Adjudication of the Medals of the Royal Society for the year 1882 , 
by the President and Council. 
The Copley Medal to Professor Arthur Cayley, F.R.S., for his numerous 
profound and comprehensive researches in Pure Mathematics. 
A Royal Medal to Professor William Henry Flower, F.R.S., for his valuable 
contributions to the morphology and classification of the Mammalia, and to Anthro- 
‘pology. 
A Royal Medal to Lord Rayleigh, F.R.S., for his various Papers in Mathematical 
and Experimental Physics. 
The Rumford Medal to Captain William de Wiveleslie Abney, F.R.S., for his 
Photographic Researches and his discovery of the method of photographing the less 
refrangible part of the spectrum, especially the infra-red region, also for his Researches 
on the absorption of various compound bodies in this part of the spectrum. 
The Davy Medal to D. Mendelejeff and Lothar Meyer, for their discovery of 
the periodic relations of the atomic weights. 
The Bakerian Lecture “ On the Chemical Theory of Gunpowder,’’ was delivered by 
Dr. Debus, F.R.S. 
The Paper “ On the Rhythm of the Heart of the Frog, and on the nature of the 
Action of the Vagus Nerve,” by Mr. W. H. Gaskell, was appointed as the Croonian 
Lecture. 
