IV 
Contents. 
PAGE 
On the Carboniferous Volcanic Rocks in the Basin of the Firth of 
Forth — their Structure in the Field and under the Microscope. 
By Professor Geikie, F.R.S., . . . . .65 
Exhibition of Specimens of Auriferous Quartz from the Leadhills 
District. By Patrick Dudgeon, Esq. of Cargen, . . .67 
On some Physiological Results of Temperature Variation. By J. B. 
Hay craft, M.B., C.M. Communicated by Professor Turner, . 68 
On the Elasticity of the Walls of the Arteries and Veins. By Dr 
Roy. Communicated by Dr George W. Balfour, . . 68 
Further Note on the Distribution of Temperature under the Ice in 
Linlithgow Loch. By J. Y. Buchanan, M.A., . . .68 
Heating and Ventilating of Churches and other Buildings : Report 
of a series of Experiments made in a Hall in Upper Grove Place. 
By Charles J. Henderson, Edinburgh. Communicated by Pro- 
fessor Jenkin, . . . . . . .72 
Chapters on the Mineralogy of Scotland. Chapter VI. “ Chloretic 
Minerals.” By Professor Heddle, . . , .76 
On Deep-Sea Thermometers.' By J. Y. Buchanan, . . .77 
Preliminary Note on a Crystalline Compound formed in Water con- 
taining Sulphuretted Hydrogen and Mercaptan in Solution. By 
J. Adrian Blaikie, B.Sc., . . . . .87 
Laboratory Notes. By Professor Tait — 
(1.) Measurements of the Electromotive Force of the Gramme 
Machine at different Speeds, . . . .90 
(2.) On the Law of Extension of India-rubber at different 
Temperatures, . . . . . .92 
Election of Four Foreign Honorary Fellows, . . . .92 
On Gravitational Oscillations of Rotating Water. By Sir William 
Thomson, . ...... 92 
On the Effects of Chloroform, Ethidene Dichloride, and Ether on 
Blood-Pressure. By Joseph Coats, M.D., William Ramsay, Ph.D., 
and John G. M ‘Kendrick, M.D., University of Glasgow. Com- 
municated by Professor M‘Kendrick, .... 100 
Experiments with Rotating Discs. By John Aitken. Communi- 
cated by Professor M‘Kendrick, . . . . .102 
General Theorems on Determinants. By Thomas Muir, M.A., . 102 
Preliminary Note on Alternants. By Thomas Muir, M.A., . .102 
Professor Geddes’s Theory of the “ Iliad.” By Professor Blackie, . 103 
The Principles of the Algebra of Logic. Part III. — Application to 
certain Problems in the Theory of Probability. By Dr Alexander 
Macfarlane, . . . . . . . .105 
The Anatomy of the Northern Beluga (B. Catodon ) compared with 
that of other Whales. By Morrison Watson, M.D., and Alfred 
H. Young, M.B., &c., Owens College, Manchester, ^ . 112 
Fifth Report of the Boulder Committee. By D. Milne Home, 
LL.D., . . . . . . . .113 
Notes by William Jolly, Inverness, on the Transportation of Rocks 
found on the South Shores of the Moray Firth, . . . 178 
