Adjudication of the Medals of the Royal Society for the year 189(1, 
by the President and Council. 
The Copley Medal to Carl Gegenbaur, For.Mem.R.S., foL- his life-long 
Researches in Comparative Anatomy in all branches of the Animal Kingdom, but 
chiefly in the History of the Vertebrate Skeleton, as also on account of bis Teaching 
and Influence in reference to a large proportion of Contemporary Anatomists. 
The Rumford Medal to Philipp Lenard and to Wilhelm Conrad Rontgen for 
their Investigations of the Phenomena produced outside a Highly Exhausted Tube, 
through which an Electrical Discharge is taking place. 
A Royal Medal to Charles Vernon Boys, F.R.S., lor his Invention of Quartz 
Fibres and Investigation of their Properties, his Improvement of the Radio-Micro¬ 
meter and Investigations with it, for Developments in the Art of Instantaneous 
Photography, and for his Determination of the Value of the Constant of Attraction. 
A Royal Medal to Sir Archibald Geikte, F.R.S., for his many Original 
Contributions to Geology, especially those upon the Old Red Sandstone of Western 
Europe, and the Carboniferous and Tertiary Volcanic Recks of the British Isles. 
The Davy Medal to Henri Moissan for the Isolation of Fluorine, and the Use of 
the Electric Furnace in the Preparation of Refractory Metals and their Compounds. 
The Darwin Medal to Giovanni Battista Grassi for his Researches on the 
Life-history and Societies of the Termitidie, and on the Developmental Relationship 
between Leptocephalus and the Common Eel and other Mursenidse. 
The Bakerian Lecture, “ On the Diffusion of Metals,” was delivered by W. C. 
Roberts-Austen, C.B., F.R.S. 
The Croonian Lecture, “ Observations on Isolated Nerve,” was delivered by 
Augustus D. Waller, M.D., F.R.S. 
mdcccxcvi.—A. 
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