416 
Proceedings of Royal Society of Edinburgh. [sess. 
Monday , 2nd June 1890. 
Prof. Sir Douglas Maclagan, M.D., Vice-President, in the Chair. 
The following Communications were read : — 
1. On the Relation of Optical Activity to the Character of the Radicals 
united to Asymmetric Carbon Atom. By Professor Crum Brown, F.R.S. 
P. xvii. 181. 
2. On the Mean Level of the Surface of the Solid Earth. By Hugh 
Robert Mill, D.Sc. P. xviii. 185. 
3. Weierstrass’ Contributions to the Calculus of Variations. By J. 
Crockett, Esq. Communicated by Professor Tait. 
4. Barometric Record in the Vicinity of a Tornado. By John Ander- 
son, Esq. Communicated by Dr Buchan. 
The following Candidates for Fellowship were balloted for, and 
declared duly elected Fellows of the Society : — 
Dr J. J. Charles, M.A. 
R. L. Mond, B.A. Cantab. 
Monday , 1 §th June 1890. 
The Hon. Lord M‘Laren, Vice-President, in the Chair. 
The following Communications were read : — 
1. List of West Australian Birds ; showing their Geographical Distri- 
bution throughout Australia, including Tasmania. By A. J. Campbell, 
Esq., Melbourne. Communicated by the Rev. Dr MacGregor. P. 
xvii. 304. 
2. On a Difference between the Diurnal Barometric Curves at Green- 
wich and at Kew. By Alexander Buchan, Esq., LL.D. 
3. On the General Formulae for the Passage of Light through a 
spherically-arranged Atmosphere. By E. Sang, Esq., LL.D. 
4. On a remarkable Barometric Reading at the Ben Nevis Observatory 
on April 8, 1890. By Alex. Buchan, LL.D. 
5. Synthesis by means of Electrolysis — Part III. Synthesis of 
w-Dicarbodecahexanic Acid. By Professor Crum Brown and Dr James 
■Walker. P. xvii. 293. 
