AWARDS OF THE KEITH PRIZE SINCE 1845. 



(Continued from Transactions, Vol. XVI., page iii.) 



10th Biennial Period, 1845-47. General Sir Thomas Brisbane, Bart., for the Maker- 



stoun Observations on Magnetic Phenomena, made at 

 his expense, and published in the Society's Trans- 

 actions.* 



11th Do. 1847-49. Not awarded. 



12th Do. 1849-51. Professor Kelland, for his papers on General Differ- 



entiation, including his more recent communication 

 on a process of the Differential Calculus, and its 

 application to the solution of certain Differential 

 Equations. 



13th Do. 1851-53. W. J. Macquorn Rankine, Esq., for his series of 



papers on the Mechanical Action of Heat. 



14th Do. 1853-55. Dr Thomas Anderson, for his papers on the Crys- 



talline Constituents of Opium, and on the Products 

 of the Destructive Distillation of Animal Substances. 



* A Silver Medal, bearing the head of Napier on one side, and a suitable inscription on the other, was at 

 the same time awarded to Mr John Allan Broun, under whose immediate direction these Observations were 

 made. 



