William Ramsay's correspondence and papers, vol. 7: The discovery of argon (part 2) Volume 7/2 of William Ramsay's correspondence and papers, as compiled by his former assistant, Morris W. Travers, following Ramsay's death. The contents of the volume are as follows: Pages 145-261: Correspondence and papers, including photostats of extracts from Ramsay’s laboratory notebooks. (September 1894 – January 1995) Page 202: James Dewar’s ‘The relative behaviour of chemically prepared and of atmosphere nitrogen in the liquid state’. The contents of this volume are listed in greater detail in item RAMSAY/18. 1894-[1957]