APPENDIX— KEITH, BRISBANE, NEILL, AND GUNNING PRIZES. 931 



11th Biennial Period, 1878-80. — Professor Piazzi Smyth, Astronomer-Royal for Scotland, for his 



paper "on the Solar Spectrum in 1877—78, with some 

 Practical Idea of its probable Temperature of Origination," 

 published in the Transactions of the Society. 



12th Biennial Period, 1880-82. — Professor James Geikie, for his "Contributions to the Geology of 



the North- West of Europe," including his paper " on the 

 Geology of the Faroes," published in the Transactions of the 

 Society. 



13th Biennial Period, 1882-84. — Edward Sang, Esq., LL.D., for his paper "on the Need of 



Decimal Subdivisions in Astronomy and Navigation, and on 

 Tables requisite therefor," and generally for his Recalculation 

 of Logarithms both of Numbers and Trigonometrical Ratios, 

 — the former communication being published in the Pro- 

 ceedings of the Society. 



14th Biennial Period, 1884-86. — John Murray, Esq., LL.D., for his papers "On the Drainage 



Areas of Continents, and Ocean Deposits," " The Rainfall of 

 the Globe, and Discharge of Rivers," " The Height of the Land 

 and Depth of the Ocean," and " The Distribution of Tem- 

 perature in the Scottish Lochs as affected by the Wind." 



15th Biennial Period, 1886-88. — Archibald Geikie, Esq., L.L.D., for numerous Communications, 



especially that entitled " History of Volcanic Action during 

 the Tertiary Period in the British Isles," published in the 

 Transactions of the Society. 



16th Biennial Period, 1888-90. — Dr Ludwig Becker, for his paper on "The Solar Spectrum at 



Medium and Low Altitudes," printed in Vol. XXXVI. 

 Part I. of the Society's Transactions. 



17th Biennial Period, 1890-92. — Hugh Robert Mill, Esq., D.Sc.,for his papers on "The Physical 



Conditions of the Clyde Sea Area," Part I. being already 

 published in Vol. XXXVI. of the Society's Transactions, 



18th Biennial Period, 1892-94. — Professor James Walker, D.Sc, Ph.D., for his work on Physical 



Chemistry, part of which has been published in the Pro- 

 ceedings of the Society, Vol. XX. pp. 255-263. In making 

 this award, the Council took into consideration the work 

 done by Professor Walker along with Professor Crum Brown 

 on the Electrolytic Synthesis of Dibasic Acids, published in 

 the Transactions of the Society. 



19th Biennial Period, 1894-96. — Professor John G. M'Kendrick, for numerous Physiological 



papers, especially in connection with Sound ; many of which 

 have appeared in the Society's publications. 



20th Biennial Period, 1896-98. — Dr William Peddie, for his papers on the Torsional Rigidity 



of Wires. 



2 1st Biennial Period, 1898-1900. — Dr Ramsay H. Traquair, for his paper entitled "Report on 



Fossil Fishes collected by the Geological Survey in the 

 Upper Silurian Rocks of Scotland," printed in Vol. 

 XXXIX. of the Transactions of the Society. 



22nd Biennial Period, 1900-02. — Dr Arthur T. Masterman, for his paper entitled "The Early 



Development of C7%brella oculata (Forbes), with remarks on 

 Echinoderm Development," printed in Vol. XL. of the Trans- 

 actions of the Society. 



23rd Biennial Period, 1902-04. — Mr John Dougall, M.A., for his paper on "An Analytical 



Theory of the Equilibrium of an Isotropic Elastic Plate," 

 published in Vol. XLI. of the Transactions of the Society. 



24th Biennial Period, 1904-06. — Jacob E. Halm, Ph.D., for his two papers entitled "Spectro- 

 scopic Observations of the Rotation of the Sun," and " Some 

 Further Results obtained with the Spectroheliometer," and 

 for other astronomical and mathematical papers published in 

 the Transactions and Proceedings of the Society within the 

 period. 



