PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
vol. x. 1878-79. No. 103. 
Ninety-Sixth Session. 
Monday , 2Qth November 1878. 
Sir WILLIAM THOMSON in the Chair. 
The following Council were elected 
President. 
Professor KELLAND, M.A. 
Honorary Vice-Presidents. 
His Grace the DUKE of ARGYLL. 
Sir ROBERT CHRISTISON, Bart., M.D. 
Sir WILLIAM THOMSON, Knt., LL.D. 
Vice-Presidents. 
David Stevenson, Memb. Inst. C.E. 
The Right Rev. Bishop Cotterill. 
Principal Sir Alex. Grant, Bart. 
David Milne Home, LL D. 
Sir C. Wyville Thomson, LL.D. 
Prof. Douglas Maclagan, M.D. 
General Secretary — Dr John Hutton Balfour. 
Secretaries to Ordinary Meetings . 
Professor Tait. 
Professor Turner. 
Treasurer — David Smith, Esq. 
Curator of Library and Museum — Alexander Buchan, M.A. 
Councillors. 
Professor Fleemtng Jenkin. 
Rev. R. Boog Watson. 
Dr Hugh Cleghorn. 
Professor T. R. Fraser. 
Professor Rutherford. 
Dr R. M. Ferguson. 
Rev. W. Lindsay Alexander, D.D. 
Dr Thomas A. G. Balfour. 
J. Y. Buchanan, M.A. 
Rev. Thomas Brown. 
Robert Gray. 
Dr William Robertson. 
vol. x. 
a 
