SIR WILLIAM RAMSAY, K.C.B., F.R.S. MACMILLAN AND CO., LIMITED LONDON • BOMBAY • CALCUTTA ' MADRAS MELBOURNE THE MACMILLAN COMPANY NEW YORK • BOSTON • CHICAGO DALLAS • SAN FRANCISCO THE MACMILLAN CO. OF CANADA, LTD. TORONTO R WILLIAM RAMSAY K.C.B., F.R.S. MEMORIALS OF HIS LIFE AND WORK BY SIR WILLIAM A. TILDEN, F.R.S. VIVIT POST FUNERA VIRTUS MACMILLAN AND CO., LIMITED ST. MARTIN'S STREET, LONDON 1918 COPYRIGHT ::.: SrVI-l : . . :.- '. . --• • •-• ^ » • GLASGOW : PRINTED AT THE UNIVERSITY PRESS BT ROBERT MACLEHO8E AND CO. LTD. PKEFACE EVERY reader of this volume will at once perceive that its compilation would have been impossible but for the active co-operation of many friends. Foremost among them was, of course, Lady Ramsay, who has not only placed at the disposal of the writer the immense collec- tion of letters preserved by herself and by members of the family on both sides, but she has contributed many facts and incidents, and with her own pen has set down her recollections of the journeys taken with her husband to the West and to the East. The source of quotations inserted in the text has been indicated in each case, but the writer is under special obligations for the use of correspondence and for in- teresting recollections of early days in Ramsay's life to Mr. H. B. Fyfe, of Glasgow, his life-long friend and legal adviser, and to Sir James Bobbie, his early pupil and associate in chemical research, also to Professor Sydney Young, Ramsay's assistant at Bristol and colleague in research during a period of some seven years, while Professor Hicks, of Sheffield, has kindly supplied much information relative to the progress of the movement vi PREFACE which ultimately resulted in obtaining pecuniary assist- ance for university colleges from the Government. To Lord Rayleigh the writer desires to express his best thanks, for kindly consenting to read the MS. of that part of Chapter V. which relates to the discovery of argon, and for notes thereon, which have been embodied in the text. Mr. W. G. Ramsay has taken the trouble to compile the chronological list of honours conferred on his father, which will be found at the end of the book. The long series of letters addressed by William Ram- say to his cousin, Miss Ramsay, the eldest daughter of his uncle, the late Sir Andrew C. Ramsay, has afforded much insight into his character and the intimate rela- tions subsisting in the family. Among other friends who have supplied information, or have allowed the use of letters, are the following : Mr. James Rafter, the Registrar of the University of Bristol ; Professor E. C. C. Baly, F.R.S., of Liverpool University ; Professor J. Norman Collie, F.R.S., Pro- fessor F. G. Donnan, F.R.S., and Professor W. P. Ker, of University College, London ; the Provost of Univer- sity College (Sir T. Gregory Foster) ; Mr. Otto Hehner, Dr. George M'Gowan, Miss F. Mac Vicar, Mrs. M'Nicol, Mr. M. M. Pattison Muir ; Professor Alfred Marshall, of Cambridge ; Professor Lloyd Morgan, F.R.S., of Bristol ; Sir Henry A. Miers, F.R.S., Principal of the University, Manchester ; Mr. B. J. Padshah ; Lieut.-Colonel A. Smithells, F.R.S., of Leeds ; Professor F. Soddy, F.R.S,, of Aberdeen University ; Mrs. John Baird Smith, Mr. PKEFACE vii William Turnbull, Mr. Robert Dowie Urquhart, Mrs. Worthington, and Dr. Morris Travers, F.R.S. Thanks are also due to the Council of the Chemical Society for permission to photograph the portrait oppo- site the title-page and to the Council of the Royal Society for the figures of apparatus. Professor John M. Thomson, F.R.S., has kindly supplied the excellent portrait taken by him in 1912. A word of explanation may also be looked for in regard to the authorship of the volume. Late in the autumn of 1916 I was requested by the Professors in the Chemical Department of University College to undertake the work. This may have been suggested by the fact that I had already prepared hastily an obituary notice for the Journal of the Society of Chemical Industry by desire of the Council of that Society. I did not, however, feel at liberty to undertake the task until I had been assured that my doing so would be consonant with the wishes of Lady Ramsay. I cannot refrain from offering to her an expression of more than ordinary thanks for the privilege, as I regard it, of being admitted to the view which I now have of her brilliant husband's life and character. I can claim an acquaintance with him of more than thirty-five years, and I can boast of a friendship of at least twenty-five. Nevertheless, I feel that it is only now that I know something of the man. The long series of letters which have been pre- served, extending over nearly fifty years, many of them written in the full confidence of youth and a close intimacy with friends and relations, reveal the dominant viii PREFACE features of his character, which are quite in accord with the estimation formed by the friends who knew him from earliest days. The contents of some of these letters, especially to his wife, are too sacred to be quoted, but they have left deep impressions on my mind, and these I have endeavoured to indicate in the book. Since the beginning of the war it has become more than ever obvious that in the interest of national in- dustries a larger number of able young men and women should be induced to take up the study of chemistry with a serious view to the applications of the science. But it is clear that for this purpose assistance must be given in many cases to enable promising students to follow to the end the protracted course of study necessary. And it is with this object that the movement for a " Ramsay Memorial " has resulted in the scheme which includes provision of opportunities for further study by advanced students of chemistry. It is even hoped that the idea of founding a Ramsay Memorial Fellowship may assume an international character. There is every reason for believing that the scheme would have received approval from Sir William Ramsay himself, with pro- bably two conditions, namely, that the Fellows selected should be chosen by some method which does not involve competitive examination, and that they should devote the greater part of their time during tenure of the Fellowship to scientific research. W. A. T. NOBTHWOOD, February, 1918. CONTENTS CHAPTER I CHILDHOOD AND YOUTH Autobiography — The Ramsay family — Extract from Geikie's Life of Sir Andrew — Grandfather, William Ramsay — Children of W. R., including the father of Sir William — Catherine Robertson, mother of Sir William — Birth of their son, 2nd October, 1852 — Recollections of his early childhood by Mrs. M'Nicol and Miss Flora Mac Vicar — Reminiscences by Mr. M. M. Pattison Muir ; by Mr. R. D. Urquhart — William Ramsay's own recollections, and those of Mr. W. Turnbull — Belmont House at Kilcreggan ; W. R. enters the Glasgow Academy — Recollections by Mr. H. B. Fyfe of the Academy and University — Begins chemistry in Tatlock's laboratory — The friends of his youth pp. 1-27 CHAPTER II AT THE UNIVERSITY Early expeiiences in chemistry — Classes at the University — Correspondence begun with his cousin Ella Ramsay — Holiday in Shetland — Franco-Prussian war in 1870 — Proceeds to Heidelberg and afterwards Tiibingen, 1871 — Attends Fittig's lectures — Life in Tubingen — Practice in German, Italian and French — Billiards — Holiday at home, March, 1872 — Examination in July — Professor Remsen's recollections — Back in Glasgow, autumn 1872 — Becomes Assistant in Anderson's College — Mr. O. Hehner's reminiscences — Trip with his uncle Andrew and family to the Rhine and Switzerland, 1873 — Appointed Tutorial Assistant in the University — First papers — Work on picoline bases — Work on quinine jointly with J. J. Dobbie, 1876 — [Sir James Dobbie's reminiscences — In the University laboratory — Preference for physical chemistry — Appointed Professor at Bristol — Walking tour in Western Highlands, 1878— Excursion to Norway, 1879]— Ramsay at the British Association Meeting in Glasgow, 1876 ; at the French Association at Havre, 1877 ; at the British Association Meeting in Dublin, 1878 — Removal to Bristol, 1880 pp. 28-65 ix x CONTENTS CHAPTER III THE BRISTOL PERIOD The rise of the University Colleges — University College, Bristol : its origin and early history — Ramsay appointed Professor of Chemistry, February 1880 ; Principal, September 1881 — Marriage — Demonstrators successively: D. O. Masson, A. Blaikie, W. L. Goodwin, and Sydney Young — Papers on physical chemical subjects — Dr. Young's account of joint researches on thermal properties of solids and liquids, etc. — Miss Williams' work on food — Ramsay's colleagues — Intercourse with staff of Clifton College and with residents in Bristol and Clifton — Professor Lloyd Morgan's reminiscences — Visits to London — First meeting with Mendeleeff — Financial difficulties of the College — Beginning of the struggle to obtain Government help — Ramsay's part in the movement — Record of events by Professor Hicks — Ramsay at Oxford — Deputation to Mr. Goschen — The first Government Grant, 1889 — List of Papers by Ramsay and Young pp. 66-101 CHAPTER IV UNIVERSITY COLLEGE, 1887 TO 1894 The Professors of Chemistry at University College— Elected F.R.S. (1888) — Beginning work with new Assistant (Dr. Collie) — Assistant Professor Dr. R. T. Plimpton — Admission of women to men's classes — The staff in the Chemical Department — Ramsay's popularity with the students — Methods of instruction in the laboratory — " Experimental Proofs of Chemical Theory for Beginners " — Habits of medical students — Letters to Professor Worthington — Paper on the Molecular Weights of Metals, 1889 — Researches on the oxides of nitrogen — Meeting of the British Association at Leeds — Theories of solution — Discussion — Brownian movement of fine particles — Ramsay's influence at the University of London — Views as to examina- tions pp. 102-123 CHAPTER V THE GASES OF THE ATMOSPHERE Lord Kelvin quoted — Lord Rayleigh's researches on the densities of Difficulty in the case of nitrogen — His appeal to chemists, September 1892 — Discussion of the anomaly, April 1894 — Cavendish's experiments, 1785 — Ramsay's magnesium method of fixing nitrogen — Letters to Mrs. Ramsay and Lord Rayleigh — Publication jointly with Lord Rayleigh agreed upon — Announcement of new gas at Oxford Meeting of British Association — Hodgkin Prize awarded by the Smithsonian Institution at Washington — Special Meeting of the Royal Society, January 1896 — Properties of argon CONTENTS xi — Hillebrand's experiments on uraniferous minerals — Recognition of terrestrial helium — Annual Meeting of the Chemical Society — Properties of helium — Lectures in Paris in March — Journey to Iceland with Professor Ker, August 1895 — Visit to Springs at Cauterets (Pyrenees) April 1896 — Place of the new elements in Mendel^efPs Periodic Scheme — Ramsay receives the Davy Medal, 1895 — Account of helium and argon in the Annales de Chimie, April 1898 — Prediction of other gases — Ramsay President of the Chemical Section of the British Association at Toronto, 1897 — Discovery of the companions of argon, 1898 — Johnstone Stoney on the composition of the earth's atmosphere — Ramsay receives the Longstaff Medal — Contest for the Presidentship of the Chemical Society — Anonymous attacks — Lectures in Berlin — Appendix I. Letter describing the journey through Canada — Appendix II. Apparatus used in isolating Argon from Air pp. 124-157 CHAPTER VI WORK ON RADIUM Radium salts isolated by Madame Curie, 1902 — Discovery of helium as a product from the emanation by Ramsay and Soddy — Origin of the atmospheric inert gases — Density of the emanation (niton) estimated directly by Ramsay and Whytlaw Gray — Experiments on the action of niton on the common elements — Letters to Professor Worthington — Difficulties of the investi- gation— Manufacture of radium salts by the Radium Corporation — Use of radium for medical purposes — The Radium Institute — A new mineral thorianite yields radio-thorium — Mesothoriuin the parent of radio-thorium — Explanation of the source of radio-thorium - - - pp. 158-171 CHAPTER VII LATER YEARS Many official engagements during early years of twentieth century — President of the Society of Chemical Industry — Visit to New York — Address on the " Education of a Chemist "—Address at St. Louis on " Present Problems of Inorganic Chemistry " — The Nobel Prize— Letter from Stockholm — Letter from Switzerland describing reception by Bang Oscar—Presidential Addresses to the Chemical Society, 1908-9 — The electron as an element — Trans- mutation of elements — International Congress in London, 1909 — Voyage to Rio de Janeiro — President of the British Association Meeting at Ports- mouth, 1911 — Excursion to Algiers — Resignation of chair at University College, 1912 — British Association Meeting at Birmingham — International Association of Chemical Societies meeting in Brussels — Removal to Hazle- mere (Bucks.), 1913 — Book on Joseph Black — Visit to Havre, July 1914 Return on outbreak of war — Activity in national work — Illness and death. pp. 172-193 xii CONTENTS CHAPTER VIII VIEWS ON EDUCATION Articles on elementary and secondary education — The Science and Art Depart- ment and Examinations — The older Universities — Letter to Professor Worthington — Popular lectures — Physical Science does not attract all minds — Reference to Martineau — Experience with chemical students in the laboratory — Relation of teaching to research — Conditions of graduation in a university — Examinations should be conducted only by the teachers — Examiner at the University of London — Letter to Professor Smithells — Letter to Mr. Worthington on the recognition of teachers by the London University — Oration at University College, 1901 — Functions of a Univer- sity— Lord Rosebery at the University of London — Views of Mr. Joseph Chamberlain pp. 194-212 CHAPTER IX NOTES ON TRAVELS Wedding trip, 1881 — British Association in Canada, 1884 — Iceland with Professor Ker, 1895— India, 1900-01— Finland, 1907— America, 1912 pp. 213-288 CHAPTER X THE END Difficulty in estimating character — Family influences — Religious practice — Letter to Professor Worthington, 1903 — Quotations from Howells and Jerome — Practical benevolence — Notes by Sir James Dobbie — Conclusion of Autobiography — Ramsay's cheerfulness and enjoyment of fun — Know- ledge of languages — Personal characteristics — Scientific research an absorb- ing interest — Many friends in other countries — Honours — Letter to Professor Smithells, 1910 — A happy life on the whole — Quotations from Ramsay's Memorial Lecture on Moissan — Family life in the home at Hazlemere — Testimonies to character — Position as a scientific man - pp. 289-306 ADDENDUM : LIST OF SIR WILLIAM RAMSAY'S HONOURS - pp. 307-8 INDEX 309 LIST OF ILLUSTEATIONS PACK SIR WILLIAM EAMSAY WHEN PRESIDENT OF THE CHEMICAL SOCIETY - Frontispiece WILLIAM KAMSAY WITH HIS FATHER AND MOTHER ABOUT 1860 - 14 PROFESSOR RAMSAY IN 1881 71 APPARATUS USED IN ISOLATING ARGON FROM AIR - 154, 156 FACSIMILE OF LETTER - isi SIR WILLIAM EAMSAY IN 1912 - 187 xiii BIOGRAPHICAL NOTES 1852 William Kamsay, born 2nd October at Queen's Crescent, Glasgow, the only child of William Kamsay and Catherine Robertson. 1863 Joined the Third Latin Class of the Glasgow Academy. 1866 Entered the University in November. 1869 Entered R. K. Tatlock's laboratory, attending at the same time lectures at the University on Physics, Chemistry, Anatomy and Geology. 1870 In Bunsen's laboratory at Heidelberg. 1871 Easter, proceeded to Tubingen. 1872 August, returned to Glasgow, and appointed Assistant in the Young Laboratory of Technical Chemistry. 1874 Appointed Tutorial Assistant in Glasgow University under Professor John Ferguson. First independent paper (Journ. Chem. Soc. p. 857), " On Hydrogen Persulphide." 1880 Professor of Chemistry, University College, Bristol. 1 881 Principal of the CoUege. Married, August, to Margaret, daughter of George Stevenson Buchanan. 1883 First paper of series jointly with Dr. Sydney Young. 1887 Professor of Chemistry, University College, London. 1894 Isolation and study of argon in association with Lord Ray- leigh. 1895 Discovery of terrestrial helium. Awarded the Davy Medal by the Royal Society. 1897 President of the Chemical Section of the British Association at Toronto. Awarded the Longstaf? Medal by the Chemical Society. XV xvi BIOGKAPHICAL NOTES 1898 Discovery of neon, krypton and xenon. 1900-1901 To India. 1902 K.C.B. 1903 Kecognition of helium as product of the disintegration of radium emanation. President of the Society of Chemical Industry. 1904 Awarded the Nobel Prize for Chemistry. President of the Society of Chemical Industry. 1905 Discovery of radio-thorium. 1907-8 President of the Chemical Society. 1908-9 President of the Chemical Society. 1909 President of the International Congress of Applied Chemistry. 1910 Determination of density of niton (radium emanation). 1911 President of the British Association. 1912 Ketires from Chair at University College. 1916 Last communication to the Koyal Society. Death, 23rd July. CHAPTER I CHILDHOOD AND YOUTH THE Chinaman, whose religion teaches him to reverence the memory of his ancestors, has for ages given in the performance of his devotions an explicit recognition of a principle which only in comparatively recent times has been the subject of much notice in the western world. Everyone now knows that all qualities and powers for good or ill are the products of heredity. " Born into life, man grows Forth from his parents' stem, And blends their bloods, as those Of theirs are blent in them ; So each new man strikes root into a far fore-time." The family tree is therefore not merely traced up for the satisfaction of family pride, but when it conveys some knowledge of the individuals whose names appear on the stem, or rather the two stems, it may possess definite scientific interest. Biography therefore natur- ally takes account of not only father and mother, but of the facts and even the traditions current in the family during as many generations as possible. Ramsay A 1 2 , SIR WILLIAM RAMSAY is a comparatively common name in Scotland, but whether it has any relation to the Ramsey island off St. Davids or the bay in the Isle of Man must be left to the philologists. Certainly it is very widely diffused, for there are Finlanders who bear the same name and trace their descent from the same ancestry as the subject of this memoir. Dr. Johnson is reported by Boswell to have expressed the opinion that " every man's life may be best written by himself." Whatever the reader's view may be in regard to this question the writer who undertakes the serious task of compiling a biography will naturally acknowledge an obligation when it happens that this task has already been accepted by the subject of the book, though he probably feels that the author of an autobiography can do little more than supply facts. Judgment of character and, generally, estimates concern- ing the life and its influence can only be truly supplied by contemporaries. Fortunately in the present case an autobiography, though a mere outline, has been left by Sir William Ramsay and furnishes a modest record down to 1912. This however is written in German, and is to be found as an introduction to Ostwald's volume of Ramsay's Essays under the title "Vergangenes und Kiinftiges aus der Chemie " (2nd edition, 1913, Leipzig : Akademische Verlags-Gesellschaft). An interesting introductory passage in this auto- biography expresses the writer's strong conviction of the all-powerful influence of heredity and refers to the CHILDHOOD AND YOUTH 3 application of such considerations to his own case, pointing out that his forefathers on the paternal side were dyers for certainly seven generations, while on his mother's side they were physicians, "so that it may be safely concluded," he says, " that I had the prospect of possessing chemical instincts by way of inheritance." His father was interested in many directions among scientific subjects. He was a good mathematician and was accustomed regularly to follow the observations and researches of his brother Sir Andrew Ramsay, Director-General of the Geological Survey and successor to Sir Roderick Murchison. These scientific tendencies were shared by the whole generation on the father's side ; for the other uncle, John, became a sugar planter in Demerara, and his factory and laboratory were fur- nished with the newest machines and scientific apparatus connected with the manufacture and examination of sugar. The library and apparatus belonging to this Uncle John descended to the nephew. Aunt Eliza, his father's sister, was an excellent botanist and collected the local flora of many parts of Scotland. On the mother's side the grandfather of the chemist was a physician in Edinburgh and the author of several text-books on chemistry and anatomy for the use of medical students. He died in 1835. His cousin, also named Archibald Robertson, was a Doctor of Medicine and Fellow of the Royal Society, and became known through his medical researches. Three sons of the 4 SIK WILLIAM EAMSAY grandfather became physicians, but they all died comparatively young. The author of the Autobiography is therefore justified in his remark that "whatever chemical talent I possess is an inheritance from my ancestors on both sides " (p. 4). The family history has already been traced by Sir Archibald Geikie in the interesting life he has given of Sir Andrew Eamsay the geologist (Macmillan, 1895), uncle of Sir William. From this volume the following introductory passage may be quoted : " In the little town of Haddington during last century several generations of B-amsays carried on the craft of dyers. At length one of the family, William by name, the son and grandson of previous Williams who had been content to pursue their calling by the banks of the East Lothian Tyne, determined to push his fortune in a wider sphere. He appears to have been a man of high principle and great energy, wide-minded and good-tempered, with a strong bent towards chemical pursuits, and not a little originality as an investigator. About the year 1785 lie went to Glasgow, and became there junior partner in the firm of Arthur and Turnbull, manufacturers of wood spirit and pyro- ligneous acid. Besides making dyer's chemicals and a variety of prussian blue still known as ' Turnbull's Blue,' this firm was the first to manufacture ' chloride of magnesia ' as a bleaching liquor and also ' bichrome.' Had William Ramsay patented some of his processes it was generally believed among his friends that he might have become one of the richest men in the west of Scotland. But he did not consider himself entitled to retain for his own behoof a discovery which, if made widely known, would benefit the general industry of the country, and he was content to remain comparatively poor. The requirements of his business made him an excellent practical chemist, but his CHILDHOOD AND YOUTH 5 interest in chemistry reached far beyond these limits. In 1800 he founded the Chemical Society of Glasgow, into which, by the energy of his example and the kindly courtesy of his manner, he brought those of his fellow-citizens who were interested in the progress of theoretical as well as practical chemistry. He was chosen first President, and among his associates were the well-remembered chemist and mineralogist Thomas Thomson, Professor of Chemistry in the Glasgow University, and Walter Crum of Thornliebank. Two years later, on the foundation of a wider brotherhood of science by the establishment of the Philosophical Society of Glasgow, the Chemical Society was voluntary dissolved. . . . William Ramsay's reputation as a chemist spread outside his own country. His house was one of the attractions to foreign chemists who came to Glasgow, and even long after his death his widow received visits from such men as Liebig, who remembered her husband's meritorious work." There is evidence that this William Ramsay had a distinct inclination toward experimental investigation, for the Catalogue of Scientific Papers, compiled by the Royal Society of London, contains the titles of three papers under his name, as follows : 1. On the Solubility of some of the Earths by means of Sugar. Nicholson's Journal, 1807. 2. On Culinary Salt, with the means of purifying it from substances which contaminate its qualities. Highland Society1 s Transactions, 1816. 3. On the Antiseptic Power of Pyroligneous Acid. Edinburgh Philosophical Journal, 1820. " In the year 1809 William Ramsay married Elizabeth Crombie, a second cousin of his own, daughter of Mr. Andrew Crombie, writer in Edinburgh. The Crombies, like the Ramsays, had for 6 SIR WILLIAM RAMSAY many generations been connected with the trade of dyers. . . . Mrs. Eamsay was a woman of strongly marked character, uniting a firmness of purpose with a gentleness and sweetness of nature that gave her remarkable influence over all who came in contact with her. Clever and wise she had had her natural powers quickened and trained by an excellent education. She was beloved by the young for whom her face used to light up with a cordial welcome. In the esteem and affection of her sons she ever held the foremost place. Her husband died in 1827, and her circumstances became thereafter somewhat straitened, but her cheery spirit and unrufHed temper enabled her to keep a happy, though modest home for her children. She survived till the year 1858. The children of this marriage were four in number — Eliza, born in 1810, William in 1811, Andrew Crombie in 1814, and John in 1816." The eldest son of this family, William, was the father of Sir William Ramsay. Without such striking gifts as his father, brother (Andrew Crombie), or his famous son, William Ramsay was a man of scientific tastes and culture and of a most lovable character. At the time of his father's death this boy of sixteen virtually con- stituted himself the head of the family and accepted the responsibility of this post. In the natural course of events he would have been taken into the chemical works and, in time, would have succeeded his father as partner. He was offered a place as assistant under Thomas Graham at the Mechanic's Institute in Glasgow, but the well-known shipbuilder Robert Napier, a friend of his father's, having invited him to become an appren- tice under him, this was regarded as offering a better prospect for the future. Here he remained five years. CHILDHOOD AND YOUTH 7 In the last two years of his time he attended lectures in the University on mathematics, physics, and chemistry, William Thomson, later Lord Kelvin, being among his fellow-students. Later, as engineer, he took part in the enormous development of the railway systems then extending over the whole country. An accident to one of his eyes having made it advisable to change his occupation, he obtained the appointment of Surveyor to the Scottish Union Insurance Company, and with this company he remained connected for nearly fifty years. After his father's death he lived with his mother and tried to take a father's place to his sister and his younger brothers. It was not till he was nearly forty years of age that he felt free to marry a lady to whom he had been virtually engaged for twenty years. At the time of the elder William Ramsay's death (1827) one of the leading physicians in Edinburgh was Dr. Archibald Robertson already referred to — a man of great charm and ability. His family consisted of five sons and two daughters. The sons were preparing for the medical profession and were very delicate, indeed only one of them lived to take up practice. The consequent anxiety and sorrow made their father neglect his affairs, and when he died, at a comparatively early age, his two daughters found themselves almost unprovided for. The elder who afterwards became the wife of Dr. Jolly, a well-known Scottish theologian, found a post as governess in Dumfriesshire, and though friends offered the younger sister, Catherine, a home, 8 SIR WILLIAM RAMSAY she, with that optimism and independence of character that were afterwards to appear in her son, declined all offers of help, and she too found a situation in the family of Mr. Allan Buchanan of Glasgow, whose wife was a Miss Crombie, a niece of old Mrs. Ramsay. Allan Buchanan was the second son of George Buchanan, a Glasgow worthy of the end of the eighteenth century. His works were the first in Glasgow to employ steam power. Three of his sons were partners. The old man, to distinguish him from the many other Georges of the Buchanan family, was known as " Bonny Geordie," and a large share of his good looks seems to have gone into the family of his son Allan, as they were a strikingly handsome set of young people. It was into this family that Miss Robertson came, at the age of eighteen, as governess, and as it turned out lifelong friend. Not only was she much beloved by her charges, but also by their cousins, a large flock of young Buchanans, and with them all ties were formed that lasted till the end. It was a daughter of one of these cousins (George the son of William Buchanan, Allan's eldest brother), who, fifty years after, became the wife of her son. Miss Robertson was at this time a tall slight, attrac- tive girl, with the side curls and sloping shoulders of the period, but even at that age of a very strong char- acter and clearly defined views. She was not much older than the eldest of her young charges, but from the first made her influence felt. One is tempted to CHILDHOOD AND YOUTH 9 dwell a good deal upon her personality, for it was from her that her son, the future Sir William Ramsay, in- herited many of the qualities that made him what he was. Besides the young Buchanans, Mrs. Allan Buchanan's own first cousins, the Ramsay family, came a great deal to the house, and from the first the eldest brother William and Miss Robertson were mutually attracted. Probably the similarity in their history and their cir- cumstances, both being at an early age obliged to take up positions of authority and responsibility, drew them together, and from that time forward there seemed to be, if not an actual engagement, at least a distinct understanding that they would wait for each other. As her pupils grew up and passed beyond her care, Miss Robertson moved from family to family, always making lifelong friends, though none were ever quite so dear to her as her first charges, the Buchanan family. It was not till 1851 that circumstances permitted the announcement of a formal engagement, both of them being about forty, at that time considered a very late period to embark on the dangers of matrimony. There was much interest felt among their friends as to how such an elderly pair would fit into each other's ways, but a happier couple never lived, and the birth of their little boy in 1852 l was the crowning joy of their lives. Friendly curiosity was again aroused as to how the little boy would be brought up, but anxiety might have been spared, for in spite of their devotion the parents 1 2nd October, at Queen's Crescent, Glasgow. 10 SIR WILLIAM RAMSAY carefully refrained from spoiling their only child. He was a great deal with them, heard them talk, and in- sensibly copied them so that as a little boy he used rather grown up words and ways of speaking. He played quietly with his toys and carried on his child's life alongside of theirs, thinking his own thoughts and only coming out of his dreams when actually spoken to. His mother did all she could to surround him with other children, and the young MacVicars, Langs and Turn- bulls, all friends of the second and third generation, were frequent visitors. Other very early boy friends were the twin McClures — whose mother was Grace Buchanan, Mrs. Ramsay's first pupil — the two Urquharts and Willie Buchanan, who afterwards became his brother-in-law. These friendships never lapsed, and though both the McClures are dead their sons are still friends of the family. From notes supplied by Miss Flora Mac Vicar and Mrs. McNicol, early friends of the family, we know that young Ramsay had a very happy childhood and youth, though in some respects the circumstances surrounding his life were different from those of other boys. His father and mother were both intelligent and affectionate parents, and as Barrie says, in his Margaret Ogilvie, " so much of what is great in Scotland has sprung from the closeness of the family ties." He had not much liking for the games on which boys usually spend so much time. His youthful amusements had a thread of inves- tigation running through them, and in such pursuits as rigging out toyboats or building bricks he always had CHILDHOOD AND YOUTH 11 a plan of his own, though in the result he had sometimes to confess that he had been mistaken. He was fond of reading and among his favourite books were Alice in Wonderland, Hans Andersen's Fairy Stories, and later the books usually enjoyed by boys about lighthouses, fire-brigades, and other practical things. He had a strong love of animals and always had a favourite dog. From his earliest days he had considerable aptitude for music, and at a preparatory school he attended he was the quickest among the little pupils to learn reading music. In later years he was a pupil of Dr. A. L. Peace, organist of Glasgow Cathedral. He also became an accomplished " whistler/' and could accompany him- self on the piano. This accomplishment, it may be added, often gave pleasure to his friends in later life. It was delightful to hear a florid air like Bishop's " Should he upbraid," with all the runs and trills given with perfect clearness and accuracy. His powers as a lin- guist were remarkable and the readiness with which he acquired a new language served him very notably throughout life and on many public occasions attracted admiration. He used jokingly to say that the only language of which the pronunciation had baffled him was Gaelic. His natural inclination for new languages and the method early adopted for their acquisition is illustrated by the reminiscences of Mr. M. M. Pattison Muir. He says : "I can scarcely remember the time when I did not know Ramsay. Looking hack nearly sixty years, I see a small boy 12 SIK WILLIAM EAMSAY seated between his parents in a pew in the front gallery of Free St. Matthew's Church in Glasgow. During the long doctrinal discourses of the minister, I used to wonder what the little boy in the next pew was doing ; he seemed to be intently reading his Bible. In after years he told me he was learning French, or German. Most Scottish boys of that time, all Scottish boys brought up in a Calvinistic household — as Ramsay was — were at home in the language of the Bible. He took a French or a German Bible to church in his pocket ; during the sermon he read it. To translate into English did not require the help of a dictionary ; the English text was at his finger-ends. He used to say that even his mother — a strict Calvinist — could not object to her son reading his Bible in church. As he read, and translated backwards and forwards, he heard what the minister was saying. Years afterwards he often took me back to Free St. Matthew's church by repeating screeds of the sermons of the Reverend Samuel Miller. In a letter I had from Ramsay in 1913, he recalled the old days by drawing a rough sketch of the church and marking the places where various members of the flock used to sit. Unlike many scientific men, Ramsay had an excellent visualising memory. We often wondered, he and I, what the minister meant by praying that one of the Elders of the Church, a big burly man, ' might go in and out as a he-goat before the congregation/ ' Another early friend was Robert Dowie Urquhart, now an advocate in Edinburgh. He tells us that he and Willie Ramsay were together among the first pupils of a Scots-Canadian in a house in the then western- most district of Glasgow. " Our teacher," he says, " I can visualise almost as if he were before me, and I realise that the pupils of that engaging person- ality with his strong features and kind eyes were beginning their school life under the best of auspices. My earliest recollections CHILDHOOD AND YOUTH 13 of William Ramsay connect themselves more with the playtime than the school. In the impressions of him that remain from those playhours the figure of his mother seems peculiarly present. He was an only child and his companions were soon the friends of his mother also. I think I see her on the steps of their house, with shrubbery on either hand. I see the handsome figure with a singularly smiling restfulness of countenance. Her son had a great look of her. At the same time he was about equally like his father whom we boys knew and who had been a school friend of my father's. Mr. Ramsay I can also discern with the mind's eye. He comes before me as a very attractive genial personality, with a kindly smile always ready to light up his pleasant features. I have dwelt thus on his father and mother because on thinking over these early impressions I have come to the conclusion that Ramsay's after-life was the outcome, to a singular degree, of his parents' mentality and of their influence." With the exception of his Ramsay cousins in London (children of Sir Andrew), who were too far away for frequent meetings, and his mother's only nephew Archibald Jolly, son of Rev. Dr. Jolly, who was several years the elder, Ramsay was the only young member of his family circle. He managed however to have a good many of the amusements of youth, not always unconnected with mischief. He used to describe with great glee the beginning of his friendship with the Purdie-Dickson family, a solemn interview with the learned professor on the subject of a broken study window and a catapult which was confiscated on the spot. As he never heard of it being used by its new owner, he always felt this a great waste. There was also a tale of a small brass cannon, which, though 14 SIR WILLIAM RAMSAY packed hard with gunpowder, would not go off, and was, with much indignation, thrown into the kitchen fire with results that were rather startling but fortunately did no harm beyond a hole in an opposite neighbour's dining- room wall. As Mr. Ramsay could not take long summer holidays, Mrs. Ramsay used to take her son to visit her relations and friends for a great part of his vacations. As these were scattered over a great part of Scotland, young Ramsay had, from a very early age, a wide knowledge of his native land. Mrs. Ramsay's only surviving brother, who had been an army doctor, had settled at Strathmiglo in Fife. He seems to have been rather eccentric and something of a woman hater. He paid his professional visits on horseback and taught his young nephew to ride, also the rudiments of golf. At Strathmiglo he had the good luck to have the com- panionship of the " children of the manse," the family of the Rev. Dr. Macara, with whom he spent much of his time. This friendship was never allowed to drop, and the last year of his life he was closely associated with Sir Charles Macara, the eldest of the "Macara boys," in his crusade against the importation of cotton into Germany. Other holidays were spent with his mother's only sister Mrs. Jolly, the wife of the minister of Bowden, in the border country. Their nearest neighbours were the Bruntons, and there at a very early age he made the acquaintance of " Tommy Lauder Brunton." The exact form of introduction is not WILLIAM RAMSAY WITH HIS FATHER AND MOTHER ABOUT 1860. CHILDHOOD AND YOUTH 15 quite clear. One party put out his tongue and the other threw a stone, but which did which and who began hostilities, has always been doubtful. Fifty years after, Sir William Kamsay, as his oldest friend present, proposed the health of Sir Lauder Brunton at a public dinner, and began by saying that he remem- bered, as far back as he could recall anything, playing and quarrelling with that " big, rough boy, Tommy Brunton ! " To an audience, familiar with the delicate frame, the clear cut features, and the chivalrous courtesy of that beloved physician, the description was too delightful, and the laughter was so hearty and so long that it was with difficulty that the speaker could proceed. Dr. Jolly's son became minister in Shetland, and there young Ramsay spent holidays, sometimes with his mother, and sometimes accompanied by a friend of his own age. There he learned to swim and to manage a boat in all weathers. As minister of a scattered parish Mr. Jolly had to go from one island to another, and though to him it must have been irksome and difficult, to the boys who went with him it was a time of adven- ture and delight. They used to arrive cold and drenched and be welcomed at the farms and made much of. Sometimes they had strange fare. Once they had cor- morant, which besides being very tough had " an ancient and fish-like smell." Its state was apologised for, it having been buried only for a week, whereas the proper period should have been a fortnight or three weeks ! 16 SIR WILLIAM RAMSAY The liveliest of all his visits were those to the Turnbull family at the place of Bonhill. A branch of the Turn- bulls' works had been started on the Water of Leven, and the old manor-house was the home of the Turnbull family. It was a curious old house, the property of the Smolletts. It was really two complete houses, at right angles, touching each other but with no passage between. Two sons of the old Mr. Turnbull, old Mr. Ramsay's partner, lived in one house and the widow of their brother in the other. The establishments were separate, but there was constant communication, and one would imagine mutual criticism. The old people took the greatest interest in all that went on in the other house, where Mrs. Turnbull lived, with her large family of sons and one beautiful and charming daughter, afterwards Mrs. Duncan Jameson. They were all high spirited, witty and kind hearted, and the hospitality of the house was unbounded. Formal invitations were quite unnecessary, and however many friends offered themselves, there was always room and a warm welcome. We have the testimony of Mr. William Turnbull (grand- son of the Turnbull who with Sir William Ramsay's grandfather constituted the firm of Turnbull & Ramsay) that young William Ramsay was a very popular visitor at Bonhill. He writes as follows : " Being an excellent raconteur and very musical, lie afforded us all much amusement. He was wiry and athletic, a good pedestrian, rower, and one of the best swimmers I ever met. Even in those days he occupied his idle moments in working out CHILDHOOD AND YOUTH 17 chemical problems, or in devising new chemical apparatus at which he was particularly expert — being very neat handed. When, owing to deaths in our family, I was obliged to give up my farm in the Highlands, in order to carry on our wood distilling business in various parts of the country, I remember with gratitude how much he helped me by his advice and chemical knowledge. He suggested several improvements in our plant, which proved of considerable advantage." It was when staying at Bonhill that Ramsay came to know Loch-Lomond side so well, and picked up many stories with which he used to regale his friends. It was an old gardener at Bonhill who complained that an old gate was fair off its "equileebrum and sair corroborated." About 1901, he was asked by Miss Duncan Jameson, now Mrs. John Baird Smith, to write something in her album. He wrote lines after the fashion of Longfellow's Hiawatha, of which the following is a sufficient sample : " Of your ' weird,' ' quaint,' * splendid ' friendship, Which has lasted generations, Ever since your greatgrandfather, And my father's father sauntered, On the green banks of the Leven, Talking over current prices Of the pyrolignous acid, And the products of the beech-tree, Of the oak and of the alder Heated up to fiery redness In the ovens of Camlachie. May the pinions of that friendship Never moult a single feather, But continue through the ages Unto countless generations." 18 SIR WILLIAM RAMSAY Mr. Ramsay's only sister, who had at a rather advanced age married Mr. Robert Dymock of Edinburgh, had a house at Kilcreggan at the mouth of Loch Long, and there the Ramsays spent much of their time in summer. There Ramsay had a boat, and in it he made long excur- sions alone or with friends. His friends the MacVicars, lived for many years at the head of Loch Goil? a very beautiful loch that branches out of Loch Long, and he used to arrive there, having rowed all the way, some- thing like 18 miles, and often with a rough sea on. Telegraph offices were sparsely distributed in those parts, and there was no way of announcing his safe arrival, but his mother never worried. Oddly enough she was much more anxious about climbing risks than boating ones, and when he first went to Switzerland she was in terror all the time ; whereas in the worst of weathers, she was never anxious about him in his boat. Belmont, as the Kilcreggan house was called, passed to his parents, and afterwards to himself, and remained in his possession till 1898. During that time it was the scene of many happy gatherings not only of his early but also of his later friends. Fitzgerald, Remsen, Ostwald, the Massons — father and son — Sydney Young and Sir John Murray were among the many who stayed there, but this belongs to a later part of the story. In due time Willie Ramsay entered the Glasgow Academy, and of his life at this period we get some glimpses with the aid of a life-long friend, Mr. H. B. CHILDHOOD AND YOUTH 19 Fyfe, who has supplied the following notes of his recol lections : " I met William Ramsay for the first time in August 1863 when we both joined the Third Latin Class of the Glasgow Academy. He and I and William Miller, nephew of the late Dr. Samuel Miller, sat together at the foot of the class for two or three days till the class was arranged in Divisions, and I have a very vivid recollection of him at that time. He continued in the Glasgow Academy till May 1866, taking the Third Latin in 63/64, the Fourth Latin 64/65 and the Fifth Latin 65/66. So far as I remember he did not take any part in the class games, and I do not remember that he took any prizes. I think this was accounted for by the fact that he was nearly two years junior to the average age of the class. There were about 60 boys in the Third Latin and it was divided into two divisions according to seniority. The senior division was con- siderably larger than the junior, and except Alexander MacEwen they were all boys who had been born before the end of January 1851. As Eamsay was not born till October 1852 he must have been about two years below the average in age. He was all the same about the average height. In November 1866 he went to the University and took the usual Arts Degree curriculum. This would be, I think, Latin and Greek for two years, that is till May 1868, Logic and Mathe- matics in 1868/69, and Natural Philosophy and Moral Philosophy in 69/70. I do not think he ever took chemistry in the University. Our friendship began shortly after we went to College. I was attending the Junior Latin Class with him, beginning in Novem- ber 1866, and in addition I took the class of chemistry beginning in October 1866 under Professor Anderson. I remember that one day passing through the Quadrangle I heard Ramsay talking to some students of an experiment which he was going to carry through. I joined them and told him that I was attending the 20 SIR WILLIAM RAMSAY chemistry class and that what he was proposing would be dan- gerous. Next morning he called for me when I was at breakfast about half-past seven, on his way down to College. He said he had read up about what I had said and I was quite right, and we walked down to College together. After that he called for me every morning on the way down. The class began at 8 a.m. and he walked all the way from Ashton Terrace to the High Street, which must be nearly three miles. At that time he knew nothing of chemistry theoretically, but he had for some time been working at home at various experi- ments as we called them. He worked in his bedroom, and there were a great many bottles always about, containing acids, salts, mercury, and so on. When we began to meet in this way, I found he was quite familiar with all the ways of getting the material and apparatus for working in chemistry. We used to meet at my house in the afternoons and do what practical work we could, making oxygen and hydrogen and various simple compounds such as oxalic acid from sugar. We also worked a good deal with glass. We used to go to Spencer's shop in Union Street, and also to White's, the optician's, and buy flasks, retorts, crucibles, spirit lamps and so on, and also materials like zinc filings for making hydrogen, sulphuric and nitric acids, etc. We never got the length of any real analysis, but became quite expert at the things we did, which were usually repetitions of the demonstrations given in the class or described in books. There were a number of old chemistry books in his house.1 I do not know whom they belonged to originally, but they were a good deal out of date. Just before that time there had been considerable changes in chemistry, particularly in the nomen- clature, and spectrum analysis had just been introduced. I remember one book in particular was Faraday's Manipulation. This was a most useful book, and it had been a great stand-by 1 These probably came, at least in part, from the library of the uncle John, the sugar planter in Demerara. CHILDHOOD AND YOUTH 21 with him. He lent it to me about this time. We used to work with mouth blow-pipes and Bunsen gas-burners which we made ourselves, and in this way he became exceedingly expert in working with glass. I think he found this practice very useful in after-life. We made nearly all the apparatus we used except flasks, retorts and beakers. After this session we were very close friends, and I think every summer after that I visited his people, besides meeting very often at our houses and walking together on the Saturdays. I did very little chemistry with him after the summer of 1867, but he continued his home work in the following year, 67/68, while he was attending the Latin and Greek classes. He had no liking for either Latin or Greek and was not much interested in his College work. Perhaps he spent too much time over his scientific pursuits. At that time it was not chemistry alone, for he was also much interested in geology, and in our walks he was constantly pointing out interesting things such as ice marks on the boulders at Arran and evidences of change of level in the ground. He did not begin to study chemistry systematically till about October 1869, when he went to Mr. Tatlock's laboratory in the afternoons, after his College classes for the day were over, and began to work under him. I do not know how long he continued there, but I think he must have kept up this kind of practical work till he left College. In addition to his College classes and chemistry he took lessons in music under Dr. Peace, and also in French and German, the German being under Dr. Schlomka. It was in 1869 that he first went to Shetland to stay with his cousin Mr. Jolly at Walls, and while he was there we first began to correspond, and kept up our correspondence more or less from that time till the end. On the following winter, 69/70, my eyesight failed and for nearly a year I was unable to read. During that time he was exceedingly kind to me in coming to read to me and also in arranging for walks in the country. He must 22 SIR WILLIAM RAMSAY by that time have acquired considerable familiarity with lan- guages, for he read a good deal of Beranger and other French poets. I was not able to understand fully, but that did not make much difference as he was always willing to translate. He was also at the same time trying to learn Gaelic and used to amuse us a good deal by going down to the kitchen to test his progress and to ask questions from a Highland cook they had. In the summer of 1870, when I was in the first year of my apprentice- ship, I went with him to Shetland. His father and mother went also and we stayed at Walls most of the time. I was away three weeks, but they stayed on for a considerable time longer. When we started, about the end of June, there was no thought of war, but when he and I walked into Lerwick after my holidays had expired, we found that war had already broken out between Germany and France. No hint had reached us at Walls. When he came back from Germany he had made a great advance in every way. Before that he was much of a boy, but afterwards he had made greater progress than any of us who had remained at home. Very soon he became Assistant in the Chemistry Department of Anderson's College, and I think was also Assistant in Technical Chemistry there. He must have been in this position for about two years. He did not do any lecturing, but he worked in the laboratory and acted as Tutorial Assistant. During that time we were constantly meeting and took several short trips together in the summers. Somewhere about 1874 we went to Ireland together, meeting one morning in Dublin and going across by train to Galway. From Galway we started on a walking tour through Clare, coming back by rail from Limerick to Dublin. In 1876 we went to Paris together with Guthrie Smith and Charles MacLean and spent about ten days there, and afterwards we went to Normandy, taking the steamer from Havre to Caen. From Caen Guthrie Smith, MacLean and I came home, but Ramsay stayed on. One of the scientific institutions of France, the Association Fran£aise pour 1'Avancement des Sciences, was CHILDHOOD AND YOUTH 23 about to hold a meeting at Havre, and Ramsay waited on about three weeks to attend it. He was preparing a paper on the research work he had done in Germany, and when he went to the meeting he delivered his address in French and was very highly complimented. This, I think, was the beginning of his acquaintance with the notable scientific men of France, which he kept up ever afterwards. I think it was about this same year that he became Assistant to the Professor of Chemistry in Glasgow University, a post which he held until he was appointed Professor at Bristol about 1880. After that came his marriage. Even after that we made several holiday trips together from time to time. In 1887 we made a bicycle tour through England for about a fortnight and had many interesting experiences. We also had one later, round the south of Scotland, and another time we took our cycles to Penzance and bicycled back most of the way to London. Before these excursions we had a short tour up the west coast of Scotland and round by Loch Maree. We also had a trip to Rio de Janeiro in the Royal Mail, in, I think, 1905. Of course I met Ramsay's father and mother very frequently and stayed with them often. I think Ramsay took his scientific bias from his father, who was greatly interested in every scientific subject, and glad to talk about them. Geology was his favorite and it was a constant subject of conversation. Every scientific question, such as Darwinism, was readily and frequently dis- cussed between father and son. His father very often came long walks with us, particularly during the stay in Shetland in 1870, and afterwards at Kilcreggan. When I saw him first he was suffering from an injury to his eye, and at that time he and Mrs. Ramsay came to the Glasgow Academy twice to see the class. It was such an unusual incident that I remember it very well. I think he also took his sociable disposition and broad outlook on life a good deal from his father. His mother was a very notable woman. She had very strong views on all matters 24 SIR WILLIAM RAMSAY connected with religion and the Church, and I think she looked with considerable suspicion on scientific enquiries. She did not oppose or argue about such enquiries, but she certainly did not encourage talk about such subjects as Darwinism, and was immediately up in arms if anything was said that seemed to question orthodox religious views. I think it must have been owing to her that so much of Ramsay's education was devoted to such subjects as Latin and Greek and Philosophy, in which he never took any particular interest. She had splendidly calm nerves and a clear logical head, both of which qualities she passed on to her son. It has been said that he was a dreamy lad in school.1 He certainly was not attentive, but I do not think he was dreamy in the ordinary sense at all. He certainly was not given to reverie. His own explanation was that he could not bring himself to take an interest in the subjects that were taught, particularly Latin and Greek and more particularly the way in which they were taught, and he professed to be thinking about other things when we were worrying over Latin syntax. I remember his telling me that during the sermons in Saint Mat- thew's, he thought he had worked out a good many of the pro- positions of Euclid by putting together the lozenge panes in the windows and seeing how they could work out into different models. He certainly was not attentive in Church either, but anyone who heard his imitations of Davidson of Arran must have been convinced that he could attend to some purpose when he had a mind to. When he came back from Germany he was splendidly equipped both mentally and physically for a successful career. He had perfect health. He could walk 40 miles in a day without any difficulty. He was a very strong and graceful swimmer and could dive further than any amateur I have seen. When we 1 He describes himself in his autobiography as "to a certain extent precocious, though idle and dreamy youngster " (p. 5). CHILDHOOD AND YOUTH 25 were in Paris in 1876 the four of us used to go to one of the baths in the Seine every forenoon, and after the first time, when Ramsay was ready to dive, the bathman would pass round the word that the Englishman was going to dive and everyone in the establishment, including the washerwoman outside, would crowd in and take up positions to watch him. He dived the whole length of the bath and sometimes turned there under water and came back a part of the length. He had absolute control of his nerves and hardly ever showed excitement or embarrassment. He had great vitality and also the advantage of being an excellent sleeper all through his life. With these physical qualities he had also great courage and tenacity. He never seemed to be upset by anything. All the little difficulties which usually turn men back never seemed to make the slightest impression upon him. His enormous vitality enabled him to take up strenuous work of any kind at any time and he never seemed to tire. After a session at College he would look run down, but after two days on holiday he would be as strong as ever and as ready to undertake a full day's work. I always found him exceedingly kind-hearted and considerate. I do not think anyone who needed friendliness or consideration would ever have been passed by by him, and for my own part, especially at the time when my eyesight failed me, he was kindness itself." His college career cannot be said to have been brilliant — partly because he was younger than most of his fellow- students, and partly that the subjects chosen for his study were, for the most part, not those in which he was chiefly interested. The one great desire of his mother's heart was that he should go into the Church ; and though she never pressed this upon him, it seems almost certain that the subjects chosen for his first year's work were selected with that aim in view. His great love of 26 SIR WILLIAM RAMSAY learning languages did not extend to the dead languages as taught in school or college, and he seems to have passed through these classes with but little distinction. To him the pleasantest memories of his college life were of the friendships made there. It is not possible to write of all those friends : " Some with lives that came to nothing, Some with deeds as well undone," mostly all scattered now and many dead ; but there are a few names that stand out. Henry Fyfe, a well-known Glasgow lawyer, already quoted, was both a school and a college friend. So was also "Alec MacEwen," later more widely known as the Rev. Professor MacEwen, scholar, theologian and ardent worker for the gathering into one of the many divisions of the Church in Scotland. His work was cut short by death a few months after his friend Ramsay. There was also George Wardlaw Bur- net, an Edinburgh advocate and one of the brilliant wits of the " Parliament House " of his day. His parodies and other verses are too personal and of interest too purely local to be quoted here. Ramsay received the news of his death at Port Said on his way home from India, just after posting him a long letter telling him all about the tour. There was another of the friends whom they all looked on as the greatest of them all. John Struthers was a man hardly known out of Scotland and there only to a restricted public. He was a minister of the " Reformed Presbyterian Church," of which Butler said all Scots CHILDHOOD AND YOUTH 27 were grim, but none so grim as they. Though he held these views he held them with a wide charity, and he had the gift of a strong sense of humour which rounded off all angles. A more absolutely sincere person it would be impossible to meet, and he was at the same time the most humble-minded of men. In 1895 Glasgow University conferred, or rather it was announced in the papers that it was conferring on him the degree of Doctor of Divinity. It was at once respectfully declined. He said to his friend Ramsay : " How could I have taken it when so many better men are passed over ? " It used to surprise his friends that a man of his gifts should have belonged to such a very small sect, but nothing would have made him change it ; his faith was greater than his creed and his heart than either. Eamsay never felt a holiday in Scotland complete without a sight of his friend, though it was difficult to get him away from his manse even for a night. " You never know who might want you," he used to say. Though their walks in life were so very different his friendship was one of the most precious in Ramsay's life, and his sudden death in 1915 a very great sorrow. CHAPTER II AT THE UNIVEESITY RAMSAY'S acquaintance with chemistry began early, as narrated in Mr. Fyfe's account of his recollections. The autobiography tells us that before he left school he had the misfortune to break a leg at football. During his convalescence he read Graham's Chemistry with the object chiefly, as he confesses, of finding out how to make fireworks. His father supplied him with small quantities of potassium chlorate, phosphorus, sulphuric acid, etc., together with small beakers, flasks, and a spirit lamp, wherewith he amused himself during the tedious months of enforced idleness. It is a little difficult to imagine how such materials could be safely handled while the operator was in a recumbent position, but as no accidents are recorded we are left to suppose that all went well. In Tatlock's laboratory a year was devoted exclusively to analytical work, both qualitative and quantitative. One of the assistants having fallen ill, Ramsay was temporarily promoted to replace him. Here he received his first idea of responsibility. The following year he attended the lectures of Professor Thomas Anderson, known for his researches on the 28 AT THE UNIVEKSITY 29 pyridine and quinoline bases. In consequence of the failure of Anderson's health the lectures were continued by John Ferguson, his assistant, who afterwards became his successor.1 About this time Ramsay also attended the class in anatomy of Professor Allen Thomson, whom he describes as one of the best lecturers he ever heard. His time was, however, chiefly occupied with chemistry and mathematics. While still in Tatlock's laboratory he began attendance on Sir William Thomson's (Lord Kelvin) lectures, as well as hearing the lectures in geology by Professor John Young. He also began to work in Thomson's laboratory, which occupied a cellar in the old college buildings. Here he relates that his first exercise consisted in getting the " kinks " out of a bundle of copper wire^a task which occupied a week. He was then placed before a quadrant electrometer and required to study its construction and use, and after- wards to determine the potential differences between all sorts of surfaces charged or uncharged. Thomson was a most stimulating and inspiring teacher notwith- standing the eccentricities of his lectures, which were chiefly over the heads of his students, and the unusual methods of instruction in the laboratory. Ramsay has given in his essay " Lord Kelvin " a most interesting account of his work and career and a warm expression of his own indebtedness to the teaching and example of his great fellow-countryman. 1 Professor Ferguson died 2nd November, 1916, soon after retirement from the Chair. 30 SIR WILLIAM RAMSAY During these years and throughout life he kept up a correspondence with his cousin, Ella Ramsay (eldest daughter of Professor Andrew Ramsay). In one of these letters (4th September, 1869) he conveys an invitation to his cousins to come to the wedding of hi& Aunt Eliza. In the course of it he remarks : " I think it is six years since we met last at Beaumaris. I have no doubt we have both changed unspeakably." On 24th March, 1870, he writes as follows to his cousin : " I may as well tell you at once that I have become a dangerous character. In fact, I have without putting off this mortal coil, put on a mortal ugly uniform. In other words, as Dr. Young says when he wants to make a very complicated phrase still more complicated, I have joined the volunteers, and may be seen any Monday, Wednesday and Friday from 8 to 9 p.m. right facing, etc." In another letter, dated 21st June, 1870, he describes the journey of the whole family and " my most intimate friend Fyfe " to Shetland, calling at Kirkwall on the way. Shooting, fishing, pony-riding and boating occupied the boys, and W. R. reports to his cousin that he has " got that book of Bach's, and can play most of the pieces. They are extremely difficult. The Gigue and the Gavotte and Musette are very pretty. I have been going in for Mendelssohn's Songs without Words and have learned four of them." On returning from this holiday Ramsay and his mother heard of the war between France and Germany. He had intended to go to Heidelberg to work under AT THE UNIVEKSITY 31 Bunsen. It was, however, deemed prudent to defer carrying this intention into effect for a time, and he therefore remained in Tatlock's laboratory and con- tinued attendance on Thomson's lectures. As soon as the victory of the Germans became obvious he pro- ceeded to Heidelberg, called on Bunsen, and secured a place in his laboratory. As, however, many of his friends recommended strongly Fittig's laboratory at Tubingen, he proceeded there in the spring of 1871, and resumed the work on platinammonium bases which he had been carrying on in Tatlock's laboratory. A number of letters to his father and mother, addressed from Tubingen, have happily been preserved, and they give quite vivid pictures of his life in the University. The letter, dated 7th April, 1871, shows that he stayed in London at his uncle's house (Sir Andrew's), 29 Upper Phillimore Place, on his way to Tubingen. He begins by saying " I have got the passport all right, " but it does not appear when he was to start for the con- tinent. It was Easter, and he probably remained at his uncle's for a few days. The next letter is dated 8th May, Tubingen. Evidently he had got seriously to work, as he says : " I had two explosions to-day." This apparently had something to do with the preparation or use of phosphonium iodide; which is mentioned. He says farther : " I go regularly to Fittig's lecture at 8. He lectures very dis- tinctly and clearly. It is really very beautiful to see the way the organic compounds are arranged. . . . Dr. Remsen, the 32 SIR WILLIAM RAMSAY assistant in the laboratory here, is very obliging and pleasant. He is an American. If I am here in winter, I must board with some family, for it is very difficult to pick up any German, living in lodgings." This intention was carried out later. David King, Sir William Thomson's nephew, arriving in Tubingen at this time, Ramsay reports on 22nd May that he has to-day just succeeded in getting him housed with a German professor's family. His own letters are hence- forward dated " Auf dem Graben," so he also was similarly housed (though whether under the same roof as his friend David King does not appear), for this was the house of Professor Kommerell. This unfortunate man was taken ill suddenly in January 1872, and after some weeks died. This was a distressing experience for the young boarder and in a letter to his mother he expresses his sympathy and admiration both for the widow — " the best specimen of a woman I have ever seen " — and the deceased professor, of whom he says : " I have scarcely ever seen so good a father and pleasant and upright a man. He was about the only man in Tubingen about whom no evil was gossiped. I am just beginning to realise that he is gone. I sat up with the corpse one night and it was rather eerie work. However I did it willingly, as the others had been up the whole night before round his bedside." As the winter came round, there are many references to the cold and the skating. He has to assure his mother that if the Neckar is frozen over, there is no part within their reach deep enough to provide danger. He also AT THE UNIVERSITY 33 seems to have enjoyed very much the American game of base-ball, and became a member of the club. He was intimate with several American students and with Dr. Remsen, the assistant (afterwards the well-known pro- fessor), with whom he kept up a friendly correspondence to the end of his life. His chemical studies in 1871-2 evidently did not occupy him exclusively, for beside his constant practice of German, to which there are several references in the letters, he studied Italian with a lady, always spoken of as the Grafin, who appears to have lost her husband toward the end of the year. He also joined some of his (American ?) friends in arranging to get dancing lessons once a week on Thursday after- noons, " when we have nothing else to do. It will probably be great fun and costs almost nothing here." He also mentions that he speaks French " a good deal with the Ma'mselle. She speaks very fluently, though not with a very good accent." Then he goes on to say : " Papa speaks of your possibly coming out in June or July. Do rub up a little German so as to be able to converse with the Frau. I'm quite sure that you could get up enough to make yourself understood in a month or two. It is so stupid to be with people and not able to say a word. Be able to say der, die, das, etc., and know about fifty words. There will be only three left of us English-speaking people in summer." This free and easy method of learning to speak German was of course suggested by his own linguistic readiness, but to others who have struggled all their lives with 34 SIR WILLIAM RAMSAY this fearful language the process is longer and more difficult. But even Ramsay, after referring to genders and cases, admits, after nearly a year in the country (March 1872), that he is not making as much progress as he would wish, and remarks that "it is fearfully difficult for a foreigner to speak quite correctly, especially on subjects he does not know much about." It will be remembered that his mother was a strict Calvinist and apparently she had been disturbed by hearing that her son had been playing billiards. He therefore tried to reassure her in a letter bearing no date, but written probably in the middle of February 1872. He writes : " You speak of our playing at billiards in your first sentence. There is no harm in playing the game, in fact it is the most beautiful game to be seen, and second the people who keep the billiard rooms (there really are no billiard rooms but just belong to a Wirthshaus) are most respectable people, and third the old gentleman of the establishment is, so to speak, Professor of Bil- liards (or Ballmeister) to the University. Fourthly, none but the most respectable students go there. Fifthly, we never waste time at it, but only take it as a relaxation when we want a little exercise to supply the deficiency of baseball in summer. Sixthly, we never bet, but he pays who loses. Seventhly, the pay is by no means high ; and if those aren't reasons enough, I don't despair of convincing you at home. It's all very well talking, but what can a fellow do when he has not a piano to play (I haven't played an hour since Jany. 3rd), no walks to take, no game, no hooks to read, no fire in your room, and a morbid dislike to sitting down in a Wirthshaus to drink beer and an hour to wait ? Answer me that, my dear Mama, and see if you wouldn't do the same yourself." AT THE UNIVEESITY 35 The question seems to have been renewed, and was disposed of in a letter a little later by the assurance that " I have no intention of playing billiards at home, but in Ger- many it is something quite different. The billiard-room keeper is one of the most respectable persons in Tubingen and holds the rank of university teacher. There is also a university teacher of dancing and of fencing who stand on the same level as he." Having on 8th January announced to his mother his intention of rushing home for a month as soon as the Semester is over, on 6th March, 1872, he writes to his father that he proposes to start from Tubingen on Wednesday evening 13th, proceeding homeward by way of London. As on his way out, he again stayed in the house of his uncle at Kensington. As time went on in his life at Tubingen, Eamsay seems to have felt the increasing pressure of his work, for on 14th June, 1872, he writes as follows to his father : "You appear to think I don't like chemistry so much as I used to. It is quite a mistake. I only object, as I always do, to too much work. I was up this morning, for example, at 5.30 and studied and took my breakfast from 6 to 7, — a class from 7 to 8, one from 8 to 9, from 9 to 3 laboratory (I lunch now to have more time for work, and don't dine till 6), and from 3 to 5 I studied, then from 5 to 6 lecture, and then I dined. And now at 8 I must start again. It is simply all work and no play, except on Thursday afternoons, but Thursday evenings I work as hard as ever." Obviously such working hours could not be sustained continuously, but what was the rule for a student in a 36 SIE WILLIAM EAMSAY German university may well be commended to the notice of those students in English colleges who find difficulty in assembling in a lecture room before ten o'clock in the morning. But the shadow of the approaching examination was over Kamsay and his fellow-students at this time, and on 26th June he tells his father that even the base-ball club has broken up, "as almost all the members are bound on hard study." On 21st July he wrote that " the Exam, is now past I am happy to say." To those who are unacquainted with the method of conducting examinations in a German university at that time it may be interesting to read his account of the process as given in the same letter : " On Monday at 7 it began and lasted till half-past 12 ; then in the afternoon from 3 till 8, so we had a good spell of it. South- worth and I were in together. We went to the Pedells and were shown the questions. They were in chemistry : The resemblances and differences between the compounds of carbon and silicium, and The relations between glycerine and its newer derivatives and the other compounds containing three atoms carbon. And in physics : The different methods for determining the specific gravity of gases and vapours. The phenomena which may be observed in crystals in polarised light. I managed to answer the first perfectly, the second, however, not so well, and the two questions in physics pretty well. Then to-night we had the oral exam. The five professors who compose the faculty were there. Fittig gave some very difficult AT THE UNIVERSITY 37 questions. Reusch (Physics), on the other hand, very easy ones. He is a very nice old fellow and appeared only to wish to make the thing as informal and easy as poss. for us. Fittig, however, put on as grave a face as poss. and shoved in his questions un- mercifully. I had only to reply ' Ich weiss nicht ' (I don't know) once. We had to dress up and put on white kids, and I had to get a ' tile ' especially for the occasion. Then we were sent out after the exam, for about 5 minutes and were then called in and formally told that we had passed." This examination had to be followed by the disserta- tion which led to the Ph.D. degree. The title-page of the dissertation, which is in English, is here reproduced : INVESTIGATIONS ON THE TOLUIC AND NITROTOLUIC ACIDS INAUGURAL DISSERTATION FOR THE ATTAINMENT OF THE DEGEEE OF DOCTOR OF NATURAL SCIENCES AT THE UNIVERSITY OF TtJBINGEN UNDER THE PRESIDENCY OF DR. RUDOLF FITTIG PBOFKSSOB IN ORDINARY OF CHEMISTRY PRESENTED BY WILLIAM RAMSAY, JUNR. OF GLASGOW. TUBINGEN 1872 PRINTED BY L. R. FEUS. On the flyleaf following is the following note, which is 38 SIR WILLIAM RAMSAY not in the present case accompanied by the usual dedica- tion to parents or friends : "In presenting this Dissertation to a highly-distinguished Faculty as candidate for the degree of Doctor of Natural Sciences, I take the opportunity of conveying my thanks to Professor Fittig for having suggested the subject and assisted in the work described in this paper and for his great kindness to me during my stay at the University of Tubingen." The Autobiography records his obligations, not only to the professor, but to Wilhelm Stadel and Ira Remsen, his assistants, as well as to fellow-students Peter Romer, Emil Kachel, Bottinger and Riigheimer. Professor Remsen has supplied the following short account of the days at Tubingen. In the accompanying letter to Lady Ramsay he adds : " After all it must be remembered that your husband was a boy at that time — only 18 when he came to Tubingen — and I was not far removed from boyhood, so that the things I recall of those days are the things that interest boys for the most part. We were at the beginning of our lives with hopes, with aspirations, with some anxiety for the future, with doubts, and yet I do not remember that we ever discussed such matters. I am thankful for the fact that the lives of our group of English-speaking students were wholesome. They were not goody-goody as a rule, but they were not in any sense bad. They were healthy boys with lots to learn and a strong desire to learn. TtJBINGEN DAYS In looking over recently some letters from my old friend, Ramsay, I came upon one dated March 23rd, 1904, that began with these words : ' Who would have thought when you opened AT THE UNIVERSITY 39 the big, front door of the Tubingen laboratory in 1871 and in answer to my question in questionable German — " Konnen Sie sagen wo ist die Vorlesungszimmer ? " you replied after a pause — " Oh, I guess you want the lecture-room," — that I should now write after 33 years to tell you — .' This was one of his favorite stories. I have heard him tell it in public and I have read it in print. That is the way we first met, now 46 years ago. That was the beginning of a life-long friendship. We met perhaps a half dozen times in all these years, but we kept up a fairly active correspondence until the last. I am now asked to give a little account of the Tubingen days. In 1870, Fittig, with whom I had worked at Gottingen, was called to Tubingen to succeed Strecker. He invited me to go with him and to serve as one of his assistants. I accepted, and so it came about that I was holding a minor place in the chemical laboratory when Eamsay arrived. It has always been a source of satisfaction to me that it was I who opened the ' big front door ' for him. This fact gives me a feeling that I have been of some service to chemistry. I remained in Tubingen until the spring of 1872, so that our association was only for one year. He came up for examination for the doctor's degree a year later, but of this second year I know little and that is only hearsay. Ramsay began in the laboratory by working on a problem which had been suggested to him by Tatlock at Glasgow, but he soon put himself wholly under Fittig's direction. At that time Fittig was still much interested in the aromatic compounds which had given him his first success, and it is not surprising that he should have proposed an investigation dealing with compounds in this field. This had to do with the toluic acids. The results furnished the basis for the dissertation which Ramsay presented to the faculty in 1872. In the laboratory I had little to do with him, but out of the laboratory our relations were intimate. I remember that a little group of Englishmen, Scotchmen and Americans then 40 SIR WILLIAM RAMSAY studying chemistry in Tubingen asked me to form a coaching class with the object of helping them in their preparation for the doctor's examination. This I did, and the class met in my room. Ramsay was one of the members of that class. When we were last together, in 1912, he reminded me of those meetings, and told me that he still preserved the essays he had prepared as part of the regular work I had exacted. In a jocose way he always referred to me as one of his teachers, and I must confess that this has given me considerable satisfaction notwithstanding the slenderness of the basis. He was the youngest of our little party and was a great favorite. One of our forms of recreation was base-ball. It so happened that the Americans were in the majority, which accounts for the choice of this particular game. The Englishmen and Scotchmen took kindly to the game and some of them became fairly good players according to the standards of those days. When in 1912 the Johns Hopkins University conferred the honorary degree of Doctor of Laws upon Sir William it fell to my lot as President of the University to make a few remarks, and he replied. Neither of us could refrain from referring to our Tubingen days, and the base-ball club was recalled in public by Sir William. Among other things, he said : ' I tell you the Tubingen base-ball club was not to be sneezed at.' In this connection it is interesting to recall that the present Lord Milner was at times a member of the club. He was not in the University, but came to Tubingen to spend some of his vacations and while there he was invited to join us. As a rule the German students showed no skill in the game. Some of them liked to watch us, but, as far as I can remember, only one ever actually took part in a game and he did not show any aptitude for that kind of activity. Skating was another form of recreation which was very popular with us. In this Ramsay was an adept. On many a winter afternoon we were together on the artificial lake provided for the purpose. This was conveniently situated, so that it was an AT THE UNIVERSITY 41 easy matter to take advantage of a few free hours to indulge in this delightful sport. The old and young of Tubingen, professors and students, and the younger ladies took part, and, as I think back, those seem to have been days of unadulterated joy. Occasionally we came together of an evening for a dinner or something of that sort, though not often, for the evenings were mostly given up to study. One dinner I recall very clearly. I think the host was Stadel, who was then privatdocent in chemistry. The fact that stands out most prominently in my memory is that Ramsay sang for us that time-honored song, ' A fine old English gentleman,' much to our satisfaction. He accompanied himself on the piano too. Those who have known him well in later life know that singing was a pleasure to him and that he was apt to burst into song upon slight provocation. This was a symptom of the happy disposition of which he was the possessor. We all felt itr and I am sure we were all helped by it unconsciously. I cannot re- frain from quoting the last words of the last letter he ever wrote me, dated March 15th, 1916 : ' Well, I am tired, and must stop. I look back on my long friendship with you as a very happy episode in a very happy life ; for my life has been a very happy one.' ' Letters to his cousin Ella show that he was back in Glasgow in the autumn of 1872. He had obtained the post of assistant to the Young Professor of Technical Chemistry in Anderson's College, Glasgow, and on 13th November he informed his cousin that Mr. James Young was written to about the course of lectures he was to have given : " His answer came to-day short and bitter. I do not consider that organic chemistry has anything to do with technical chemis- try, and I consider it would be interference with the courses of the other professors." So this idea had to be given up. 42 SIR WILLIAM RAMSAY The professor at that time was Gustav Bischof, son of the well-known geologist. The professor's knowledge of English was very imperfect and the instruction of the few laboratory students was left to Ramsay. Otto Hehner, now one of the best known public analysts in London, was the professor's private assistant and a close intimacy soon sprang up between the two young men. Ramsay acknowledges his obligation to Hehner 's advice. The latter had been a student under Fresenius and was an excellent analyst. On the other hand, in a sym- pathetic and interesting obituary contributed to the pages of the Analyst in November 1916 by Mr. Hehner, the following passage shows a pleasant picture of family life and hospitable friendliness toward the young foreigner : "His kindly silent father and his most gentle and saintly mother who showed me innumerable acts of kindness while I had upon me the homesickness of a youngster, who prior to his emigration to Scotland had never left the parental house, I hold in affectionate and reverent memory. I spent many evenings at their home, where William enlivened the company with songs, which in later years were greeted with enthusiastic applause by his students at social evenings of the University College Students' Club — 'Marlbrouk s'en va-t-en guerre/ and such like. He had a very good voice, played his own accompaniment and was an expert whistler. He spoke German fluently, with occasional comic lapses which I endeavoured to correct in return for services rendered to me by his rough- hewing my efforts in English. . . . William Ramsay soon became my intimate friend. We were both full of enthusiasm, and as neither of us could obtain advice AT THE UNIVERSITY 43 or stimulus from our professor we were thrown upon our own resources and mutual help. Our daily conversation turned largely, apart from matters arising out of our immediate duties, around philosophical questions renewed occasionally in later years. On his side he was naturally influenced by his inheri- tance from Covenanting ancestors ; I, on mine, by that from unorthodox and agnostic surroundings. As far as I am con- cerned, these most friendly conversations affected the whole of my more mature opinions. Chemically our life at the Ander- sonian was unsatisfactory. ... As a consequence we both freed ourselves as soon as practicable from our engagements. He in 1874 entered into the serene and healthy atmosphere of the Glasgow University." In the summer of 1873 Kamsay joined his uncle Andrew, who, with his sister and eldest daughter, were visiting the Rhine valley with a view to geological investigations. Two letters, one from Bonn (describing visits to Brussels, Antwerp and Cologne) and another from Lucerne, give an account in his usual frolicsome style of their chief adventures : " LUCERNE, 1st September, 1873. MY DEAR MAMA, Here we are at Lucerne and have the prospect of staying till the day after to-morrow. We are going up the Rigi this forenoon : Aunt Eliza and Ella are going to glide up by rail and we are going to attack his monster sides ferociously, geologically and pedestrianly. The view is improving. It rained yesterday most persistently and with an energy worthy of a better cause. So we went to church in the morning and dined in the afternoon. Aunt Eliza took a scuttle in the afternoon into a R.C. Church and participated in the holy water and the various benefits accruing therefrom, thus showing that extremes meet. Ella, 44 SIR WILLIAM RAMSAY Uncle Andrew and I sat and smoked the pipe of peace, at least most of us did. But to-day is rather better and so we are going to scale the hillock. . . . After staying three days in Bingen we went by steamboat to Mainz, where we stayed a night. Then my lamented relatives went on to Strassburg and committed some little follies in the way of sight-seeing there while I struck off for Tubingen via Heidelberg. I started at 10 a.m. and arrived at 7 p.m. The first person I knew was a railway guard, who recog- nised me instantly and we interchanged ideas to our mutual edifi- cation. Then as soon as I was stranded on the station I saw a mighty potentate, a Herr Oberamtmann Lindenmaier, greeted him and conversed for a time. Then I met some of the KommerelTs cousins (she) and conversed with them, and finally, having saluted the hotel-keeper and acquired a room, I saw the Kommerells stand- ing down below. I devoted my best energies in giving a loudshriek- ing whistle. It was literally " Whuslin " on the fast day, for I had had nothing to eat since leaving at 7 a.m., but circumstances excused me. They glanced in the direction of the whistle, and gave me an amazed shout. Next moment we were (figuratively) in one another's arms and I would have fallen on Frau K.'s neck, had she had one to fall on. But she hasn't, I may say. To sum up all in one short word — "jolly." Having renewed old ac- quaintance and called on Fittig and spent the best part of two hours with him, on Friday I started for Basel, saw the Falls of Schaffhausen and met my bereaved relations at Basel next morning. They had come from Mainz and here we are. . . . When I have done Mont Blanc, Monte Rosa and the Matterhorn I shall write again. Adieu. Greetings all round. A kiss to pussy and two to Doran,1 which you must do yourself or he will never forgive you. — Yours affectionately, ^ „ About this time Kamsay became an " Abstractor " for the Journal of the Chemical Society, and continued 1 The dog. AT THE UNIVERSITY 45 doing the work till lie was appointed professor at Bristol in 1879. In 1874 Ferguson succeeded Anderson in the Chair of Chemistry and he appointed Ramsay to the post of Tutorial Assistant. His duties consisted in holding classes to amplify the lectures. There were about two hundred, chiefly medical, students, attending the chemi- cal lectures, and these were divided into four groups, and these had to be " coached " by individual question and answer and weekly written exercises. Each group came to the class twice a week and the consequence was that the teacher learned inorganic chemistry very thoroughly, but the work was monotonous and at the end of the six years in which he was thus engaged it was felt to be exhausting. But he gave some lectures on organic chemistry, which afforded some stimulus and led him to undertaking, though usually alone, some research in the laboratory, for at that time no one worked independently, except a few students whom he had per- suaded. Among these were Arthur Smithells, now Professor in the University of Leeds, and J. J. Dobbie, afterwards Professor in Bangor and now Director of the Government Laboratory in London. As a result he published a notice of a new mineral, bismuthous tesseral pyrites, and a paper on the action of heat on sodium ethylthiosulphate. The cellars of the chemical labora- tory contained the collection of pyridine bases left by Professor Anderson. Eamsay obtained possession of these and proceeded to their investigation. The fraction 46 SIR WILLIAM RAMSAY containing picoline promised to be the most interesting. Beside their derivatives already known, he prepared compounds corresponding to the platinum-ammonium compounds with which he had been already occupied. Experiments on the physiological action of some of these bases induced him to attend the lectures of Pro- fessor McKendrick, then recently appointed to the Chair of Physiology. The results of their joint experiments were published in the Journal of Physiology. The synthesis of pyridine from acetylene and prussic acid by passing them together through a heated tube was accomplished by Ramsay for the first time in 1877. About the same time, in association with J. J. Dobbie, he examined the products of oxidation of quinine and cinchonine. An interesting account of these researches and of the relations thus begun and continued through so many years between the two young men has been given by Sir James Dobbie in a series of recollections of which the following is an abstract. He says : " I first met Ramsay in the summer of 1875, about a year after his appointment as Assistant to Professor Ferguson in the University of Glasgow. I had completed my course for the ordinary M.A. degree and passed the usual examinations. I had also gone through the chemistry course with Dr. Anderson and had begun to work for honours in Natural Science and for the B.Sc. degree of Edin- burgh University, there being then no science degree at Glasgow. Ramsay was delighted to find anyone whose views went a little beyond the routine that was followed by most of the students- AT THE UNIVERSITY 47 and readily gave me assistance. Although no provision for teaching organic chemistry existed either in Glasgow or Edin- burgh, I was required to get up the subject both for my honours exam, and for the B.Sc. degree. Ramsay saw my difficulty and very good naturedly undertook to read the subject with me, and together we worked right through Schorlemmer's Chemistry of the Carbon Compounds. As Ramsay himself had only recently returned from Tubingen, he was familiar with all the most recent developments of the theory of the subject and with the practical methods of investigation in which the German laboratories then excelled, and generously allowed me the full benefit of his know- ledge and experience. He was desirous about this time of starting a class in organic chemistry, but the difficulties in the way were very great. He ultimately overcame them and obtained per- mission to deliver a short course of lectures. The experiment, however, was not very successful. The subject was not required for any ordinary degree, and the number of those who were interested in it for its own sake at that time was not large, and I do not think the course was ever repeated. From the first, Ramsay engaged vigorously in research, for which his official duties left him a considerable amount of leisure. The atmosphere of the University at this time was not unfavourable to research. Kelvin was then at the height of his fame and Gilmorehill was the Mecca towards which all the distinguished foreign physicists who visited the country directed their steps. While at Tubingen, Ramsay had investigated the toluic acids and naturally continued on somewhat similar lines when he settled down at Glasgow. The cellars of the University Labora- tory contained a large collection of fractions of ' Dippel-Oil ' prepared by Professor Thomas Anderson. These were regarded by Ferguson, whose interest in chemistry was almost entirely that of the antiquary, more or less in the light of museum speci- mens, and he was horrified when Ramsay suggested that he should be allowed to ' investigate ' them, but he eventually gave way 48 SIR WILLIAM RAMSAY to Ramsay's importunity. The result was a very substantial addition to our knowledge of the pyridine bases and their deriva- tives. The original papers were published in the Phil. Mag. {Oct. 1876, Oct. 1877 and July 1878) and summarised in J. Chem. Soc. xxxv. 1879. While he was still engaged in this work, in which I occasionally assisted him, I completed my honours exam, and B.Sc. degree and won a scholarship which enabled me to remain at the University and gave me a certain status as Lecturer in Mineralogy. As my duties in this capacity, however, only occupied a part of my time, it was arranged between us in the autumn of 1876 that we should start an investigation of the quinine alkaloids. The method we adopted — breaking down by oxidation with permanganate — which has since been very exten- sively employed, led at once to important results. We obtained pyridine carboxylic acids from quinine, cinchonine, quinidine, and cinchonidine, and thus for the first time succeeded in estab- lishing a connection between these alkaloids and the pyridine bases. We had no idea when we commenced our work that any such a relation existed and, had it not been for the lucky chance that we were familiar through Eamsay's work on picoline with the peculiar smell of pyridine, the true nature of the acids we pre- pared would probably have remained long undetected. Our first paper was published in 1878 — the work having been inter- rupted for a time by my absence during the summer of 1877 in Leipzig — and this was followed by a fuller paper in 1879. Attempts were afterwards made to ignore our work and to assign the discovery to Skraup, but an examination of the dates of the published papers puts it beyond all doubt that ours was the first published work on the subject. Not long after we started the investigation, Ramsay's interests received an entirely new direction, and I was left to carry on the work alone, with only occasional help and advice from him. So far as I know he never again engaged in organic research. AT THE UNIVEKSITY 49 In turning to the physical side of chemistry, I believe he was greatly influenced by Dr. E. J. Mills, who then held the ' Young ' Chair of Technical Chemistry in Anderson's College (now the Royal Technical College), Glasgow, and of whom he saw a great deal about this time. Mills was then engaged in the study of mass action and elective attraction. Ramsay was greatly interested in this work and used often to talk to me about it. Another thing which certainly influenced him was Guldberg and Waage' s work, which was only then becoming generally known in this country. When we were in Norway together in 1879 we tried to see Waage, but he was then on holiday. Ramsay, how- ever, saw him the following year.1 His first important research in physical chemistry was on the volumes of liquids at their boiling points,2 but I cannot recall the exact circumstances under 1 Extract from a letter from Bristol, dated 28th September, 1880 : " I called on Waage and he asked me to spend an afternoon with him at his country house — about half an hour's sail from the town. We had a long chat about things in general. He has given up his experiments on chemical statics. He speaks a little German, and with my knowledge of Norse, which as you know is surpassed by few and equalled by none of the natives of that country, we got along very well. He is great on the liquor question, and nothing would satisfy him but that we should hammer out a letter together to Gladstone, asking him to tax heavy beers with a pro- portionately higher alcoholic tax. I saw afterwards that the People's William thought it a good suggestion." It would perhaps be proper to mention, for the information of the general reader, that Peter Waage was Professor of Chemistry in the University of Christiania. His fame rests on the thesis published by him jointly with his brother-in-law Guldberg, Professor of Mathematics, in which the fundamentally important principle, known as the " Law of Mass Action," is developed. Waage was born in 3833 and died in January 1900. A notice of his life and work will be found in the Transactions of the Chemical Society for 1900 (p. 591) from the pen of Ramsay himself. 2 In the Autobiography Ramsay accounts for the origin of his interest in physico-chemical problems by reference to difficulties he encountered in determining the vapour densities of certain derivatives of dipyridine. Having used Victor Meyer's air-expulsion method, the idea occurred to him that the molecular volume of liquids at their boiling point could be deter- mined by heating a glass bulb of known capacity, containing the substance, in its own vapour. " Once launched on the ocean of physical chemistry," he says, " numerous problems presented themselves." D 50 SIR WILLIAM RAMSAY which he took up this particular piece of work. It was while blowing the bulbs used in this research, I believe, that he first became aware of the value of the asset he possessed for physical work in his skill as a glass-blower. He had learned the art at Tubingen, although it was only in his later researches that his marvellous manipulative power was fully developed. In the ' seventies ' physical chemistry had hardly attained the dignity of a distinct branch of the science, and there were no separate lectureships or professorships on the subject in this country. Specialisation had been pushed a little further in Germany, and I remember attending a course of physical chemis- try by Wiedemann in Leipzig in 1877, but the scope of his lectures was quite elementary. When he turned to physical work Ramsay became aware of the defects of his mathematical equipment and would gladly have remedied them had that then been possible. He did arrange with one of the young University mathematicians for coaching in the calculus, but the coach was not sufficiently keen for a man of Ramsay's ardent temperament and the arrangement — fortunately, I cannot help thinking, because Ramsay could not have gained sufficient proficiency in the higher mathematics to be of real use to him without the sacrifice of much time — was soon abandoned and he continued to devote himself entirely to experimental work. After he had been assistant for several years he became a candidate for such chairs and lectureships as fell vacant, but met at first with little support. He was much discouraged by repeated failures, and I remember we discussed seriously a project for starting together in business as chemical manufacturers. We both had connections in that line and were not unfavourably placed for such a venture. But fortunately before our plans had matured, the Chair of Chemistry in University College, Bristol, fell vacant by the removal of Dr. Letts to Belfast and Ramsay was appointed his successor. He was greatly assisted AT THE UNIVERSITY 51 in this candidature by the close connection that existed between Glasgow University and Balliol College, of which Jowett was then Master. Jowett was a member of the Council of Bristol College. As was the practice in those days, Ramsay sought interviews with the individual members of Council before the election — in plain words canvassed them. He went up to Oxford armed with an introduction to Jowett from Professor Edward Caird. He was graciously received and invited to one of the Master's famous Sunday breakfast parties at which he met a distinguished company. At that time Eamsay had seen more of the world than most young men of his age. He was therefore well able to hold his own at the great man's table, and no doubt the im- pression he made was carefully noted by his host. As he was leaving, Jowett took him aside for a moment and made an appointment with him for the following day. When Ramsay called at the time fixed, Jowett, as if he had never seen him before, and without any other greeting, received him with a sharp ' Well ? ' Ramsay's feelings may be imagined, but he grasped the situation, stated his business as briefly as possible, and took his leave. Jowett proved a good friend. He not only supported Ramsay's candidature, but afterwards invited him repeatedly to Balliol, and evidently formed a just estimate of his character and intellectual powers. In the Glasgow laboratory Ramsay exhibited all the char- acteristics which afterwards became so marked and so generally known. He was a rapid worker ; came quickly to conclusions ; was bold almost to audacity in the things he attempted ; and worked with surprising energy and industry. The only relaxa- tion he allowed himself during the day was an occasional cigarette. As smoking was forbidden in the main laboratory where the students were at work, he retired to the smaller or private labor- atory where the professor's assistants and one or two senior students, who occupied a privileged position, had their work benches. There with his back against the radiator he would 52 SIK WILLIAM KAMSAY roll his cigarette, a life-long practice, and retail or listen to the latest story or the last piece of University gossip. He had a keen sense of humour and delighted especially in the oddities of ' Chemical ' or ' Comical ' John, the bottle washer of the estab- lishment. John was a great character, a strange mixture of shrewdness and simplicity. It was noticed that he absented himself for a few minutes at exactly the same time every morning, and on being followed one day it was found that he went to set his watch by the great clock in the quadrangle. As he was not responsible for the time-keeping, he was questioned as to why he was so particular to have the exact time. He confessed then that he stopped his watch every night and set it going again in the morning. ' You see/ he added, ' it will last just twice as long that way.' Ramsay had a keen appreciation of such humours. He frequently spent his week ends with an aunt at Kilcreggan on the Clyde, and if I remember aright sometimes travelled up and down daily. He had been employed to assist in trans- lating Wurtz's Dictionary of Chemistry for a firm of Glasgow publishers, who proposed to bring out an English edition, — a project which was afterwards abandoned, although a very large part of the translation was actually completed. He always carried about with him, on his journeys, writing material and some sheets of the French text. He wrote with ease in the train or on board the steamer, and as he was paid so much per sheet he would sometimes remark to me as he entered the laboratory that he had earned so much on the way up to town. He translated with great rapidity, and possessed then, as he did all through life, the power of expressing himself easily and correctly. His letters written at this time, of which I have preserved a few, are excellent — gossipy, vivacious, and quite unconventional in style.1 His handwriting differed little from that of later years, except that it was not quite so regular as it became subsequently. 1 One of these letters will be found on a later page. AT THE UNIVERSITY 53 But it was not all work with him. He enjoyed life thoroughly, was fond of society, and went out a great deal to dinners and dances. He was an excellent waltzer, and that and his other social gifts made him much sought after in Glasgow society. Walking and climbing were favourite recreations in which I was frequently his companion. We sometimes spent the week-end together either at his aunt's at Kilcreggan or at Fairlie, my own people's summer quarters. Boating was another favourite amusement. Ramsay had some skill in the management of a lugsail, but with later experience of that treacherous rig I look back with a shudder to a morning I spent with him off Kil- creggan on one of the most dangerous reaches of the Clyde, for he was as venturesome on the water as on the land. In the spring of 1878 we made a short walking tour together through the Western Highlands. Starting from Ardentinny (sung by Wordsworth) on the Clyde we walked to Inveraray, thence to Dalmally at the head of Loch Awe and so on to Oban. We had many adventures by the way, which provided us for long afterwards with matter for jest and laughter. From Dalmally we climbed Cruachan (on a Sunday !), and I remember, when we were standing on the top admiring the magnificent landscape, Ramsay drew my attention to an eagle soaring high above us, the first, I think, either of us had ever seen. We descended from Cruachan into the Pass of Brander, the scene of one of Bruce' s most noted exploits and sacred ground to us on that account, for we had been bred up in all the traditions of Scottish patriotism. Whether under the stimulus of that feeling, I do not know, but we thought to beguile the time by composing a rhyming chronicle of our journey. The only couplet I can now recall was one composed by Ramsay : ' And in the Pass of Brander The scenery grew grander,' and I think that is probably a fair specimen of the level to which our poetic flight rose. An amusing incident took place at Oban. 54 SIR WILLIAM RAMSAY We shared the same bedroom, as was our custom, and before retiring for the night both remarked that the arrangement of the room and furniture was exactly the same as in the inn at Dalmally on the previous evening. Early in the morning I was awakened by a loud voice declaiming : ' Our travellers were now put into a room in all respects like unto the former, and if anyone thinks it was otherwise he is entirely mistaken.5 Ramsay was delivering a lecture in his sleep. He was very wroth when I woke him and told him what he had said. For long afterwards, whenever he was more emphatic in the assertion of an opinion than I thought the occasion warranted, I used to remind him of his dream at Oban and he always took the hint with perfect good humour. From Oban we went by steamer to Fort William and the following morning, the first of May, climbed Ben Nevis. We found the upper part of the mountain covered with snow and had some difficulty, and lost a good deal of time, in getting down into Glen Nevis up which we proposed to walk to the hamlet of Kin- lochmore near the head of Loch Leven. We expected to find shelter there for the night, but in this we were disappointed, and had to choose between crossing by a rough mountain track to King's House near the head of Glencoe and walking to Leven Hotel opposite Ballachulish, a distance of 26 miles reckoning from our starting-point in Glen Nevis. As the daylight was nearly gone when we reached Kinlochmore and there was no moon, the former alternative was out of the question. We therefore made our way as quickly as possible down to the loch, not without difficulty in the failing light, and for more than two hours had to march in pitch darkness before we came opposite Ballachulish. The question then was how to find the hotel ? Luckily we came upon a house in which a light was burning and the occupier who had been kept up late by some domestic occasion good naturedly guided us to the inn. After much banging and rattling we succeeded in rousing the landlord, who not only found us a room, but when he knew our plight, with true Highland AT THE UNIVEKSITY 55 hospitality, provided us with a good supper. It was then nearly one o'clock in the morning. "We had been out from 6 o'clock of the previous morning and had been afoot climbing and walking all the time, with no other food than a few sandwiches. Next day we intended walking up Glencoe, but our feet were badly bruised with the previous day's climbing and we were glad to wait for the steamer and sail back to Oban. It was on this trip that I first became aware of Ramsay's aptitude for languages. In all our conversations he had never, so far as I can remember, shown the slightest interest in philo- logical studies, although he spoke German fluently and had gone through some at least of the University classes in Greek and Latin. But as soon as we got amongst people actually speaking another language his interest was aroused. We both knew a few Gaelic words, as most inhabitants of the West of Scotland do. I was content to let it rest at that, but Ramsay was bent on learning Gaelic and extracted words from every Gaelic-speaking person we came across. What struck me as peculiar was that he took little or no interest in the traditions or manners of the Highlanders, only in their language. In our Highland tour we had proved that we were pretty equally matched as regards our powers of physical endurance and that we possessed the compatibility of temperament that is essential for the success of such expeditions. We resolved accordingly on a walking tour on a more extended scale in Norway in the long vacation of 1879. We sailed from Leith to Christiansand and were fortunate enough to have as one of our fellow-passengers Dr. Amund Helland, now one of Norway's fore- most geologists and at that time, I believe, a privatdocent attached to Christiania University. When he found that Ramsay was a nephew of Sir Andrew Ramsay and that we were both interested in geology and mineralogy he became very friendly with us and sketched out a plan of tour which we found of the greatest assistance. As he was in no hurry to return to Christiania, he 56 SIB WILLIAM RAMSAY volunteered to accompany us to Hitter in Flekkefjord, where large pegmatite veins occurring in the 4 Norite ' of the island had recently been opened up and found to contain many rare minerals. Accordingly after a night's rest at Christiansand we caught a coastwise steamer going north, which landed us on Hitter. There was no inn on the island, but we got comfortable quarters in a fisherman's house which was built on a ledge of rock overhanging the fjord. Here we fed sumptuously on trout, salmon, eggs, milk, flad brod, and coffee, our first experience of genuine Norwegian fare. The granite veins of the island were a sight never to be forgotten. The crystals of felspar, mica, and quartz were of enormous size, compared with anything we had previously seen, and mingled with them and projecting from the roof and sides of the cutting were large bosses of euxenite, orthite, and other minerals of the rare earths. On receiving Holland's assurance that there was no objection to our helping ourselves, we secured a goodly supply of fine specimens — most of which are now in one or other of our museums — and dispatched them to Christiania to await our arrival there. Long afterwards, when Eamsay was engaged on his search for sources of the rare gases of the atmosphere, he bethought him of our Hitter finds and made a systematic examination of them. The only one, however, which gave him any positive results, was c Malacon,' a hydrated variety of zircon, which he found to contain helium. Helland returned direct from Hitter to Christiansand and we crossed to the mainland and made our way by carriole, train, and steamer to Bergen and thence sailed up the Hardanger Fjord to Odde. We made many acquaintances in Bergen and on board the steamer, some of whom we met again and again in the course of our tour. Amongst them I particularly remember two daughters of the Federal General Lee. As we sailed up the Fjord we were con- stantly reminded, especially in the lower reaches, of our own Scottish lochs. The last part of the sail, where the Fjord narrows and the mountains seem in places to rise sheer from the water, AT THE UNIVEKSITY 57 is very grand, especially when seen as we saw it in the deep shadows of an autumn evening with the moon lighting up the white edge of Folgefond snowfield, where it shows through the clefts of the rocky summits. Young Scotchmen are not usually sentimental and are not given to expressing their feelings on such occasions, and we were silent. But the spell of the fjords was upon us from that time and we both re- visited them, although not together, again and again. Odde, the landing-place at the head of the Fjord, was then quite unspoiled and consisted of little more than a picturesque hotel near the landing-stage, and a few scattered houses. Now, I hear, all is changed by the huge nitrogen works which have been erected in recent years. We stayed here several days, visiting the Buarbrae (Glacier) and the Skjaeggedalsfos— a fall of from 500 to 600 ft. We were both greatly interested in the geological features of the country and spent much time in examining the action of the glacier, the moraines, the cirques and, later on, the raised beaches, which are nearly everywhere along the coast such a prominent feature of Norwegian scenery. Ramsay was well informed as to his uncle's views, which afforded us material for many discussions and much speculation in the light of our own experience. Our visit to the Skjaeggedalsfos was a memorable occasion. The way was long and rough and the journey had to be performed entirely on foot, but we felt fully rewarded by the magnificence of the scene ; it was the first of the great falls we visited. On the way back we were caught in a perfect deluge of rain and got soaked to the skin. We had no change of clothes with us, as we carried nothing but our knapsacks. When we reached the inn, our host, evidently quite accustomed to such experiences, turned out various ancient suits that must have been in his family for generations and in these we adorned ourselves for supper. Presently two Austrians, who had also made the excursion to the fall, returned in the same condition as ourselves. By this time the clothes of the inn had all been appropriated, m SIR WILLIAM RAMSAY but the Austrians were not to be beat. To the delight of the other guests they appeared at supper in kilts improvised for the occasion out of Norwegian homespun bed coverlets, which were decorated with the beautiful coloured border common in this part of Norway. They were both large-sized men of the typical South German build, and their appearance in this guise was the signal for general merriment, especially when one of them pro- ceeded to execute a dance. We were all in high spirits after our day in the open air. The Austrians were capital fellows, full of jokes and stories, and we spent a very merry evening together. We found out later, when the time came for the inevitable exchange of cards, that one of them was a judge in one of the higher courts of Vienna and the other an advocate who practised in the same court. We saw a good deal of them afterwards and found them excellent travelling companions. From Odde we made our way by steamer, rowing boat, and on foot to Vossevangen, where we rested for a few days. One evening spent here dwells in my memory. The hotel, at that time one of the few hotels in Norway outside the large towns, was much frequented by Norwegians from Bergen. It boasted a piano, and after supper Ramsay commenced to play and then to whistle, — an accomplishment in which he excelled. Soon this unusual form of entertainment attracted listeners, and after a time all the guests were gathered round him applauding vociferously. Then we sang national songs, and all went merrily until we came to the Marseillaise, when three Germans, who were of the party, clapped on their caps and strutted out of the room to the intense amusement of the rest of the company. At that time the Germans had neither destroyers nor submarines and the Norwegians stood in no fear of them. Most of our travelling was done on foot. We carried nothing with us but our knapsacks and it was necessary to wash up from time to time, which we generally did for ourselves, retiring to some secluded spot by the side of a stream for the purpose, and hanging out our washing afterwards over our knapsacks to AT THE UNIVEESITY 59 dry as we marched. We halted for a day or two at intervals to rest and refit. During these rest periods we usually devoted our time to exploring the immediate neighbourhood of our stopping place, making the more intimate acquaintance of the people, and trying to pick up what we could of the language. We had with us a Norse Dictionary, a never-ending source of amusement on account of the quaint equivalents with which it abounded. But we trusted to what we could learn viva voce, and must have made some progress with the language, for I find amongst my letters several in Norwegian from travel acquaintances which contain the assurance that my knowledge of their language was a sufficient excuse for using it in writing to me. Ramsay's great aptitude for languages enabled him to make very rapid progress, and he afterwards continued the study both at home and on subsequent visits to Norway and became very proficient in it. I noticed in Norway again what I have referred to in connection with our Highland trip, that his interest in the language was much greater than in the history and traditions of the people, to which so far as I remember he paid very little attention. He took great pleasure, however, in the Norse folk-songs, many of which we learned from chance companions on our walks. We found great interest in compiling lists of Scandinavian words which, although not known in England, are in common use in Scotland. These words were either introduced into Scotland by Scandinavian settlers or are survivals of the common Teutonic vocabulary which persisted in Norway and in the northern parts of the British Isles after they ceased to be used elsewhere. I remember the delight with which we first heard ' barn ' (Scot, bairn) ' child/ and ' gjore' (Scot, gar) ' make do,5 and many others with which we had been familiar from our earliest days but had never before heard out of our own country. Another amusement of Ramsay's during our longer halts was sketching in water colours, an art in which he possessed no inconsiderable share of the talent which belongs to his cousins, 60 SIK WILLIAM EAMSAY Sir Andrew Ramsay's family. His sketch book was in existence quite recently and may be so still. He took particular pleasure showing me from time to time a drawing he made of me while I was bathing and supposed he was engaged in sketching the surrounding scenery. After leaving Vossevangen we went by way of the Nerodal, famous for its beautiful white labradorite felspar rocks, and Gudvangen to Loerdal on the Sogne fjord, and thence crossed from Skj olden into the Jotunheim, to see something of the great alpine lakes and to climb Galdhopig, the highest peak in Norway. R^dsheim, from which we made the ascent, is one of the most delightful of Norwegian stations, where, at that time at all events, Norwegian life could be seen in all its native simplicity, little if at all spoiled by any contact with the outer world. R^dsheim, — in Norway as in Scotland the proprietor is often known by the name of his farm or estate, — found us a guide in Knut Volo, the village shoemaker. We were in no way equipped for an alpine climb, but Volo, after inspecting our boots professionally, and strengthening them with some nails, undertook to go up the mountain with us. The greater part of the ascent consisted of a long walk, which presented no kind of difficulty until we came to the great glacier which had several ugly crevasses to be crossed. The upper part of the mountain was covered with a sheet of frozen snow, over which we had to cut every step we took. We astonished our guide by bathing in a small tarn high up on the mountain. Large masses of ice were floating about in the water, which was of course bitterly cold. Volo evidently thought we were stark mad, the feeling which I am afraid our doings and the doings of many other Englishmen abroad often arouse in the foreigner. It was a foolish proceeding, and had we not been in first rate physical condition at the time might have cost us dear. On emerging from the Jotunheim, we crossed into Gudbrandsdal, and from Domaas made the ascent of Snehaetta, the second highest mountain in the Dovrefjeld. This was one of the least AT THE UNIVERSITY 61 interesting of our excursions, nothing but a long 14 hours' tramp over moor and barren hill side, and I only mention it as another illustration of Ramsay's powers of endurance in the seventies. We next descended the Romsdal, and after a day or two spent at Molde went on to Throndhjem, from which we returned by rail to Christiania. At Christiania we again met Holland, who showed us over the city and initiated us into the mysteries of Scandinavian politics. We learned then for the first time of the cleavage between Swedes and Norwegians. We had met few Swedes in the course of our trip and had often been struck by this. Even then the movement which subsequently led to the separation of the two countries was in progress. The Norwegian flag, in which the Swedish colours were quartered with those of Norway, was always referred to as the ' dirty ' flag and we were assured that the Norwegian people would never rest satisfied tttl it was cleansed — an aspira- tion which was satisfied sure enough but not till many years afterwards. Holland himself was closely identified with the young Norway party and introduced us to several of the nota- bilities in politics and literature at the University club. We left Norway after a six weeks' tour with the pleasantest memories of the country and its people. We both returned repeatedly but never again in company. Our passage back was very rough. R-amsay was a good sailor and I a bad one, but I think that was the only advantage he had over me as a traveller. After Ramsay's removal to Bristol he continued to visit Glasgow periodically so long as his father and mother were alive, but of course I saw much less of him than formerly, and although we continued to correspond, I have little to tell regarding the period after 1880." It has not been thought advisable to interrupt the interesting story told by Sir James Dobbie, but one or two incidents not referred to in these notes are recalled 62 SIR WILLIAM RAMSAY by letters which have been preserved, some addressed to his parents and some by the same friend. In 1876 the British Association met in Glasgow, and Ramsay's name appears for the first time in the list as an annual sub- scriber, but no communication from him is recorded. The following year he attended a meeting of the Associ- ation Frangaise pour PAvaneement des Sciences at Havre. The following letter to his friend Dobbie gives an account of his doings : "LE HAVRE, Monday, the Something or other August, 1877. MY DEAR DOBBIE, Some fool of a Frenchman has stolen all the paper belonging to the French Association, and has left only this half sheet with Le Havre at the top. From the preceding sentence you will have already guessed that the French Ass. is capering around Havre at present, that I form one of the distinguished foreign members, and that all is going as merrily as a marriage bell. Voici 5 jours that I find myself here. I went to Paris with three spirits more wicked than myself, lawyers — a fearful compound 3 lawyers l and a chemist, — just like NC13 for all the world, liable to explode at any moment. Their names were Mr. Smith from London and two others with less aristocratic designations. I shall sum up all our exploits shortly thus — Sleep, grub and amusement, — such was the programme. I called on Wurtz, Schutzenberger, Silva and others and heard that there would be no chance of my doing anything in Paris, and that all the chemists would be absent at Havre. So as I was a fortnight too soon I accompanied my friends to Havre, 1 These were H. B. Fyfe, Guthrie Smith and Charles MacLean. See- Mr. Fyfe's notes, Chapter 1. p. 22. AT THE UNIVERSITY 6» secured rooms, took a walking tour in Normandy and Brittany for a fortnight, and behold me at length here since last Wednesday r taking part in the Ass. It is the best thing I could have done, for I have made the acquaintance with a whole lot of chemists, Dutch and French, and have found an old Dutchman named Gunning ravished to find someone who shares his ideas about matter, chemical com- bination, etc. We excurted together yesterday the whole day and talked French and German alternately all the time. When we wanted to be particularly distinct precise French was all the go. For energy and strong denunciation German came of use. You can't say ' Potz-teufel ! ' in French or ' Donnerwetter potztausend Sacramento ! ' An old cove, also a Dutchman, De Vrij, with bowly legs and a visage like this [sketch profile] is also a very nice old boy. The nose is the chief feature of resemblance in the annexed repre- sentation. Wurtz and Schiitzenberger are both Alsatians and of course are much more gemuthlich than the echter Franzose, but on the whole the fellows I have got to know are very pleasant. Some of the younger lot and I kneipe every evening. Then we bathe every day too in fine stormy water. Eh bien, what is there to say of more ? I am going straight back to Glasgow on Wednesday by the special steamer to Glasgow. My money is about done, so I must bolt. I have done with holidays this year and am as a giant awakened. Do come back before the session commences, and let us get some work done. By the way I forgot to tell you that I had the cheek to read a communication on picoline, in French, which was received with loud applause. There were some remarks made afterwards very favorable, tho' I say it as shouldn't say it. Adoo. Write to- Glasgow and tell me Wie's geht. Yours very sincerely, W. RAMSAY." €4 SIE WILLIAM RAMSAY The next year he attended the British Association meeting in Dublin and communicated two papers, " A Summary of Investigations on the Pyridine Series " and on " Some of the Derivatives of Furfurol," beside showing Victor Meyer's apparatus for taking vapour densities of substances with high boiling points. In a letter to his friend Dobbie he remarks : " By the way the British Ass. is going to Bray this year." This letter was written from Wales, where apparently he had been staying with his uncle's family, " dolce- farnienteing in a delightful manner. Lawn-tennis, bath- ing, mild (and harmless) spooning, hill-climbing, etc. (Etc. being all the other vices practised at a place border- ing on hills and sea), have been the sole aim and object of existence since I came to Wales." In 1879 the promotion for which he had so long been hoping came at last. He was appointed Professor in University College, Bristol, and took up his new work early in the new year. The following extract from a letter speaks for itself : " UNIVERSITY COLLEGE, BRISTOL. 12th March, 1880. MY DEAR DOBBIE, This letter must be written en Jingle. Arrived safe — Monday night — fair lodgings — change with Marsden when he goes next Monday — like the place — Lab. in confusion but good — Fifteen students in Lab. 40 at lectures — Nicol lecturing till end of term — Marsden nice fellow — going to Germany at AT THE UNIVEKSITY 65 It is interesting to note that the last meeting he ever attended was also at Havre in August 1914, which broke up disastrously at the outbreak of war. A letter de- scribing what happened on that occasion will be found on a later page. CHAPTER III THE BRISTOL PERIOD THE years following 1870 saw the beginning of that great national movement which has resulted in planting new universities and colleges connected with universities over the United Kingdom. Up to that time institutions which gave higher education and instruction corre- sponding to that which was provided by the ancient universities of England, Scotland, and Ireland were only to be found in Manchester and London. In the former city the college which bears his name was founded by John Owens in 1851. In London there were three colleges, namely University College (the original Uni- versity of London) founded in 1826, King's College founded in 1829, and Bedford College for Women founded in 1849. For nearly twenty years these in- stitutions struggled, with somewhat indifferent success, against mid- Victorian prejudice and nervousness, as indicated by the sensation produced by the publication of Essays and Reviews and the storm aroused by Darwin's Origin of Species and The Descent of Man. But in 1871 the first step toward a new state of things was repre- 66 THE BRISTOL PERIOD 67 sented by the foundation of the Armstrong College at Newcastle-on-Tyne. This was quickly followed by the establishment of the University College of Wales at Aberystwyth in 1872 and the Yorkshire College at Leeds in 1874. On the llth June, 1874, a public meeting was held in the Victoria Rooms, Clifton, Bristol, with the object of promoting the establishment of a college of science and literature for the West of England and South Wales. The movement thus initiated was supported by the influence and financial aid of the two great Oxford colleges, Balliol and New College. Among its most ardent promoters were the Master of Balliol (the Rev. Dr. Jowett), the Headmaster of Clifton Col- lege (the Rev. Dr. Percival, afterwards Bishop of Here- ford), Mr. Lewis Fry, M.P., and Mr. Albert Fry, who afterwards became the very active Chairman of Council, together with several other Bristol citizens, among whom may be mentioned William Killigrew Wait, who became Vice-Chairman, and William Proctor Baker, who acted as Treasurer. A second meeting was held the following year, on the occasion of the meeting of the British Association in Bristol, and in 1876 the College was opened. The premises first occupied were situated in Park Row, near the top of Park Street, and consisted of a very old and dilapidated house where the classes were carried on and a chemical laboratory fitted up while the permanent buildings were in process of erection. The first Professor of Chemistry was Dr. E. A. Letts, who left at the end of 1879 on being appointed to the 68 SIR WILLIAM RAMSAY Chair of Chemistry at Belfast, then vacated by Dr. Thomas Andrews, P.R.S. Ramsay had also been a candidate for this post, but luckily for Bristol he was not selected, and in February 1880 he was chosen to succeed Letts. Conditions in reference to teaching appointments have been ameliorated since that day. but it is interesting to place on record the stipend and duties of a professor of chemistry in a university college forty years ago : UNIVERSITY COLLEGE, BRISTOL. CHAIR OF CHEMISTEY. The Stipend will be £300 per annum, with two-thirds of Lecture fees and one-third of Laboratory fees. The Council guarantee a minimum emolument of £400 per annum. The Laboratory expenses will be borne entirely by the College. The Laboratory student's fee will be £18 18s. Od. per session (with reductions for shorter periods). The session will commence at the end of the first week in October, and continue until the end of June. (In after years the Professor may be required to give instruction in Practical Chemistry during July to medical students.) The Professor will be required to give three lectures per week for the first two terms, say 60 lectures, together with class in- struction in connection therewith (student's fee for this course, £3 3s. Od.), and a short course of lectures in the third term. He will also be required to superintend the Laboratory during the whole session, and to give evening lectures once a week during the first two terms, together with class instruction in connection therewith (Evening-Class fee, 10s.). A competent assistant will be provided. The scheme of the College contemplates the possibility of THE BKISTOL PERIOD 69 occasional lectures being delivered in neighbouring towns by the Professor or his Assistant. In connection with the Cloth-working Industry, special in- struction in dyeing, etc., may be required under an arrangement not yet concluded with the Worshipful the Cloth-workers' Com- pany of London. It will be observed that no mention is made of research, and the number of lectures is somewhat indefinite, though appreciably less than the number introduced into the programme of other colleges established about this time. The state of things at Bristol is illustrated by the following extracts from a letter of Ramsay's, dated 4th March, 1881 : " I have been very hard worked and am still. The beastly Trowbridge lectures take it out of one so much, both in the loss of a whole day, as well as in preparation. I haven't done a stroke of original work this term, for all my time has been absorbed in learning how to dye. . . . Otherwise I have eight lectures a week, which means a lot of time. I long for summer with three lectures a week and nothing else but laboratory. . . . Otherwise things here are very quiet. I have no time to go out to dinner, etc., and have consistently refused. All I keep up is the singing club on alternate Fridays, but that even I have missed for the last two meetings. I'm going to-night." The first Principal of the College was Alfred Marshall, afterwards Professor of Political Economy at Cambridge. He resigned in 1881, and in September of that year Ramsay was appointed Principal in his place. The following letter from Professor Marshall to 70 SIR WILLIAM RAMSAY Lady Ramsay on 24th July, 1916, explains the cir- cumstances : "You will be overwhelmed with letters from far and near, which speak with better knowledge than mine of the terrible loss that has befallen the world's science : my only claim to speak of him is that he rendered me the greatest of all services. In the autumn of 1880 I was rapidly dwindling. I knew that each month of my stay at Bristol materially lessened my chance of living to do any considerable part of the work on which I had set my heart. The Council of University College, Bristol, de- clared that the condition of their finances prohibited their adver- tising for a new Principal. The new Professor of Chemistry began his work in late September, by the middle of November I knew I was free. For a true strong MAN had come to the College, and young as he was I knew that the destinies of the College were safe in his hands. They turned out to be much more than safe." The following extract from a letter sent by the Council of the College to Professor Ramsay, 28th September, 1881, shows the conditions of the appointment : " That Professor Ramsay be appointed Principal of the College, and that he receive as Principal, in addition to his present remun- eration as Professor, one-eighth of all the fees, other than entrance fees, with a guarantee that his share of such fees shall not be less than Two Hundred and Fifty Pounds per annum (£250), and that the engagement be terminable by either party on three months' written notice." To a young man under thirty years of age, and just married, the temptation of a substantial increase of income was no doubt irresistible. But it can easily be understood that the additional burden of duties PROFESSOR RAMSAY IN 1881. THE BRISTOL PERIOD 71 might reasonably be expected to curtail seriously the time available for study and the continuance of experi- mental research. This, however, does not seem to have interrupted the output of results from Ramsay's laboratory, for in the years 1881 and 1882 five papers were communicated to the Chemical Society, one being the joint production of the Professor and the Demon- strator David Orme Masson, who later became Professor of Chemistry in the University of Melbourne. Ramsay was fortunate in having a succession of able assistants in the teaching work. Masson left the College in 1881 and was succeeded by Dr. Adrian Blaikie (who died a few years after leaving Bristol in 1882), and for a very short time Mr. W. L. Goodwin occupied the post. He was succeeded by Dr. Sydney Young in 1882, who remained in association with Ramsay till the departure of the latter five years later for University College, London. Young was then appointed to the vacant chair. When Dr. Young went to Bristol in 1882 he found Ramsay engaged in two investigations : the first on the specific volumes of liquids at their boiling points, and the second the determination of the vapour pres- sures and critical constants of benzene and ether. The supposed phenomenon of " hot ice " had also just previously occupied a good deal of attention, and in the investigation of all these subjects Ramsay invited Young to join him. The result was a series of papers on the thermal properties of solids and liquids and on the relation of evaporation to dissociation, which extended 72 SIR WILLIAM RAMSAY over and beyond the whole of the five years in which the authors were associated together. This period is so full of scientific interest that Professor Young, at the request of the writer, has been good enough to prepare a resume of the whole of the results of their joint work, and has added a complete list of the papers in which it originally appeared. The list of papers will be found at the end of the chapter. Professor Young's notes are as follows : " I was one of the Secretaries of the Owens College Students Chemical Society at the time of the discovery by Carnelley that ice, when heated under very low pressures, cannot be melted. This discovery aroused great interest, and Sir Henry Boscoe asked me to show the experiment to the Chemical Society. On considering the matter I came to the conclusion that the volati- lising point of ice, like the boiling point of water, probably depends on the pressure. If Carnelley's opinion that the temperature of ice rises above 0° C. (strictly speaking 0*007°) was incorrect, it would probably be found that the vapour pressure curve for ice is identical with the volatilising point curve, just as the vapour pressure curve for water is identical with the boiling point curve. If, on the other hand, the ice really becomes hot, there must be a new curve, as yet undetermined. I gave this explanation when showing the experiment at the meeting of the Chemical Society, and it was at once accepted by Bohuslav Brauner, then a Fellow of Owens College (now Professor at Prag), who advised me to publish the paper at once. Sir Henry Roscoe, however, was less confident and dissuaded me from sending in the paper. Afterwards there was much discussion in Nature and other journals, and after Pettersson had given a somewhat similar but partly incorrect explanation, I wrote a letter to Nature stating the facts and giving my explanation. [Nature, 24, 239 (1881).] THE BRISTOL PERIOD 73 I then spent a year at the Strassburg University and, while there, took lessons in glass-blowing from a professional glass- blower. In Bristol, after making a Wollaston's cryophorus for my evening lectures, it occurred to me that by altering the size of one bulb and fusing in a glass rod ending below in a knob about the centre of the smaller bulb, one might get a block of ice sus- pended in this bulb and Carnelley's experiment might be much more easily carried out than by his rather cumbrous method. The result was quite satisfactory and I showed the experiment to the Owens College Chemical Society, and described the apparatus in the Chemical News, 47, 104 (1883), mentioning at the same time that Prof. Ramsay and I proposed to investigate the question of the temperature of the ice by inserting a thermo- meter in each bulb. The thermometer in each case was passed through a tube of suitable size, a wired indiarubber tube serving to keep the thermometer in position and to make the cryophorus airtight. With this apparatus we were able to prove that the ice does not become hot even when the temperature to which it is subjected is very high, and also that the temperature of the ice falls when the pressure is lowered by cooling the larger bulb by means of a freezing mixture. A fair estimate of the pressure was afforded by the temperature in the interior of the cooled bulb, knowing the vapour pressures of ice. A narrow side hole, provided with an indiarubber tube and a screw-clip, was added, and through this air could be admitted so as to raise the pressure very slightly. The results obtained were very encouraging, and the next step was to make direct measurements of pressure by connecting the cryophorus with an air-pump and manometer ; and it after- wards occurred to us that the method might be used for liquids by covering the bulb of the thermometer with cotton-wool and admitting fresh liquid, as required, to moisten the cotton-wool by means of a vertical tube provided above with a stopcock (or indiarubber tube and clip) and reservoir, and drawn out sideways 74 SIR WILLIAM RAMSAY at the bottom into a jet impinging on the thermometer just above the wool. We found that this worked very well, and that in the case of water, benzene, etc., the liquid on the cotton- wool could be frozen, so that both boiling points and volatilising points could be determined with the same apparatus. [Phil. Trans. 175, 37 (1884).] In the case of water we used an apparatus with two vertical tubes provided with thermometers, etc., so that we could have ice on one thermometer and supercooled water on the other, the pressure being necessarily the same in both cases. We were thus enabled to verify Prof. James Thomson's theory of the vapour pressures of solid and liquid in the case of water, ben- zene, acetic acid and camphor. But to make the proof complete, it was advisable to ascertain definitely whether the statical (barometer tube) and dynamical (boiling or volatilising point) methods gave the same results. Accordingly determinations of vapour pressure were made with a barometer tube of a form specially adapted for the complete removal of air either dissolved in the liquid or adhering to the walls of the barometer tube. [Phil Trans. 175, 461 (1884), also Phil. Mag. 23, 61 (1887).] The barometer tube was heated by the vapour of a pure liquid boiling under known reduced pressures. From these pressures the temperatures were ascertained from tables of vapour pressure previously compiled. In order to have at our disposal a wide range of temperature, we required to know the vapour pressures of a series of stable liquids, easily obtainable in a pure state. The substances we adopted were carbon bisulphide, ethyl alcohol, chlorobenzene, bromobenzene, aniline, methyl salicylate, bromonaphthalene and mercury. [Trans. Chem. Soc. 47, 640 (1885).] Regnault had already determined the vapour pressures of carbon bisulphide, ethyl alcohol and mercury, and we accepted his values, though it was found subsequently that considerable corrections were required in the case of mercury. We had to THE BRISTOL PERIOD 75 determine the vapour pressures of the other substances ourselves, and for this purpose we employed our new method already described [see also Trans. Chem. Soc. 47, 42 (1885)], and we also made a few determinations with an air thermometer to obtain fixed air-temperature points on our scale. The pressures were plotted in each case against the temperature and were then read off for each degree over rather a wider range than that actually required. I undertook to smooth these pres- sures by the method of differences, and in doing this I noticed : (1) That in the case of chlorobenzene and bromobenzene the value of -JT-. T at any given pressure was the same for both substances, and that with the other substances, excepting per- haps ethyl alcohol, the values of -J* • T at any given pressure showed only moderate differences. I found also that the relative values were about the same whatever the pressure chosen. (2) The ratio of the absolute temperature of bromobenzene to that of chlorobenzene was the same at all pressures, taking always the same pressure for both substances, and I found after- wards that this is the case also for other pairs of chemically closely related substances; or R'=R, where R' is the ratio of the absolute temperatures at a pressure p' and R is the ratio at a pressure p. I had at this time secured a copy of Regnault's complete researches, and I made a thorough study of his determinations of vapour pressure and thus obtained confirmation of the above generalisations. In a joint paper, read before the British Associ- ation in 1885 at Aberdeen, Eamsay gave an account of the closely allied generalisation, = constant (approximate) at the same vi~vz pressure, and I described the above generalisations (1) and (2). For less closely related substances the simple relation R' =R does not usually hold, but I found the equation R' =R + c (tr - 1) 76 SIR WILLIAM RAMSAY to hold accurately, where c is a very small constant, and tr and t are the temperatures of one of the two substances at the two pressures p' and p. The first generalisation is closely connected with the formula of Clausius and Clapeyron, L =dp_T v: - v2 dt J ' Ramsay had previously studied the first term of the formula, — - — > chiefly at atmospheric pressure, and had communicated his results to the Chemical Section of the Philosophical Society of Glasgow in 1877, but the generalisation in the form — ^~ = constant at atmospheric pressure for different substances was first actually published by Trouton [Phil. Mag. 18, 54 (1884)], and is known as Trout on' s law. Finally these and another allied generalisation were published by us in a series of five papers termed ' Some Thermodynamical Relations/ Pts. I. to V., Phil Mag. 20, 515 (1885) ; 21, 33 and 135, 22 ; 32 and 37 (1886). I found that Regnault's vapour pressures of mercury below the boiling point, when compared with those of one of the other substances, gave results which did not agree with the formula R'=R+ c(tf -t), and on reading all his papers bearing on this subject I found that Regnault at an early date had made rough determinations of the vapour pressures of mercury below the boiling point and that, at a considerably later date, when he made his complete investigation over a wide range of temperature, he evidently forgot that his early experiments made no claim to great accuracy, and he adopted them without further verification. We therefore found it necessary to redetermine these vapour pressures, and we carried out experiments with special apparatus between 220° and the boiling point of sulphur. We employed the equation R'=R -fc(£'-t), taking water as the standard THE BRISTOL PERIOD 77 substance, for interpolation and for extrapolation below 220°, and we found that below this temperature Regnault's pressures were much too high and that the formula R' =R +c(t' -t) was applicable to our results between 220° and 440°, though not to Regnault's. [Trans. Chem. Soc. 49, 37 (1886).] The two generalisations were found not to be applicable, as a rule, to dissociating substances, nor, for a very wide range of pressure, to compounds containing a hydroxyl group, such as water, the alcohols and the fatty acids. For moderate ranges of pressure, however, the deviations are hardly noticeable in the case of the hydroxyl compounds, so that no serious harm has been done by choosing water as the standard substance. Landolt's vapour pressures of the lower fatty acids were also found to be inaccurate by means of the same formula and Dr. Arthur Richardson afterwards redetermined these pressures in the Bristol laboratory. I may mention that Regnault's boiling point of sulphur was subsequently found by Callendar and Griffiths to be too high, and the vapour pressures of mercury had therefore to be again corrected. [Young, Trans. Chem. Soc. 59, 629 (1891).] Ramsay accepted my recalculations. Our investigations of the vapour pressures and volatilising and boiling points of solids and liquids were extended to dis- sociating substances [' Evaporation and Dissociation/ Pt. I., Phil. Trans. 177, 71 (1886)], of which we examined a considerable number — chloral hydrate, butyl-chloral hydrate, chloral methyl- alcoholate chloral ethyl-alcoholate, ammonium carbamate, am- monium chloride, phthalic acid, succinic acid, aldehyde ammonia and nitrogen peroxide. A special form of apparatus was required for nitrogen peroxide on account of its action on mercury, and a special method of calculation for ammonium chloride which acts on mercury at high temperatures. Vapour density determina- tions were also carried out. In the case of nitrogen peroxide and ammonium chloride — 78 SIR WILLIAM RAMSAY and also acetic acid — the curves were of the usual form and the statical and dynamical methods gave the same (or with ammon- ium chloride nearly the same) results. With aldehyde ammonia both curves were of the usual form, but were quite distinct, the temperatures being much higher on the volatilising point curve. For the other substances the volatilising point curves and in some cases the vapour pressure curves were quite different in form, in fact with the chloral compounds and am- monium carbamate there was no simple relation between volati- lising point and pressure. A possible explanation of the peculiar form of some of the vapour pressure curves was given, and it was pointed out that the dissociating substances might be divided into two classes : (a) that including such substances as chloral hydrate, in which there is deep-seated chemical change on dis- sociation, and (b) that including nitrogen peroxide and acetic acid and, possibly, ammonium chloride, in which the chemical change is much simpler Our researches on vapour pressures, volatilising points and boiling points included also an investigation of bromine, iodine and iodine monochloride. [Trans. Chem. Soc. 49, 453 (1886).] A separate paper [Trans. Chem. Soc. 49, 685 (1886)] contained an account of determinations of the vapour densities of chloral ethyl-alcoholate at a series of temperatures and pressures. For this purpose a Hofmann's apparatus was modified in such a manner that pressure, volume and temperature could all be altered at will. The apparatus is described in the Phil. Trans. 178, 57 (1887). We were also led into a controversy with Kahl- baum, who contended that the statical and dynamical methods of determining vapour pressure gave different results. [Berichte, 1885, 2855 ; 1886, 69 and 2107.] Ramsay had already made determinations of the vapour pressures, specific volumes and critical constants of benzene and ether, a copper block being used for heating the substance. [Proc. Roy. Soc. 31, 194 (1880).] Ramsay arrived at the con- THE BKISTOL PEKIOD 79 elusion that the molecules of a liquid are more complex than those of the same substance in the gaseous state, and that even above the critical temperature there is a mixture of the two kinds of molecules. The method of heating must, however, have been unsatisfactory, for the observed critical temperature and pressure of benzene were far too high. (Observed 291*7° C. ; 60*3 to 60'5 atm., instead of 288'5°C., and 47 '9 atm.) The pressure does not appear to have been corrected for the deviation of air (in the manometer) from Boyle's law, but even when this correction is introduced the critical pressure is only lowered to 59 '2 to 59*4 atm, (It is possible, of course, that the benzene contained some more volatile impurity which would raise the critical pressure.) Ramsay invited me to join him in a continuation of these researches. He had employed a vapour bath in his work on specific volumes, the liquid in a small bulb being heated by the vapour of the same substance, boiling under atmospheric pressure. The method of heating in a vapour bath was found to be very satisfactory and was evidently capable of wide application. We decided to adopt it, making use of a series of pure liquids, as already mentioned, and altering the pressure, as required, to give a range of temperature for each substance. The experi- mental tube could now be placed in a vertical position and the reading of volume was thereby rendered easier and more accurate. The method of filling the experimental tube with liquid in such a manner as to expel the last traces of air was also improved, and curves were drawn from Amagat's data for the correction of pressure for the deviation of air from Boyle's law. It was perhaps unfortunate that, with the exception of ether, the substances we selected for investigation were hydroxyl compounds — alcohols, acetic acid and, later, water — for these substances are now known to behave abnormally in many respects. Still, the comparison of their properties with those of a large number of normal substances which I afterwards examined has 80 SIR WILLIAM RAMSAY led to interesting conclusions, and even at that time the results with acetic acid proved to be of considerable interest, especially as a comparison with the data obtained by Natanson with nitro- gen peroxide was possible. These two substances, acetic acid and nitrogen peroxide, .were found to behave so similarly as regards their vapour densities and, as our own results showed, as regards their vapour pressures and boiling points, that we felt entitled to conclude that the kind of dissociation they undergo must be very similar. The liquids investigated were methyl, ethyl and propyl alcohol, ether, acetic acid and water. The experimental work was carried out conjointly in Bristol in the case of methyl and ethyl alcohol, ether and acetic acid. The work on propyl alcohol had just been started when Ramsay was appointed Professor of Chemistry at University College, London, and I did the greater part of this work afterwards by myself in Bristol. I also carried out a number of experiments on the mixture of propyl alcohol and water of constant boiling point. The experiments with water were carried out by Ramsay in London, with the exception of those on the vapour densities under low pressures with the modified Hofmann's apparatus, which I made in Bristol. I may mention in passing that the experiments with propyl alcohol and water led us to the conclusion that the so-called " hydrate of propyl alcohol," described by Chancel, has no existence, and we read a paper on the subject before the Chemical Society in London. Our conclusions, however, were received with scepticism, and the paper was not published in the Trans- actions (Proc. Chem. Soc. 1888). Nine years later Thorpe (Trans. Chem. Soc. 71, 920) brought forward evidence against the existence of any of the four ' hydrates of isopropyl alcohol,' described by different observers. Finally, in 1902, a careful study of mixtures of the lower alcohols with water was carried out by Miss E. 0. Fortey and myself, and our results, taken in conjunction with those of Konowalow, afford strong evidence that no hydrate of THE BRISTOL PERIOD 81 any alcohol is formed, at any rate at temperatures above 0° C., and in the case of normal propyl alcohol even at - 40°. The most important results were those with ether, and with this substance, as also with acetic acid and some of the others, Ramsay and I made a large series of vapour density determina- tions under low pressures with the modified Hofmann's apparatus, to which reference has already been made. The experimental data for ether were published in the Trans. Roy. Soc. 178, 57 (1887), and the conclusions derived from the investigations as a whole were given in a series of papers : 1. In a letter to the Phil. Mag., June 1887, also Phil. Mag. 23, 129 (1887), we stated our belief that there is normally no distinction, as regards molecular aggregation, between liquid and vapour either above or below the critical temperature. Ramsay's original views on this matter, recently restated by Wroblewski, were thus abandoned, and we found no reason afterwards to change our opinion. [Acetic acid and dissociating substances generally are, of course, exceptional in this respect.] 2. Phil. Mag. 23, 435 ; 24, 196 (1887) ; also Proc. Roy. Soc. 42, 3 (1887). In these papers we announced the discovery that at constant volume the relation between pressure and tempera- ture in the case of ether, both as gas and liquid, is expressed by the simple formula, p=bT-a, where b and a are constants, depending on the volume. We gave the values of b and a for a large number of volumes. We also showed that the data obtained by Andrews for carbon dioxide are in agreement with this formula. Barus had independently come to the same conclusion as far as liquids are concerned. I afterwards found that for iso- and normal pentane the formula is very nearly but not quite true, except at very large volumes and at or near the critical volume. We also drew the theoretical portions of the isotherms in the region where liquid and vapour ordinarily coexist. We showed how the vapour pressure of a substance (liquid and vapour 82 SIR WILLIAM RAMSAY coexistent) could be ascertained from the theoretical isotherm (continuous passage from liquid to vapour), and we found that, near the critical temperature at any rate, the theoretical values for ether agreed remarkably well with those observed. Finally, a comparison of the isochors for nitrogen peroxide and acetic acid with those for ether indicated very clearly the changes N204 ^ 2N02 and (C2H402)2 ^ 2C2H402. The difference in behaviour between acetic acid and the other substances was also clearly shown by the curves representing : (a) The relation between the densities of saturated vapour and the temperature (or pressure) ; (b) The relation between the heats of vaporisation and the temperature. As regards the first relation, the density of the saturated vapour of ether (taking the density of hydrogen as unity) diminishes with fall of temperature until it becomes normal or very nearly so. This is true also for the alcohols, but the density of the saturated vapour of acetic acid reaches a minimum between 140° and 150°, increasing again at lower temperatures ; it was approaching the double value at the lowest temperature at which observations were made. The heats of vaporisation were calculated from the formula T dm T - =~r • -j- The values for ether, methyl alcohol and propyl alcohol were found to increase with fall of temperature and showed no sign of becoming constant. With acetic acid a maxi- mum was reached at about 110°, the heats of vaporisation falling steadily at lower temperatures. For ethyl alcohol no maximum was observed, although from 20° to 0° the values appear to remain practically constant. The behaviour of acetic acid was explained by us by the fact that there is molecular association both in the liquid state and in that of vapour : the rapid increase in the density of saturated vapour, due to association, at low temperatures accounts for the THE BRISTOL PERIOD 83 fall in the heat of vaporisation. There is no indication of such molecular association in the vapour of any of the alcohols. [Phil. Mag. 23, 129 (1887).] An investigation on similar lines of a mixture of ethyl alcohol and ether led to results of some interest, but a method of bringing about the thorough admixture of two liquids in a tube of narrow bore by means of an electromagnetic stirrer was afterwards devised by Kuenen, and his results are of far greater value and importance." In those days experimental scientific research received practically no encouragement at the hands of governing bodies. If a professor chose to engage in work of this kind, it would be done almost surreptitiously in such time as he could snatch from the lecturing and teaching which formed the whole of the official duties connected with his chair. The consequence of this state of opinion, supported as it was by the utterances of public men and the conservative attitude of the older British universities, has been until quite recent years almost total inactivity in regard to research and the higher instruction which is dependent on research in the majority of the universities and colleges in this country. Here and there a man of genius has appeared endowed with sufficient energy to enable him to push onward in spite of such obstacles. Kamsay was one of these, and the record of his work and example has contributed in no small degree toward promoting the change in public feeling in reference to research, which is now almost feverishly manifested. At Bristol in the early days of the College there were 84 SIK WILLIAM RAMSAY but few advanced students capable of taking part in research. Among these Miss K. I. Williams, whose death took place in January 1917, deserves to be mentioned. Ramsay suggested to her an investigation into the composition of various foodstuffs, cooked and uncooked, and this enquiry occupied her continued attention till the close of her life thirty-five years later. Her results have been collected into the form of a book, which it is expected will be published very soon. James Tudor Cundall, Colonel H. C. Reynolds, R.E., and Franklin P. Evans also worked at research under Ramsay's direction. The establishment of the University College brought in the persons of the professors a very welcome accession to the intellectual society of Clifton. Among Ramsay's colleagues were several men who afterwards reached great eminence in their several departments of science. His own immediate colleague, the Lecturer in Chemistry — Dr. Sydney Young — succeeded to the chair when he went to London and afterwards became Professor in the University of Dublin. The Professor of Physics was Silvanus P. Thompson whose fame as a popular lecturer rivalled that of Tyndall at the Royal Institution. A few years later he became Principal and Professor at the City and Guilds of London Technical College, Finsbury. Then there was W. J. Sollas as Professor of Geology and Zoology, now Professor of Geology in the University of Oxford. Engineering was repre- sented by H. S. Hele Shaw, who subsequently occupied THE BRISTOL PERIOD 85 a chair in the Liverpool University and served for some time as Principal of the University College in the Transvaal. Among the professors on the Arts side were Reginald Fanshaw from New College, Oxford, and James Rowley, Professor of Modern History and English Literature. The Bristol Medical School of far older foundation, though academically connected with the University College, held for many years a position of finan- cial independence. The names of Greig Smith and Edward Long Fox may be mentioned as of more than local reputation. Dr. John Beddoe, F.R.S., the well-known anthropologist, was also resident in Clifton at this time and is mentioned in several letters of Ramsay's. Throughout the early years of the new institution the friendly intercourse which existed between the members of the staff and the masters of Clifton College helped to give unity of aim in the higher education of Bristol and to keep touch with men from the older universities. Opportunities of close acquaintance with such men as T. E. Brown, the poet, with Sidney Irwin, W. A. Shen- stone, G. H. Wollaston and A. M. Worthington and others were much appreciated by Ramsay1 and his small 1 A letter (dated 17th March, 1884) of Ramsay's to his friend Bobbie contains the following passage referring to Worthington : "I sincerely hope that Worthington will be appointed. You will like each other very much. W. is a remarkably nice fellow — in fact an Israelite without guile — as all round as you could wish and really a distinguished physicist in his own line — capillary attraction. His papers have drawn a great deal of attraction — not capillary — at the R.S. and he is bringing out a 86 SIR WILLIAM EAMSAY staff. Through the members of the College Council also the advantage of intercourse with some of the leading men of business in Bristol was secured to the professorial staff. The great majority of the leading citizens had their residences on the high ground of Clifton and the neighbourhood of the Downs, and thus the best elements in the society of the place were brought by the physical circumstances of the locality near together. The social charm of Kamsay and his wife helped not a little to increase the friendliness pervading the place. A little Browning Society, which had been started by some of the masters at Clifton, afforded opportunities for meeting them and joining them in grappling with the obscurities of Paracelsus and Sordello. Longer lived and possessed of greater vitality was the Scientific Club, which arose out of a previously existing Society meeting at the Museum. Kamsay and Shenstone were the chief pro- moters of the Club, which met four or five times in the session, and after an informal dinner some member would speak rather than read a paper on any subject which he had made his own. One of these communica- tions from Ramsay was probably the paper " On Smell " printed in Nature for 1882. The Bristol Society of Naturalists, of which Ramsay was at one time President, book on the subject. He is one of my chums here, and I shall be very sorry if he goes. He is at present at Clifton College." This appears to refer to the Professorship of Physics at Bangor University College, for which, however, Worthington was not chosen. In 1887 he was appointed Professor in the Dockyard School, Portsmouth, and afterwards transferred to the Royal Naval Engineering College, Devonport and Greenwich. He died at the end of 1916. THE BRISTOL PERIOD 87 was the recipient of another paper of his " On Brownian or Pedetic Motion," a subject on which ten years later he communicated his more mature views to the Chemical Society (Clem. Soc. Proc. 1892, p. 17). Many years later, on the twenty-first anniversary of the foundation of the Club, Ramsay was present as a guest and spoke pleasantly and brightly of episodes in its early days. With that kindly twinkle of the eye which with him so often heralded some whimsical touch or paradox, he attributed such success as he had achieved to the great advantage of a bad memory for anything merely read or heard of, and the necessity, in his case, of actual contact with experimental evidence as the window through which the truths of science could alone be perceived. We have the testimony of one who was present on this and other occasions how cordially those who had known him as Principal of University College welcomed him back to Bristol, and a few years later how pleasant it was to join in the ovation given him when he received the Honorary Doctorate of the Uni- versity, which in large measure owes its existence to what he had done for education in Bristol a quarter of a century before the Charter was granted. In the early days of the College, writes Professor Lloyd Morgan, " degrees were only obtainable by sending our students to London University or some other external examining body. But what characterised much of the work of University College was academic teaching on what I regard, I hope without undue 88 SIR WILLIAM RAMSAY prejudice, as a remarkably high level specially adapted to those, and there were many such at that time, who valued the teaching for its own sake and quite independently of the hall-mark of a degree. I have frequently had occasion to refer to the notes I took of Professor Fanshawe's lectures on Spinoza, to a mere handful of keenly interested students. I question whether a better and more inspiring course of lectures on philosophy was given in any class-room in the United Kingdom. One realised in after-days in what high estimation such teaching was held and how the University College had been regarded as a centre of intellectual atmosphere, for example, if I may cite a case, by the gifted ladies who wrote under the name of ' Michael Field.' In a letter from Sidney Irwin of Clifton College he speaks of Rowley's lectures as bearing the academic stamp of distinction. In all departments such work was encouraged and enlisted Ramsay's sympathy. * Remember/ he said to me when he was called away to University College, London, ' we are working for the future. We are now a University College, but some day — I hope you may be here to see it — we shall have a University in Bristol. To this end a high level is necessary all round, in Arts no less than in Science/ It was partly through the spirit Ramsay helped to infuse into his colleagues that the prosecution of research was steadily encouraged." Ramsay frequently visited London either for the pur- pose of reading his papers before the Royal or the Chemical Society or in connection with social gatherings. On the 23rd of April, 1884, a dinner to Perkin, the dis- coverer of the first " aniline dye," was given in London under the chairmanship of Hofmann, who had come over from Berlin for the occasion. Many distinguished chemists were present, among them the famous Russian Mendeleeff, of whom the following account by Ramsay, THE BRISTOL PERIOD 89 in a letter to Dr. Blaikie, dated 4th May, 1884, is inter- esting and characteristic of both : " I was very early at the dinner and was putting off time, looking at the names of people to be present, when a peculiar foreigner, every hair of whose head acted in independence of every other, came up bowing. I said, ' We are to have a good attendance I think.' He said, ' I do not spik English.5 I said, ' Vielleicht sprechen Sie Deutsch ? ' He replied, ' Ja, ein wenig. Ich bin Mendeleeff.' I did not say, ' Ich bin Ramsay,' but ' Ich heisse Ramsay,' which was perhaps more modest. His method reminded me of ' the only Jones.' Well, we had twenty minutes or so before anyone else turned up and we talked our mutual subject fairly out. He is a nice sort of fellow, but his German is not perfect. He said he was raised in East Siberia and knew no Russian even till he was 17 years old. I suppose he is a Kalmuck, or one of these outlandish creatures." The origin and early history of University College, Bristol, and other provincial colleges was sketched very briefly at the beginning of the chapter. In a very few years from their foundation most of these colleges found themselves involved more or less in financial difficulties. Their very success was in many cases a source of embar- rassment, for not only was it necessary to replace appar- atus or fittings which had become obsolete and to provide libraries, but the increased number of students rendered necessary additional teaching assistance. Moreover, colleges which were dependent partly on annual dona- tions and subscriptions found that some of these were apt to silently vanish away, and so for one reason or another nearly all these colleges found themselves face 90 SIR WILLIAM RAMSAY to face with an annual deficit. This was the case at Bristol, and in the report of the Annual Meeting in November 1884 the treasurer announced that there was a balance on the wrong side of the account amounting to about £500 and that there was a prospect of similar deficiency in the following year. By the year 1885 the Council found it necessary to retrench, and in view of the difficulties Ramsay offered to allow a reduction in his salary as Principal. In the report presented on 17th November, 1886, it was announced that " The Council have had under consideration a proposal that Government should be memorialised for aid to Metro- politan and Provincial Colleges." The history of this movement is given briefly in the following pages. The course of events was followed by Professor Hicks, F.R.S., who, as the former Principal of Firth College, Sheffield, and subsequently Vice-Chancellor of that University, played a leading part in the work necessitated by an appeal for governmental assistance. To him the writer is indebted for many facts which were essential to a continuous record of events. In 1884 the British Association for the first time met outside the British Isles. Among the party returning from Montreal in the Peruvian were the late Professor J. Viriamu Jones, Principal of University College, Cardiff ; Professor W. Ramsay, Principal of University College, Bristol ; and Professor W. M. Hicks, Principal of Firth College, Sheffield. The Welsh colleges had recently obtained grants from Parliament of £4000 a THE BKISTOL PEKIOD 91 year each, and naturally the question of the financial position of their colleges was a subject of frequent discussion among the fellow-travellers on the Peruvian. By the end of the voyage it had been determined to bring the matter up at the first meeting of principals, which then arranged should be held in Cambridge during the ensuing Christmas vacation. In a letter to his father, dated 4th January. 1885, Ramsay thus described what took place : " I was at Cambridge yesterday and attended a dinner of the Principals of all colleges like ours. There were present (begin- ning from north and coming gradually south) Peterson of Dundee, Garnett of Newcastle, Kendall of Liverpool, Bodington of Leeds, Hicks of Sheffield, Jones of Cardiff, and myself. We had a very pleasant dinner and discussed common subjects with great interest till a very late hour. They put us all up in St. John's College. As I started the idea, they put me in the chair, but it wasn't the least formal, but quite social. The men are queerly divided, for three are professors of physics, two of classics, and myself a chemist, besides one of philosophy. We talk of having it yearly and I think it will be carried out." The question of Government aid was duly brought up but had a hike-warm reception from some of the chief provincial colleges and the matter dropped, but at the next meeting at Christmas, 1885, it was again discussed. In view, however, of the fact that the members included representatives from the three Welsh colleges who already received grants, and that the three important colleges at Manchester, Liverpool and Leeds held aloof, it was determined by the remainder to call a meeting 92 SIR WILLIAM KAMSAY of Principals of the English colleges especially for the purpose of considering the whole matter. This meeting was held on 10th April, 1886, at King's College, London. It was a small gathering of five, — Wace (King's College), Tilden (Birmingham), Kamsay (Bristol), Garnett (New- castle) and Hicks (Sheffield). Dr. Wace was voted to the chair. It was resolved " that it is desirable that steps be taken to obtain from the national exchequer such pecuniary assistance, particularly towards the en- dowment of chairs and contributions towards scholar- ships in the existing University Colleges of England as is already enjoyed by similar institutions in other parts of the United Kingdom." The persons present then formed themselves into a committee to obtain information regarding the finances, staff and students of the various colleges and appointed Professors Hicks and Ramsay to act as honorary secretaries and conveners. A second meeting was held on 17th June at King's College with the scheduled information before it. The practical outcome of this meeting was the drafting of a letter to be sent to the Councils of all the English colleges enquiring whether they would be disposed to join in an application to the Govern- ment for aid, and, if so, to appoint representatives to attend a meeting in London about October, at which the best means of bringing these views before the Government might be considered and definite steps agreed on. THE BEISTOL PERIOD 93 In response to this circular representatives were appointed from Birmingham, Bristol, University and King's Colleges, London, Newcastle, Nottingham, Shef- field and Southampton. Manchester, Liverpool and Leeds sent no representatives, and in fact took no part in the campaign until the end when victory was in sight. The proposed meeting of representatives was held on 6th November, 1886, again at King's College, with Dr. Wace in the chair. As it was felt that a stronger body of public opinion was required, the following resolution was adopted : "That it is desirable that public meetings be held at the several local centres with a view to a subsequent public meeting in London to be held during the next session of par- liament in support of government assistance in aid of higher education." The meeting definitely requested the governing bodies of the colleges taking part to engage in public action in support of the general principle. But it took some little time to organise and lay the train. A pamphlet was drawn up setting forth the chief facts, the aims of the colleges, their importance for the nation, the necessity for public assistance and specially drawing attention to the fact that while large grants were made to corre- sponding institutions in Scotland, Ireland and Wales not a single grant was given to the English colleges. Kamsay arranged with Dr. Jowett of Balliol and Sir Henry Roscoe to open the ball by letters to The Times and with the Times to back up these letters by a 94 SIR WILLIAM RAMSAY leader. On 13th February, 1887, Ramsay wrote to his mother: " We have been going on in our usual way, except for the excitement which I have been undergoing in getting people to promise to come to the meeting in favour of Govt. support, which is to be held here on March 2d. I have written to Mun- della asking him to come down. I have had a letter from him saying he would do what he could to help us. He can do a great deal. I am sending, with the appeal for state aid, an appeal to the Bristolians to help the college, on the ground that if they don't they won't see much of the Govt. grant when it comes. God helps those who help themselves. I am going to Bath to-morrow to get the Bath people to help us." Everything being ready the campaign, was opened on 3rd March, 1887, by a long and convincing letter from Dr. Jowett and a warmly supporting leader in The Times. The London evening papers of the same day joined in a favouring chorus, and next day the pro- vincial papers spread the cry all over the country. Roscoe's letter followed and Mundella asked Mr. Goschen (Chancellor of the Exchequer) whether he would assist in the introduction of a measure for granting pecuniary aid to the English colleges. A beginning was thus made and Mundella returned to the charge again on April 19th. Meantime several meetings had been held at Bristol on March 2nd, Southampton March 10th, Sheffield April 12th, and Birmingham May 26th. At Bristol Ramsay was of course present and gave an account of what had been accomplished at the College, the number of students and their subsequent careers. THE BEISTOL PERIOD 95 But he was busy in other ways, as shown by the following extract from a letter to his mother, dated 24th April, 1887: " You evidently think that I have been lodging in a den of bishops and such loose characters. Well, the actual fact is that I was asked to give an address on help to Univ. Colleges from Government at a meeting at Oxford last Thursday, to an assembly for promoting University Extension Lectures ; — i.e. lectures in all the bigger towns in England on History, Pol. Economy, etc., etc. So Jowett asked me to stay with him at Balliol on Wed- nesday night and Thursday. So thither I went on Wednesday and met — who do you think ? Terrible nobs. Imprimis, the Marquis of E-ipon, who was late Viceroy of India, and who, I daresay you remember, was objected to on the score of his being a Roman Catholic. He is a pursy little man very badly dressed, with a single eyeglass and a fussy manner ; none of the hauteur of the ' ancienne noblesse ' about him, but very chatty and affable. Next, the Lord Bishop of London, ' t Lond.' as he signs his name.1 He is rather a slow, black-a-vised man in apron and gaiters, but bless you, I am so used to Bishops now that they swarm about me that I pay no attention to their peculiar garb. The prelate's wife is like Mrs. Dods and the Bishop not unlike Marcus,2 but not so pleasant looking. Then, as if a Catholic peer and an Angli- can Bishop were not hotch-potchy enough, we had a real Jew, a Mr. Mocatta, who spoke feelingly of ' my people ' and their amis and needs. Minor lights were a Durham Canon and Canoness and a school inspector. My object, duty and pleasure was to convince these people that immediate help was needed for University Colleges, which I am glad to say I did. On 1 The Rev. Frederick Temple, previously headmaster of Rugby and afterwards Archbishop of Canterbury. 2 Minister in the Free Church of Scotland and afterwards Free Church Professor of New Testament Theology, Edinburgh. 96 SIE WILLIAM EAMSAY Wednesday eveg. we had an introductory meeting and on Thursday the Conference took place, followed by a lunch. I spoke at the Conference for about a quarter of an hour, I think pretty decently." At this time Ramsay was a candidate for the Chemistry Chair at University College, London, about to become vacant by reason of the retirement of Dr. Williamson. To this post Ramsay was appointed at the end of May. He did not, however, slacken his efforts in the cause of the colleges, but rather took advantage of the more frequent opportunities afforded by residence in London of meeting members of parliament and other influential people. The meeting in Birmingham held on 26th May, 1887, was presided over by the Mayor, Sir Thomas Martineau, and there was a very large attendance. Professor Tilden officiating as secretary read among many others a letter from Mr. Joseph Chamberlain expressing very deep sympathy with the movement. The first resolu- tion was moved by the famous nonconformist minister, the Rev. Dr. Dale, and seconded by Professor Tilden. One point which was brought out in the speeches was the fact that in consequence of the assistance given to the Welsh colleges they were able to reduce their fees to such a low figure that students from Birmingham were attracted away from the college in their own town. It was also shown that the annual deficit on the accounts of the college amounted to about £1500, which included about £500 paid in rates. The college at that time THE BKISTOL PERIOD 97 received no assistance from the municipality, notwith- standing the example of Nottingham, where the college was locally aided from this source. The letters, discussions and meetings had by this time brought the university question fully to the notice of the public. Consequently at a meeting of the repre- sentatives on 21st May, held at King's College, it was resolved (1) to ask Mr. Goschen to receive a deputation and (2) to ask Sir John Lubbock l to move a resolution in the House of Commons. The result was that Mr. Goschen consented to receive a deputation on 30th June. A very strong party of practically all the leading men interested in education outside the Government was got together, and constituted with the representatives of the colleges " a very formidable body," as Mr. Goschen said on receiving it. The deputation was introduced by Sir John Lubbock and the chief speakers were Mr. Chamberlain and Mr. Mundella, followed by Sir Lyon Playfair, Sir Bernard Samuelson, Mr. Burt, Professor Tilden, Dr. Percival and Sir George Young. Mr. Goschen, while stating that it would be impossible to deal with the matter by supplementary estimates that year, made it clear that he was interested and that the appeal had his sympathy. Ramsay, writing to his mother on llth May, 1887, and referring to what was going on, added : "I feel a little cocky about it, seeing I have engineered it all ; but perhaps it is too soon to be cocky yet till we have 1 Afterwards Lord Avebury. 98 SIR WILLIAM KAMSAY got the grant." On the 13th June he wrote again, after he had been appointed to University College, and in the course of the letter tells his mother that he has to be in London on the 29th to make final arrangements for the deputation to Mr. Goschen. But it was not till 9th March, 1889, that he was able to write to his mother : " Do you see that the Government Grant has come at last ? It is only £15,000 among all the colleges. It will be in the budget. I don't know how they will divide it, but I hope Bristol will get a good slice. Even £1000 a year would be an infinite relief to them. It would mean comparative affluence. I am also curious to know what our share will amount to." The communications had been all carried on through Ramsay, and a statement as to the constitution, revenue and students of the colleges concerned had been sent to Sir W. Hart Dyke at the Board of Education. On llth March, 1888, the National Association for the Promotion of Technical Education had sent a deputation to Viscount Cranbrook, Lord President of the Council, who received it sympathetically, but notwithstanding the favourable auspices nothing further was done that session. But early in February 1889 confidential information was received that a small grant was to be placed on the estimates, and a few days later a committee was appointed by the Treasury to enquire into the best way of apportioning the grant among the colleges. On 1st July, 1889, the Treasury practically adopted the recommendations of the committee and the battle was THE BEISTOL PERIOD 99 won. The grant was almost absurdly small, but a great point was gained in the recognition of the principle of state aid for the university colleges. The local prestige thus gained by the college was almost as important as the money value of the grant, and to obtain an increase appeared only a matter of time. In fact, before two years were over the agitation for an increase began. In this further movement Ramsay, though no longer Principal of a college, took a very active part, and the influence which he exerted throughout must be counted among his great services to science. The present position of the new universities, which have developed from the colleges, is a result of the recognition of the principles for which he fought. LIST OF PAPERS BY RAMSAY AND YOUNG. 1. Trans. Chem. Soc. 45, 88 (1884). The Decomposition of Ammonia by Heat. 2. Trans. Roy. Soc. 175, 37 (1884). The Influence of Pressure on the Temperature of Volatilisation of Solids. 3. Trans. Roy. Soc. 175, 461 (1884). Influence of Change of Condition from the Liquid to the Solid State on Vapour- pressure. 4. Trans. Chem. Soc. 47, 42 (1885). On a New Method of Determining the Vapour-pressures of Solids and Liquids, and on the Vapour Pressure of Acetic Acid. 5. Trans. Chem. Soc. 47, 640 (1885). A Method for obtaining Constant Temperatures. 6. Berichte, 18, 2855 (1885). Ueber die sogenannte " Speci- fische Remission von Kahlbaum." 100 SIB WILLIAM EAMSAY 7. Berichte, 19, 69 (1886). Ergeben die statische und die dynamische Methode der Dampfspannkrafts-messungen verschiedene Resultate ? 8. Berichte, 19, 2107 (1886). Ueber die statische und dyna- mische Methode der Dampfdruck-messungen. 9. Brit. Assoc. Report, 1885 (Aberdeen). Some Thermo- dynamical Belations. 10-14. Phil. Mag., Series V., 20, 515 (1885) ; 21, 33 and 135 ; 22, 32 and 37 (1886). Some Thermodynamical Relations. 15. Trans. Chem. Soc. 49, 37 (1886). On the Vapour-pressures of Mercury. 16. Trans. Chem. Soc. 49, 453 (1886). On the Vapour-pressures of Bromine and Iodine and on Iodine Monochloride. 17. Trans. Chem. Soc. 49, 685 (1886). Note on the Vapour Densities of Chloral Ethyl-alcoholate. 18. Journ. Soc. Chem. Industry, 5, 232 (1886). Decomposition of Chloroform at Red Heat. 19. Trans. Roy. Soc. 177, 71 (1886). On Evaporation and Dissociation, Pt. I. 20. Trans. Roy. Soc. 177, 123 (1886). On Evaporation and Dissociation, Pt. II. A Study of the Thermal Properties of Alcohol. 21. Trans. Roy. Soc. 178, 57 (1887). On Evaporation and Dissociation, Pt. III. A Study of the Thermal Properties of Ethyl Oxide. 22. Trans. Chem. Soc. 49, 790 (1886). On Evaporation and Dissociation, Pt. IV. A Study of the Thermal Properties of Acetic Acid. 23. Trans. Roy. Soc. 178, 313 (1887). On Evaporation and Dissociation, Pt. V. A Study of the Thermal Properties of Methyl Alcohol. 24. Phil. Mag., Series V., 23, 61 (1887). Influence of Change of Condition from the Liquid to the Solid State on Vapour- pressure. THE BRISTOL PERIOD 101 25. Phil. Mag., Series V., 23, 129 (1887). On the Nature of Liquids, as shown by a Study of the Thermal Properties of Stable and Dissociable Bodies. 26. Phil. Mag., Series V., 23, 547 (1887). On the Gaseous and Liquid States of Matter. 27. Proc. Eoy. Soc. 42, 3 (1887). Note on the Continuity of the Gaseous and Liquid States of Matter. 28 and 29. Phil. Mag., Series V., 23, 435 ; 24, 196. On Evapora- tion and Dissociation, Pt. VI. On the Continuous Transi- tion from the Liquid to the Gaseous State of Matter at all Temperatures. 30. Trans. Chem. Soc. 51, 755 (1887). On Evaporation and Dissociation, Pt. VII. A Study of the Thermal Properties of a Mixture of Ethyl Alcohol and Ethyl Oxide. 31. Zeitschr. fur physik. Chemie, 1, 237 (1887). Studien iiber Verdampfung und Dissociation. 32. Trans. Roy. Soc. 180, 137 (1889). On Evaporation and Dissociation, Pt. VIII. A Study of the Thermal Properties of Propyl Alcohol. 33. Proc. Chem. Soc. 1888. Note on the Mixture of Propyl Alcohol and Water of Constant Boiling-point. 34. Trans. Boy. Soc. 183, 107 (1892). On Some of the Properties of Water and of Steam. 35. Trans. Roy. Soc. 186, 257 (1895). On the Vapour-pressures of Argon. CHAPTEE IV UNIVERSITY COLLEGE, LONDON. 1887 TO 1894 IT is unnecessary in these pages to relate the history of the college and university to which, in 1887, Ramsay was called. But it is necessary to recall the fact that the chair of chemistry in University College had been occupied from the first by professors of the highest rank and of world-wide reputation. The first occupant of the chair was Edward Turner, F.R.S., the author of a work, The Elements of Chemistry, which in its day was regarded as authoritative. He died in 1837 and was succeeded by Thomas Graham. Graham's name is famous in the history of chemistry, for until quite recent times existing knowledge of gaseous and liquid diffusion and the phenomena connected with the ab- sorption of gases by colloids and by metals was derived entirely from Graham's experimental researches. Graham was the first President of the Chemical Society, which was founded in 1841. In 1855 his connection with the College came to an end, as he was appointed to succeed Sir John Herschel as Master of the Mint. But a few years earlier, while continuing his lectures, the practical 102 UNIVEKSITY COLLEGE, LONDON 103 chemistry instruction in the laboratory was relinquished by him and was placed under the direction of George Fownes, F.K.S., then Professor of Chemistry to the Pharmaceutical Society. Fownes did a good deal of interesting experimental research, but the work by which he was known to many generations of students was his familiar Manual of Chemistry, which in one volume provided all the instruction in physics, as well as inorganic and organic chemistry, which in those days was regarded as sufficient for the majority. Fownes died in 1849 and was succeeded by Alexander Williamson, who six years later was appointed to the chair of chemistry on the resignation of Graham. Williamson was known per- sonally to many of the present generation, and there are still among us a not inconsiderable numberof his students. Williamson, like Graham, was a philosophical chemist, whose mind was occupied with deep and broad views concerning the constitution of matter and the nature of chemical action. Williamson's most famous experi- mental research related to the constitution of the ethers and involved his favourite ideas concerning atomic movement. The theory of types has long since gone the way of all theories, but in its day the introduction of the water type by Williamson was an event of first- rate importance, which facilitated the classification of many compounds and reactions. It was immediately adopted into use by the most active of the contemporary chemists, of whom Gerhardt, Odling and Kekule were among the most distinguished. Williamson's influence 104 SIR WILLIAM RAMSAY as a teacher was considerable, but his activity in con- nection with the establishment of science degrees in the University, and in administrative work both within and without the College during the later years of his tenure of the chair, led to the practical abandonment of experimental research and the personal supervision of the laboratory instruction. One other name must be mentioned, that of Charles Graham, who, after working for a time as assistant under Williamson, was in 1878 appointed Professor of Chemical Technology in University College. He achieved a considerable reputation in connection with the science and technology of brewing and malting. He retired in 1889, and subsequently carried on for about ten years a private consulting practice chiefly in connection with fermentation industries. The chair to which Ramsay succeeded was therefore furnished with traditions. The successive occupants had always been among the leaders of scientific pro- gress, and the responsibilities connected with the post might have been ground for anxiety. But the new professor had already won his spurs, and was confident in his own powers. Almost immediately after entering on his new duties (in 1888) he was chosen one of the fifteen for the F.R.S. We shall see later how the anticipations of his friends were fulfilled, though no one could have expected the discoveries which followed so rapidly a few years later. Work at University College was begun under peculiar UNIVERSITY COLLEGE, LONDON 105 and somewhat disagreeable circumstances, for Ramsay found in the laboratories the accumulated residues of forty years. Professor Williamson seems never to have allowed anything to be thrown away, and the remains of, for example, the preparation of chlorine had been stored in dozens of jars and bottles with what object no one can now explain. There were also hundreds of paper packages covered with dust and without labels, all of which, amounting to several cart-loads, had to be, examined and cleared away by the new professor and the new assistant whom he had invited to join him.1 The students were chiefly medical, and very large classes were preparing for the examination of the Con- joint Board. In the general laboratory there were only about half-a-dozen, but there was another labora- tory, the Birkbeck Laboratory 2 for Chemical Techno- logy, occupied by Dr. Graham. This occupation, how- ever, came to an end two years later when Dr. Graham retired and the laboratory was then devoted to the use of pathology and botany. Mr. Watson Smith was then appointed to succeed Graham, merely as Lecturer in Chemical Technology. This lectureship was abolished in 1894. 1 J. Norman Collie had been engaged in teaching chemistry at the Ladies College, Cheltenham. He came up to University College in October 1887, and, with the exception of six years (from 1896 to 1902) as Professor to the Pharmaceutical Society, he has remained ever since. Since 190£ Dr. Collie has been University Professor of Organic Chemistry. 2 Founded in memory of Dr. Birkbeck. 106 SIR WILLIAM KAMSAY When Ramsay first came to University College the number of lectures to be given was very great, as women, medical students and others had separate lecture courses, and consequently the same preliminary lectures had to be given three times over in the session. At this time the Assistant Professor of Chemistry (apart from Tech- nology) was Dr. Richard T. Plimpton. Ramsay was fortunate in having such a man as Dr. Plimpton as chief assistant when he first came. Plimpton was a first-rate teacher, and many of the students of those early days owe a great debt to him for the excellent grounding he gave them in analytical chemistry.1 After Ramsay's first session at University College the women students, for whom separate instruction in chemistry had previously been given, were admitted to the same lectures as the men. This was quite in accord- ance with Ramsay's views about the position of women in relation to science. And a few years later, when a somewhat acute controversy arose in the Chemical Society on the subject of admitting women, Ramsay was of the party which would have opened the door to women as well as men on precisely equal terms. The two assistants at University College in 1887 were Dr. Samuel Rideal and Dr. J. N. Collie. An additional assistant was not appointed till 1891, when Mr. C. F. Baker, B.Sc., was chosen. He was succeeded in 1892 by Mr. H. W. Picton, B.Sc., and both were replaced 1 In 1894 Plimpton was appointed Lecturer on Chemistry at the Middle- sex Hospital Medical School. He died suddenly on 21st December, 1899. UNIVEESITY COLLEGE, LONDON 107 the following year by Dr. James Walker and Mr. Alex- ander Kellas, B.Sc. In 1894 Mr. Morris Travers became assistant in place of Dr. Walker. In the early days Ramsay was perpetually in the general laboratory and knew all about every student there. Often while talking to a student he would suggest to him to make experiments for himself in order to solve difficulties. This was not always acceptable to the assistants who, with the fear of the examinations before their eyes, were anxious for the students to stick to their systematic work. Ramsay always encouraged students to practice glass-blowing as much as possible. One learned professor, coming into the laboratory, remarked to Ramsay, " Do you allow your students to waste their time over that sort of thing ? It can be done far better by the professional glass-blower." Ramsay was very popular with the students. Every year, at the end of the first term, a dinner was arranged by the laboratory students and the practice has been kept up ever since. At these dinners Ramsay was the moving spirit, making speeches, singing songs, whistling and joking with everyone. Students, after leaving, often came back to these gatherings whenever they had a chance, and at the last dinner before the war there were present men who had left University College as much as twenty-five years previously. As soon as laboratories for instruction in practical chemistry were erected, the methods of instruction to be employed had to be considered and reduced to some 108 SIR WILLIAM RAMSAY kind of system. The first laboratory opened for this purpose was at Bloomsbury Square on the premises still occupied by the Pharmaceutical Society. Almost immediately after this, in 1845, the Royal College of Chemistry was founded and A. W. Hofmann was the first professor. At the former institution the first operations in which the student was engaged consisted in preparing and crystallising a number of metallic salts and other compounds. In a few weeks or months he was instructed in qualitative and simple quantitative analysis. At the College of Chemistry, on the other hand, the whole of the first year was occupied with qualitative analysis. The second year was devoted to quantitative analysis and the student was then allowed for the first time to engage in making preparations, which business was always associated with some kind of research. This was the order usually adopted in the great majority of laboratories on the continent as well as in this country during the next thirty years or more, and was probably the system practically at work in the chemical laboratories at University College when Wil- liamson resigned and Ramsay succeeded him. Other teachers have advocated the introduction of the student to methods of research from the outset, but as science has progressed very far since the middle of the nineteenth century there are not only the transformations and extensions of theory to be considered, but the material, apparatus and methods used in the modern laboratory are far more complicated than those of fifty years ago. UNIVERSITY COLLEGE, LONDON 109 Hence if a student is engaged too soon in attempts to find out some new thing, he is perpetually finding obstacles in the way of progress owing to want of knowledge or of skill. As to the degree of preparation necessary for success in research, there will always be some difference of opinion. Ramsay was face to face with the necessity for deter- mining on the method he would use in the teaching of chemistry so soon as he obtained his first independent appointment and that was at Bristol in 1880. The method he contrived was set forth in a little book, published in 1884, under the title Experimental Proofs of Chemical Theory for Beginners. The following ex- tracts from the Preface sufficiently describe its scope and object: " The experiments described in this little book have formed the preliminary work of all students beginning chemistry in my laboratory for the last two years. I am convinced that such a course has the advantage of familiarising the student with the subjects treated in the first term of an ordinary course of lectures ; of giving him practice in the construction of apparatus ; and of making him perform calculations with a definite object, instead of as merely theoretical problems. I have not found any difficulty in getting students to construct their own apparatus ; after a few preliminary lessons in cork- boring, bending glass tubes, etc., the demonstrator is put to little trouble. . . . The accuracy of the results obtained by these comparatively rough methods is surprising ; the density of gases is found usually within three of four per cent, of the truth ; and results of analysis seldom show an error of one per cent. Of course good results are obtained only by careful workers, 110 SIR WILLIAM RAMSAY and I make it a rule that each experiment shall be repeated until a satisfactory result is obtained. The whole course occupies a term of ten weeks, the student working three whole days a week." Longer experience, however, does not appear to have confirmed the efficacy of this system, for on commencing work at University College, London, the book fell into disuse. We have it on the evidence of one of his students at this time, Mr. E. C. C. Baly, who remained at the College for twenty-two years and became one of the assistant professors, that the students were " thoroughly grounded in qualitative analysis first of all, and this was followed by an admirable course in quantitative work." " Eamsay was a strong believer in the value of analysis, qualitative and quantitative as a method of training. He gave the proofs of theory in lectures which were very remarkable for their wealth of experiments, well conceived and admirably discussed." The days when the habits and manners of Mr. Bob Sawyer represented those of medical students in general have long since passed away. But down to a very late period in the nineteenth century disorder was rather prevalent in many classes of medical students, especially in connection with purely scientific subjects such as chemistry. While this was in some cases due to want of firmness on the part of the teachers, it was chiefly attri- butable to the laxity of the several medical examination Boards in reference to chemistry. When Eamsay came to University College the general chemical lectures were UNIVERSITY COLLEGE, LONDON 111 the scene of the usual " bear-garden." By the end of the first term, however, he reduced the class to order and never afterwards had further trouble. With regard to the purely chemical students Ramsay was always anxious to encourage original investigation and in many cases allowed them to enter on research before they had secured the Bachelor degree. This naturally interfered with their general reading, and as candidates at the degree examination they sometimes did badly. But the following extract from a letter to Professor Worthington, dated 12th November, 1888, shows what was Ramsay's own state of mind : " My classes are in good order and work well. I am therefore happy so far as they go. We have just had five men through the B.Sc. Of these four are going in for honours next week, and when they have been sufficiently tortured, they will begin research. So now we are in a fair way to get a ' school.' " This letter was dated from " 12 Arundel Gardens, W.," which was to be the home of the Ramsays, with their two children, for some fifteen years. The following year Worthington was Professor of Physics in the Royal Naval Engineering College, Devon- port, and negotiations were started with the object of joint holiday arrangements between the two families. On 30th June, 1889, Ramsay wrote : " The order of nature should have been so adjusted that our holidays might fall contemporaneously. You must get them to alter. Ours are like the holidays of the Medes and Persians. By 112 SIR WILLIAM RAMSAY the way, did the Ancients ever have holidays ? I imagine not. I think they merely took things easier all round. Anyhow I am now an instructor of medical youth, and so have to keep their terms, which means that I go on till July 20th and then stop till October 1st, when I again repeat the wondrous tale. They are an unsatisfactory style of people, having regard to their exams, more than their instruction. It is as if one paid more attention to the ejecta than the injecta ; as if all the pleasure were in having a tooth drawn not in making use of a sound molar. However, our nation is being radically corrupted. The natural mind is enmity against wisdom, knowledge and all instruction. It occurs to me that I quote in a mangled form from Proverbs. It might not be a bad thing to begin one's lectures with a few homilies on the sayings of Solomon. He was pretty well up in human nature, that old wiseacre, and has left on record many quaint and pithy sayings mrginibus puerisque. . . . What are your results with the breaking strain of liquids ? I have just got rid of the molecular weights of metals and am glad to be done with it. I am now preparing for an onslaught on vacua and am having my private-room fitted up as a laboratory." The research mentioned was embodied in a paper on " The Molecular Weights of the Metals," published in the Transactions of the Chemical Society for 1889 (p. 521). The method adopted was the estimation of the depression of the vapour pressure of mercury by dissolution in it of a known quantity of the metal. The results obtained led to the somewhat unexpected conclusion that in solution as a rule the molecules of metals are composed of single atoms. This, however, agrees with the usual view as to the constitution of those metals of which the vapour densities have been determined, namely UNIVEESITY COLLEGE, LONDON 113 mercury, cadmium and zinc, and these are all un- doubtedly monatomic. Before leaving Bristol Ramsay had occupied himself in conjunction with Mr. J. Tudor Cundall with a study of the oxides of nitrogen, and more particularly with the singularly elusive substance supposed to consist of the trioxide. Apart from the desirability of ascer- taining definitely the physical and chemical properties of both the peroxide and the trioxide the part played by the gaseous oxides of nitrogen in the reactions which go on in the production of sulphuric acid in the lead chamber was and is still sufficiently mysterious to render further research very desirable. The first paper by Ramsay and Cundall is in the Transactions of ike Chemical Society for 1885 (p. 187). It seems chiefly to bring out the fact that the blue or green liquids supposed to contain the trioxide consist of mixtures of N204 and N203 both in a partially dissociated state and that the passage of nitric oxide, NO, into this liquid fails to con- vert it wholly into N203, while the addition of excess of oxygen similarly fails to convert it completely into the peroxide. This communication elicited two papers from Dr. G. Lunge, whose great experience in the manufacture of sulphuric acid entitles an expression of his views to respect. In these papers he endeavoured to prove by argument and by some experiments that nitrous an- hydride, that is nitrogen trioxide, is capable of existing in the gaseous state. In a second paper (p. 672 in the 114 SIR WILLIAM EAMSAY same volume) Ramsay and Cundall proved by ingenious experiments that gaseous nitric peroxide does not com- bine at ordinary temperatures with nitric oxide, also that the density of the gas produced when blue liquid nitrogen trioxide is allowed to evaporate was found to be 22 '35 at ordinary atmospheric conditions. This corresponds to the calculated density of a mixture of N02 and N204 with NO and renders the assumption of the presence of N203 highly improbable. Ramsay returned to the question three years later. The method of estimating molecular weights by obser- ving the depression of the freezing point introduced by Professor Raoult of Grenoble had recently attracted deservedly increased attention. In a paper in the Transactions of the Chemical Society for 1888 (p. 621) Ramsay showed by this method, using acetic acid as the solvent, that nitric peroxide in the liquid state is represented by the formula N204. The trioxide was found to be unmanageable owing to its instability. But Ramsay took up the question again, and another paper appears in the Transactions for 1890 (p. 590), in which a fuller account is given of both these oxides of nitrogen, and the probability that the trioxide in the liquid state is correctly expressed by N203 is con- verted into certainty. It appears to undergo dissocia- tion to some extent even at — 90®. With regard to a mixture of the oxides of nitrogen in the gaseous state it seemb to have been shown by Dixon and Peterkin some years later that a small quantity of N2O3 may exist in UNIVERSITY COLLEGE, LONDON 115 such a mixture in an undissociated condition (Trans- actions Chem. Soc. 1899, p. 613). This is quite consistent with the results of Ramsay and Cundall. In 1890 the British Association met at Leeds, and the proceedings of the Chemical Section were enriched by a discussion in which the supporters of the older views as to the nature of solutions and of the newer doctrines were both present and took part. The reader may be reminded that up to quite recent times the nature of the process involved, when a soluble substance such as common salt or sugar dissolves in water, had not been studied systematically and it had been very generally assumed that when a solid substance dissolves in a liquid a weak kind of chemical combina- tion occurs between the solid and the liquid. This was usually referred to broadly as the hydrate theory of solution, and there can be no doubt of the existence of many hydrates in salt solutions and of compounds of the solute in the solvent in other cases in which liquids other than water are concerned. But the electrolytic and other properties of solutions cannot be accounted for by the hydrate theory, and it was not till 1887 that the new view of the constitution of solutions was intro- duced, by which many difficulties were explained. In that year the Dutch Professor Van't Hoff published in the Zeitschrift fur physikalische Chemie a theory based on the analogy between the state of substances when in solution and the same when in the state of gas. The dissolved substance exercises a pressure, called osmotic 116 SIE WILLIAM KAMSAY pressure, which leads to the assumption that the mole- cules of the dissolved substance subsist in the liquid in the same number in unit volume and exert the same pressure as they would if they were capable of assuming the state of gas at the same temperature. This paper was immediately afterwards translated by Ramsay and pub- lished in the Philosophical Magazine. This theory of Van't HofFs was found not to be equally applicable to substances like common sugar on the one hand, and on the other to salts and compounds of saline constitution, such as acids, all of which are electrolytes. And the next step was represented by the hypothesis of Arrhenius, published in 1888, as to the dissociation of such com- pounds into their chemically interchangeable parts or ions. This hypothesis to the supporters of the older doctrine seemed to be contrary to fact and common sense. It may readily be imagined therefore with what animation the discussion proceeded in the joint meetings of Sections A and B. A report of the several speeches was published in the Chemical News and in the Abstracts issued by the Chemical Society, But as so often remarked, the discussions which take place in public on such occasions are often equalled or surpassed in practical effect by the more intimate and informal talk which goes on over the dinner-table or perhaps in the garden or over a pipe at night. One such sym- posium occurred at Leeds in the house of Professor Smithells, who has kindly supplied the following note recording his recollections of what took place : UNIVEKSITY COLLEGE, LONDON 117 " The Leeds Meeting of the British Association in 1890 is memorable as marking the first Ionic invasion of England in the persons of van't Hoff and Ostwald. It was, of course, in the early days of the ionic theory of solution and I remember Ostwald remarking that the united ages of him- self, van't Hoff and Arrhenius were then less than a hundred years. Ramsay and Ostwald met for the first time as fellow-guests in my house, which became accordingly a sort of cyclonic centre of the polemical storm that raged during the whole week. No meeting within my experience has more fully illustrated the fact that the most interesting and stimulating proceedings of the British Association are those which occur outside the section rooms. The discussion was, as I have said, incessant. I remember conducting a party to Fountains Abbey on the Saturday and hearing nothing but talk of the ionic theory amid the beauties of Studley Royal. The climax, however, was reached the next day — Sunday. The discussion began at luncheon when Fitz- gerald raised the question of the molecular integrity of the salt in the soup and walked round the table with a diagram to con- found van't Hoff and Ostwald. After luncheon the party adjourned to the garden and was gradually increased by the arrival of strolling philosophers until it assumed quite large proportions. I regret that at this distance of time I cannot recall the names, but I believe it included, in addition to Ramsay and those named, Lodge, Armstrong, Pickering, Otto Pettersson, and there were others. The discussion continued throughout the afternoon with alternating vehemence and hilarity. I have a particular recol- lection of Fitzgerald walking restlessly about with his hand clasped on his brow and declaring in his rich Irish brogue, ' I can't see where the energy comes from.' Ramsay, as you can imagine, was no silent spectator. Being a convinced ionist, he was eager in helping out the expositions of Ostwald, whose 118 SIR WILLIAM RAMSAY English at that time was imperfect and explosive, and his wit and humour played over the whole proceedings. I wish I could do more justice to him and to the occasion. I believe it effected a good deal towards forming friendships, promoting good will and removing misunderstandings, and certainly it was the begin- ning of relations of great mutual sympathy and regard between Ramsay and Ostwald, which lasted till they were divided by their respective national sympathies at the unhappy outbreak of war." So long as nearly forty years ago the subject of Brownian or pedetic motion attracted Ramsay's notice, and in 1882 he communicated to the Bristol Society of Naturalists a short paper on the subject. This curious phenomenon was first described by the botanist Robert Brown (b. 1773 — d. 1858) in the course of his observa- tions on the pollen of plants and was at first attributed to life in the moving mass. When a muddy solution or an emulsion like milk is examined under the micro- scope the suspended particles, if small enough, are seen to be in motion constantly but irregularly both as to direction and speed. The motion is not related to the composition of the particles, but only to their size and specific gravity and the nature of the liquid. The motion cannot be attributed to currents in the liquid, for no two particles move in the same direction or with the same velocity. In 1892 Ramsay brought the sub- ject before the Chemical Society. By this time some important experimental work had been done especially by Messrs. Linder and Pic ton at University College, who had shown that they are apparently charged UNIVEESITY COLLEGE, LONDON 119 electrically, for they are attracted or repelled, according to their nature, from one or other of the electrodes con- verging a current into the liquid in which the particles are suspended. During the twenty-five years which have elapsed since 1892 much has been done by various observers and especially by Professor Jean Perrin of the Sorbonne. and it is now pretty generally the custom to attribute these movements to the motion of the molecules of the liquid in which the particles are sus- pended. In 1 882 Ramsay, in considering this hypothesis, appeared to think that single molecules could have no effect on masses so many million times larger than them- selves, as the moving particles are, and that to produce an effect many molecules must coalesce and move as a whole. In 1892 he seems to have retained practically the same view and supposed that the effect of adding an electrolyte to a liquid in stopping pedesis is due to the breaking up of these molecular aggregates by the presence of ions. From the first, on coming to London, Kamsay busied himself with the idea of a Teaching University for London, and to his exertions some of the changes which were afterwards introduced into the method of conducting the examinations of the Univer- sity, so as to give the teachers a larger share in determining the places of the candidates, were doubt- less in part due. On June 8th and 9th, 1892, two articles from his pen were printed in The Times under the heading " Universities Abroad," and from 120 SIR WILLIAM RAMSAY these the following introductory remarks may be quoted here : " The last 10 or 15 years have witnessed great changes in the attitude of the English people towards education. Elementary education has been made first compulsory, then free ; the endowments and efficiency of grammar schools have been sub- jected to close scrutiny ; it has been decided that a sum of no less than £538,600 shall be yearly spent on technical instruction in England alone ; local University colleges have sprung up in almost all the large cities of the kingdom ; three of these — Owens College (of older foundation), University College, Liverpool, and the Yorkshire College of Science, Leeds — have acquired status as the Victoria University ; a sum of £15,000 a year is granted by Government for the partial maintenance of the metropolitan and local colleges, with prospect of material increase at no distant date ; a Royal Commission has recently issued recommendations involving a radical change in the con- stitution of the Scottish Universities ; and lastly, and latest in order of events, a scheme has been approved by the Privy Coun- cil for the establishment of a Teaching University in London. The ' Gresham Charter,' however, having failed to command the concurrence of the House of Commons, a New Royal Com- mission is at present deliberating on the best means of uniting under one head the institutions in London which give education of University standard. In other European countries there is at present no such educa- tional turmoil. The systems of primary and secondary education have long ago been elaborated ; and the Universities pursue the smooth paths of increasing knowledge by research and by the training of students. Recent correspondence and articles which have appeared in the public Press show that there are in England many concep- tions of what a University should be. Many of the writers appear to consider a college as necessarily a hall of residence, UNIVERSITY COLLEGE, LONDON 121 as in Oxford or Cambridge ; many suppose the primary function of a University to consist in bestowing degrees after a certain course of study ; while others advocate the claims of a ' Univer- sity for the People/ where weekly evening lectures should lead to recognition of the students as eligible for an associateship or for a degree. There are yet others who imply that the function of a University consists in examination only, and who uphold the University of London as an ideal institution. In this state of public opinion it is well to cast our eyes abroad, and to enquire what conception of a University is held by the nations of the Continent. Before beginning an experiment it is advisable to study the literature of the subject, for thus only can errors be avoided and a reasonable prospect of a successful issue secured. This is the invariable prelude in these days to all scientific inquiry, and surely the most important of all is — How can knowledge best be increased ? " Ramsay was less interested in questions relating to University organisation and government than in the regulations under which degrees are obtained. These are the questions which affect most directly the system of teaching and which have probably had as much to do with the tendency on the part of English and Ameri- can students to seek admission to continental univer- sities as the eminent reputation of the professors in the majority of these institutions. Though these articles were written twenty-five years ago they still represent the constitution and operation of the universities referred to in all respects which may be regarded as fundamental, though in some details there have been modifications. The continental universities agree in their conditions 122 SIR WILLIAM RAMSAY for granting degrees in several points, in which, they differ from English universities generally. \ Thus the preparation of a Thesis or Dissertation is the essential qualification for a degree and is not replaceable by any examination or series of examinations. The thesis embodies the results of work done by the candi- date and always professes to be based on research, experimental, historical or literary, etc. As a matter of practice the subject is always selected, or at least approved, by the professor under whose direction the student works. After the dissertation has been pre- sented and accepted by the Faculty, an examination, sometimes written but usually oral, follows on the subject of the dissertation and other subjects cognate to it. The examiners are the teachers of the candidate associated with other members of the Faculty. Something of this kind was what Ramsay desired to see introduced generally into the universities of this country. " How can knowledge best be increased ? " was the question ever before his mind, and in his own ardour for research into the unknown he seems to have attached less importance to those other functions of universities which are connected with preparation for professions and for the everyday life of the world. Pro- bably his view would have been that initiation into the methods of scientific research is the best preparation for successful investigation of the problems which come before the physician, the engineer, the agriculturist, the teacher, the man of business no less than the man who UNIVERSITY COLLEGE, LONDON 123 takes up natural science as a pursuit to be followed through a lifetime. And his distrust of examinations and their results as a means of discovering capacity or rewarding merit often brought him into conflict with those who rely more confidently on the utility of examin- ations as an educational instrument. This is a large question of far-reaching importance upon which unani- mity can never be expected. Even in Germany there is great difference of opinion among the professors in the universities as to the desirability of increasing the number and the stringency of examinations leading to the doctor's degree.1 Men of genius like Ramsay are apt to forget, if they become teachers, that the average quality of mind among students is very different from their own, and attempts to apply indiscriminately methods which appeal to their own mental activity and resource are certain to meet with disappointment in the great majority of cases. It is, in fact, too often forgotten not only by teachers but by parents and others that though a natural faculty may be improved by education, it can never be created by any process in those cases where the natural faculty does not already exist. Poets, mathematicians, researchers are born, not made, and all that education can do in any case is to educe, train and strengthen qualities already existent which might otherwise run to waste and produce merely mischief. Bailey Saunders, Notes addressed to the U.L. Commissioners, Jan. 1899. CHAPTER V THE GASES OF THE ATMOSPHERE THE last twenty years of the nineteenth century wit- nessed two discoveries in physical science, namely the observation of X rays and the isolation of the argon series of gases, which equal, if they do not surpass, in significance and interest the discoveries of any previous period. Of the two the latter must be regarded as the most surprising, because it was not only unexpected, but the existing evidence would have appeared con- clusive against the possibility of such a discovery as that of a new unheard-of constituent of our atmosphere. It is, however, an interesting illustration of a statement made by Lord Kelvin in his Presidential Address to the British Association in 1871 : " Accurate and minute measurement seems to the non-scientific imagination a less lofty and dignified work than looking for something new. But nearly all the grandest discoveries of science have been but the rewards of accurate measurement and patient long-continued labour in the minute sifting of numerical results." For the discovery originated in the laborious and accurate determination by Lord Ray 124 THE GASES OF THE ATMOSPHEEE 125 leigh of the relative densities of the principal gases, an investigation which extended over some twelve years, commencing in 1882. In that year Rayleigh had called .attention to the statement which had so long passed under the name of Front's Law. According to this statement the atomic weights and hence the densities ! of the simple gases stand in a simple numerical relation- ship to the atomic weight and density of hydrogen. The ' first result of this investigation was the demonstration that the atomic weight of oxygen is approximately 15*8 and therefore less than the whole number 16 required by Prout's "law," which was thus shown to be illusory. Unexpected difficulties were encountered in dealing with nitrogen gas, but the upshot of the numerous experiments undertaken was the discovery that the gas left when oxygen, water vapour and carbon dioxide were completely removed from atmospheric air was appreciably heavier than nitrogen prepared from am- monia by passing a mixture of this gas with air or oxygen over a surface of heated copper. With reference to this anomaly Lord Rayleigh addressed a letter to Nature on 29th Sept., 1892, in which the following passage occurs : " I am much puzzled by some recent results as to the density of nitrogen and shall be obliged if any of your chemical readers -can offer suggestions as to the cause. According to two methods of preparation I obtain quite distinct values. The relative xlifference, amounting to about TT5Vfr part, is small in itself; but it lies entirely outside the errors of experiment, and can only be ^attributed to a variation in the character of the gas." 126 SIR WILLIAM RAMSAY The ammonia method of preparation had been sug- gested to him by Professor Ramsay. A paper on the subject, under the title " An Anomaly encountered in the Determinations of the Density of Nitrogen Gas," by Lord Rayleigh, was published in the Proceedings of the Royal Society in April 1894. In this paper the author discussed the difficult question as to the possible impurities in atmospheric nitrogen which would account for its apparent greater density, and, on the other hand, the impurities lighter than nitrogen which conceivably might be present in the gas derived from chemical sources. As to the gas obtained from air it was shown con- clusively that the superior density could not be attri- buted to the presence of unabsorbed oxygen. Of the gases lighter than nitrogen the presence of water vapour or ammonia could be dismissed from consideration at once, in view of the conditions under which the experiments were conducted. The only gas which required special attention was hydrogen, but this and such light hydrocarbons as marsh gas would be removed by the hot copper oxide over which the gas is made to travel. An experiment in which hydrogen was purposely introduced proved in fact that it was com- pletely burnt out by this treatment. Other experiments followed in which nitrogen obtained by removing oxygen from the oxides of nitrogen by means of heated iron was compared with nitrogen derived from air by the absorption of oxygen by means THE GASES OF THE ATMOSPHERE 127 of hot iron or in the cold by means of ferrous hydrate. The same difference of density was again observed. Storage of the chemically prepared nitrogen for many months or exposing it to the effect of the silent electric discharge produced no effect on the density of chemical nitrogen and the hypothesis that such nitrogen might be in a condition in which some of its molecules, N2, were dissociated into atoms had to be abandoned. Early in 1894 the position was therefore as follows : it had been abundantly proved that nitrogen derived from the air by absorption and removal of the other known constituents of air is heavier by about ^^ than nitrogen obtained by the decomposition of chemical compounds. It had also been shown that the apparent lightness of the latter was not due to the presence of lighter impurities nor to dissociation. The only pos- sible hypothesis remaining was that atmospheric nitrogen was mixed with a small quantity of a heavier gas, the nature of which was unknown. , About this time Lord Rayleigh's attention was drawn 1 to the work of Cavendish described -in his " Experiments on Air " in the Philosophical Transactions for 1785. By 1 In a lecture on Argon at the Royal Infirmary in 1895 Lord Rayleigh mentions that he derived this suggestion from Professor Dewar. On the other hand, a letter from Eamsay to Lord Eayleigh (28th November, 1898), reminds the latter that he had suggested Cavendish " at an early date before 1894 — certainly before our conversation at which I asked your permission to look into atmospheric nitrogen." He also possessed a copy of Cavendish's paper with a marginal note, "Look into this," written probably about 1896. The point is not of great importance as to who suggested Cavendish ; that Lord Eayleigh practically attacked the question is the essential fact. 128 SIR WILLIAM RAMSAY passing electric sparks through a mixture of " dephlo- gisticated air " (oxygen) and common air in contact with a solution of caustic potash Cavendish proved that the greater part of the " phlogisticated air " (nitrogen) was identical with the constituent of nitrates. The residue, which was too small to be submitted to further treatment, was " certainly not more than T^ of the bulk of the phlogisticated air let up into the tube ; so that if there is any part of the phlogisticated air of our atmo- sphere which differs from the rest and cannot be reduced to nitrous acid, we may safely conclude that it is not more than i^th part of the whole." In the earliest attempts to isolate the suspected gas by the method of Cavendish, a Rhumkorff coil actuated by five Grove's cells was used. This was later replaced by an alternate current discharge by which an electric flame is produced, as already shown by Mr. Crookes, and the alkaline liquid for absorption was used in the form of a fountain maintained continuously within the globular vessel containing the mixed gases.1 Lord Rayleigh having already, in 1892, taken the chemical world into his confidence, it was inevitable that this essentially chemical problem should attract the attention of chemists, but it does not appear that anyone except Professor Ramsay had attempted to attack the question experimentally. Ramsay's account of what followed was related in 1898 in a lecture given to the Pharmaceutical Society 1 Trans. Chem. Soc. 1897, p. 184. THE GASES OF THE ATMOSPHERE 129 on the " Gases present in the Atmosphere," but the progress of his work can be traced by the aid of passages in letters to Lord Rayleigh and to his wife, which have been preserved. Thus he wrote to the latter on 23rd April, 1894 : " By the way curiously I am at work on nitrogen, but not from the commercial point of view, or rather Williams is. Nitro- gen of air is heavier than nitrogen from ammonia in the ratio of 251 to 250. That would correspond with the addition of some light gas to the heavy one, or of some heavy gas to the light one. If the light gas were hydrogen, it would need 7 parts in 2000 to make it so much lighter. Now no one has ever taken all the nitrogen out of the air, or rather, after all oxygen has been removed from air, no one has combined all the nitrogen. It is quite possible that there is some inert gas in nitrogen which has escaped notice. So Williams is at it now combining the nitrogen of the air with magnesium, and seeing if there is any- thing over, — anything not nitrogen. We may discover a new element." After several previous letters to Lord Rayleigh he wrote as follows on 24th May, 1894 : " I intended to ask you to-day, what is probably quite un- necessary, not to say anything about the gas which I think I have got. It may turn out a mare's nest and it would be well that no one should know of its existence. Another thing occurs to me. I have got a large amount of nitride of magnesium, which when treated with water gives ammonia. I can easily get the nitrogen out of this ammonia, and I shall be glad to give you it, if it can be conveyed to you by any way ; or what might perhaps be better, I could give you the ammonia as chloride of ammonium and you could liberate the ammonia and pass it, mixed with oxygen, over red-hot copper. I find on making a 130 SIE WILLIAM RAMSAY rough calculation that on adding my 60 c.c. of gas of sp. gr. 16 to the nitrogen from which it was obtained it would amount to 3 p.c. of the total, and that such a mixture of N = 4 with X= 16 would give a gas of the density you find. This is so far encour- aging, but I must try to further purify the gas. I think that it still contains some nitrogen, and moreover it will be none the worse of another treatment with hot magnesium. Has it occurred to you that there is room for gaseous elements at the end of the first column of the periodic table ? Thus, Li Be B C N 0 F jj jj >j 01 Mn Fe Co Ni » » » Br ? Pd Ru Rh etc. Such elements should have the density 20 or thereabouts, and 0'8 p.c. ( = THhrkh about) of the nitrogen of the air would so raise the density of nitrogen that it would stand to pure nitrogen in the ratio 230 : 231." Later on, 4th August, iiH4; the letter is headed Private : " I have isolated the gas. Its density is 19'075 and it is not absorbed by magnesium. The last passage of the gas mixed with nitrogen over red-hot magnesium eight or ten times yielded only 3 milligrams of ammonium chloride from the magnesium nitride formed. I think that there is some 1 p.c. in the nitrogen of the air. . . . The nitrogen prepared from magnesium nitride is chemical nitrogen, i.e. it has a density 1/230 below that from air (your experiments). The value of the chemical N2 is identical with yours. I have been watching the density of X creep up as absorption proceeds ; so you see this is no chance determination with a possible source of error." THE GASES OF THE ATMOSPHEKE 131 Some remarks about the spectrum of the gas follow, and on the 7th August, in reply to Lord Rayleigh, he wrote again as follows : " To take the last part of your letter first, I think that joint publication would be the best course, and I am much obliged to you for suggesting it, for I feel that a lucky chance has made me able to get Q in quantity (there are two other Xs, so let us call it Q or Quid ?) I have written out my results in a provisional way as far as they go, verified all my calculations, which were only approxi- mate ones, done in the press of work in the laboratory. It may interest you to have a synopsis which will be a sort of record, and put you at home in all I have done." The rest of the letter, occupying two sheets, contains an account of his experiments and their results. It winds up as follows : " The gas Q is now filled into a critical point tube and to-day I shall see if I can liquefy it. I shall also try sparking it with chlorine and also its action on potassium. That is all I can get through. I shall tell you on Wednesday or Thursday what the results are. Until Oxford therefore." The results of the two methods of dealing with atmo- spheric nitrogen, namely sparking with excess of oxygen in the presence of caustic potash as practised by Lord Rayleigh, and contact with hot magnesium in Ramsay's circulating apparatus, were embodied into a joint paper which was communicated to the British Association meeting in August at Oxford. A little later the question arose as to the identity of the gases obtained by the two methods, and this had to be settled. 132 SIR WILLIAM RAMSAY It is perhaps not surprising that, during several months following the announcement of the new gas, the feeling generally prevalent in this country was one of curiosity mingled with incredulity. This, however, cannot be considered to justify such remarks as those of the President of the Chemical Society at a meeting of the Society on 6th December : " He ventured to say that Lord Rayleigh and Professor Ramsay now could not hope to keep so remarkable a discovery to them- selves much longer. After having been told so much chemists could not be expected to remain quiet under the imputation that they had been eyeless during a whole century, and they would undoubtedly enquire into the matter. Although no one would seek to take the discovery out of the hands of those who had announced it, chemists unquestionably had the right, not only to exercise entire freedom of judgment, but also to critically examine the statements which had been made." It may be safely asserted that an exhibition of such impatience did not represent the feeling of the scientific world in general. The discovery was accepted almost immediately on the other side of the Atlantic, and the Hodgkin Prize given by the Smithsonian Institution at Washington was awarded to the authors before the end of the year. In the meantime both Rayleigh and Ramsay were hard at work on the numerous problems arising out of the discovery and especially the remarkable properties of the new gas. Lord Rayleigh had also collected a quantity of the gas from the Bath springs, and already, in October, they were discussing the date at which the THE GASES OF THE ATMOSPHEEE 133 paper could be read to the Royal Society. No time was being lost. On the 14th November Ramsay wrote to his wife : " To-day I tried platinum black on the gas, but no result as usual. Yesterday sodium dioxide, again fruitlessly. To-morrow Lord R-ayleigh is coming to see me in the morning and I am going to show him the circulation. I also tried to liquefy the gas to-day ; but the barometer is very low and it is difficult to make liquid nitrous oxide. . . . However, there was no sign of liquefaction." On the 16th November : " I had Lord Rayleigh with me from 11 to 3 yesterday and to lunch. He was much interested, and saw that my plan beats his hollow. I showed him an absorption going on. To-morrow I am going to show it to my class. I believe there is to be a crowd. That is not publishing, and I think that one's students deserve the first of anything." On the 17th November : " The gas is lying quiet just now. I am recirculating my whole stock and working up a new lot. To-day I made it at the lecture, about 70 c.cs., say a small wine-glassful. That too has joined the common stock. Matthews has stayed all afternoon looking after it. By Monday it will be pure. And then there is a lot to do with it." The letters which passed between the two experi- menters, often more frequently than once a week, show how anxiously and assiduously they were following up the investigation. The spectra of many samples of the gas were also being examined by Mr. Crookes and Professor Schuster, and the behaviour of the gas at low 134 SIR WILLIAM EAMSAY temperatures was being investigated by Professor C. Olszewski of Cracow, to whom a supply of the gas had been sent. Towards the end of November the prepara- tion of M.S. began, and by this time it appears that the name argon had been adopted, in reference to the chemical inactivity of the new element. The story was communicated to the Royal Society on 31st January, 1895, and in anticipation of the large attendance of Fellows and visitors a special meeting was arranged in the theatre of the London University in Burlington Gardens. The President, Lord Kelvin, was in the chair, and no one who was present on the occasion will be likely to forget the excitement with which the large audience received from Lord Rayleigh and Professor. Ramsay the details of their joint work and an account of the strange properties of the new gas. As everyone now knows, argon is a gas having a density represented by 20 1 when that of oxygen is 16, hydrogen being the unit. It refuses to enter into combination or to exhibit any chemical change, when heated to the highest temperatures in contact with the most active elements such as sodium, phosphorus, oxygen, or fluorine and therefore differs from every previously known sub- stance. It liquefies under pressure and cold, yielding a colourless liquid which boils at about — 187° C. and solidifies to a crystalline mass resembling ice. From the velocity of sound in the gas it is inferred that the molecules of argon, like those of mercury, consist of one 1 Strictly 19-94. THE GASES OF THE ATMOSPHEEE 135 atom, and its molecular weight is therefore the same as its atomic weight, namely 19*94 x 2 or 39 '88. Accord- ingly the symbol A or A! is given to the element. The chemical inactivity of v argon was the feature of the element which attracted most attention, and naturally great efforts were repeatedly made to get evidence of the formation of a compound by the gas. The announce- ment by Berthelot of the production of a peculiar viscous compound by exposing benzene vapour and argon to the action of a silent electrical discharge turned out to be a mistake, and there was no reason to suppose that the small quantity of argon absorbed was held in any way except mechanically. Ramsay held the view that " if argon forms a compound it must be with some rare element. It would have been discovered years ago if it had formed one with any of the commoner elements." On the day following the meeting at the Royal Society he received from Mr. H. A. Miers (afterwards Sir Henry), Keeper of the Mineral Department of the British Museum, -a letter drawing his attention to the work of Hillebrand {American Journal of Science (1890), xi. 384), who reported the frequent presence of what he supposed to be nitrogen in the natural uranates. Both Miers and Ramsay believed that the mineral cleveite, one of the uranates, would be found to contain a compound of argon. On the 17th March, 1895, in a letter to Mr. Buchanan, Ramsay refers to the gas from cleveite as follows : " Crookes thinks its spectrum is new, and I don't see from the method of treatment how it can be anything old, except argon, 136 SIK WILLIAM KAMSAY and that it certainly is not. We are making more of it and in a few days I hope we shall have collected enough to do a density. I suppose it is the sought for krypton, an element which should accompany argon. . . . We have settled the question of argon in the animal economy : there is absolutely no trace of argon in peas or in mice. And I have done a good deal as regards density, specific heat and expansion, a paper on which I shall send in to the R.S. for next Thursday." The presentation of the paper referred to had to be postponed, for within the week the new gas had been identified. The surprise and delight of Ramsay may be conceived when he found that the gas which he obtained from this mineral contained not only argon, but a gas which from its highly characteristic spectrum was recognised as the hypothetical solar element to which the name helium had been given by Lockyer many years before. On 24th March he wrote as follows to his wife : " Let's take the biggest piece of news first. I bottled the new gas in a vacuum tube, and arranged so that I could see its spec- trum and that of argon in the same spectroscope at the same time. There is argon in the gas ; but there was a magnificent yellow line, brilliantly bright, not coincident with but very close to the sodium yellow line. I was puzzled, but began to smell a rat. I told Crookes, and on Saturday morning when Harley, Shields and I were looking at the spectrum in the dark room a telegram came from Crookes. He had sent a copy here 1 and I enclose that copy. You may wonder what it means. Helium is the name given to a line in the solar spectrum, known to belong to an element, but that element has hitherto been unknown on 1 12 Arundel Gardens, their home. THE GASES OF THE ATMOSPHEEE 137 the earth. Krypton was what I called the gas I gave Crookes, knowing the spectrum to point to something new. 587*49 is the wave-length of the brilliant line. It is quite overwhelming and beats argon. I telegraphed to Berthelot at once yesterday — • ' Gas obtenu par moi clevite melange argon helium. Crookes identifie spectre. Faites communication Academic lundi — Ram- say/ ... I have written Lord Rayleigh and I'll send a note to the R.S. to-morrow, but it will be merely a claim for priority, for there will be no meeting for a month." On the 27th March the Annual Meeting of the Chemical Society, only two months after the great meeting of the Eoyal Society, provided a fitting opportunity for com- municating this remarkable discovery to English chemists. The Faraday medal was first presented to Lord Eayleigh and the usual course of proceedings was then interrupted to allow Ramsay to make his communication, which can only be described as start- ling in its effect on the minds of all present. The Trans- actions of the Society contain the following record of the words spoken by Ramsay on this occasion : " In seeking a clue to compounds of argon I was led to repeat experiments of Hillebrand on cleveite, which, as is well known, when boiled with weak sulphuric acid, gives off a gas hitherto supposed to be nitrogen. This gas proved to be almost free from nitrogen ; its spectrum in a Pliicker tube showed all the prominent argon lines, and in addition a brilliant line close to, but not coinciding with, the D lines of sodium. There are, moreover, a number of other lines, of which one in the green blue is especially prominent. Atmospheric argon shows, besides, three lines in the violet which are not to be seen, or if present, are excessively feeble in the spectrum of the gas from cleveite. 138 SIR WILLIAM RAMSAY This suggests that atmospheric argon contains, besides argon, some other gas which has as yet not been separated and which may possibly account for the anomalous position of argon in its numerical relations with other elements. Not having a spectroscope with which accurate measurements could be made, I sent a tube of the gas to Mr. Crookes, who has identified the yellow line with that of the solar element to which the name ' helium ' has been given. He has kindly undertaken to make an exhaustive study of its spectrum. I have obtained a considerable quantity of this mixture and hope soon to be able to report concerning its properties. A determination of its density promises to be of great interest." It is scarcely necessary to remark that at that time no one expected to make a close acquaintance with helium as a terrestrial element. The line D3 charac- teristic of the element supposed by Lockyer to exist in the sun had been measured many years previously by Angstrom and by Cornu and their estimates were now confirmed by the work of Crookes, who gave the wave- length as 587'45. , The mineral cleveite is a variety of uraninite, and •minerals containing the element uranium were found very generally to yield more or less helium together with hydrogen, nitrogen and other gases. Helium was found to be like argon, chemically inert. Its density is a little less than twice that of. hydrogen, namely T99 and it is composed of monatomic molecules, like those of argon. Its molecular weight is therefore approxi- mately 4 and the symbol is He. It may be added here that all attempts to liquefy helium remained for many THE GASES OF THE ATMOSPHEEE 139 years fruitless and that the liquefaction was accom- plished in 1908 by Professor Kamerlingh-Onnes of Leiden. The boiling point of the liquid is the lowest known, as it is approximately 4*5° absolute or 268° to 269° below zero Centigrade. Immediately after the meeting of the Chemical Society in London Ramsay and his wife went to Paris in fulfilment of an engagement to lecture on argon to the Societe Chimique de Paris. Before leaving home he received through M. le Chatelier an urgent request that he would give a demonstration on the same sub- ject to the 500 students of the feole Poly technique. This he consented to do, and in a letter to his children, dated; Paris 31st March, 1895, he gave them an account of the proceedings on both occasions. Needless to say, the lectures were received with enthusiastic applause. This period, so full of interest and excitement, must have been very exhausting to Ramsay, for it must not be forgotten that the teaching at University College made considerable demands on his time and energy. At the end of the session he wisely sought a holiday under conditions which would make him secure of uninterrupted relief, and in company with his colleague, Professor W. P. Ker, he started in August for Iceland. Some account of this excursion will be found later on. Some bottles of gas were collected at the hot springs near Reykjavik, but they appear to have contained no helium but only a notable quantity of argon. (Kellas and Ramsay, Proc. Roy. Soc., Nov. 1895.) 140 SIR WILLIAM RAMSAY The following spring Ramsay visited Cauterets in the Pyrenees accompanied by Dr. Morris Travers. They started from the Thames and went by sea to Bordeaux and on by train to Pan. Thence they travelled to Pierrefitte, visiting Lourdes on the way, and reached Cauterets in a snowstorm. An interesting letter to his wife, giving an account of the visit to the springs, is dated 2nd April, 1896. The Proceedings of the Royal Society, 4th Feb., 1897, contain an account of the examination of the gas from Cauterets, which was found to contain both argon and helium. A difficulty which presented itself in connection with these new elements was the impossibility of finding for them a suitable place in the periodic scheme of Mendeleeff, which had already been accepted by the chemical world for the classification of all the previously known elements. This difficulty was discussed in the latter part of the paper by Ramsay, Collie and Travers on the sources and properties of helium, published in the Transactions of the Chemical Society for June 1895. Here it was pointed out that " if argon possesses the atomic weight 40, there is no place for it in the periodic table of the elements." At the anniversary meeting of the Royal Society on November 30th in that year, the Davy Medal was awarded to Ramsay on grounds which are set forth in the following passage in the President's Address. After referring to his earlier work, chiefly in connection with problems in physical chemistry, it proceeds : THE GASES OF THE ATMOSPHEEE 141 " But the researches on which the award of the Davy Medal to Professor Eamsay is chiefly founded are, firstly, those which he has carried on, in conjunction with Lord Rayleigh, in the investigation of the properties of argon, and in the discovery of improved and rapid methods of getting it from the atmosphere ; and, secondly, the discovery in certain rare minerals of a new elementary gas which appears to be identical with the hitherto hypothetical solar element, to which Mr. Lockyer many years ago gave the name of ' helium.' . . . The conferring of the Davy Medal on Professor Ramsay is a crowning act of recognition of his work on argon and helium which has already been recognised as worthy of honour by scientific societies in other countries. For his discoveries on these gases he has already been awarded the Foreign Member- ship of the Societe Philosophique de Geneve and of the Leyden Philosophical Society. He has had the Barnard Medal of the Columbia College awarded to him by the American Academy of Sciences, and within the last few weeks he has been elected a Foreign Correspondent of the French Academic des Sciences." The novel characters of the gases, helium and argon, led to great activity in the scientific world, and for a time the journals were filled with speculations as to their origin, their atomic constitution, their recognition in the earth's atmosphere and in the heavenly bodies, and their position in the scheme of known elements. The excitement extended beyond scientific circles, and all sorts of amateur physicists plunged into extravagant hypotheses as to the functions of argon in nature. Even young students were infected with the epidemic, and the answers to examination questions showed that oxygen as a constituent of our air was almost forgotten in the 142 SIR WILLIAM RAMSAY anxiety on the part of the candidate to show that he or she knew all about argon. The actual state of knowledge concerning the new gases in 1897 will best be described in Ramsay's own words, and fortunately an excellent summary is given at the end of a paper which he communicated to the Annales de Ckimie et de Physique and which appeared in April 1898. The following is a slightly abbreviated translation of this summary : " Without attempting to mention the numerous theories and hypotheses which have been published with reference to argon and helium, we will confine ourselves to positive facts. The densities of helium and argon are respectively 1'98 and 19'94. The relation between the specific heats at constant volume and constant pressure for each gas is 1*65. This relation can only be consistent with the simplest molecular structure. The molecules must be incapable of motion of any kind except that in virtue of which they traverse space. If there is any other kind of motion, it can only be exceedingly small. The imaginary atoms of Boscovich could alone strictly comply with this condition, and since these gases give well-defined spectra it follows that they are not entirely without internal movement. All that can be stated therefore is that the vibration which produces the spectrum cannot be considerable enough to have an appreciable influence on the ratio of their specific heats. We may recall the fact that mercury, an element which for other reasons is regarded as mono-atomic, exhibits the same relation. It seems that the conclusion is inevitable that the molecules of helium and argon are each formed of one atom. Hence it follows that the atomic weight is double the density or 3*96 for helium and 39 '88 for argon. If these gases, however, are not homogeneous, if they consist THE GASES OF THE ATMOSPHERE 143 of mixtures of mono-atomic elements, these atomic weights would be merely the mean atomic weights of the elements con- tained in such mixtures taken in the proportions in which they are present. "We must ask therefore what evidence there is that they are mixtures. Considering helium first, MM. Runge and Paschen, Mr. Lockyer and others have maintained that spectral analysis shows helium to be in reality a mixture of two elements. It is sufficient to remind the two German savants that they have expressed the view that the evidence of com- plexity of helium applies also to the case of oxygen. No one hitherto has suspected oxygen of being a mixture. Our repeated efforts to effect a separation of helium into two elements, by means of diffusion, have only succeeded in showing that the helium from minerals may contain a small quantity of argon. If there were two elements they must have the same density. As to the hypothesis of Mr. Lockyer, who bases his idea on the fact that the stars do not exhibit all the lines of helium, it must not be forgotten that greater or less pressure, and temperature more or less elevated, produce considerable differences in the spectrum of helium in the relative intensity of the lines and even in their existence. Our knowledge of the conditions prevailing in the stars is so incomplete that it may well happen that certain lines are missing and we can draw no conclusion therefrom. I cannot answer for the homogeneity of argon with the same assurance. Diffusion experiments gave two portions of gas, the one having the density 19'93, the other less diffusible 20'01. If, however, there is any foreign gas present, it must be in very minute quantity, and would have no considerable effect on the atomic weight. The mono-atomicity of helium is connected with its other physical properties. Having an atomic weight nearly four times that of hydrogen, it ought to have a higher boiling point. How- ever, Professor Olszewski has been unable to liquefy it at a temperature much lower than that at which hydrogen becomes 144 SIB, WILLIAM EAMSAY liquid. This leads to the supposition that its structure must be simpler than that of hydrogen. We are accustomed to believe that the polymerisation of a substance raises its boiling point, and accordingly since hydrogen gas is the polymer of the unknown atomic hydrogen, its liquefaction is possible. In support of the hypothesis of the mono-atomicity of helium may also be cited its extraordinary conductivity for electricity, its feeble refractivity for light and its unexpected rapidity of diffusion. As it possesses exceptional properties, we are led to conclude that its molecular constitution is different from that of other gases. With regard to the position of argon in the periodic scheme it is sufficient to indicate that if it possesses an atomic weight higher than that of the element which succeeds it in the table, namely potassium, it is not alone in this peculiarity, for the atomic weight of tellurium is undoubtedly above that of iodine, its suc- cessor in the table. Admitting then that the atomic weight of helium is about 4, and that the atomic weight of argon is about 40, the difference between these two figures is 36. Now this is just the difference observable among the members of the following series : Fluorine 19 16*5 Chlorine 35'5 19-5 Manganese 55 Oxygen Sulphur Chromium 16 16 32 20-3 52-3 Carbon 12 Boron 11 16-3 16 Silicon 28*3 Aluminium 27 19'8 17-1 Titanium 48' 1 Scandium 44' 1 Nitrogen 14 17 Phosphorus 31 20-4 Vanadium 51-4 Glucinum 9-1 15-2 Magnesium 24-3 15-8 Calcium 40-1 Lithium Sodium 16 23 16-1 Potassium 39*1 Helium Argon 16 20 20 40 THE GASES OF THE ATMOSPHEEE 145 The differences between the extremes are as follows : Manganese — Fluorine - - 36 Chromium — Oxygen - 36 '3 Vanadium — Nitrogen ! -; - 37*4 Titanium — Carbon - - 36*1 Scandium — Boron - - 33*1 Calcium — Glucinum - 31 Potassium — Lithium " - - 32 '1 Argon — Helium - - 36 These differences are not very far from 36. I believe therefore that an element hitherto unknown should find a place between helium and argon. We have looked for this element in vain. However, we have not given up the search, and if we succeed the discovery would throw much light on the nature of helium and argon." In September 1897 the meeting of the British Associ- ation took place at Toronto in Canada, and Ramsay was President of the Chemical Section. The customary address was occupied chiefly with an exposition of the relations of helium and argon very nearly on the lines of the summary just given. With these considerations as a guide the discovery of an elementary gas, having a density 10 and atomic weight 20, was foretold. This prophecy, however, was not realised till a year later, when Ramsay and Travers announced in June 1898 the discovery of a new gas in the least volatile portion of a large quantity of liquid air. This gas they named krypton (hidden). A fort- night later they discovered another gas called neon (new), which was found to possess the density required for the 146 SIR WILLIAM EAMSAY element predicted for the position between helium and argon. A gas named metargon, announced at the same time, proved afterwards to be a mixture containing carbonic oxide. By allowing a large quantity of liquid air to evaporate quietly, and removing oxygen and nitrogen from the residue, a mixture of argon and krypton was obtained, in which was detected yet another gas in small quantity, to which the name xenon (the stranger) was given. All these gases agree with argon in chemical inactivity and in consisting of monatomic molecules. Their densities, boiling points, critical temperatures and pressures, refractivities and spectra have been examined and recorded, and the " Companions of Argon " form a complete series running parallel with the halogen elements on the one side and with the alkali metals on the other, as shown below : Hydrogen 1 Helium 4 Lithium 7 Glucinum 9 Fluorine 19 Neon 20 Sodium 23 Magnesium 24 Chlorine 35-5 Argon 40 Potassium 39 Calcium 40 Bromine 80 Krypton 82 Rubidium 85 Strontium 87 Iodine Xenon Caesium Barium 127 128 133 137 Here the atomic weights are given in round numbers, but when the most accurate determinations of the atomic weight of argon are compared with those of potassium, the figure for the former element is still too great Taking the atomic weights given in the most THE GASES OF THE ATMOSPHERE 147 recent Table of the International Committee (1916), namely A = 39*9, K = 39*l, the value for argon is too high. It looks therefore as though this was an anomaly similar to that which has for so many years been a subject of repeated investigation, namely the relation of tellurium (Te = 127'5) to iodine (I=126'92). As Ramsay remarks at the end of one of his papers (Proc. Roy. Soc. 67, 333), "the conundrum of the periodic table has yet to be solved." Of the companions of argon, neon, krypton and xenon are found with it among the constituents of our atmo- sphere. Helium, however, the lightest of them all, was not at first detected in the air. notwithstanding repeated experiments made by Lord Rayleigh and by Ramsay with this object. It is, however, curious that helium is found in connection with certain sources of hot mineral waters, though not in all. Thus the water of the geysers in Iceland contain not a trace, neither do the waters of Harrogate and Strathpeffer, while the springs at Wildbad, in the Black Forest, are said to contain small quantities, and it has also been found in the waters of Bath and Cauterets (Basses Pyrenees). Helium was recognised in the air much later by Baly and others (Nature, October 1898). The late Dr. Johnstone Stoney, in discussing the atmospheres of planets and satellites (Trans. Roy. Dublin Society, 1897), expressed the view that the com- position of the atmosphere composed of a mixture of gases depends on the velocity of translation of the 148 SIR WILLIAM RAMSAY molecules and the mass of the central body. The composition of the earth's atmosphere, the absence of atmosphere around the moon and the composition of the solar atmosphere, which contains hydrogen and helium mixed with heavier gases, are thus explained, and it appears that a gas of lower density than ammonia would sooner or later disappear from the earth. Hence any helium in our atmosphere would escape sooner or later. The annual meeting of the Chemical Society was this (1897) year marked by two events, both of which testify to the position Ramsay occupied in the esteem of the chemists of his own country. The presentation of the LongstafE Medal, " for the discovery of helium and for his share in the investigation of argon," represented only another unit in the long series of prizes and dis- tinctions which had fallen to his lot, and being available only once in three years, this was the first opportunity for the award of the medal by the Council. This year, however, was the unprecedented occasion of a division in the Chemical Society in regard to the nomination of President. In accordance with custom the new presi- dent was nominated by the Council for election at the annual meeting. A considerable number of the Fellows, however, being desirous of seeing Ramsay in the chair, proposed him formally in opposition to the official nominee. That this was done without his knowledge is shown by a passage in a letter to his friend Fyfe, dated the 21st March, ten days before the anniversary, THE GASES OF THE ATMOSPHERE 149 which runs as follows : " Last Thursday I wasn't at the meeting, for Fitzgerald was arriving that evening, and next morning I heard to my horror and surprise that 116 of the Fellows had nominated me." The matter being pushed to a conclusion, the scrutators reported, after a recount, 152 votes in his favour against 166 for the Council's nominee. But happily the ferment settled down, and ten years later Ramsay became Presi- dent of the Chemical Society. The history of these remarkable discoveries would not be complete without some reference to the attacks made from time to time on Ramsay, in which it was alleged that he had endeavoured to appropriate a larger share of credit in connection with the work than his due. The correspondence which has been preserved shows that no feeling of this kind existed on the part of Lord Rayleigh. Very wisely neither of the co-discoverers replied to these attacks. Twenty years have passed since that time, and Ramsay's reputation not only for scientific insight, and experimental skill, but for manly straightforwardness and honesty of purpose combined with enthusiasm, has long since been established beyond the reach of jealousy and detraction. At the end of the year 1898 Ramsay was in Berlin, and on 19th December he gave a lecture on the gases to the German Chemical Society, and a report was printed in the Berichte (p. 3111). The following day, at the request of the Empress, he gave an account of their chief properties to the court, and the Emperor and 150 SIR WILLIAM RAMSAY Empress accompanied by Sir Frank Lascelles, British Ambassador, came to the Chemical Institute. On the 21st he lectured in German to a very large audience at the Urania, the Berlin popular institute of sciences. APPENDIX I TO CHAPTER V IT has already been mentioned that Ramsay was Presi- dent of the Chemical Section of the British Association meeting at Toronto, and a short summary of his address has been given. The story of the journey with his family to Canada and back cannot be told better than in his own words in a letter, dated 10th October, to Mr. Fyfe on his return home. " When we started on the Parisian I think I knew 70 of our fellow-passengers, not including many wives ; so there was no lack of company. We took our meals next old Turner of Edin- burgh,1 who was a very pleasant and talkative neighbour. He keeps his eyes on people's skulls. By the way Mag had the broadest on board ; but Elska and Willie had the more dolicho- cephalic than even I. We had the usual carryings on — concerts, lectures — one excellent evening of tales from Selous concerning his chase of elephants and lions, and also concerning him in the role of the hunted ; the last was exceedingly dramatic. ... I stood his sponsor on admitting him into the Red Lion Club later on at Toronto. I pled two excuses on his behalf ; first that he had been known to run away from a lion ; second that he had once missed a lion ; and promised on his behalf that while in 1 The late Sir William Turner, Professor of Anatomy, afterwards Principal and Vice-Chancellor of the University. He died in 1916 at an advanced age. APPENDIX TO CHAPTER V 151 America he would never kill a lion. Donald MacAlister, who was the " Lion-King," bestowed on him the degree of L.L.D. — 4 Leo Leonum Destructor.' Sir George l Robertson of Chitral was also one of our fellow-passengers, and he and Selous capped one another's stories and made us much joy. It was not a * sick transit ' and the ' gloria mundi ' was unabated. We went straight into Montreal by the Parisian and took up our quarters with Mr. Russell Baldwin, who was a most exemplary host. The section pursued its usual course, and we had a good attendance of U.S. chemists, among others a number of my old friends. Remsen was there, also Clarke from Washington, and a lot of others whom you never heard of. The usual round of garden parties and receptions was given, and Lord and Lady Aberdeen graced the show. At a final dinner given to us by the munici- pality, he being in the chair, he shouted out ' Is the Bishop of Ontario present ? ' No reply. ' Is the Reverend Augustus Thomson present ? ' No reply. ' Then thank God for these and all His mercies.' 2 . . . From Toronto we went straight west on the Canadian Pacific Ry. We took the lake route and spent ten days on Huron and Superior. Then by train to Winnipeg, considerably grown but not so much altered as I expected after 13 years, and on to Glacier, crossing the Rockies and the Selkirks. One fine morning, at 6 o'clock, on approaching the Rockies, Elska and I were on the end platform of our carriage, which was the end of the train. We were jogging along at the customary 20 miles an hour. Suddenly a band of Indians dressed in coloured blan- kets and with eagles' feathers on their heads galloped out from behind a small wood and drew up, reining in their horses on their haunches, quite close to us. We waved to them and they to us, and we steamed slowly ahead. It was a romantic sight and 1 This must be a mistake for Brig. -Gen. William Robert Robertson. 2 This is a sort of personal parody of the query by C. V. L. in Charles Lamb's " Grace before meat." 152 SIB WILLIAM EAMSAY reminded us of the old Fenimore Cooper days. Most of these people look like very decayed gentlemen, grave and sedate, but very seedy. The Rockies are rocky and bare, the Selkirks like the Alps ; — all covered with snow and with pine trees on the lower slopes. Then we came back. Most of our friends went on to Van- couver and Victoria ; but we wanted to spend as long a time as possible with Pat Buchanan. So we turned at Medicine Hat — the oddest of a lot of odd names along this route — and took a narrow gauge line south to Montana. At Great Falls, on the Missouri, we found Pat, and were introduced to his numerous acquaintances there. It is a pretty town and perfectly civilised. By the way, in all American towns the electric car is the chief feature. There are overhead wires and cars like our tram cars, run at a prodigious rate, careless of life apparently, yet there are very few accidents. I suppose the fittest, i.e. those who don't get killed, survive. They are delightful as a form of motion and almost rival the bicycle. That creature, too, has penetrated everywhere, and is used even over the prairie. We drove out to Pat's ranche, and stayed there for 11 days. It is a fine place. He and his partner must possess at least 20 miles square of territory, — as much say as Stirlingshire. It is not all theirs, but they hold all the water, and the rest of the land is useless to anyone else. They lead an Arcadian life, have a comfortable house and many helps, — men, horses and cows and innumer- able sheep. They are doing first rate now that the wool is looking up. To cut a long story short, we came back via Niagara and stayed three days at Springfield, Mass., with South worth, Bemsen's brother-in-law, very pleasantly ; caught the steamer at Quebec, and after a good passage got home last Monday. It seems as if I had never been away. Such is the perversity of human nature." APPENDIX II TO CHAPTER V 153 APPENDIX II TO CHAPTER V APPARATUS used by Rayleigh and Ramsay for isolating argon on a large scale from the air. FIGURE 1 — MAGNESIUM METHOD. A is the circulator. It consists of a sort of Sprengel's pump (a), to which a supply of mercury is admitted from a small reservoir (6). This mercury is delivered into a gas-separator (c), and the mercury overflows into the reservoir (d). When its level rises so that it blocks the tube (/) it ascends in pellets or pistons into (e), a reservoir which is connected through (g) with a water- pump. The mercury falls into (6) and again passes down the Sprengel tube (a). No attention is therefore required, for the apparatus works quite automatically. The gas is drawn from the gasholder B, and passes through a tube C, which is heated to redness by a long flame burner and which contains in one half metallic copper and in the other half copper oxide. This precaution is taken in order to remove any oxygen which may possibly be present (in the atmospheric " nitrogen " used), and also any hydrogen or hydrocarbon. In practice it was never found that the copper became oxidised, or the oxide reduced. The gas next traversed a drying tube D, the anterior portion containing ignited soda lime and the posterior portion phosphoric anhydride. From this it passed to a reser- voir D', from which it could be transferred, when all absorption had ceased, into the small gasholder. It then passed through E, a piece of combustion-tube, drawn out at both ends, filled with magnesium turnings and heated by a long flame burner to red- ness. Passing through a small bulb, provided with electrodes, it again entered the fall-tube. After the magnesium tube E had done its work, the stopcocks were all closed, and the gas was turned down, so that the burners 154 SIR WILLIAM RAMSAY APPENDIX II TO CHAPTER V 155 might cool. The mixture of argon and nitrogen remaining in the system was pumped out through a Sprengel pump through F, collected in a large test-tube and re-introduced into the gas- holder B through the side tube G, which requires no description. The magnesium tube was then replaced by a fresh one ; the system of tubes was exhausted of air ; argon and nitrogen were admitted from the gasholder B ; the copper tube and the mag- nesium tube were again heated ; and the operation was repeated till absorption ceased. It was easy to decide when this point had been reached, by making use of the graduated cylinder H, from which water entered the gasholder B. It was found advisable to keep all the water employed in these operations, for it became saturated with argon. If gas was withdrawn from the gasholder, its place was taken by this saturated water. By means of magnesium about 7 litres of nitrogen can be absorbed in an hour. The changing of the tubes of magnesium, however, takes some time ; consequently the largest amount absorbed in one day was nearly 30 litres. From the result of a special quantitative experiment it may be concluded, with probability, that argon forms approximately 1 per cent, of the atmospheric nitrogen. FIGURE 2 — OXYGEN METHOD. The vessel A is a large globe of about 6 litres capacity and stands in an inclined position. It is about half-filled with a solution of caustic soda. The neck is fitted with a rubber stopper By provided with four perforations. Two of these are fitted with tubes (7, Z), suitable for the supply of withdrawal of gas or liquid. The other two allow the passage of the stout glass tubes E, F, which contain the electrodes. For greater security against leakage the interior of these tubes is charged with water held in place by small corks, and the outer ends are cemented up. The electrodes are formed of stout iron wires, terminated by thick platinums G, H, triply folded together and welded at 156 SIR WILLIAM RAMSAY APPENDIX II TO CHAPTER V 157 the ends. The upper part of the flask is cooled by water, which is enclosed by a lead wall partially shown at I. For greater security the india-rubber cork is also drowned in water, held in place with the aid of sheet-lead. The lower part of the globe is occupied by about 3 litres of a 5 per cent, solution of caustic soda, the solution rising to within about half-an-inch of the platinum terminals. In a successful experiment 9250 c.c. of air were used and 10,820 c.c. of oxygen were consumed, the proportion of oxygen being to nitrogen as 1'75 to 1*0, that is, more than sufficient to convert the nitrogen into nitrous acid, in which form it is absorbed. The argon ultimately left after absorption of the excess of oxygen amounted to 75 c.c., or a little more than 1 per cent, of the atmospheric " nitrogen " used. (Phil Trans, vol. 186, part I A, p. 212 to p. 219.) CHAPTER VI WOKK ON RADIUM IN 1902 radium salts were isolated by Madame Curie, and naturally the physical and chemical properties of these remarkable substances attracted a large number of investigators. Ramsay desired to examine the spec- trum of the " emanation " which is evolved from radium, and with the co-operation of Dr. Frederick Soddy, who had come to work in his laboratory in the autumn of 1903, experiments were begun with this object. Ramsay was a skilled manipulator of small quantities of gas, having determined the physical properties of xenon with less than 4 cubic centimetres, but in the case of the emanation where it was a matter of cubic millimetres special apparatus had to be devised. After some pre- liminary attempts, vacuum tubes were made out of thermometer tubing, and the emanation being admitted the experimenters were surprised to find helium present. Subsequently the volume of emanation evolved in a given time from a given weight of radium bromide, and the quantity of helium disengaged from a known volume of emanation were approximately measured. 158 WORK ON RADIUM 159 The emanation was recognised as possessing the pro- perties of a true gas obeying Boyle's law like other gases. It had been previously shown by Rutherford and Soddy to be chemically inert like argon. This production of helium from the emanation Ramsay speaks of as the first observed case of " transmutation," for radium and its emanation as well as helium must be counted among the substances known as " elements." This idea de- veloped later into the conviction that radio-active change might be made use of to effect the transmutation of the common elements. This subject will be referred to later. The important discovery just described gives the clue to the sources of helium in natural spring waters which evidently rise through or from radiferous rocks. As to the homologues of heKum, namely argon and the rest, no corresponding source is known. But if analogy may be relied on it seems probable that argon, neon, krypton and xenon are, like helium, products of radio-active change occurring in substances similar in constitution to radium but having much higher atomic weight and a far more unstable constitution. These have long since disappeared from among the known mineral constituents of this earth's crust. Ramsay does not seem to have occupied himself with this point of view, which obviously cannot be put to the test of experiment.1 Some years later he seems to have thought it possible that neon and 1 This speculation is discussed in the pages of a little book, The Elements, by Sir W. A. Tilden (Harpers). 160 SIR WILLIAM RAMSAY argon result from partial degradation of the radium emanation (Trans. Chem. Soc. 1907, p. 1605). The search which Ramsay undertook later (Proc. Roy. Soc. 81, p. 178) concerning the existence in the atmos- phere of possible new members of the inactive series of gases led to a negative result. With the aid of Mr. H. E. Watson, who photographed the spectrum of the lighter constituents of the air, and of Professor Richard B. Moore, who investigated the less volatile portions of no less than 120 tons of liquid air, no new constituent of the atmosphere could be detected. But Ramsay pointed out that there are gaps in the periodic table which conceivably might be fitted by elements of the inactive series having a higher atomic weight than that of xenon. From the known gradation of properties passing from helium to xenon it was certain that the missing elements must be gases, and it was almost equally certain that they would form no compounds. Three gases were known which are as inactive chemi- cally as those of the argon group, but they disintegrate during the process of separation. These were the eman- ations from radium, thorium and actinium. Various attempts to determine the atomic or molecular weights of the emanations of radium and thorium led only to an estimate for the emanation of radium as about 175. Ramsay was, however, dissatisfied with the condition of uncertainty *ifL which this interesting problem was left in 1908. And soon afterwards he began a series of experiments, with the assistance of Dr. Whytlaw Gray, WOEK ON KADIUM 161 on the direct estimation of the density of the radium emanation. This research must be regarded as one of the most wonderful ever recorded in the annals of experiment. Remembering the exceedingly small volume of the eman- ation obtainable from a relatively large weight of radium, it is not surprising that other experimenters using methods based on the measurements of the rate of diffusion or of effusion had arrived at widely divergent values for the density of the gas. The majority of the numbers obtained pointed to an atomic weight either 176 or 222, and these are the tabular atomic weights of the two next terms following xenon in the periodic table, thus : Helium Neon Argon Krypton Xenon I II 4 20 40 83 130 176 222 The problem, then, to be attacked was the deter- mination of the weight of emanation evolved in a given time from a known weight of radium. The volume being already known from the experiments of Rutherford in 1903, those of Debierne in 1909, and confirmed shortly afterwards by Gray and Ramsay. As shown in the paper communicated to the Royal Society in December 1910 (Proc. Roy. Soc. 84 A, p. 536), the total volume of the gas obtainable for weighing scarcely exceeded ^ cubic millimetre, a scarcely visible bubble, and if the atomic weight is assumed to be 222 the weight is less than T^Vo milligram. It is evident therefore that in 162 SIR WILLIAM RAMSAY order to weigh this minute quantity of gas with sufficient exactness a balance turning with a load not greater than TO 60 oo milligram was a necessity. Such a balance has been constructed and described by Dr. B. D. Steele and Mr. Grant, of the University of Melbourne, and they showed that a sensibility of -gsoooo milligram could be attained. It would be impossible to convey in these pages any clear idea of the operations involved in the construction of the balance, the collection of the gas to be weighed and the manipulation during the process of weighing. Every student of chemistry and physics should read carefully the description of the work set forth in the paper referred to. All that need be added is the result of the five concordant experiments recorded in the paper, and the mean of them, namely 227 226 225 220 218 Mean 223 The density, and hence the atomic weight, of the gas were therefore settled. In view of the character of the emanation, which is a gas belonging to the argon series of inactive elements, Ramsay assigned to it the name niton, with the symbol Nt.< The concluding words of the memoir express very clearly the importance of the result. " The research, of which the foregoing is an account, yields a further proof, if such were necessary, of the beautiful theory of the disintegration of the radio-active elements originally advanced by Rutherford and Soddy in 1902. The determination of the density of a gas, even with approximate exactness, has always been regarded as establishing its molecular weight, the accurate WORK ON RADIUM 163 value of which may have been derived from other considera- tions. In the present case these considerations are the result of the disintegration theory. Determinations by Madame Curie and by Thorpe of the atomic weight of radium show beyond all doubt that it differs little from 226*4. That four atoms of helium separate from one atom of radium is rendered almost certain from the work of Dewar and from experiments by Rutherford and by Ramsay and Soddy. That three atoms of helium are lost by niton on decay has been shown in the preceding pages. It follows that one helium atom must escape when radium changes into its emanation ; hence the true atomic weight of the emanation must be 222*4. This number hardly differs from the mean of the atomic weight determinations given in this paper ; and the disintegration theory receives a further con- firmation." Ramsay's views as to the utilisation of radio-active change to effect chemical decomposition and even " transmutation " of elements, have already been re- ferred to. His study of the emanation of radium, or niton as he called it, led him to consider this problem seriously and to make experiments; the results of which are recorded in two papers * communicated to the Chemical Society in 1907. The first of these commences with the following remarks : " The emanation from radium is one of the most potent, if not thejnost potent chemical agent which exists in nature. Of all known substances it is endowed with the greatest content of potential energy ; for one cubic centimetre contains, and can evolve, nearly three million times as much heat as an equal volume of a mixture of two volumes of hydrogen with one of 1 Transactions (1907), p. 931, part i. ; Transactions (1907), p. 1593, part ii. (Cameron and Ramsay). 164 SIR WILLIAM RAMSAY oxygen. The spontaneous change which it undergoes, more- over, is accompanied by the emission of an immense number of corpuscles, expelled with a velocity approaching that of light in magnitude and which have a remarkable influence on matter." With the design of applying this immense and con- centrated store of energy to the production of chemical change, experiments were first made on the action of radium bromide on water, then on the action of the emanation on water and on a mixture of oxygen and hydrogen. Giesel was the first to observe the fact of the decomposition of water by radium salts, but Bod- lander and later Ramsay and Soddy found that the mixture of evolved gas contains an excess of hydrogen. Ramsay now found that the action is reversible, but that the velocity of decomposition of water by the emanation is greater than that of the recombination of the resulting gases. The rate at which water is decomposed by the emanation presents a problem which was found to be insoluble in the present state of knowledge. The second paper referred to contains an account of the action of emanation on solutions of copper and lead. The details concerning the apparatus and operations involved are very complicated, and every precaution seems to have been observed against the introduction of impurity and the possibility of error. The conclusions, however, are of such fundamental significance that no amount of skill and labour would be wasted in their verification. For these experiments lead to the sug- WORK ON RADIUM 165 gestion that the elementary atoms of copper and lead undergo a process of degradation, the former into sodium and lithium, the latter into products not finally identified. Thorium nitrate submitted to the same action continually produces carbon dioxide. At the same time the helium which is evolved when emanation is left alone or in admixture with oxygen and hydrogen gases is replaced by argon when a copper salt is simul- taneously present in solution. Other suggestions are made in this important paper, and letters to his friend Worthington give evidence of the fermentation which this interesting subject set up in his mind. Thus, the following passage occurs (21st Nov., 1906) : " I have the first proof that lead nitrate plus emanation gives C02. I am, of course, repeating. Other things don't, so far as I have tried them, except thorium nitrate. . . . The order of events appears to be : radium emanation, which is obviously an argon gas, gives, when it disintegrates besides Rutherford's A, B, C, etc., about 7'5 p.c. of its weight of He. CuS04 . Aq plus emanation gives LigSC^, and now Pb(N03)2 and Th(N03)4 give C02. I think that the pouring of such thundering amounts of energy as come off the Ra emanation into these atoms (counting these 7' 5 p.c. of the Ra emanation as also affected by the energy given off by the odd 92*5 p.c. which disintegrates) brings them down to their lowest members. Thus Li is the lowest member of the Cu group. j? .tie ,, ,, ,, A. ,, „ C „ „ „ Pb and Th groups. Other members may be formed simultaneously. I think that Na is also formed from Cu. I can't tell whether A or Kr are formed from Emn, or whether Si, Ti, etc., are formed from Pb 166 SIR WILLIAM RAMSAY or Th. We will see. I have expts. on now to try whether Al, In and Te give B ; and whether Bi gives N2. I think I can detect these." Again (25th July, 1907) we find : " I am now trying to see whether the sodium one finds is real, by using a silica bulb. ... I am pretty sure that Na must be formed, for Na is a much commoner element than Li in nature, and if copper is to be degraded it would more likely go to the stable form of Na father than to the less common, and therefore probably more unstable form of Li. Also I want to be dead certain that argon is not derived from the atmosphere. . . . The next shot would be to try some heavier metal, say gold, and see if krypton will not be formed from the emanation. Gold, too, should give alkali metals." In a letter to Dr. Travers (20th May, 1907) Ramsay says: " I have got lithium from copper for the third time ; and Cameron, one of our students, is repeating so as to give a final check. It will be done in a month and a half, — say by the end of June." The uninitiated will be unable to appreciate the enormous difficulties attending such investigations, the extreme minuteness of the quantities to be dealt with in the endeavour to recognise the products and the practical impossibility of completely excluding impurities derived from the air, the water employed and the surfaces of the glass, silica or metallic vessels necessarily employed. Ramsay himself knew all about this, no one better, and in dealing with the emanation itself when using the WORK ON RADIUM 167 microbalance as already mentioned he was troubled by the condensation of air, and in a letter to Dr. Travers he mentions (27th Nov., 1910) that " All water leaves a weighable residue from a drop, and that introduces fresh difficulties in working on a small scale." This residue is doubtless derived from the atmosphere, if the water has been in contact with ordinary air even for an instant. The position of these interesting speculations is still unsettled. But it may be pointed out that hypothesis has been lavished on the question as to the origin of the known elements. It seems to be generally admitted that they were formed by the condensation, under suitable but probably varying conditions, of one or more primary forms of matter, and that the comparatively stable forms of the condensed material have ranged themselves in groups and series which are summed up in the periodic scheme of Mendeleeff or some modification of it. There seems to be some evidence of the reverse operation proceeding spontaneously in the disintegration of the radio-active substances, and there is surely justi- fication for an attempt to utilise the enormous energy which becomes available in this process in the endeavour to break down the atoms of those common elements which are not appreciably radio-active and which are apparently permanent under conditions now prevailing in this part of the universe. It is true that other experi- menters have not confirmed Ramsay's published state- ments, but in such a field of work it is not surprising 168 SIR WILLIAM RAMSAY that equally skilled operators should arrive at irrecon- cilable results. All that we can now hope for is that when peace once more allows the undisturbed pursuit of experimental investigations, this great problem will be resumed and brought to an incontestable issue. This is not the place to describe with any detail the manufacture or properties of radium and its salts, but the general reader may be reminded that radium is found in uraniferous minerals, of which the most important is pitchblende, the oxide U808. The mineral is, however, very complex, containing small quantities of many metals. In the process of separating the minute quantity of radium present in the mineral, advantage is taken of the fact that the salts of radium closely resemble the salts of barium, and that when a solution containing both metals is mixed with sulphuric acid the precipitated barium sulphate carries down with it the whole of the radium also in the form of sulphate. Radium is sold chiefly in the form of bromide, which is still very expen- sive, owing to the demand for scientific and medical purposes and the very limited supply. It was Sir Lauder Brunton who first suggested the use of radium emanation as a possible curative agent in cases of cancer. Brunton was a very intimate friend of Ramsay's, the acquaintance dating from early school days. There was therefore a double interest which led Ramsay to take steps in the hope of adding to the limited quantity available for the use of the medical profession in this country. When the emanation was WORK ON RADIUM 169 first used all radium had to be procured from Austria. But in 1910 a mine in Cornwall was found near St. Ives, where there was a large heap of residues containing pitchblende. Ramsay began with his private assistant, Mr. Whitehouse, to work out a process, and, after trying it on a small scale, the mining company started a small factory in the east-end of London under the title " The British Radium Corporation." Mr. Whitehouse was appointed chemist, and Ramsay's only son, William George Ramsay, assisted him in the work. Ramsay himself was neither a director nor shareholder, but he acted as chemical adviser, his duties being to visit the works at intervals and test the products. On 7th January, 1911, he was able to say in a letter to Dr. Travers in India, " The radium work is in full swing and turning out more radium than I fancy will easily sell. Still they are getting £20 a mgm. for it. Whitehouse has done it well. The concentration of the ore is the chief problem." The manufacture went on for a year or more, when larger works were taken on the south side of the Thames, but about that time the quality of the ore declined and the output was reduced. The company was ultimately wound up. At about the time that the corporation for the manu- facture of radium commenced operations the Radium Institute for the therapeutic use of radium was founded. At first it was hoped that supplies might have been obtained from British sources, but the corporation and the Institute were entirely unconnected together, and it 170 SIR WILLIAM RAMSAY was not found possible for the former to comply with the requirements of the latter. Negotiations therefore fell through and the Institute got its radium from Austria. A new mineral, having radio-active properties, had been discovered in Ceylon in 1904. It contained a large percentage of thorium oxide, and hence received the name thorianite. On being heated or dissolved in dilute sulphuric acid it gives off a considerable quantity of gas consisting chiefly of helium. Ramsay secured several hundred-weights of this mineral, and with the aid of a chemical manufacturer proceeded to treat it by the process used in the case of pitchblende for the extraction of barium and radium. This part of the product was investigated in Ramsay's laboratory by Otto Hahn. It was found that in separat- ing the radium salt from the barium, the radio-activity became concentrated on the one hand into the least soluble portion containing radium, and on the other into the most soluble portion which was found to con- tain a hitherto unrecognised radio-element to which Ramsay gave the name radiothorium. The facts were published both by Ramsay and Hahn in 1905. Hahn then left London and went to work with Rutherford in xmtreal, having evidently taken some of the same aterial with him. He soon discovered mesoihorium, he parent of radiothorium, and published an account its radio-active properties while keeping the methods of preparation and the chemical properties secret. Meso- WORK ON EADIUM 171 thorium preparations, equal in activity to radium, were soon put on the market in Germany. In 1910 the question of the chemical properties of mesothorium was investigated by Professor Soddy,1 who found that meso- thorium was non-separable from radium. Consequently the radium prepared from thorianite in Ramsay's experi- ments contained the mesothorium. And as meso- thorium gives rise in its radio-active change to radio- thorium the latter becomes associated, in the process of fractionation, with the thorium present from which it is non-separable. The radio thorium obtained by Ramsay and Hahn was therefore a new-born product formed during the process of fractional crystallisation. 1 Transaction* of the Chemical Society, 1911, p. 72. CHAPTER VII LATER YEARS WHEN a man is approaching the age of sixty years he is often supposed to be looking forward with some eagerness to the time when he can retire from active life. In Ramsay's case, however, there was little sign of relaxation so far as the fulfilment of public engage- ments was concerned nor in the active pursuit of scien- tific research. Nevertheless, there were times when he had to acknowledge privately that the pace could not be kept up much longer. He had been within a few years President of the Society of Chemical Industry (1904), President of the Chemical Society (1908 and 1909), President of the International Congress of Applied Chemistry (1909), President of the Chemical Section of the British Association (1897), and President of the Association itself (1911), and each year of office required a presidential address. He had also been to India on official business (1900), and with the Society of Chemical Industry to the St. Louis Exhibition, with an address at the Congress of Arts and Science at St. Louis (1904), to Norway to visit 172 LATER YEARS 173 a mine of radio-active mineral, to lecture in Vienna (1908) at the Association Helvetique at Geneva, at the Associa- tion Fran£aise (1908), and at the Sorbonne. He was a member of the Sewage Commission also, which involved many journeys of inspection beside laboratory work at home. These and many other engagements were fulfilled while continuing his teaching and research at University College. The Sewage Commission began operations in 1897 under the chairmanship of the Earl of Iddesleigh, the other members, beside Ramsay, being Sir Richard Thome Thome and General Phipps Carey (representing the Local Government Board), Mr. C. P. Cotton (Irish L.G.B.), Sir Michael Foster, F.R.S., Colonel T. W. Harding (West Riding Rivers Board), Mr. P. W. Killick (Mersey and Irwell Rivers Board), and Dr. J. B. Russell (Scottish L.G.B.). The commission was at work up to the time when its operations were suspended at the outbreak of war in August 1914. On the death of Sir Michael Foster in 1907, Ramsay, in a letter, reminds his friend Dr. McGowan that no fewer than five members of the Commission had already been removed by death ; there were consequently a good many changes in the course of its existence. The staff employed consisted of Professor Sir R. Boyce (who died while the Com- mission was sitting) and Dr. A. C. Houston as bacter- iologists ; Dr. George McGowan and Mr. Colin C. Frye as chemists ; with Mr. G. B. Kershaw as engineer. There were also a good many assistants, bacteriological and 174 SIR WILLIAM EAMSAY chemical, and some ten reports were drawn up. In fairness it should be stated that one of the Appendices contained an account of the work " On the Pollution of Estuaries and Tidal Waters," by Dr. W. E. Adeney and Professor Letts, and that Dr. Adeney's original work, done before the Commission came into existence, was of fundamental importance and was only extended and amplified by the investigations made by the Com- mission. Obviously the membership of such a body could be no sinecure, and Ramsay in characteristic manner took a very active part in all the pro- ceedings, which spread, as already indicated, over the long period of 16 to 17 years. He was greatly dis- appointed that no permanent body was established to continue enquiry, supply information, and make regulations bearing on the many important questions involved. In 1904 Ramsay became President of the Society of Chemical Industry, a body consisting of about 5000 members and having a section established in New York. The opening session of the annual meeting was held on this occasion in the Columbia University, New York, commencing on September 8th, but the president and a large number of members proceeded afterwards to Philadelphia, Washington, Pittsburg, St. Louis (where they visited the exhibition), Chicago, Detroit, Niagara and Buffalo, and finally Boston. On October 5th Ramsay returned to England by the S.S. Baltic. Any one who has had experience of American enthusiasm LATEE YEAES 175 and hospitality, will feel his remark justified, when in a letter he wrote, " I had a very hard time, amusing enough, but at it from dawn till midnight, and often two speeches a day of the after-dinner type to the same audience for the most part. It was difficult to keep cheerful and lively under the circumstances." The subject of his address to the Society was the " Education of a Chemist, and on some suggestions as to methods and practices by which science and scientific men may be made more serviceable to industry." With regard to the training which should be provided for young men who propose to become scientific or technical chemists, he believed that what he called the inventive spirit can be developed in most of them. That is to say, the training in methods of research and the culti- vation of this attitude of mind is best effected by example. With this end in view every teacher from the senior professor to the youngest assistant must be occupied in research. Beginners, however, should be taught by themselves and should not begin research practically till after a preliminary year spent in analysis in making preparations and in physical operations. Above all there must not be too much teaching. The essence of scientific progress is the well-worn method of trial and failure. A little time is no doubt lost at first, but the ultimate rate of progress is much more rapid. The junior staff in a school or college ought to be encouraged to do research, and their duties should be so arranged as to afford time and facilities for such work. These 176 SIR WILLIAM KAMSAY are the men who after a few years should readily find employment as works chemists. As to the professor, he should know what every man in the laboratory is doing, and it is obvious therefore that the number of workers he can supervise is limited ; Ramsay put the number at 40 or 50. Of course there is nothing to prevent his lecturing to a much larger number. The greater part of his time should be given to research, and this consideration leads to a review of the methods of selecting among candidates for such appointments, and generally to the government of universities. He then proceeded to discuss the question to whether graduates only should be made assistants. ''' The older I get the less I believe in university degrees [as a test of capacity." This utterance is obviously connected with his objection to examinations which are here reiterated. The address at St. Louis was entitled " Present Problems of Inorganic Chemistry," and was printed in full by the Smithsonian Institution. He therein declares that " the fundamental task of inorganic chemistry is still connected with the classification of elements and compounds. . . . What- ever changes in our views may be concealed in the lap of the future, the great generalisation due to Newlands, Lothar Meyer and Mendeleeff will always retain a place, perhaps the prominent place, in chemical science. Now it is certain that no attempt to reduce the irregular regularity of the atomic weights to a mathematical expression has succeeded ; and it is, in my opinion, very unlikely that any LATER YEARS 177 such expression, of not insuperable complexity, and having a basis of physical meaning, will ever be found. I have already, in an address to the German Association at Cassel, given an outline of the grand problem which awaits solution. It can be shortly stated then : While the factors of kinetic and of gravita- tional energy, velocity, and momentum on the one hand and force and distance on the other are simply related to each other, the capacity factors of other forms of energy — surface in the case of surface energy ; volume in the case of volume energy ; en- tropy for heat ; electric capacity when electric charges are being conveyed by means of ions ; atomic weight when chemical energy is being gained or lost — all these are simply connected with the fundamental chemical capacity, atomic weight or mass. The periodic arrangement is an attempt to bring the two sets of capacity factors into a simple relation to each other, and while the attempt is in so far a success, inasmuch as it is evident that some law is indicated, the divergences are such as to show that finality has not been attained. The central problem in inorganic chemistry is to answer the question, Why this incom- plete concordance ? " This question still remains incompletely answered notwithstanding the important advances which have resulted from the observations, especially of Soddy, Fajans, Fleck and Russell, on the existence and pro- perties of isotropic elements, that is, of elements which are not identical as to atomic weight though occupying the same place in the periodic scheme and are not separable by chemical means from one another. Two \ varieties of lead, for instance, exist in nature. The skill of the best workers on atomic weights has thus been severely tested. There are many other questions raised in this address 178 SIR WILLIAM RAMSAY of Ramsay's, some of which he would no doubt have stated somewhat differently at a later date in view of the extension of knowledge which has taken place in the twelve years which have elapsed since the lecture at St. Louis. It was in the same year 1904 that Ramsay received the Nobel prize for chemistry in the same year that the Nobel prize for physics was awarded to Lord Ray- leigh. It is perhaps appropriate to recall the fact that names may be submitted to the Nobel Committee of the Swedish Academy only by a strictly limited number of persons, and a statement of the claims of the person whose name is proposed involves the preparation of a carefully considered document. There can be no impro- priety now in mentioning that Ramsay's name was proposed to the Swedish Committee by Lord Avebury, as a member of the Swedish Academy, and the proposal was supported by the signatures of the leading English chemists. But it is probably not known generally in this country that a separate and entirely independent proposal was sent in to the Academy by Professor B. Brauner, of Prague. The statement drawn up by Professor Brauner occupied nine foolscap pages, and gives evidence of the characteristic enthusiasm of its author. Naturally he lays particular stress on " the discovery of one whole missing group of elements in the periodic system of Mendeleeff and the production of helium from or through the radium emanation." LATER YEARS 179 A letter from Stockholm, dated 9th December, to Mr. Fyfe gives an interesting account of the journey thither. " We left London the day before yesterday only, and it is as if we had been away for months. The North Sea was mizzly, grey, but calm. We saw the Dutch sabots and bunchy petti- coats by lamplight as we reached Flushing : then we dined on the train, took our sleeper and slept through Germany, getting to Altona near Hamburg at 7.30 a.m. Then we ate and admired a huge statue of two horse-men fighting for the possession of a fish. Then to Kiel, which we reached in an hour and a half and found in brilliant sunshine. There are huge ship-building yards covered in with glass, and they are busy, evidently. We sailed to Korsor in Denmark, a sail of about five hours. We counted at once 28 German men-of-war, cruisers and torpedo boats, and we saw at least another 20 in the harbour. There wasn't another boat, not even a fishing boat, in sight. What is all this for ? To guard commerce ? There wasn't a sign of it. But the Baltic canal is now ready, and this is a nice little pond to man- oeuvre in when there is nobody to look on. The ships were evidently doing something, signalling with flags, putting about and about and up to some game. But, of course, we couldn't understand the game. Was it practising for a future meeting with England ? We had brilliant weather, cold, but a warm sun. About 3.30 we got into narrower waters and saw Denmark on both sides. Then into the train at Korsor, and in two hours we were in Copenhagen. In these parts it gets dark at about 4.30, so we saw little of Copenhagen during our drive — a long one — to the next boat ; for we crossed to Malmo in Sweden in the funniest boat I ever saw. It carried two lines of rails laden with trucks. And we had a meal of sorts, the table loaded with food but no waiters, and people crowded round, so that we had to ask for all we wanted, — cold meat, cold fish and what they call 180 SIR WILLIAM RAMSAY Delicatessen in Germany, i.e. pickles, salt fish, jam, ham, sausages, etc. We filled up, however, and stood on a gangway above the trucks and looked at the lights of Malmo. Then a second night in a sleeper, quite comfortable except that it was so warm that we opened the window, and next morning, i.e. this morning (but it looks a week ago), there was 6 inches of snow on the foot of my bed ! We passed through very pretty country this morning, broken and full of lakes, birch trees and red wooden houses. The lakes were all frozen and people sledging on them. Then at 9.30 Stockholm. M. made me invest in a lordly fur coat, and it was welcome here, for the thermometer is a long way on the wrong side of freezing. There was a deputation to meet us and put us on our way to the hotel. . . . Here we found Lord Rayleigh, who left the evening before we did ; and also another prize-winner, a Russian physiologist named Pavloff, with his wife. . . . We have been driven all over Stockholm to-day by a celebrated mathematician, Mittag-Leffler, a great friend of the Russian mathematical girl who made a great stir some years ago. To-morrow the ceremony takes place. ... I believe we get our prizes from the hand of the king, and that he is to be at our dinner party to-morrow. It begins at 10.30 p.m. Good- ness knows when it will end. However, it will be a thing to remember." From Stockholm the Ramsays went to Kandersteg in Switzerland, and on 27th December he wrote to the same friend as follows : " We had a most gorgeous time for nearly a week, dining with all the celebrities, including old King Oscar. The old gentleman was very kindly and took Lord R. and me into his private room and showed us all his curiosities, the portraits of his sons when they were children and his reliques of Gustavus Adolphus and of Charles XII. The Crown Prince told Mag that it was a difficult job to be a king, thereby confirming the Swan of Avon. He said • :: •: si s;u Trui; ACS U ^/ " A. - —2—Zsfj^f) & ' .-/^sfa ^sLUZ^, ^7T^C r