810 Proceedings of Royal Society of Edinburgh. [sess. 
G. N. Stewart, Esq. Communicated by Professor Rutherford, 
F.R.S. P. xvi. 234. 
The Council recommended, as Honorary Fellows, the following : — 
Foreign Honorary Fellows. 
Marcellin Pierre Eugene Berthelot, Member of the Institute of 
France. 
Dr Ernst Curtius, Professor of Philosophy in the University of 
Berlin. 
His Excellency James Russell Lowell, Esq., Hon. D.C.L. Oxford, 
and LL.D. Cambridge and Edinburgh. 
Dr Georg Hermann Quincke, Professor of Physics in the University 
of Heidelberg. 
British Honorary Fellow. 
Sir Robert Stawell Ball, LL.D., Royal Astronomer of Ireland. 
A Ballot to take place on 18th February. 
Monday , 18ifft February 1889. 
Dr Thomas Muir, Vice-President, in the Chair. 
The following Communications were read : — 
1. On the Prolonged Action of Sea Water on Pure Natural Magne- 
sium Silicates. By Alexander Johnstone, Esq., F.G.S. P. xvi. 172. 
2. On the so-called “ Liver ” of Garcinus moenas. By Dr A. B. 
Griffiths, F.C.S. P. xvi. 178. 
3. Differentiation of any (Scalar) Power of a Quaternion. By Alex- 
ander M‘Aulay, Esq., Ormonde College, Melbourne. Communicated 
by Professor Tait. P. xvi. 201. 
4. Note on the preceding Paper. By Professor Tait. P. xvi. 205. 
5. The Change in the Thermo-electric Properties of Wood’s Fusible 
Metal at its Melting Point. By Albert Campbell, Esq., B.A. Com- 
municated by Professor Tait. P. xvi. 83. 
6. On the Anatomy and Physiology of Phreoryctes. By Frank E. 
Beddard, Esq., M.A. P. xvi. 117 {Abstract)', T. xxxv. 629. 
A Photograph of an Apparatus, by Professor R. J. Anderson of 
Galway, to illustrate the Five Systems of Crystals, and also a Model of 
the Hexagonal System, was laid on the Table. 
The following Gentlemen were balloted for, and declared duly 
elected Foreign Fellows of the Society: — 
Marcellin Pierre Eugene Berthelot, Member of the Institute of 
France. 
Dr Ernst Curtius, Professor of Philosophy in the University of 
Berlin. 
