PROCEEDINGS OF 



THE ROYAL SOCIETY. 



Section B. — Biological Sciences. 



Address of the President, Prof. C. S. Sherrington, at the 

 Anniversary Meeting, November 30, 1921. 



Since the last Anniversary Meeting the roll of the Society has lost by 

 death fifteen Fellows and one Foreign Member : 



The Anniversary Meeting affords appropriate opportunity for some spoken 

 reference to them. 



The earliest loss was that of William de Wiveleslie Abney, a Fellow of 

 the Society for upwards of forty years. Much of his scientific work may be 

 summarised as being the establishment, by experiment, of photography as a 

 science. With Sir William Abney photography was not merely a means but 

 in itself a scientific end. The building of the image both in the wet and 

 in the dry plate were successfully studied by him. He was a pioneer in 

 the photography of the infra-red region of the spectrum. He suggested 

 more than forty years ago the charging of carbons with calcium salts to 

 enhance the arc-light beam, the flame arcs of to-day. Later he passed, 

 so to say, from the photographic plate to the retina and investigated the 

 relative visual intensity of different portions of the spectrum. As Advisor 



VOL. XCIII. — B. B 



Sir William Abney. 

 Mr. Spencer Pickering. 

 Dr. A. Muirhead. 

 Sir Lazarus Fletcher. 

 Prof. W. Odling. 

 Prof. L. C. Miall. 

 Prof. E. B. Clifton. 



Lord Moulton. 

 Prof. A. W. Keinold. 

 Prof. E. J. Mills. 

 Colonel J. Herschel. 

 Mr. G. W. Walker. 

 Dr. H. Woodward. 

 The Earl of Ducie. 



Dr. F. A. Bainbridge. 



On the Foreign List 



Prof. G. Lippmann. 



