PROCEEDINGS 
ROYAL SOCIETY OF EDINBURG 
SESSION 1915-16. 
DEC 6-1916 
-L.. 
A-O'onal Mu*®, 
Parts I and II] 
VOL. XXXVI. 
[Pp. 1-192 
CONTENTS. 
NO. PAGE 
I. The Influence of James Geikie’s Researches on the Development 
of Glacial Geology. Opening Address by John Horne, 
LL.D. ; F.R.S., President, 1 
( Issued separately May 8, 1916.) 
II. Notices of Fellows, Honorary and Ordinary, recently deceased. 
By The General Secretary, . . . . . 26 
( Issued separately May 8, 1916.) 
III. The Torsional Vibration of Beams of Commercial Section. 
By Ernest G. Ritchie, B.Sc., Engineering Department, 
University College, Dundee. Communicated by Professor 
A. H. Gibson, 32 
{Issued separately May 8, 1916 ) 
IV. The Origin of Oil-Shale. By E. H. Cunningham-Craig, B.A., 
F.G.S. Communicated by Dr Horne, F.R.S., . . . 44 
{Issued separately May 16, 1916.) 
V. The “ Geometria Organica ” of Colin Maclaurin : A Historical 
and Critical Survey. By Charles Tweedie, M.A., B.Sc., 
Lecturer in Mathematics, Edinburgh University, . . 8 7 
{Issued separately October 20, 1916.) 
[ Continued on page iv of Cover . 
EDINBURGH: 
Published by ROBERT GRANT & SON, 107 Princes Street, and 
WILLIAMS & NORGATE, 14 Henrietta Street, Covent Garden, London. 
MDCCCCXVI. 
Price Eleven Shillings. 
