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 OscarPresidential 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 



