506 
Proceedings of Royal Society of Edinburgh. 
Rev. J. Sutherland Black, M.A. 
Robert Kidston, Esq., F.G.S. 
Professor John Gibson, Ph.D. 
Professor James Blyth, M.A. 
Professor D’Arcy Thompson. 
Professor J. Shield Nicholson. 
Professor Chrystal, LL.D. 
Dr J. Batty Tuke, F.R.C.P.E. 
Alexander Bruce, M.A., 
F.R.C.P.E. 
Professor Frederick 0. Bower, 
M.A., F.R.S. 
Professor J. G. M‘Kendrick, LL.D., 
F.R.S. 
A. Beatson Bell, Esq. , Advocate. 
Ordinary Members of Council. 
Dr 
By a Resolution of the Society (19th January 1880), the following Hon. 
Vice-Presidents, having filled the office of President, are also Members of the 
Council : — 
His Grace the DUKE of ARGYLL, K.G., K.T., LL.D., D.C.L. 
The Right Hon. LORD MONCREIFF of Tulliebole, LL.D. 
The Right Hon. LORD KELVIN, LL.D., D.C.L., P.R.S., Foreign 
Associate of the Institute of France. 
Monday y 4=th December 1893 . 
Professor Copeland, Astronomer-Royal for Scotland, 
Vice-President, in the Chair. 
The following Communication was read : — 
On Bistratification in the Growth of Languages, with special reference 
to Greek. By Emeritus Professor Blackie. T. xxxvii. 615. 
The following Candidates for Fellowship were balloted for, and 
declared duly elected Fellows of the Society : — 
The Rev. Thomas Hardie Turnbull. 
Mr James Macdonald. 
Monday, ISth December 1893 . 
The Rev. Professor Duns in the Chair. 
The following Communications were read : — 
1. Note on the Focus of Concavo-convex Lenses, the Surfaces of which 
are of Equal Curvature. By Dr George Berry, F.R.C.S. P. xx. 192. 
2. On Torsional Oscillations of Wires. By Dr William Peddie. 
3. On certain Electrical Properties of Iron Occluding Gases. By Mr 
S. Kimura, Graduate in Physical Science of the Imperial University of 
Tokyo, Japan. Communicated by Professor C. G. Knott. P. xx. 203. 
4. The Ether — an Idea of Sir John Herschel Modernised. By Mr 
S. Tolver Preston. Communicated by Professor C. G. Knott. 
