724 Proceedings of Royal Society of Edinburgh [sess. 
FOURTH ORDINARY MEETING. 
Monday , 23 rd January 1899. 
Sir Arthur Mitchell, K.C.B., Vice-President, in the Chair. 
The following Communications were read : — 
1. Symmetrical Solution of the Ellipse- Glissette Elimination Prob- 
lem. By the Hon. Lord M‘Laren. pp. 379-387. 
2. Experimental Contributions to the Theory of Heredity : — Rever- 
sion, Part II. By Professor Cossar Ewart, F.R.S. 
FIFTH ORDINARY MEETING. 
Monday , 6th February 1899. 
The Right Hon. Lord Kelvin, G.C.V.O., President, in the Chair. 
Mr George Alfred Nash was admitted a Fellow of the Society. 
The following Communications were read : — 
1. On Nernst’s “ Osmotic Experiment,” and a Definition of Osmotic 
Pressure. By Professor Crum Brown, pp. 439, 440. 
2. On a Nomenclature of the Anhydrides of Acids proposed by the 
late Professor Andrews. By the Same. 
3. Application of Sellmeier’s Dynamical Theory to the Dark Lines D 1? 
D 2 , produced by Vapour of Sodium. By the President, pp. 523-531. 
4. On the Motion of Liquid in an Ellipsoidal Hollow — a continuation 
of a paper in Proc. Roy. Soc. Edin ., December 7, 1885. By the Same. 
5. The Rainfall of Australasia. Part I. — The Mean Annual Rainfall 
of Australia. By A. J. Herbertson and P. C. Waite. 
6. The Multiplication of an Alternant by a Symmetrical Function of 
the Variables. By Thomas Muir, LL.D. pp. 539-542. 
Dr Allan M £ Lane Hamilton, Dr David W. Finlay, Mr 
Joseph Slater Lewis, Mr George Duthie, and Mr James 
M‘Cubbin were balloted for, and declared duly elected Fellows of 
the Society. 
FIRST SPECIAL MEETING. 
Thursday , 9 th February 1899. 
Professor Copeland, Astronomer-Royal for Scotland, 
Vice-President, in the Chair. 
At the request of the Council , Vice-Admiral Makaroff, of the 
Imperial Russian Navy, gave an Address “ On some Important 
