APPENDIX — KEITH, BRISBANE, NEILL, AND GUNNING PRIZES. 941 



3rd Triennial Period, 1890-93. — Alexander Buchan, Esq., LL.D., for his varied, extensive, and 



extremely important Contributions to Meteorology, many of 

 which have appeared in the Society's Publications. 



4th Triennial Period, 1893-96. — John Aitken, Esq., for his brilliant Investigations in Physics, 



especially in connection with the Formation and Condensation 

 of Aqueous Vapour. 



1st Quadrennial Period, 1896-1900. — Dr T. D. Anderson, for his discoveries of New and 



Variable Stars. 



2nd Quadrennial Period, 1900-04. — Sir James Dewar, LL.D., D.C.L., F.R.S., &c, for his 



researches on the Liquefaction of Gases, extending over the 

 last quarter of a century, and on the Chemical and Physical 

 Properties of Substances at Low Temperatures : his earliest 

 papers being published in the Transactions and Proceedings 

 of the Society. 



