PROCEEDINGS 
OF TIIE 
ROYAL SOCIETY OF EDINBURGH. 
vol. vi. 1868-69. No. 77. 
Eighty Sixth Session. 
Monday, 23 d November 1868. 
DAVID MILNE-HOME, Esq., Vice-President, in the Chair. 
The following Council were elected : — • 
President. 
Professor CHRISTISON, M.D. 
Honorary Vice-Presidents. 
His Grace the DUKE of ARGYLL. 
JAMES D. FORBES, Esq., LL.D. 
Vice-Presidents. 
Professor C. Xnnes. 
Prof. Lyon Playfair, C.B. 
D. Milne Home, Esq. 
Professor Kelland. 
The Hon. Lord Neaves. 
Professor Sir William Thompson. 
General Secretary — Dr John Hutton Balfour. 
Secretaries to the Ordinary Meetings, 
Dr George J ames Allman. 
Professor Tait. 
Treasurer — David Smith, Esq. 
Curator of Library and Museum — Dr Douglas Maclagan. 
Councillors. 
Dr John Muir. 
Rev. Thomas Brown. 
James Sanderson. Esq. 
R. W. Thomson, Esq. 
George Robertson, Esq., C.E 
Professor Piazzi Smyth. 
Patrick Dudgeon, Esq. of Cargen. 
Dr Hugh Cleghorn. 
W. Dittmar, Esq. 
James M‘Bain, Esq., Surgeon, R.N. 
Dr William Robertson. 
Thomas Stevenson, Esq., O.E. 
3 E 
VuL. vi. 
