CONTENTS. 
Opening Address, Session 1866-67. By Sir David Brewster, 
President, ........ 2 
Donations to the Library, . . . . . .37 
Influence of Marriage on the Death-Rates of Men and Women in 
Scotland. By James Stark, M.D., . . . .49 
On the Physiological Action of the Calabar Bean ( Physostigma venc- 
nosum, Balf.) By Thomas R. Fraser, M.D., . . .51 
On some Phenomena of Indistinct Vision. By Edward Sang, Esq., . 58 
Donations to the Library, . . . . . .61 
Experiments on Animal Electricity. By Dr Hughes Bennet, . 63 
On the Colours of the Soap-Bubble. By Sir David Brewster, K.IT., 
F.R.S., 64 
On the Musculus Sternalis. By William Turner, M.B., Demonstra- 
tor of Anatomy, . . . . . . .65 
On Compensation Pendulums of two Pieces. By Edward Sang, Esq., 67 
Donations to the Library, . . . . . .70 
On the Tertiary Volcanic Rocks of the British Islands. By Archibald 
Geikie, Esq., F.R.S., . . . . . .71 
Note on the Action of Ammonia on Dichloracetone. By Dr A. Crum 
Brown, . . . . . . . .75 
On the Figures of Equilibrium of Liquid Films. By Sir David 
Brewster, K.H., F.R.S., . . . . . .76 
On a Method of ascertaining the Specific Gravity of Water which 
holds a minute quantity of Foreign Matter in Solution ; or, on the 
Specific Gravity of Impure Water. By Edward Sang, Esq., . 78 
On the Oxidation of Phenyl Alcohol, and a Mechanical Arrangement 
adapted to illustrate Structure in the Non-saturated Hydrocarbons. 
By J. Dewar, Esq. Communicated by Professor Playfair, . 82 
Donations to the Library, . . . . . .86 
On an Application of Mathematics to Chemistry. By Dr A. Crum 
Brown, . . . . . . . .89 
Notice of an Easy Method of Preparing Nitroprussides. By Dr Lyon 
Playfair, F.R.S., 90 
Note on the Reality of the Roots of the Symbolical Cubic which ex- 
presses the Properties of a Self-conjugate Linear and Vector Func- 
tion. By Professor Tait, . . . . .92 
On Vortex Atoms. By Professor Sir William Thomson, . . 94 
Donations to the Library, . . . . . .105 
On the Arctic Shell Clay of Elie and Errol, viewed in connection with 
our other Glacial and more Recent Deposits. By the Rev. Thomas 
Brown, ........ 107 
