1906-7.] 
Meetings of the Society. 
377 
NINTH ORDINARY MEETING. 
Monday , 4 th March 1907. 
Professor Crum Brown, LL.D., F.R.S., Vice-President, in the Chair. 
Mr Andrew Watt signed the Roll, and was duly admitted a Fellow 
of the Society. 
The following Communications were read : — 
1. Algebra after Hamilton, or Multenions. By Alexander M‘Aulay, M.A., 
Professor of Mathematics in the University of Tasmania. Communicated by Dr 
C. G. Knott. 
2. Note on the Change produced in the Conductivity and Density of Lead Wires 
by Permanent Stretching. By James A. Donaldson and Robert Wilson, Natural 
Philosophy Department, Edinburgh University. Communicated by Professor J. G. 
MacGregor, pp. 16-20. 
3. On the Dynamical Theory of Seismometers. By C. G. Knott, D.Sc. 
4. Temperature Observations in the North Sea. By Professor D’Arcy W. 
Thompson, C.B. (With Lantern Illustrations.) 
5. The Boiling and Freezing Points of Concentrated Aqueous Solutions, and the 
Question of the Hydration of the Solute. By Rev. S. M. Johnston, B.A., D.Sc., 
F.R.S.E., Carnegie Research Fellow, etc. Trans., vol. xlv. pp. 855-884. 
TENTH ORDINARY MEETING. 
Monday, 18 th March 1907. 
Dr R. H. Traquair, F.R.S., Vice-President, in the Chair, 
Dr Wm. Cramer signed the Roll, and was duly admitted a Fellow 
of the Society. 
The following Communications were read : — 
1. On the Influence of Temperature on the Photo-Electric Discharge from 
Platinum. By W. Mansergh Yarley, D.Sc. (Manchester and Leeds), Ph.D. 
(Strassburg), B.A. (Cantab.), Assistant Professor of 1 ’hysics and Electrical Engineering, 
and Fred. Unwin, M.Sc. (Manchester), Assistant Lecturer in Physics, Heriot-Watt 
College, Edinburgh. Communicated by Professor F. G. Baily, M.A., M.I.E.E. 
pp. 117-134. 
2. On the Discovery of a new Genus of Thread-Bacteria (Spirojphyllum 
ferrugineum , Ellis). By David Ellis, D.Sc., Ph.D., Lecturer in Botany and 
Bacteriology, Glasgow and West of Scotland Technical College, pp. 21-34. 
3. The Functions of the Rolandic Cortex in Monkeys. By Wm. A. Jolly, M.B., 
and Sutherland Simpson, M.D., D.Sc. (From the Physiological Laboratory, 
University of Edinburgh.) Communicated by Professor E. A. Schafer, F.R.S. 
pp. 64-78. 
