445 
of Edinburgh, Session 1874-75. 
As a consequence, a planet of the earth’s mean density and 
the above assumed tensile strength is held together as much by 
cohesion as by gravitation if its radius is ^25 415 ^ ^ ie 
earth, or about 25 miles. If of steel’s tenacity it would have a 
radius of about 409 miles. 
Monday , 4 th January 1875. 
Sir WILLIAM THOMSON, President, in the Chair. 
The President exhibited and described his Tide Calculat- 
ing Machine, also his Improved Tide-Gauge; he also de- 
scribed certain Capillary Phenomena, with Experiments. 
The following Gentlemen were elected Fellows of the 
Society : — 
C. H. Millar, Esq. 
John Milroy, Esq. 
Professor Daniel Wilson, Toronto. 
Anderson Kirkwood, LL.D. 
Dr Ludwik Bernstein. 
Daniel G. Elliot, Esq., New York. 
Robert Gray, Esq. 
William Craig, M.D., F.R C.S.E. 
Monday, 18 th January 1875. 
The Hon. Lord NEAVES, Vice-President, in the Chair. 
The following Obituary Notices of Deceased Fellows of 
the Society were read : — 
1. Biographical Notice of Lord Colonsay. By the Hon. 
Lord Neaves. 
By the death of Lord Colonsay, this Society has lost a member 
of great distinction, and well worthy of being held in respectful 
remembrance. He was a man of great vigour of mind, and with 
powers and qualities which would have earned for him a high place 
