1919 - 20 .] 
Meetings of the Society, 
203 
PROCEEDINGS OF THE ORDINARY MEETINGS, 
Session 1919-1920. 
FIRST ORDINARY MEETING. 
Monday , November 3, 1919. 
Professor Frederick 0. Bower, M.A., D.Sc., LL. D., F.R.S., F.L.S., President, in the Chair. 
The President delivered a short Address. 
The following Communications were submitted : — 
1. The Cooling of the Soil at Night, with Special Reference to Late Spring Frosts. By Capt. 
T. Bedford Franklin. Communicated by The General Secretary. Proc., vol. xl, pp. 10-22. 
2. Note on the Determinant whose Matrix is the Sum of Two Circulant Matrices. By Sir 
Thomas Muir, LL.D., F.R.S. Proc., vol. xl, pp. 23-32. 
3. Note and Exhibition of Photographs of Mirage at Ingatestone. By G. F. Quilter, Esq. 
Communicated by The General Secretary. Proc., vol. xl, p. 33. 
Mr B. D. Porritt signed the Roll and was duly admitted a Fellow of the Society. 
SECOND ORDINARY MEETING. 
* Monday, December 1, 1919. 
Professor Frederick O. Bower, M.A., D.Sc., LL.D., F.R.S. , F.L.S., President, in the Chair. 
The following Communications were submitted : — 
On Old Red Sandstone Plants showing Structure from the Rhynie Chert Bed, Aberdeenshire. 
Part III. : Asteroxylon Mackiei, Kidston and Lang. By Dr R. Kidston, F.R.S., and Professor 
W. H. Lang, D.Sc., F.R.S. Trans., vol. lii, pp. 643-680. 
Two Special Meetings of the Royal Society of Edinburgh were held in the Society’s House, 
24 George Street, on Monday, December 8, 1919, and on Tuesday, December 9, 1919, 
at 5 p.m. 
Professor William Peddie, D.Sc., Vice-President, in the Chair. 
By request of the Council, Professor R. A. Sampson, M.A., D.Sc., F.R.S., gave addresses on 
“ The Theory of Gravitation.” 
8 tli December , at 5 p.m. 
1. Newton’s Views and their Subsequent History. 
9 th December, at 5 p.m. 
2. The Theory of Einstein, and its Observational Tests. 
THIRD ORDINARY MEETING. 
Monday, January 12, 1920. 
Professor Frederick O. Bower, M.A., D.Sc., LL.D., F.R.S., F.L.S., President, in the Chair. 
The following Communications were submitted : — 
1. Obituary Notices of Fellows deceased during the Session 1918-1919. By The General 
Secretary. 
2. The Atomic Space Lattice in Magnetite. By Professor W. Peddie, D.Sc. 
3. An Unnoticed Point in the Theory of Newton’s Rings. By John Marshall, M. A., B. Sc. 
Communicated by Professor W. Peddie, D.Sc. Proc., vol. xl, pp. 51-55. 
4. Theoretical Determination of the Longitudinal Seiches of Lake Geneva. By Messrs A. T. 
Doodson, R. M. Carey, and R. Baldwin. Communicated by Dr E. M. Wedderburn, M.A., 
LL.B. Trans., vol. lii, pp. 629-642. 
