481 



The KEITH PRIZE having been irregularly announced, this op- 

 portunity is taken of laying before the Members of the Royal Society, 

 in a separate form, the several awards, by the Council, of this Prize, from 

 its institution to the present period, viz. : — 



On 7th January 1828, io Dr Brev/ster, for his papers on his Discovery 

 of two new Invisible Fluids in the Cavities of certain Minerals, 



On 6th May 1833, to Mr Thomas Graham of Glasgow, for his Disco- 

 very of the Law of Diffusion of the Gases. 



On 6th January 1834, to Sir David Brewster, for his paper on a New 

 Analysis of Solar Light. 



On 18th January 1836, to Professor Forbes, for his paper " On the 

 Refraction and Polarization of Heat." 



On 19th March 1838, to John Scott Russell, Esq., for his Re- 

 searches on Hydrodynamics. 



On 2d March 1840, to John Shaw, Esq., for his Experiments on the 

 Development and Growth of the Salmon. 



On 18th March 1844, to Professor Forbes, for his papers on Glaciers. 



