1920 - 21 .] 
215 
Meetings of the Society. 
The following Communications were submitted : — 
1. The Relation of the Soil Colloids to the Conductivity of the Soil. By T. Bedford 
Franklin, B.A. Proc., vol. xli, pp. 61-67. 
2. The Natural History of Pack Ice as observed in the Weddell Sea, December 1914 to April 
1916. By J. M. Wordie, M.A., F.G.S. Communicated by Professor J. W. Gregory, F.R.S. 
Trans., vol. lii, pp. 795-829. 
3. Shackleton Antarctic Expedition, 1914-1917 : Bathymetrical Observations in the Weddell 
Sea. By J. M. Wordie, M.A., F.G.S. Communicated by Professor J. W. Gregory, F.R.S. 
Trans., vol. lii, pp. 781-793. 
SIXTH ORDINARY MEETING. 
Monday , March 7, 1921. 
Professor Frederick 0. Bower, M. A., D.Sc., LL.D., F.R.S., F.L.S., President, in the Chair. 
The Ballot for the election of Ordinary Fellows was taken. The Scrutineers were Mr Gall 
Inglis and Dr J. M‘Lean Thompson. The undernoted Gentlemen were declared duly elected to 
the Ordinary Fellowship of the Society : — Nelson Annandale, William Arthur, Bevan 
Braith waite Baker, Archibald Barr, John Bartholomew, Alexander Bruce, Andrew 
Campbell, Rasik lal Datta, John Dougall, Charles Vickery Drysdale, George Topham 
Forrest. Walcot Gibson, John Wm. Heslop Harrison. James Alex. George Lamb, Rev. 
Albert Ernest Laurie, Neil M'Akthitr, Dougald Black M‘Quistan, Thomas Murray 
MacRobert, John M'Whan, John Mathieson, Sir Geo. Herbert Pollard, Edward Burns 
Ross, Rt. Hon. James Parker Smith, Norman Kemp Smith, Ian Struthers Stewart. 
The following Communications were submitted : — 
1. On a Graphical Method of Determining Shear Influence Lines, and Diagrams of Maximum 
Shearing Force, for a Beam subjected to a Series of Concentrated Rolling Loads. By Professor 
A. R. Horne, B.Sc. Proc., vol. xli, pp. 68-72. 
2. Studies in Floral Morphology. No. 2 : The Staminal Zygomorphy of Couroupita guianensis, 
Aubl. By Dr J. M ‘Lean Thompson. Trans., vol. liii, pp. 1-15. 
SEVENTH ORDINARY MEETING. 
Monday , March 21, 1921. 
Professor Frederick 0. Bower, F.R.S., President, and afterwards Professor R. A. Sampson, 
F.R.S., Vice-President, in the Chair. 
The following recently elected Ordinary Fellows were admitted and signed the Roll: — Mr 
J. A. G. Lamb, the Rev. A. E. Laurie, Mr D. B. M'Quistan, Professor E. B. Ross, and the Rt. 
Hon. J. Parker Smith. 
The following Communications were submitted : — 
1. An Experimental Analysis of the Losses by Evaporation of Liquid Air contained in Vacuum 
Flasks. By Professor Henry Briggs, D.Sc. Proc., vol. xli, pp. 97-110. 
2. A Generalisation of Lagrange’s Equations of Motion and their Hamiltonian Forms. By Dr 
John Marshall, M.A. 
3. Note on a Continuant of Cayley’s of the year 1874. By Sir Thomas Muir, C.M.G., LL.D., 
F.R.S. Proc., vol. xli, pp. 111-116. 
EIGHTH ORDINARY MEETING. 
Monday, May 2, 1921. 
Professor Frederick 0. Bower, M.A., D.Sc., LL.D., F.R.S., F.L.S., President, in the Chair. 
The following recently elected Ordinary Fellows were admitted and signed the Roll : — Mr B. B. 
Baker and Dr Walcot Gibson. 
The following Communications were submitted : — 
1. Behaviour of an Electrified Pith Ball in an Ionised Atmosphere, illustrated with Experi- 
ments. By Dr Dawson Turner and Mr D. M. R. Crombie. Proc., vol. xli, pp. 154-157. 
