378 
Proceedings of the Royal Society of Edinburgh. [Sess. 
The following Candidates were balloted for, and declared duly elected 
Fellows of the Society: — Mr John Anderson Gilruth, M.R.C.V.S., and 
Mr Wm. Robertson, M.R.C.V.S. 
ELEVENTH ORDINARY MEETING. 
Monday, 6th May 1907. 
Dr Robert Munro, Vice-President, in the Chair. 
Lieut. Geo. Johnstone signed the Roll, and was duly admitted a Fellow 
of the Society. 
The following Communications were read : — 
1. Inbreeding in the Barbary Sheep ( Ovis tragelaphus) and in the Common Goat 
(Capra liircus). By J. C. Ewart, M.D., F.R.S., Regius Professor of Natural 
History, University of Edinburgh. ( With Lantern Illustrations.) 
2. Report on Fossil Fishes collected by the Geological Survey of Scotland in 
Lower Carboniferous Rocks near Gullane, East Lothian. By R. H. Traquair, 
M.D., LL.D., F.R.S. (With Lantern Illustrations.) 
3. Heusler’s Magnetic Alloy. By Alexander D. Ross, M.A., B.Sc., Houldsworth 
Research Scholar, University of Glasgow". Communicated by Professor A. Gray, 
F.R.S. pp. 88-92. 
4. The Physical Properties of Mixed Solutions of Independent Optically-Active 
Substances. By Clerk Ranken, B.Sc., Carnegie Research Scholar, and W. W. 
Taylor, M.A., D.Sc. Communicated by Professor Crum Brown, F.R.S. pp. 
172-180. 
TWELFTH ORDINARY MEETING. 
Monday, 20 th May 1907. 
Dr R. H. Traquair, F.R.S., Vice-President, in the Chair. 
The following Communications were read : — 
1. A New Method of determining the Degree of Twist in Single Threads. By 
Thomas Oliver, B.Sc., Carnegie Research Scholar. Communicated by Dr C. G. 
Knott, pp. 264-268. 
2. The Influence of Twist on the Strength of a Thread. By Thomas Oliver, 
B.Sc., Carnegie Research Scholar. Communicated by Dr C. G. Knott, pp. 
308-311. 
3. Notes on some Oligochaets found on the Scottish Loch Survey. By C. H. 
Martin, B.A. Communicated by Sir John Murray, K.C.B. 
4. Notes on some Turbellaria from Scottish Lochs. By C. H. Martin, B.A. 
Communicated by Sir John Murray, K.C.B. 
5. The Composition of the Red Clay. By F. W. Clarke, D.Sc., LL.D., Chief 
