PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
VOL. VIII. 
1874-75. 
No. 90. 
Ninety-Second Session. 
Monday , 23 d November 1874. 
Sir WILLIAM THOMSON, President, in the Chair. 
The following Council were elected 
President. 
Sir WILLIAM THOMSON, Knt., LL.D. 
Honorary Vice-Presidents. 
His Grace the DUKE of ARGYLL. 
Sir ROBERT CHRISTISON, Bart., M.D. 
Vice-Presidents. 
Sir W. Stirling-Maxwell, Bart. [ Rev. W. Lindsay Alexander, D.D. 
David Milne Home, LL.D. David Stevenson, Esq., C.E. 
Professor Kelland. | The Hon. Lord Neaves. 
G-eneral Secretary — Dr John Hutton Balfour. 
Secretaries to Ordinary Meetings. 
Professor Tait. 
Professor Turner. 
Treasurer — David Smith, Esq. 
Curator of Library and Museum — Dr Maclagan. 
Councillors. 
Professor Lister. 
George Robertson, Esq., C.E. 
The Right Rev. Bishop Cotterill. 
Professor A. Crum Brown. 
Dr Arthur Mitchell. 
George Forbes, Esq. 
VOL. VIII. 
Principal Sir Alex. Grant, Bart. 
Professor Geikie. 
Dr Andrew Fleming, H.M.I.S. 
Dr Charles Morehead. 
Alexander Buchan, A.M. 
Robert Wyld, Esq. 
3 ii 
