Adjudication of the Medals of the Royal Society for the year 1873 by 
the President and Council. 
The Copley Medal to Professor Hermann Ludwig Ferdinand Helmholtz, For. 
Memb. R.S., for his Researches in Physics and Physiology. 
A Royal Medal to Professor George James Allman, F.R.S., for his Researches in 
Zoology, and especially for his Memoirs on the Structure, Development, and Physiology 
of the Gymnoblastic Hydroids. 
A Royal Medal to Professor Henry Enfield Roscoe, F.R.S., for his various 
Chemical Investigations, especially for those on the Chemical Action of Light, and 
upon the element Vanadium and its combinations. 
The Bakerian Lecture was delivered by the Earl of Rosse, F.R.S. : it was entitled 
“ On the Radiation of Heat from the Moon, the Law of its Absorption by our Atmo- 
sphere, and its Variation in Amount with her Phases.” 
The Croonian Lecture was delivered by Benjamin Ward Richardson, M.D., F.R.S. : 
it was entitled “ On Muscular Irritability after Systemic Death.” 
