OUtuarif. 383 



by accurate drawings representing both the species and the details 

 necessary for its determination. In this way Rousselet set an 

 excellent example to the band of workers he gathered round him. 

 His method of preservation and mounting is perhaps more widely 

 known than his descriptive work ; and the process of " narcotizing " 

 which he introduced, or some modification of it, is now practised 

 in all laboratories where biological work is in progress. His last 

 ])aper, " Some Further Notes on Collecting and Mounting Eotifera," 

 was published in Vol. 13, Journal of the Quekett jMicroscopical 

 Club, p. 321 (October 23, 1917), where a bibliography is given of 

 his various papers in this subject, in which he achieved such 

 marked success. 



He was elected to the Fellowship of the Royal Microscopical 

 Society in 1888, and served for many years on the Council. In 

 January 1898 he was appointed Honorary Curator, and in this 

 capacity his knowledge of the history of the microscope enabled 

 him to render valuable service to the Society in the preparation of 

 the Catalogue of the Collection of Instruments. He held office 

 until December 1918, when increasing physical distress compelled 

 him to relinquish the work. In January 1917 Mr. Eousselet 

 presented to the Society an extensive collection of reprints, etc., 

 which he had received from his many correspondents in all parts 

 of the world. These papers, numbering about a thousand, form 

 probably the most valuable collection of papers on the Eotifera 

 available to workers for reference in this country. 



A. W. Sheppard. 



