PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
vol. viii. 1873-74. No. 87. 
Ninety-First Session. 
Monday, 24 th November 1873. 
Sir BOBERT CHRISTISON, Bart., 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. 
Principal Sir Alex. Grant, Bart. 
Sir W. Stirling-Maxwell, Bart. 
David Milne Home, LL.D. 
Professor Kell and. 
Rev.W. Lindsay Alexander, D.D. 
David Stevenson, Esq., C.E. 
(General Secretary — Dr John Hutton Balfour. 
Secretaries to Ordinary Meetings. 
Professor Tait. 
Professor Turner. 
Treasurer — David Smith, Esq. 
Curator of Library and Museum — Dr Maclagan. 
Professor A. Dickson. 
James Leslie, Esq., C.E. 
Rev. Thomas Brown. 
James Dewar, Esq. 
Professor Lister. 
George Robertson, Esq. 
VOL. VIII 
Councillors. 
Captain T. P. White. 
The Hon. Lord Neaves. 
The Right Rev. Bishop Cotterill. 
Professor A. Crum Brown. 
Dr Arthur Mitchell. 
I George Forbes, Esq. 
2 D 
