rarer within the Sun’s Body than at its surface, and rarer there than at the hundredth parth of an Inch from its Body, and rarer there than at the Orb of Saturn, I see no reason why the increase of density should stop anywhere, and not rather be continued through all distances from the Sunto Saturn and beyond. And though the increase of density may at great distances be exceeding slow, yet if the elastic force of the medium be exceeding great, it may suffice to impel Bodies from the denser parts of the Medium towards the rarer, with all that power which we call Gravity. And that the elastic force of the Medium is exceed- ing great, may be gathered from the swiftness of its vibrations,’’ etc.f *On Light, by Stokes, p. 16. +Modern Views of Electricity, by Lodge, p. 406. FORCE 35 *©Qu. 22. May not Planets and Comets, and all gross Bodies, perform their motions more freely, and with less resistance in this Aetherial Medium than in Fluid, which fills all Space adequately without leaving any Pores, and by consequence is much denser than quicksilver and gold? And may not its resistance be so small as to be inconsiderable? For instance, if this Aether (for so I call it,) should be supposed 700,000 times more elastic than our Air, and about 700,000 times more rare, its resistance would be above 600,000,000 times less than that of Water. And so small a resistance would scarce make a sensible alter- ation in the Motions of the Planets in ten thousand years,’’ etc.* I quote the above to show that Newton regarded a medium as necessary in order to explain the action of gravity. I may here remark that of all the forces of nature, gravity is least understood as to its method of action. No theory has been offered that meets the difficulties involved. : The belief in the existence of ether, a universal medium, has grown out of facts connected with light. It is now admitted by the scientific world, that light consists of the vibrations of ether that can be recog- nized by the eye. While the vibrations of matter which produce audible sounds are limited to about 50,000 per second, the vibrations of ether which pro- duce red light are 370 trillions, and violet light 739 trillions per second; and beyond the violet are invis- ible rays that vibrate at astill higher rate, while below the red are rays of heat which have a slower rate of vibration than the rays of light. In the solar spectrum, produced by the passage of the sun’s rays through a prism, we find heat, light *Modern Views of Electricity, by Lodge, p. 406. 36 ORGANIC EVOLUTION CONSIDERED consisting of all the colors of the rainbow, and invis- ible rays beyond the violet, all arranged in definite order according to their rates of vibration. As in music the different notes depend on different rates of vibration of air, so the different colors are due to the different rates of the vibrations of ether. ‘We know from experience that many notes may be sounded at once and all be audible to the ear. The air as a medium responds readily at the same time to many different rates of vibration, so that the ear can distinguish them as separate notes. So ether responds to the many rates of vibration which are necessary to produce the heat and light and actinic rays that reach us from the sun. We some- times speak of the seven colors of the rainbow, but this is simply a convenience, for the number is indef- initely great. They shade so gradually one into another in the rainbow that it is impossible for the eye to draw definite lines between them. This vast number of colors, together with the multitude of rates of vibrations that represent the different de- grees of heat and of actinic rays, show that the motions of the ether, as represented in the rays of the sun, are inconceivably complex. And when in addition to this we remember the fact that hundreds of thousands of stars have been seen, and that in order to see them the ether must respond at one and the same time to separate vibrations from all of these bodies scattered through infinite space, the methods of vibration become infinitely complex. Instead of waves like those of sound, varying from half an inch to 70 feet in length, we find from forty thousand to sixty thousand waves in the length of one inch. How infinitely delicate must be the organ of sight that it may appreciate such extremely small disturbances of a medium so subtle and attenuated FORCE 37 that all the science and ingenuity of man have failed to reveal its existence as matter! And yet scientists feel sure that ether reaches from the earth to the most distant star from which light has ever reached us. Marvelous indeed is the fact that there are visi. ble stars so distant from us that it requires thousands of years for their light, traveling at the rate of 186,000 miles per second, to reach the earth! And yet the waves of light are flashed across infinite space, and travel on and on for ages without being lost, through anether that is being perpetually agitated in every conceivable direction and manner by the ceaseless vibrations of countless worlds. We look upon the telegraph and telephone as being wonderful means of communication—which they truly are—but light and heat flow with ceaseless activity from world to world with no visible means of transit through infinite space. The existence of life on the earth is rendered possible by the fact that the sun’s light and heat are poured through ninety-two millions of miles of space that must be, so far as ordinary matter is concerned, an almost absolute vacuum. It may be asked, why assume the existence of a uni- versal medium? In answer to this it may be said that, from the transmission of sound through air and other media, and the transmission of heat and electricity through conductors, it might seem that a medium is necessary in order to convey energy through space. And yet it may be said that the qualities which are assigned to ether are so different from those of ordi- nary matter that analogy fails. But still the human mind is left helpless in the presence of the question as to how energy can pass through an absolute vacuum. It therefore assumes the existence of a medium. In addition to this, the various facts connected with 38 ORGANIC EVOLUTION CONSIDERED light,—refraction, diffraction, polarization, colors shown by films,—can only be fully explained by the undulatory theory which necessarily involves a medi- um. Besides, this theory easily explains the differ- ent colors of light, the differences in the qualities of heat, and the ultra violet invisible rays. In order to explain the polarization of light, it is necessary to assume that the ether vibrates trans- versely to the line of radiation, instead of longitudi- nally, as in the case of sound. What, then, must be the properties of a medium which can transmit radiant energy at the rate of 186,000 miles per second by means of transverse vibrations? Among the various authors who have expressed their views as to the nature of ether, no one stands higher than Lord Kelvin. He expresses his views in the following language: ‘¢ What we know of the luminiferous ether is that it has the rigidity of a solid and gradually yields, Whether or not it is brittle and cracks, we cannot yet tell, but I believe the discoveries in electricity and the motions of comets and the marvelous spurts of light from them, tend to show cracks in the luminiferous ether—show a correspondence be- tween the electric flash and the aurora borealis and cracks in the luminiferous ether. Do not take this as an assertion, it is hardly more than a vague scien- tific dream; but you may regard the existence of the luminiferous ether asa reality of science; that is, we have an all-pervading medium, an elastic solid, with a great degree of rigidity—a rigidity so prodig- ious in proportion to its density that the vibrations of light in it have the frequencies I have mentioned, with the wave-lengths 1 have mentioned. The fun- dameutal question as to whether or not luminifer- FORCE 39 ous ether has gravity has not been answered. We have no knowledge that the luminiferous ether is attracted by gravity; it is sometimes called impon- derable because some people vainly-imagine that it has no weight. I call it matter with the same kind of rigidity that this elastic jelly has.’’* “The luminiferous ether is an elastic solid for which the nearest analogy I can give you is this jelly which you see.’’t ‘“¢Now what is the luminiferous ether? It is mat- ter prodigiously less dense than air—millions and millions and millions of times less dense than air. We can form some sort of idea of its limitations. We believe it is a real thing, with great rigidity in comparison with its density; it may be made to vibrate 400 million, million times per second; and yet be of such density as not to produce the slightest resistance to any body going through it.’’f He has also assigned to it a density which makes one cubic centimeter weigh .000,000,000,000,000,- 000,936 grain. ‘This density, although about the same as that of the atmosphere at the height of 340 kilometers, is yet enormously great as compared with that which air would assume in interstellar space. The rigidity of the ether, according to the same authority, is approximately one thousand-mill- ionth of that of steel; so that masses of ordinary mat- ter can pass through it readily.’’§ Lodge speaks of it as ‘‘a perfectly continuous, sub- tle, incompressible substance pervading all space and penetrating between the molecules of all ordinary matter which are imbedded in it and connected with one another by its means. And we must regard it as the one universal medium by which all actions be- * Popular Lectures and Addresses, by Sir W. Thomson, pp, 328, 329. t Ibid, p. 327. } Ibid, 347. § Barker’s Physics, p. 366. 40 ORGANIC EVOLUTION CONSIDERED tween bodies are carried on. This, then, is its func- tion—to act as the transmitter of motion and energy.’”* ‘As far as we know, it appears to be a perfectly homogeneous, incompressible, continuous body, in- capable of being resolved into simpler elements o1 _atoms; it is, in fact, continuous, not molecular. ‘* Gravitation is explainable by differences of pres- sure in the medium, caused by some action between it and matter not yet understood. Cohesion is explain- able also, probably in the same way. ‘Light consists of undulations or waves in the medium; while electricity is turning out, quite possi- bly, to be an aspect of a part of the very medium itself.’’ + ‘¢One continuous substance filling all space; which can vibrate as light; which can be sheared into posi- tive and negative electricity; which in whirls consti- tutes matter, and which transmits by continuity, and not by impact, every action and reaction of which matter is capable. This is the modern view of the Ether and its functions.’’{ ‘*The vibrations of light are not such as can be transmitted by a set of disconnected molecules; if by molecules at all, it must be by molecules connected into a solid; ¢.e., by a body with rigidity. Rigidity means active resistance to shearing stress, 7. e., to alteration in shape; it is also called elasticity of figure ; it is by the possession of rigidity that a solid differs from a fluid. For a body to transmit vibrations at all, it must possess inertia; transverse vibrations can only be transmitted by a body with rigidity. All matter possesses inertia, but fluids only possess volume elasticity, and accordingly can only transmit longitudinal vibrations. Light consists of transverse * Modern Views of Electricity, by Oliver J. Lodge, p. 339. + Ibid, 338. t Ibid, p. 358. FORCE 41 vibrations; air and water have no rigidity, yet they are transparent, 7. e., transmit transverse vibrations; hence it must be the ether inside them which really conveys the motion, and the ether must have proper- ties which, if it were ordinary matter, we would style inertia or rigidity. No highly rarefied air will serve the purpose; the ether must be a distinct body. Air may exist, indeed, in planetary space, even to infinity, but if so, it is of almost infinitesimal density com- pared with the ether there.’’* ‘*So at a height of only 4,000 miles above the sur- face, the atmospheric density is a number with 127 ciphers after the decimal point before the significant figures begin.’’ The density of ether, as calculated by Sir William Thomson, is represented by a decimal ‘with only 17 ciphers before the significant figures. In interplanetary space, therefore, all the air that exists is utterly negligible; the density of the ether there, though small, is enormous by comparison.”’ It is known that ordinary forms of matter are not necessary for the transmission of light, for it passes readily through the most perfect vacuum. It also passes through the diamond—the hardest known solid, but with less velocity than through the vacuum. If ether serves as a medium for light in a vacuum, it is probable that it also serves as a medium in the diamond. There is nothing to justify the con- clusion that the molecules of a transparent solid serve as a medium for radiant energy. The high rate of speed at which light traverses such bodies excludes the belief that solids act as conductors of light as they do of heat. The following are some of the conclusions with regard to ether: * Modern Views of Electricity, by Oliver J. Lodge, p. 340. 42 ORGANIC EVOLUTION CONSIDERED It occupies all space except that occupied by atoms of matter. It must be capable of transmitting light at the rate of about 186,000 miles per second. It must offer almost no resistance to the motions of the heavenly bodies, for we know that the earth has been moving through it for millions of years without having its motion destroyed—it is now mov- ing at the rate of about 19 miles per second. It must be non-condensible by gravity, for if it could be thus condensed, as can our atmosphere and all other gases, it would be too rare in interstellar space to transmit radiant energy by transverse vibra- tions. This makes it necessary to assume that it isa continuous substance, 7. e., that there are no vacant spaces between the atoms of ether, unless it should be assumed that it is a substance which is free from gravity. With freedom from the effects of gravity we might imagine ether to be uniformly distributed through all space, and composed of molecules that are not in contact, 7. e., that ether is porous. However this may be, ether must possess great rigidity compared with its density in order that it may transmit transverse vibrations. It must be capable of receiving and transmitting the vibrations of the atoms and molecules of ordin- ary matter. The different kinds of heat and light represent different rates of vibration of atoms and molecules. Radiant energy displays the activity of atoms and molecules,—in dealing with it we have to do with the properties of elements. The spectroscope reveals the fact that in studying light we gain a knowledge of the qualities of the atoms of matter. Light might be called the music of vibrating atoms. White light is the perfect har- mony of all the vibrations of light. FORCE 43 Ether must not only receive vibrations from atoms, but it must impart them to other matter. The earth is dependent on the mechanical work done by the radiant energy of the sun. The fact that it requires force to move ether and that ether in motion can impart motion to matter, indicates that ether possesses inertia. It is evident that if ether is composed of atoms they must be vastly smaller than the atoms of ordin- ary kinds of matter, since it permeates the hardest solids. Thus we have in ether a hypothetical substance which has never been detected as matter,—which, in fact, must be extremely different in its properties from any known form of matter. All modern physicists have assumed the existence of ether as a necessary medium for the transmission of radiant energy, and also of other forms of energy. Science is driven to assume the existence of a uni- versal medium, and, without the aid of analogy, in order to perfect her theories. She regards the exist- ence of ether as certain—as a matter no longer to be called in question. And so we may rest in the conclusion that nearly all space is filled with an infinitely subtle substance which possesses marvelous properties, which are, for the most part, extremely different from those of ordinary matter. If ether is a continuous substance, then no part of space is an absolute vacuum—the atoms of matter and of ether completely fill all space. With space thus filled we are relieved of the neces- sity of assuming that force is transmitted through a vacuum. With ether as a universal medium can we explain the action of the various forces? Can gravity, mag- 44 ORGANIC EVOLUTION CONSIDERED netism, electricity and chemical affinity be thus ex- plained? Do motions of ether account for the action of each of these forces? , When we speak of ether as a medium for the trans- mission of force, we exclude the idea that ether itself is energy. Force is, by definition, that which can put matter in motion, and in defining matter we would be obliged to include ether. The existence of ether gives us no conception of force itself, but it simply serves to explain the transmission of certain-forms of energy. As to gravity, we can yet form no adequate concep- tion. What sort of motions and distributions of an almost infinitely thin, non-resistant material like ether, will explain gravitation? The mind can form no adequate conception as to how the motion of ether will account for this force. It would seem that ether, which offers no perceptible resistance to the motions of the planets, is entirely inadequate as a medium to explain the action of gravity. That one body may put another in motion implies inertia and resistance in both. We know that a body falling towards the earth soon acquires a great velocity. What adequate reason have we for believing that moving ether is’ pushing the falling body? or that the pressure of ether is greater on one side of the falling body than on the other? It is true that Newton and others have felt it neces- sary to assume the existence of ether in order to explain gravity, and yet, with ether as a medium, the human mind has made no progress in formulating an adequate theory of gravity. If we consider chemical affinity which binds atom to atom to form molecules, the method of action is as uncertain as that of gravity. Indeed, Sir W. Thomson seeks to explain capillary attraction by the FORCE 45 law of gravitation. He says, ‘* Until we see how gravity itself is to be explained as Newton and Fara- day thought it must be explained, by some continuous ‘action of intervening or surrounding matter, may we not be temporarily satisfied to explain capillary at- traction merely as Newtonian attraction intensified in virtue of intensely dense molecules movable among one another, of which the aggregate constitutes a mass of liquid or solid.’’* Again he says, ‘* Hence, unless we find heterogen- eousness and the Newtonian law of attraction incapa- ble of explaining cohesion and capillary attraction, we are not forced to seek the explanation in a devia- tion from Newton’s law of gravitational force.’’t May we regard the attractions of molecules and atoms as due to the force of gravity acting at insensi- ble distances? When a mixture of one volume of oxygen with two volumes of hydrogen explodes to form water, is it due to the fall of these atoms against each other, produced by gravitation? If we answer in the affirmative, the answer is simply an unknown quantity. If we seek to explain how ether acts as a medium in chemical affinity, we fail to do so. It may be that electric currents are ether in motion through certain media, and that magnetism is due to ether moving in vortices. Magnetism acts readily through a vacuum and through solids, liquids, and gases. Neither the total absence of matter nor the presence of the densest solids interferes with its action. It may be that the motions of ether will explain the facts of magnetism. In fact, we are compelled to choose between ether and an absolute vacuum in explaining the action of all attractive forces. Shall we accept the theory that a * Popular Lectures and Addresses, pp. 9,10. + Ibid, p. 4. 46 ORGANIC EVOLUTION CONSIDERED substance can exist all around and in us which we cannot detect with any of our senses, or shall we believe that energy can pass through a vacuum? We know that matter may exist in such conditions that it does not appeal to our senses. When the atmosphere in which we live is perfectly quiet it excites no one of our senses, and we are unconscious of its existence. If this is true of matter so dense as our air, it can easily be imagined that a substance might exist so attenuated as to escape our senses. We cannot weigh ether, because we cannot exhaust it from a vessel, owing to the fact that it passes readily through the densest solids; nor can we, for the same reason, con- dense it. It may be said, however, that ether in motion as light, heat and electricity, appeals to the senses. We must, in fact, believe in the existence of ether unless we choose to fall back upon the corpuscular theory of radiant energy—a theory which totally fails to explain many of the phenomena of light. We conclude, therefore, that all space in the uni- verse is filled with matter and ether, every atom of which is in constant agitation; that each can receive motion from, and impart motion to, the other, and that by means of ether as a medium, the radiant energy of the universe may be distributed through space with the velocity of light. According to this view all physical energy is held by matter and ether. Matter is continually imparting its radiant energy to ether. Must not the time finally come when all the energy of matter which can be radiated will be imparted to ether and dissipated through infinite space? The quantity of matter in the universe is finite, and consequently the quantity of energy in this matter is finite. It cannot, therefore, require infinite time in which to part with its radiant energy. Owing FORCE 47 to the radiation of energy it would seem that sun and stars and all material things must finally become dark and cold. Even if we claim that the concussion of falling bodies generates the light and heat of the universe, yet it is evident that with infinite time a finite number of finite quantities of matter must do their work and part with their energy. Looking backward we might ask, If sun and stars have existed through an infinite past, how is it possible for them to be in their present highly heated condition? We know that they are material bodies, and that, like other bodies of matter, they must part with their heat and light. It is evident, therefore, that they cannot have had their present high temperatures through an infinite past. The present high tempera- ture of the sun has, according to any physical theory, been maintained but a few millions of years at most. _ The vast sums of energy in matter have in some way been stored up there within finite time, and the finite future will serve to dissipate this energy through infinite space. It may be claimed that past time is infinite, that matter has existed during the infinite past, and that, consequently, the fact that much of it is so highly heated is evidence that worlds may be kept glowing with light and heat through an infinite future. In answer to this we may say that we know of no phys- ical means by which a finite quantity of matter, sur- rounded by an infinite quantity of ether, could be kept hot through infinite time—and this for the rea- son thut the light and heat of this matter would be radiated into infinite space, with no known method by which they could again be concentrated in matter. The present concentration of energy in matter, as we see it in the sun and stars, has taken place within 48 ORGANIC EVOLUTION CONSIDERED the finite past,for the evident reason that they cannot have radiated light and heat through infinite time and still be highly heated. The present energy of the heavenly bodies has been stored in them within a finite past, and must be dissipated within a finite future. The present condition of the universe is temporal. There must, therefore, be a power unseen and eternal, unconditioned, that has established the visible universe in its present condition. The uni- verse as it now is cannot be explained according to known physical laws. We must assume something more than matter and ether in motion—we must at least predicate a cause of motion. IV. METHOD OF CREATION. THERE exist on the earth at present from a million to a million and a half species of animals and vege- tables,* and it is commonly believed that the number of extinct forms is many times greater than the liv- ing. These organic beings are divided into kingdoms, sub-kingdoms, classes, orders, genera, species and varieties. It is taught by evolution, that beginning with proto- plasm, derived by spontaneous generation from in- organic matter, the process of evolution, acting through secondary agencies alone, has, from this primordial protoplasm by ordinary generation and by processes strictly natural, but in no case supernatural, derived the countless multitude of animal and vege- table species that have appeared upon the earth. The primordial protoplasm was the parent from which all organic beings have descended. Spontaneous generation being strictly a natural process, a process so rare, according to some authors, that we need not expect it to be repeated, the exist- ence of all organic species, including man, was sus- pended on the production of life by strictly natural processes which are still in operation, but which are persistently refusing to produce a similar result. If there is an intelligent Creator, it would seem that he carried rashness to the verge of destruction when *The Interpretation of Nature, by N. S. Shaler, p 149. 4 49 SET IR, 50 ORGANIC EVOLUTION CONSIDERED he suspended the possible existence of life upon sec- ondary agencies which have acted for at least a hun- dred million years* upon the earth, but which in all that time have been able to produce and propagate the primordial protoplasm only once. It was indeed fortunate that the one and only possible card of for- tune in the lottery of infinite impossibilities was drawn so early in the geological history of the earth, so that there would be an abundance of time while the sun retained its light and heat to evolve the count- less species of living beings, the highest of which culminated in man. It is a significant fact in the existence of living beings that they appeared so early in the history of the earth. From the dead, unconscious matter that we tread beneath our feet, we may, according to the theory of evolution, ascend by secondary agencies alone, by vir- tue of ‘‘the laws impressed on matter by the Cre- ator,’’ as Darwin has expressed it, through spontan- eous generation, on and on, through an infinite num- ber of organic forms till we reach the mind of man, which is the pinnacle of evolution. I need not say that Darwin in ‘The Origin of Species,’’ has given to the world most of the facts’ and arguments that have been urged for and against the theory of organic evolution. Perhaps no other scientific book has ever done so much in so shorta time to turn human thought aside into a new channel. Before proceeding to consider the facts which bear upon the theory of the evolution of organic forms, I will present the possible Theistic theories according to which new organic forms may have been brought into existence. First, the Creator may have created each species by * The Interpretation of Nature, by N. S. Shaler, p, 122. METHOD OF CREATION 51 means of secondary agencies alone, by the process of evolution. Second, he may have created each species from in- organic matter by means of a special fiat. Third, he may have created certain types of living beings from inorganic matter by special fiats, and from these types he may-have evolved, by secondary agencies, all other forms. The existence of secondary causes implies a pri- mary cause. The unity in nature shows that the primary cause is one and not many. The method of creation is nothing except as it bears on our interpretation of the nature of the creative power. Theism stands in no danger from creation by secondary causes, for they are consistent with the existence of an intelligent Creator. Evolu- tion may be atheistic, but it is not necessarily so. Either of the above methods of creation may be Theistic. Evolution, if true, is only the immediate explana- tion, but the vital question is, What is the nature of the final Cause as indicated by the secondary causes? Evolution, in the belief of the Theistic evolution- ist, is due to secondary agencies working according to established law through all ages, under the guidance of the Divine Mind. The action of natural causes has been continuous, and it is believed by evolution- ists generally that they are sufficient to account for the present condition of things in the universe. On the other hand, it is evident that a failure in the sufficiency of secondary causes to produce a known result, renders it necessary that the Primary Cause should come to their aid. Each new form that is created involves to a certain extent a change in the method of creation. It may not demand new agencies, but it requires at least a 52 ORGANIC EVOLUTION CONSIDERED change in the method by which the agencies work. When we speak of secondary causes, we imply the existence of a Primary Cause from which they have sprung. If matter and the forces of nature are sec- ondary causes, then their existence is due to the Primary Cause, and their creation required special acts of that cause. Darwin speaks of ‘‘the laws im- pressed on matter by the Creator.”? The impression of these laws on matter must have required special fiats of the Creator. Spencer attributes all known phenomena to the Unknown and Unknowable Power. It seems to me that at least several fiats were neces- sary in creation, namely, the creation of matter, the creation of the forces of nature, the creation of the first living being, the creation of the senses, the crea- tion of instincts, and the creation of the mind of man. These are exceptional kinds of work, which demanded, I think, the exercise of exceptional kinds of power, or they demanded exceptional methods of the action of secondary agencies, which could be brought about only by the acts of the Primary Cause. ‘Itis conceivable that the Creator’s method may be similar to that of man in dealing with nature. Man accomplishes an endless number of purposes by mak- ing use of existing matter and forces. A special act of the Creator does not involve the abandonment of the use of secondary agencies, but it may be a special use of these agencies, so that they accomplish work which they would not otherwise per- form. The mind of man isa controlling agency in the affairs of the earth. Mind perpetually interferes with the workings of nature, directing her forces intc new channels, and thus producing results which are as wonderful as miracles. It is the prerogative of mind to rule over all else—to subdue, combine, direct and fulfill the endless purposes of intelligence. METHOD OF CREATION 53 The Creator has made the universe. Its laws are his laws. Its present condition is due to him. We may say that he created nature and left it to its own workings, or, on the other hand, that the workings of nature are due to his immediate presence and the per- petual exercise of his power. That the Creator would make the universe and then separate himself from it, as if he had no interest in it, seems to my mind wholly improbable. ‘In him we live and move and have our being,’ expresses, I be- lieve, a scientific truth. He is a universal presence and power in and through nature at all times. All power is his power, and all the workings of nature are due to him. “For of him, and through him, and unto him are all things.’? ‘‘For your Father knoweth what things ye have need of, before ye ask him.”’ ‘‘Are not two sparrows sold fora farthing? and not one of them shall fall on the ground without your Father; but the very hairs of your head are all numbered.”’ ‘¢ The glory of the Lord shall endure forever: the Lord shall rejoice in his works. He looketh on the earth and it trembleth: he toucheth the hills and they smoke.’’ ‘“‘The Lord reigneth; let the earth rejoice.’’ ‘‘ His lightnings enlightened the world: the earth saw, and trembled. The hills melted like wax at the presence of the Lord, at the presence of the Lord of the whole earth.’’ The Bible represents the Creator as a present, liv- ing, intelligent God, who is interested in his works, and who is ever working in and through nature. The forces of nature are the power of God, and the results produced by these forces are due to his will. We are not to look on the Universe as a complex 54 ORGANIC EVOLUTION CONSIDERED machine which the Creator has made and set to work, and from which he has withdrawn himself and which he views as a spectator, but we are to regard its oper- ations as being due to his omnipresence and to the perpetual exercise of his power, and believe that all things are done with absolute wisdom. Whatever may be our theory as to the nature of the first Cause, we must believe that the Universe, as it exists, is the best possible. If the Creator is destitute of intelligence, then it is evident that the Universe, as it is, was the only thing possible. If, on the other hand, the Creator is a God of intelligence, wisdom, mercy and love, it is evident that in creating the Universe he manifested to the fullest possible extent the nature of his attributes. We have no reason to believe that nature might have been better, that it is imperfect, and that things are out of joint. It is impossible, from our limited view of things, that we should be able to show a lack of wisdom in the works of the Creator of an infinite Universe. Our capacities, and time, and opportunities for knowing are all extremely limited, and these things would suggest that we are not prepared to pronounce adverse judgments against the attributes of an infinite Intelligence working through eternity. The fact that the work of creation has advanced from inorganic matter to the mind of man, would of itself, in a general way, seem to indicate the wisdom and beneficence of the Creator. The vital question at issue with regard to the crea- tion of living beings is as to the nature of the Cre- ator. At bottom the question as to the method of creation is only a dispute between Theism and Atheism. If the existence of all things can be explained in terms of matter and force, then Atheism METHOD OF CREATION 55 triumphs. If the existence of a Supreme Spirit must be assumed in order to account for the present condi- tion of things, then Theism is established. Whether the Creator created living beings suddenly or slowly, whether he made them directly from inor- ganic matter or created some from others by the process of evolution, whether he created by fiat or by the use of secondary agencies, is of importance only as it helps us to understand the nature of the Creator himself. It is certain that the bodies of all animals and ° plants consist of a few simple kinds of ordinary mat- ter. It is certain that the plant gets its food from soil, water and air, and that its tissues are converted into the tissues of animals. The plant is not the less noble that its cells are made of inorganic matter, nor the animal the less elevated because its body is con- structed of the materials furnished by plants, nor is man less spiritual because he subsists on animals and plants and minerals. If the plant can grow into an animal, if the worm can be developed into a fish, the fish into a reptile, the reptile into a mammal, and the mammal into a man, then the fact of such origins does not degrade the higher forms into the lower, but it shows the greatness of the Power that has created them. _ But we would be blind, if, having concluded that the above was the method of creation, we should also affirm that soil, plant, worm, fish, reptile, mammal and man are essentially alike. The attempt to prove this is a mistake which has been made by some evolutionists. It is this effort especially that the Theist resists, for he regards it as Atheism. He denies that man is only matter and force. He denies that all the members of the series, although constructed of the same material 56 ORGANIC EVOLUTION CONSIDERED elements, are essentially alike. He denies that man can be explained in terms of the mammal, and so on back till all are explained in terms of a common soil and sunshine. He believes that as we ascend the scale, whether by evolution or otherwise, something more than dyna- mics must be appealed to in order to account for the marvelous progress. If we knew that man was made directly from inor- ganic matter, then there could be no question as to the existence of an intelligent Creator. The miracle is evidence of supernatural power. A miracle producing a small change is as strong proof as one producing a great change, but in the former case there is more room to question the fact as to its being a miracle. For example, the creation of a single living cell—an amoeba—directly from in- organic matter might possibly be regarded as a case of spontaneous generation, while the creation of a man in a similar way would be an undoubted miracle. On account of the doubts thus arising as to the cause of small changes, which constitute the method of evolution, the Theist is slow to accept this as a sub- stitute for the older belief. My own conviction is that, whatever the method, it is Divine. Equal results require equal causes, whether produced sud- denly or prolonged through the ages. V. SPONTANEOUS GENERATION. Tuat living beings have had a beginning on the earth all scientists admit. As to when they began it would be useless to inquire, but it was, without doubt, at a time vastly remote. The authentic geological record of plants and animals extends backward, perhaps, fifty million years, and it cannot be claimed that the oldest known. fossils represent the first organisms that were created. We do not know from the geological record whether the plant and the animal appeared simultan- eously, or whether the plant preceded the animal. It is believed by some geologists that the oldest known fossil is the Eozoon canadense, and that this is the skeleton of a very low, but not of the lowest, form of animal life. The weight of opinion of the latest authorities is, I think, that Eozoon is not a fossil. If it represents an animal it is evident that plants must have existed, as food, at the same time, for it is well known that no animal can live exclusive- ly on inorganic food. The presence of graphite in the rocks in which Eozoon is found can be explained by supposing that it was obtained from organic matter. I make these remarks to show that we cannot look to the geological record to reveal the beginning of life. The only known method of producing a plant or animal is by means of one or more parent organisms. 57 58 ORGANIC EVOLUTION CONSIDERED As long as there is no necessary break in this method it must be exclusively accepted. But the break in the chain of ordinary method when we come to the first: living organism is abrupt— it isa great gulf reaching from the dead to the liv- ing. There is no greater chasm in nature than that between dead matter and a living being, unless it is that between mind on the one hand and matter and force on the other. It is a gulf which science cannot bridge. We have not even the aid of analogy when we try to explain the origin of the first living being. The parents, accord- ing to the theory of abiogenesis, are inorganic matter and the forces of nature, and these are not analogous to a living parent. Some evolutionists speak lightly of the ‘ special- act’? theory of creation. The beginning of life on the earth involved a special act of some kind. Whether the Creator worked directly or indirectly, the act of creation was no less special. If the first living being was brought into existence by the Crea- tor through the exercise of secondary agencies, it re- quired a special directing of these agencies to produce the result, and this is all that the Theist needs to mean by the word miracle. We are driven to assume a special act of the Creator by the break in the method of producing new organic beings by ordinary generation, and by the failure of the theory of spon- taneous generation. I will now proceed to briefly examine this theory. Let us get clearly before us the nature of the prob- lem to be solved. Every living being, whether plant or animal, must have as constituent parts of its body at least four elements, namely, carbon, hydrogen, oxygen and nitrogen. These four elements, either free or in combination, or both, exist abundantly in SPONTANEOUS GENERATION 59 all parts of the earth. The forms of plant food which the plant commonly uses, are carbon dioxide, represented by the formula C O2; water, the formula of which is He O, and ammonia, with the formula. N Hs, and a nitrate, with the formula K N Qs. The plant obtains its carbon from carbon dioxide, which it takes from the air; its hydrogen and oxygen mostly from water, which it obtains from the soil, and its nitrogen from some compound of ammonia or some nitrate, both of which it gets in solution in water from the soil. It will be noticed that the formulas of these plant foods are simple; that is, the molecule of each kind has but few atoms, as shown by the formula. The plant alone, and not the animal, has the power to take these comparatively simple inorganic compounds and, by the aid of heat, light and the other usual physical conditions, convert them into the exceedingly com- plex tissues that compose its body. The most essen- tial of these tissues, the one that is necessarily pres- ent inevery organic being, is protoplasm. This is the substance in which life manifests itself especially. It is composed of the four elements named above, and it is exceedingly complex in its structure, each mole- cule of protoplasm containing hundreds of atoms. One of the formulas given for protoplasm is Cr Hin Nis S Ow. In order to prove that spontaneous generation has taken place, it would be necessary to show that a living being, composed of the exceedingly complex substance, protoplasm, capable of propagating its kind by the ordinary method of generation, can be produced from the above four elements and their compounds, by the action of the forces of nature. It will be noticed that this is not simply a question of chemical composition, but also of life and of ability 60 ORGANIC EVOLUTION CONSIDERED to propagate its kind. Dead protoplasm may have the same chemical composition that living protoplasm has, andeven living protoplasm may be wholly unable to produce other protoplasm. Did nature in her laboratory, through the second- ary agencies of matter and force alone, create the first living organism, with the wonderful power of propagating its kind? If she has done this we are absolutely ignorant of the fact. There is no case of analogy from which we can conclude that she thus creates living beings from dead matter. Besides this, the facts, so far as known, point in the other direction. It should be remembered that spontaneous generation is a neces- sary part of the theory of evolution as held by most evolutionists. If natural forces acting on matter in the usual way ever created living beings, I know of no reason why this process should not have continued through all time since the first living being appeared. It is not commonly claimed that spontaneous generation is taking place at present. A few years ago the scien- tific world was much agitated over the subject. Dr. Bastion thought that, beyond doubt, he had shown that spontaneous generation takes place from organic infusions. Then followed Tyndall with almost a thousand experiments, in which he proved to the satisfaction of the scientific world that spontaneous generation does not take place from organic in- fusions; that, so far as experiments show anything, it is that a living organism must have had a parent organism. It will be noticed that in these experiments he and others used water which already contained organic matter. The protoplasm necessary to form the body of the new living organism was ready made and at SPONTANEOUS GENERATION 61 hand. If living beings could not come into existence from this highly organized matter, which can serve as animal food and of which their bodies are made, what hope can there be that they can originate from very simple forms of inorganic matter? If spontaneous generation has taken place, it is still a legitimate problem for the laboratory to solve. If it has taken place in nature, then I can see no reason why it may not be repeated time after time. It is admitted by some scientists that it is not now taking place, and it is assumed by them that it is an occurrence so extraordinary that we ought not to ex- pect it to be repeated. But why extraordinary? Spontaneous generation, as believed in by most evolu- tionists, is simply a matter of chemistry, and certain- ly no chemical action can be regarded as being so extraordinary that it may not be repeated. We have good reason to believe that life began millions of years ago under physical conditions that substantially exist in many parts of the world to-day, and that have existed from the first dawn of life. The earth is one vast laboratory in which every moment are taking place countless millions of experi- ments. The materials for the construction of organic beings are everywhere present, and the same forces are ceaselessly doing their work, as they have been from the first. To conclude that under the numerous and widespread conditions favorable to the existence of life, which have so Jong existed and which still exist in the earth, spontaneous generation, a chemical problem, could have been produced but once, or only a few times, is beyond belief. In view of the presence of such conditions, extend- ing through the many millions of years since life began, nature ought to have successfully repeated the experiment resulting in spontaneous generation a 62 ORGANIC EVOLUTION CONSIDERED great many times. And yet all the known evidence is against the belief that nature can create a living organism from dead matter. If, therefore, we cannot look to spontaneous gen- eration, which represents only secondary causes, we must look beyond to the First Cause as the Creator of life. Iam aware that there are those who question the legitimacy of this conclusion. There are those who claim that matter and the forces of nature are the only cause, and they, of course, must believe that spontaneous generation has taken place. The functions performed by the living organism, however simple it may be, are so different from any thing in the inorganic world that @ priort we would not expect the former to spring from the latter by spontaneous generation. The functions of the organ- ism, including the prehension, digestion, circulation, and assimilation of food, the reproduction of other organisms like itself, and then decay and death, followed by the return of the body to comparatively simple inorganic forms of matter, constitute a cycle of changes for which we find no analogy in the inor- ganic world. It is true that the chemist has manufactured cer- tain organic compounds from their inorganic ele- ments, but in no case has he been able to produce from inorganic matter an organic compound that is an essential part of the tissues of a living being, and, least of all, has he been able to manufacture pro- toplasm, which is the absolutely essential substance in every living thing. And even if he could build up protoplasm by starting with the elements, a thing which is beyond all hope, still the manufactured protoplasm would be destitute of life, and the ques- tion as to the origin of life would remain unanswered. SPONTANEOUS GENERATION 63 Dead protoplasm can neither grow nor propagate. Every living organism has an individuality and struc- ture, and it performs functions which are beyond the power of the chemist to produce. Nor is there any physical science which can throw light upon this subject. Chemistry, Anatomy, Phys- iology, Biology and all the microscopes serve only mechanical purposes—they cannot reveal the origin of life. We will wait in vain for science to speak with authority in this matter. The known facts of science are, I believe, opposed to the theory of spon- taneous generation. It is evident that with this state of facts there can be no conflict between science and religion with re- gard to the origin of life. Science admits that she knows nothing on the subject, but at the same time many evolutionists deem it necessary to defend the theory of abiogenesis as being necessary to complete that of evolution. Mr. Darwin says, ‘‘ There is grandeur in this view of life, with its several powers, having been original- ly breathed by the Creator into a few forms or into one.”’ The creation of the first living being was an ex- ceptional kind of work which required the exercise of an exceptional kind of power. If, as Mr. Darwin says, life was breathed by the Creator into the first forms, this constitutes a break in the sufficiency of natural causes alone to produce life. If a special fiat was necessary at this point, why may it not have been at others? The insufficiency of natural causes makes it neces- sary to assume the exercise of some power that can control nature, and thus produce results that would not otherwise have been produced. The creation of a 64 ORGANIC EVOLUTION CONSIDERED living being from inorganic matter by the Creator was, so far as I can see, no more an interference with the processes of nature than is my voluntary act in writing these words. In each case the result is due to a power that does not exist in the inanimate world. VI. NATURAL SELECTION. Tue theory of ‘‘ Natural Selection ’’ has been most elaborately argued pro and con, by Mr. Darwin, in ‘* The Origin of Species,’’ and on this theory he, for the most part, relies to explain the evolution of organic forms. The general facts concerning it are the following: The earth can produce but a limited supply of food for living beings. Every species of plants and of animals multiplies its kind in a geometrical ratio, so that if all the young of any species of organism could live to the average age of those of its kind that arrive at the age of maturity, the earth would in a few gen- erations be filled by the individuals of that species. As a matter of fact this is not the case, for the earth is occupied by hundreds of thousands of organic forms. ; The whole possible number of organisms that can live on the earth at one time, is limited by the pos- sible quantity of food at their disposal. Taking the birth-rate of organisms and the quantity of food at their disposal, it is evident that most of them must perish before arriving at the age of maturity, for lack of food, if for no other reason. In many cases the number of animals living is much less than the food will support, there being frequent- ly a superabundance of food that goes to waste. It is, therefore, evident that nature has some means ~ 65 66 ORGANIC EVOLUTION CONSIDERED of destroying most organic beings that are produced before they arrive at the age of maturity. The supply of food being insufficient to support all of the organic beings that are produced, a struggle ta obtain that food is perpetually going on, in which the great majority, being necessarily unsuccessful, perish. Everywhere in the organic world is perpetual compe- tition, warfare, a ‘‘ struggle for existence,”’ in which, other things being equal, the weaker perish. A second fact in the theory of natural selection is that the offspring closely resemble the parents. A third fact is that the offspring are never exactly like the parents. The variation from the parent form may be in shape, size, color, and, in fact, in an endless number of respects. It is claimed by Darwin that the variation at any one time is, as a rule, extremely small; so small, in fact, that it would not be noticeable. Again, it is claimed that if any variation is useful to the individual possessing it, if it enables it the bet- ter to compete with its kind and with other organisms for food, or if it gives it an advantage in escaping from its enemies, or an advantage in any other respect over others of its species, then it will survive, while those less favored will perish. It is further claimed that the useful variation will be propagated, so that the offspring of the individual which possesses the favorable variation will stand a better chance of surviving than those that have not favorably varied. In this way, therefore, Nature is continually selecting the forms that are best able to compete with other organisms for existence. To ex- press this process Mr. Darwin has used the expression ** Natural Selection,’’ and Herbert Spencer the ex- pression ‘‘ Survival of the Fittest.’ It is further claimed by Darwin, and by evolution- NATURAL SELECTION 67 ists generally, that, given a sufficient length of time and slowly varying conditions, such as exist upon the earth, there is no practical limit to the amount of variation of organic forms that may slowly take place, and that natural selection is, for the most part, suffi- cient to account for the preservation of favorable variations, thus accumulating them in certain direc- tions. It is not, however, commonly held that natural selection alone will account for the evolution of all organic forms. Darwin says that ‘Natural selection acts solely through the preservation of variations in some way advantageous, which consequently endure.” Again he says, ‘‘ It may metaphorically be said that natural selection is daily and hourly scrutinizing, throughout the world, the slightest variations; rejecting those that are bad, preserving and adding up all that are good; silently and insensibly working, whenever and wherever opportunity offers, at the improvement of each organic being in relation to its organic and in- organic conditions of life. We see nothing of these slow changes in process, until the hand of time has marked the lapse of ages, and then so imperfect is our view into long-past geological ages, that we see only that the forms of life are now different from what they formerly were.’’ Again he says, “I believe that animals are de- scended from at most only four or five progenitors, and plants from an equal or lesser number. «‘ Analogy would lead me one step further, namely, to the belief that all animals and plants are descended from some one prototype. But analogy may be a deceitful guide.” In these quotations are clearly set forth the general claims of the theory of natural selection. It is true that in the organic world there exist the 68 ORGANIC EVOLUTION CONSIDERED two tendencies above named, the tendency of the off- spring to closely resemble the parent, and the tend- ency to vary somewhat from the parent. The essence of the theory of organic evolution is involved in the relative strength of these tendencies. They may be compared to the centripetal and the centrif- agul forces. Is there an orbit of variation for each species be- yond which the tendency to variation cannot carry the form? Is the tendency to resemble the parent a centripetal force that can forever hold the amount of variation within a definite orbit? or, on the other hand, does the centrifugal force carry the new forms off in tangents so that there is no return to the ancestral form? It is evident that if the theory of natural selection is true, it is not a complete theory of organic evolu- tion. It accounts only for preserving certain forms instead of others. Darwin says, ‘‘ Natural selection acts solely through the preservation of variations in some way advantageous, which consequently endure.”’ Again, he says, ‘‘I have called this principle by which each slight variation, if useful, is preserved, by the term Natural Selection, in order to mark its rela- tion to man’s power of selection.” Natural Selection attempts, therefore, to account for the preservation of certain variations, and not for their production. As to the causes and the amount of variation, no satisfactory theory has been given. Darwin, after assigning various reasons why he thinks variations may take place, says, ‘‘ Our ignorance of the laws of variation is profound. Not in one case out of a hundred can we pretend to assign any reason why this or that part has varied.’”’ And so it happens that we are left in almost total darkness as to the cause of the most important factor in organic evolu- NATURAL SELECTION 69 tion. A complete theory of evolution by secondary agencies alone demands an explanation of the causes of variation. It may be that the causes of variation are purely secondary, or it may be that variations are produced by secondary agencies under the direct control of the Creator, or they may be produced by special fiats. It is evident that with these alternatives the evolu- tionist has no right to urge the theory of secondary causes alone, and this is especially true if, by second- ary causes, is meant causes that may work independ- ently of the direct control of the Creator, for the use of the expression, secondary causes, implies the ex- istence of a Primary Cause, and known facts do not justify us in assuming that any part of the Universe can run itself if severed from the Primary Cause. That every event must have an efficient cause there can be no doubt, but there may be grave doubts as to whether a cause is to be regarded as secondary or primary. ‘The following closing paragraph of ‘‘ The Origin of Species’ contains a general summary of Darwin’s theory. ‘*It is interesting to comtemplate a tangled bank, clothed with many plants of many kinds, with birds singing on the bushes, with various insects flit- ting about, and with worms crawling through the damp earth, and to reflect that these elaborately con- structed forms, so different from each, and depend- ent on each other in so complex a manner, have all been produced by laws acting around us. These laws, taken in the largest sense, being Growth with Reproduction; Inheritance, which is almost implied by reproduction; Variability from the indirect and direct action of the conditions of life, and from use and disuse; a Ratio of Increase so high as to lead to a struggle for life, and as a consequence to Natural 70 ORGANIC EVOLUTION CONSIDERED Selection, entailing Divergence of Character and the Extinction of less improved forms. Thus from the war of Nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows. There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms, or into one; and that, while this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning, end- less forms, most beautiful and most wonderful, have been, and are being, evolved.”’ From this passage it is seen that Darwin did not accept the theory of spontaneous generation. He speaks of ‘life with its several powers, having been originally breathed by the Creator into a few forms, or into one.”’ This first form was the egg from which all subsequent organic beings have been hatched by incubation through the long ages. This primordial protoplasm, which, according to most evolutionists, was produced by spontaneous generation, was, it seems to me, endowed with miraculous power, as shown by its ability to vary without limitation in countless directions, to produce the most complex physical results and all the varied and wonderful phenomena. of life, together with the human mind with all of its marvelous powers. If the Creator could breathe life into ‘‘ a few forms or into one,’’ as Darwin thinks he did, without vio- lating the law of his own being, and in accordance with the laws which he has established, it seems evident that he might at other times breathe life into other forms in accordance with his laws. I see no necessity for a logic that would compel the Creator to confine the number of his creative fiats to a few, or to one, nor which would limit the fiats to one time. NATURAL SELECTION 71 With most evolutionists the backbone of their theory is the assumption that secondary agencies alone have produced all organic forms. Darwin says, ‘“‘To my mind it accords better with what we know of the laws impressed on matter by the Creator, that the production and extinction of the past and present inhabitants of the world should have been due to secondary causes, like those determining the birth and the death of the individual.’? The ‘*secondary causes,’’ as I understand him, are ‘the laws impressed on matter.’’ If this is true, then it would seem that the Creator might have retired after creating matter, or, at most, after creating the first organism, and have let the work go on without his further special care. Again, Darwin says that the facts, so far as he can judge, do not ‘‘ afford any evidence of the existence of an innate tendency toward perfectibility or pro- gressive development.” * Again, he says, ‘‘I believe in no law of necessary development.”’ As for myself, I believe that mind was the goal of creation which the Creator had in view. No other theory gives a sufficient explanation of creation. Without mind as the crowning work I would say that creation would have been a failure. Does Mr. Darwin accept the theory that mind was the intended goal of creation? And, if so, would he say that the ‘‘secondary causes,’”’ ‘‘the laws im- pressed on matter by the Creator,’’ had the necessary tendency, beyond the possibility of failure, to evolve man endowed with mind? Ithink that he does not accept this view. If the theory of evolution is true, the unbroken chain of organic beings reaching from man back to the first living being, extends, I presume, over at least * Origin of Species, p. 102, 5th Ed. 72 ORGANIC EVOLUTION CONSIDERED a hundred million years. If we imagine the primor- dial protoplasm to have been turned over to the man- agement of purely secondary causes, to the ‘laws impressed on matter,’ to run the amuck of adverse circumstances during all that time, without the direct supervision of the Creator, it seems to me that there were millions of chances to one that this direct chain would have been broken, and thus have destroyed the possibility of the evolution of man. It was possible, according to the theory, for man to be evolved in one line only, and that line was com- posed of an infinite number of forms in succession, the extinction of any one of which, without leaving progeny, would have prevented the evolution of man. That blind chance, without the intervention of an Intelligent Creator, could have preserved the infinite ancestral line, does not seem probable. This evolution, according to Mr. Darwin, by virtue of ‘‘the laws impressed on matter by the Creator,”’ proceeded upward from protoplasm to man, in spite of the fact that there does not seem to be ‘any evi- dence of the existence of an innate tendency toward perfectibility or progressive development.’’ The evolution of man assumes the preservation in every instance of the most highly developed forms in each of the countless generations that compose the chain of evolution, unless it may be assumed that ultimate forms higher than man might have been evolved from beings that have perished. Natural selection does not, however, necessarily preserve the most highly developed forms. It only preserves those forms that are best adapted to com- pete in the struggle for existence under the given cir- cumstances. The fact of a more highly organized body, or even of greater intelligence, does not neces- sarily insure preservation. NATURAL SELECTION 73 The forms that have been most successful in the struggle for existence through the long geological ages, such as the lingula and certain protozoa, are simple in their structure, while the most complex beings, and those in which the brain is most highly developed, suchas the highest species of vertebrates, have had but a brief existence. There is nothing in the laws of nature to insure beyond doubt, at all times, the preservation of the higher forms instead of the lower, for the latter may be better adapted to compete for existence under the particular circum- stances. ‘* Survival of the fittest’’ does not necessarily mean survival of the highest. This is shown to be true by the very recent disappearance of man’s im- mediate ancestors, if he was produced by evolution. Between man and the anthropomorphous apes, which are regarded as being substantially like the re- mote ancestors of man, there existed the immediate progenitors of man, all of which have perished; yet they must have been vastly more intelligent than the apes which have survived. Without dwelling further upon this, I will say that the fact that man was created, either by a fiat or by evolution, can only be explained by assuming the ex- istence of an Intelligent Creator. The theory of evolution would imply a no less wonderful Intelligence than that of fiat, involving as it does long ages and au infinite number of vicissi- tudes and varying circumstances. Mr. Darwin seems to imply an Intelligent Creator when he says: ‘* The birth of the species and of the individual are equally parts of that grand sequence of events which our minds refuse to accept as the result of blind chance.’’* * Descent of Man, Vol. 2, p. 378. 74 ORGANIC EVOLUTION CONSIDERED The figure of a tree has been a favorite one by which to represent the evolution of organic forms. Beginning with primordial protoplasm as a seed, we follow its growth. The main trunk of the tree, repre- senting the direct line of man’s ascent, is made up of the countless forms that have intervened between man and the first organism, the different races of men being represented by an equal number of small twigs at the top. As the primordial form multiplied, it branched by favorable variations, the new forms thus produced constituting branches of the tree of evolution. Long before the authentic geological record began, the tree of life divided into two great divisions,—that of animals and that of plants, and when the authentic record began we find animals, widely different in structure, representing all the sub- kingdoms and most of the classes of invertebrates. And so the tree continued to grow and branch through the ages, the individual twigs representing species and varieties. If this tree were planted in the earth so that the part under the earth would represent extinct forms, and the part above the ground represent living forms, it is evident that most of the tree would be buried, for the reason that the living species are few com- pared to the extinct. It is also evident that the branches and twigs above ground, that represent liv- ing forms, would, for the most part, stand isolated, and that, to find their points of union, we must look beneath the surface among extinct forms. If we knew the entire record of life we could begin with any species and trace it back, without a break, to the primordial form. Having stated the general outline of the theory of natural selection, I will present some of the argu- NATURAL SELECTION 15 ments which have been offered for and against the theory. Darwin gives special attention to the subject of variation under domestication. It is well known that new varieties of plants and animals are produced under domestication, and that they are separated and preserved as distinct varieties by the agency of man. He dwells at length on the many varieties of domes- tic pigeons, and attempts to show that their common ancestor was the rock pigeon. These varieties, he claims, are as different in structure from each other as are all well-marked species. The varieties of pigeons all cross readily with each other, producing fertile offspring, and there is a fre- quent tendency in these crosses to revert to the form of the original stock. This is the clearest case that he presents among the domestic animals of the recent origin of well-marked varieties. He claims that these varieties are incipient species, and that species are only well marked varieties. If we grant that varieties can be produced, where can we set the limits of variability? He concludes that we cannot set a limit, and that, consequently, by the law of natural selection princi- pally, all organic forms have been evolved from a sim- ple form. With regard to the fertility of hybrids he says, “Now it is difficult, perhaps impossible, to bring for- ward one case of the hybrid offspring of two animals clearly distinct being themselves perfectly fertile.” It is well known that as a rule distinct species will not cross, and that if they do cross the offspring are not fertile. On the other hand, it is true that all varieties of a species readily cross, producing fertile offspring. 76 ORGANIC EVOLUTION CONSIDERED This has commonly been regarded as a well-defined distinction between varieties and species. If the varieties of pigeons which are so different from each other did not freely cross, and if the mon- srel offspring were not fertile, his argument as to the production of new species under domestication would be complete. The fact is, we do not know of the origin of any two species of animals that do not cross and whose off- spring are not fertile; in other words, we do not know of the origin of species, but only of varieties. The origin of species that will not cross and produce fertile offspring is assumed from the origin of varie- ties that do cross and produce fertile offspring. This leaves the evolutionist to account for one of the most difficult things in connection with his theory, namely, how did varieties of animals of the same species become cross-sterile? Let us consider this difficulty. It is claimed by evolutionists that varieties are incipient species; that closely related existing species were once only varieties of the same species. These closely related species which, it is claimed, have had a common origin, now often live side by side, occupy- ing the same or contiguous territories. It is a well known fact that by crossing varieties the offspring are rendered more vigorous and fertile, while by crossing species the offspring are either sterile or become so in a few generations and die out. How can varieties that are perfectly cross-fertile become species that are cross-sterile? Suppose that a species A, in a state of nature, pro- duces a variety B, the known facts lead us to believe that A and B would cross with each other, and that B would be lost as a variety. It is admitted by evolu- tionists that if the closely related varieties of domes- NATURAL SELECTION 17 tic animals were permitted to freely mingle, in a state of nature, they would, in a few generations, produce acommon form. There is nothing like the agency of man, in nature, to prevent varieties from mingling. The only method by which A and B could remain separated while located side by side, would be for them to be rendered cross-sterile in some way. If B were born cross-fertile with A, there is no conceivable method probable, by which, if the reproductive organs of both are perfect, which is necessarily implied in this case, they could ever become cross-sterile. This leads to the most important question, whether B may, by birth, be cross-sterile with its parent A, while the individuals composing B are fertile with each other and also those of A with each other. It is admitted by evolutionists that cross-sterility between A and B cannot be accounted for by the the- ory of natural selection, for it could be of no conceiv- able advantage. Dr. Romanes cuts the Gordian knot by assuming that B is, by birth, cross-sterile with A, and at the same time he assumes, and must assume, that the sexual organs of both A and B are perfect, so that each can propagate its kind. According to this assumption there must be pro- duced in the same locality, and at the same time, enough individuals of B, cross-sterile with A but fer- tile with each other, to propagate B, and, besides, there must be some favorable variation of these indi- viduals that will enable them to survive. Besides this, cross-sterility of A with B must be repeated every time a new species B originates, in order to isolate it from the parent form, which, con. sidering the hundreds of thousands of known species of living organisms, together with the common as- sumption that all known forms, both living and fossil, 78 ORGANIC EVOLUTION CONSIDERED as Darwin claims, are as nothing compared to the number of unknown extinct species, would make it necessary to repeat cross-sterility by birth between parent A and offspring B an infinite number of times. When we remember that the universal rule seems to be that parent and offspring are cross-fertile, and not cross-sterile, as the theory of evolution absolutely demands, there is no sufficient reason for making the extreme assumption of cross-sterility by birth. All known facts are against this extreme assumption. When we consider that no case of cross-sterility is known between A and B, when the sexual organs of both are perfect, and that the theory of evolution demands an infinite number of such cases, so that they could hardly be regarded as exceptions to the fact of cross-fertility, and when we remember that the infi- nite number of species of animals which have sur- vived to propagate their kind represent only a small fraction of those that were born cross-sterile with the parent form, because only those survived that were born not only cross-sterile, but also with some favor- able variation that would the better enable them to compete for existence—remembering these things, it would seem that the theory of evolution is pushed to the verge of despair in adopting the theory of cross- sterility by birth between parent and offspring. And yct this assumption, which has of late been urged by Dr. Romanes especially, and adopted by others, is regarded as the most plausible way out of the diffi- culty. The formation of permanent varieties in a state of nature is infinitely more difficult than under domesti- cation, because in the latter case man separates the forms that he wants to propagate, and keeps them apart from the parent stock, whereas, in the former NATURAL SELECTION 79 ease the variation is lost by mingling with the com- mon stock. Mr. Darwin says that very ‘rarely single varia- tions, whether slight or strongly marked, could be perpetuated.”’ He says: ‘If, for instance, a bird of some kind could procure its food more easily by having its beak curved, and if one were born with its beak strongly curved, and which consequently flourished, neverthe- less, there would be a very poor chance of this one individual perpetuating its kind to the exclusion of the common form; but there can hardly be a doubt, judging by what we see taking place under domestica- tion, that this result would follow from the preserva- tion during many generations of a large number of individuals with more or less curved beaks, and from the destruction of a still larger number with the straightest beaks.’’* Here he admits that even a favorable variation in a single individual is not at all likely to be propa- gated, but he attempts to bridge the difficulty by assuming that the same favorable variation may take place at the same time in a large number of individ- uals, so that the favorable variation, in spite of ming- ling with all other variations, can be propagated. I think that this assumption is destitute of the sup- port of facts. The fact is that variations take place in all conceivable directions, and, as Darwin repeat- edly urges, they are generally very slight. Varia- tions in one direction are, on an average, probably equal to those in another, and, consequently, when all the variations are mingled, as they are in a state of nature, the form of the species remains substan- tially constant. Besides, this theory, if true, would account for * Origin of Species, 5th Edition, p. 94. 80 ORGANIC EVOLUTION CONSIDERED only one species at a time in the same locality, for it assumes that the individuals with the favorable vari- ation survive at the expense of the parent form; nor does it account for cross-sterility between closely- related species. The later evolutionists, feeling the insufficiency of Darwin’s assumption, have bridged the difficulty by introducing a still greater one—that of cross-ster- ility by birth. Darwin says that he cannot agree ‘“‘that migration and isolation are necessary for the formation of new species.’’* Again: ‘‘Although isolation is of great importance in the production of new species, on the whole I am inclined to believe that largeness of area is still more important, especially for the production of species which shall prove capable of enduring for a long period and spreading widely.’’f Suppose, according to this, that we find two species that have been evolved from a common stock occupy- ing contiguous territories and mingling with each other on the common border. How can we account for the evolution of these two species in these locali- ties? It is evident that the difficulties that arise from the merging of new forms and of producing cross- sterility remain in full force. These difficulties are always present in a state of nature, whether the terri- tory is large or small, for the new species and its parent must occupy the same territory. The great difficulty in all cases is to isolate new forms from the parent form so that they will not be lost by mingling. Nature has no method, so far as facts show, of doing this. ain arwin says, isolation is of grea A , Darwin says, that ‘ isolat f t * Origin of Species, 5th Edition, p. 105. + Ibid, p. 106. NATURAL SELECTION 81 importance in the production of new species.’’* It is evident, however, that if a species be divided into two parts by barriers, this cannot decrease the difficulties already mentioned—this cannot prevent the merging of variations, nor produce cross-sterility between parent and offspring. The same difficulties that arise in forming a new species from a whole species, apply with equal force to the formation of a new species from a part of a species. The dividing of a species by barriers cannot therefore account for the formation of a new species. When we consider that many hundreds of thous- ands of species have existed, we cannot for a moment suppose that sufficient barriers could have isolated them, or even any considerable per cent of them, while being formed. Besides, closely related species occupy the same ter- ritory, which could not generally be the case if they had been isolated from each other by barriers while being formed, for if such barriers had existed they would have kept the species permanently isolated. Besides, if the supposed barriers were suflicient to isolate the parts of a species, they would be sufficient to prevent the species from separating into parts— for the barriers are, by supposition, impassable. Mr. Darwin, however, as already stated, denies that ‘* migration and isolation are necessary for the forma- tion of new species.”? When we consider the large numbers and relative positions of species, it seems necessary to assume that closely related species have generally been formed without being insolated by barriers. With regard to the difficulty of preserving varia- tions in nature, Le Conte says: ‘* But how can the process of progressive divergence begin, when slight 6 * Origin of Species, p. 106. 82 ORGANIC EVOLUTION CONSIDERED varieties are even more fertile by cross-breeding than by close breeding? Is it not evident that, with every generation, the slight varieties would cross-breed with one another and with the parent stock, and thus all varietal differences be funded into a common stock, and the type would be preserved unchanged? This, as already pointed out, has always been the chief dif- ficulty in the way of imagining how varieties can grow into species; andthe difficulty is only increased by our discussion of the law of cross-breeding. Now just here Dr. Romanes’s most important and prolific idea comes to our help, and, as it seems to us, com- pletely solves the difficulty.”’ * Thus, in the face of the fact that slight variations render animals more fertile by cross-breeding, it is assumed that new varieties are born cross-sterile with the parent form and cross-fertile with their own kind. I know of no assumption among scientific men that seems more extreme and unwarranted than this—none more in opposition to the facts at present known. Le Conte says further: ‘But suppose among these divergent variations there arise, from time to time, some which affect the reproductive or- gans in such wise that the variety, though perfectly fertile with its own kind, is infertile, or imperfectly fertile, with other varieties, and especially with the parent stock.’’} Here we find several things that must happen in a single generation. First, a number of individuals must be born and exist at the same time, which possess the same varia- tion. Second, this variation must, if it can be preserved, be of such a kind that it will give the individuals pos- * Evolution and Creation, p. 226. t Ibid, p. 227. NATURAL SELECTION 83 sessing it an advantage over the parent stock in the struggle for existence. Third, the individuals possessing the favorable vari- ation must be cross-sterile with the parent stock, otherwise the variation will be ‘‘ funded into a com- mon stock, and the type preserved unchanged.’ Fourth, the individuals with the favorable variation must be fertile with each other. Fifth, these individuals with the same favorable variation must find each other so that they can pro- pagate their kind, a thing that would hardly take place if they were few, as they probably would be, and were scattered over a wide territory. All of these things are assumed in face of the fact that variation increases instead of decreasing fertility. Besides, as already shown, it becomes necessary to assume that the remarkable fact of cross-sterility of parent and offspring has occurred an infinite number of times in order to produce all species. This idea must therefore be regarded as most ‘‘pro- lific’’ in order to meet the demands of the theory of evolution. It is assumed by Darwin and by evolutionists gener- ally, that the formation of a species takes places very slowly, by innumerable slight variations. If this view is accepted, together with that of Romanes, then cross-sterility between parent and offspring must be the overwhelming rule instead of the exception, in order to keep the very slight variations from being lost by mingling with the parent form. We know, ~however, that it is not the rule, nor is it even known, so far as 1 am informed, that there are exceptional cases among animals where a variety in nature is cross-sterile with the parent, but fertile with those of its own kind. 84 ORGANIC EVOLUTION CONSIDERED With regard to cross-sterility, Darwin says: ‘“‘After mature reflection it seems to me that this could not. have been effected through ‘natural selection, for it could have been of no direct advantage to an in- dividual animal to breed badly with another individ- ual of a different variety, and thus to leave few off- spring; consequently such individuals could not have been preserved or selected.’’* Again, he says: ‘‘That the sterility of first crosses, and indirectly of hybrids, is simply incidental on un- . known differences in the reproductive systems of the parent species.’’+ Mr. Spencer has written a series of articles entitled ‘©The Inadequacy of Natural Selection.’’ As to arti- ficial and natural selection he says: ‘* They are anal- ogous only within certain narrow limits, and in the great majority of cases, natural selection is utterly incapable of doing that which artificial selection does.’’t He quotes from Mr. Darwin: ‘ Any particular variation would soon be lost by crossing, reversion and the accidental destruction of the varying individ- uals, unless carefully preserved by man,’’§ Mr. Spencer claims that ‘‘the inheritance of ac- quired characters ’’ is a necessary supplement to nat- ural selection. Referring to his ‘‘ Principles of Biol- ogy,” he says: ‘‘It was contended that the relative powers of co-operative parts cannot be adjusted solely by survival of the fittest, and especially where the parts are numerous and the co-operation complex.”’ After arguing this proposition at length, he says: Close contemplation of the facts impresses me more strongly than ever with the two alternatives— * Origin of Species, p. 247. t Ibid, pp. 248-9. t¢ Popular Science Monthly for April, May and June, 1893. § Animals and Plants under Domestication, Vol. II., p. 292. NATURAL SELECTION 85 either there has been inheritance of acquired charac- ters, or there has been no evolution.’’ Also, ‘‘ For the inheritance of acquired characters, which it is now the fashion of the biological world to deny, was by Mr. Darwin fully recognized and often insisted on.’’ . . . ‘The neo-Darwinists, how- ever, do not admit this cause at all.’’ In concluding he says: ‘‘ See then how the cause stands. Natural selection, or survival of the fittest, is almost exclusively operative throughout the vegetable world, and throughout the lower animal world, characterized by relative passivity. But with the ascent to higher types of animals, its effects are in increasing degrees involved with those produced by inheritance of acquired characters, until, in ani- mals of complex structures, inheritance of acquired characters becomes an important, if not the chief, cause of evolution.’’ He admits that known facts which show that ac- quired characters are inherited are few, but he thinks that they are ‘‘as large a number as can be expected, considering the difficulty of observing them and the absence of search.”’ From the above, we see that the biological world is against Mr. Spencer’s view; that he would abandon the theory of evolution unless acquired characters had . been inherited, but that facts in support of this theory are meager. I think that his argument shows the insufficiency of the theory of natural selection, but the truth of his own theory remains to be established. We shall see further on that natural selection has been supple- mented by the theories of sexual selection and of the correlation of growth If Mr. Spencer’s theory as to the inheritance of acquired characters is true, still I do not see how 86 ORGANIC EVOLUTION CONSIDERED this can result in the formation of new species in a state of nature. Whatever might be the acquired characters of individuals, they would be lost by min- gling, and the difficulties which I have presented of evolving new species remain in full force. Biologists in the above instance, as well as in oth- ers, differ in theory as to fundamental principles of evolution. He who imagines that the theory of organic evolu- tion has been proved to the point of demonstration, has but to read the contentions of evolutionists them- selves with regard to the most important things in- volved in the theory, in order to satisfy his mind that there is great diversity of opinion. GEOLOGICAL AGES AND PERIODS. To be read upward by beginning at Archean on this page and ending at Recent on next page. Classes and Orders of Animals survive by the dying out of old and the introduction of new Species, is * | First known Reptiles. 5S lug Trilobites disappear. §# |° 2 PERMIAN. Orthocerous Cephalopods nearly extinct. BR |o3s Fishes with vertebrated tails almost extinct. 3 ia Cephalopods of many kinds, co. laa First Amphibians:—Labyrinthodonts. »4 |S O/CARBONIF- |Fishes were all Sharks and Ganoids. & {OO} ERousor |Lepidodendrids, Sigillarids, Calamites, Ferns and 8 ley Coal - MEAS- onifers abound. ge lao URES. Spiders, Myriapods, Scorpions. D 19 oy Numerous Insects: —May-flies, Locusts, Cockroaches, joa Saad (Some of the insects were gigantic in 3 size. = O |Supcarzon- |First land Snails. 3 IFEROUS. j|Crinoids culminated. Sea-urchins. M8 Ferns, Lycopods, Sigillarids, Calamites and Conifers. 2-| a |CATSEILL. |Eurypterids of large size. gg os Limnoids; Shrimps. 2 Blea CHEMUNG. |Orthopterous and Neuropterous Insects. 28) (e Myriapods. a Sou Large number of Corals. 2\3°\HAMILTON. |Fishes:—Placoderms, Dipnoans, Ganoids, Chimeroids, Sais 2 | CORNIFER- Sharks. s |5