504 Proceedings of Boy al Society of Edinhurgh. [sess. 
2. On an observed Eelation between tbe Carbonic Acid and the 
added Moisture in the Air of Inhabited Kooms. By Charles Hunter 
Stewart, B.Sc., M.B. From the Public Health Laboratory of the 
University of Edinburgh. 
3. Approximate Determination of the Path of a Kotating Spherical 
Projectile. By Professor Tait. T. xxxvii. 427. 
4. Graphic Process for the Attraction of a Solid of Eevolution on 
a Particle in its Axis. By G. Eomanes, Esq. Communicated by 
Professor Tait. 
Monday, l^th June 1893. 
The Hon. Lord M‘Laren, Vice-President, in the Chair. 
Dr James E. Talmage, Curator of the Deseret Museum, Salt Lake 
City, Utah, exhibited Crystals of Selenite of extraordinary size and 
purity from the County of Wayne in Southern Utah. The occurrence 
of these Crystals has been described by Dr Talmage in Science, 
vol. xxi. (No. 524), pp. 85-87, New York, Feb. 1893. Dr Talmage 
presented two very beautiful specimens to the Society, and was thanked 
for his communication and for the specimens by the Chairman. 
The following Communications were read : — 
1. Obituary Notice of Professor James Thomson. By Professor Tait. 
2. Obituary Notice of Professor Dittmar. By Professor Crum Brown, 
F.R.S. P. XX. hi. 
3. On the Physical Geography of the Clyde Sea Area. Part III. 
Temperature. By Dr H. R. Mill. T. xxxviii. 1. 
Monday, 2>rd July 1893. 
Professor James Geikie, F.R.S. , Vice-President, in the Chair. 
An invitation, to Fellows, to attend the Adelaide Meeting of the 
Australasian Association for the Advancement of Science, was read. 
The following Communications were read : — 
1. On the Chemical Composition of Sea Water. By John Gibson, 
Ph.D., Professor of Chemistry in the Heriot-Watt College. P. xx. 315. 
2. On the Hourly Variation of the Rainfall at Ben Nevis Observatory. 
By Alexander Buchan, LL.D. 
3. On the Path of a Rotating Spherical Projectile, II. By Professor 
Tait. T. xxxvii. 427. 
4. An Experimental Study of Intra-ocular Therapeutics. By Dr 
Chasseaud. Communicated by Dr Noel Baton. 
The following Candidate for Fellowship was balloted for, and 
declared duly elected a Fellow of the Society : — 
The Rev. John M‘Murtrie, M.A., D.D. 
