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Proceedings of the Royal Society of Edinburgh. [Sess. 
PROCEEDINGS OF THE ORDINARY MEETINGS, 
Session 1913-1914. 
FIRST ORDINARY MEETING. 
Monday , November 3, 1913. 
Professor James Geikie, LL.D., D.C.L , F.R.S., F.G.S., President, in the Chair. 
The President opened the Session with a short Address. 
The following Communications were read : — 
1. Atmospheric Electric Potential Results at Edinburgh during 1912. By G. A. Cause, 
M.A. , D.Sc., and G. Shearer, M.A., B.Sc. ( With Lantern Illustrations.) 
2. Some Factorable Minors of a Compound Determinant. By Professor W. H. Metzler, 
A.B., Ph. D. 
3. An Analytical Theory of the Equilibrium of an Isotropic Elastic Rod of Circular Section. 
By Dr John Dougall. Communicated by Professor G. A. Gibson, LL.D. 
The following, nominated for Honorary Fellowship, were balloted for, and duly declared 
elected : — 
As British Honorary Fellows : — 
1. Horace Lamb, M.A., Sc.D. , D.Sc., LL.D., F.R.S., Professor of Mathematics in the 
University of Manchester. 
2. Sir William Turner Thiselton-Dyer, K.C.M.G., C.I.E., M.A., LL.D., F.R.S., formerly 
Director of the Royal Botanic Gardens, Kew. 
As Foreign Honorary Fellows : — 
1. George Ellery Hale, F.M.R.S., Director of the Mount Wilson Solar Observatory 
(Carnegie Institute of Washington). 
2. Emil Clement Jungfleisch, Mem. Inst. Fr., Professor of Organic Chemistry in the 
College of France, Paris. 
3. Santiago Ramon y Cajal, F.M.R.S., Professor of Histology and Pathological Anatomy in 
the University of Madrid. 
4. Vito Yolterra, F.M.R.S., Sc.D., Ph.D., Professor of Mathematics and Physics in the 
University of Rome. 
5. Charles Ren& Zeiller, Mem. Inst. Fr. , Professor of Plant Palajontology in the National 
Superior School of Mines, Paris. 
SECOND ORDINARY MEETING. 
Monday , November 17, 1913. 
Professor James Geikie, LL.D., D.C.L., F.R.S., F.G.S., President, in the Chair. 
The following Communications were read : — 
1. On the Fossil Flora of the Staffordshire Coal Fields. Part III. — The Fossil Flora of the 
Westphalian Series of the South Staffordshire Coalfield. By Dr R. Kidston, F.R.S. ( With 
Lantern Illustrations. ) 
2. Sphcerostoma ovale ( Conostoma ovale et intermedium , Williamson), a Lower Carboniferous 
Ovale from Pettycur, Fifeshire, Scotland. By Professor Margaret J. Benson, D.Sc. Com- 
municated by Dr R. Kidston, F.R.S. 
3. Studies on the Pharmacological Action of Tetra-alkyl-ammonium Compounds. I. — The 
Action of Tetra-methyl-ammonium Chloride. By Professor C. R. Marshall, M.D. ( With 
Lantern Illustrations.) 
4. The Theory of Bigradients from 1859-1880. By Dr Thomas Muir, F.R.S. 
The following Candidate for Fellowship was balloted for, and duly declared elected : — 
Edward Philtp Harrison, Ph.D. 
