PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
Eighty-Fifth Session. 
Monday , 25 th November 1867. 
Professor PLAYFAIR, C.B., Vice-President, in the Chair. 
The following Council were elected : — 
President. 
Principal Sir DAVID BREWSTER, K.H., LL.D., D.O.L. 
Honorary Vice-President, having filled the Ofiice of President. 
VOL. VI. 
1867-68. 
No. 74. 
His Grace the DUKE of ARGYLL. 
Vice-Presidents. 
Principal Forbes. 
Professor C. Innes. 
Prof. Lyon Playfair, C.B. 
D. Milne Home, Esq. 
Dr Christison. 
Professor Kell and. 
General Secretary — Dr John Hutton Balfour. 
Secretaries to the Ordinary Meetings. 
Dr George James Allman. 
Professor Tait. 
Treasurer — David Smith, Esq. 
Curator of Library and Museum — Dr Douglas Maclagan. 
Councillors. 
Br A. Crum Brown. 
Dr Burt. 
Dr Matthews Duncan. 
Professor Turner. 
Dr John Muir. 
Rev. Thomas Brown. 
James Sanderson, Esq. 
Hon. Lord Neaves. 
R. W. Thomson, Esq., C.E. 
George Robertson, Esq., C.E. 
Professor Piazzi Smyth. 
Patrick Dudgeon, Esq. of Cargen. 
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