Contents. 
v 
PAGE 
Variations in the Value of the Monetary Standard. By Professor 
Nicholson, . . . . . . .129 
On Ice and Brines. By J. Y. Buchanan, Esq., . . .129 
On the Distribution of Temperature in the Antarctic Ocean. By J. 
Y. Buchanan, Esq., ....... 147 
Note on a Formula for A M 0*/ n l when n, i are very large Numbers. 
By Professor Cayley, . . . . . .149 
On the Fossil Flora of the Radstock Series of the Somerset and 
Bristol Coal Fields. (Upper Coal Measures.) Part I. By R. 
Kidston, Esq., F.G.S., ... ... 153 
On the Achromatism of the Four-Lens Eye-Piece : New Arrangement 
of the Lenses. By Edward Sang, Esq., LL.D., . . .153 
An Effective Arrangement for Observing the Passage of the Sun’s 
Image across the Wires of a Telescope. By Edward Sang, Esq., 
LL.D., . . . . . . .155 
Observations on the Structural Characters of certain new or little- 
known Earthworms. By Frank E. Beddard, Esq., M.A., Prosector 
to the Zoological Society of London, and Lecturer on Biology at 
Guy’s Hospital. (Plate V.), . . . . .156 
On the Geology and Petrology of St Abb’s Head. By Professor 
Geikie. (Plate VI.), ...... 177 
Professor Rowland’s Photographs of the Solar Spectrum. Exhibited 
by the Astronomer-Royal for Scotland, . . . .194 
On Ship- Waves. By Sir W. Thomson, . . . .194 
On the Instability in Fluid Motion. By Sir W. Thomson, . . 194 
Experimental Research in Magnetism. By D. S. Sinclair, Esq. 
Communicated by Principal Jamieson, .... 194 
On the Summation of certain Series of Alternants. By A. H. 
Anglin, Esq., M.A., LL.B., &c., . 
Note on Cobaltic Alums. By Hugh Marshall, B.Sc., 
On the Effect produced on the Polarisation of Nerve by Stimulation. 
By G. N. Stewart, Esq., ...... 
The Objective Cause of Sensation. Part III. — The Sense of Smell. 
By Professor John Berry Hay craft, . . . . 
On the Physics of Noise. By Professor Crum Brown, 
On the Physical Properties of Methyl- Alcohol. By Professor Ditt- 
mar and C. A. Fawsitt, Esq., . 
On the Instability of the Double Sulphates 
M"S0 4 .R' 2 S0 4 + 6H 2 0 
of the Magnesium Series. By W. Dittmar, Esq., 
A Diatomaceous Deposit from North Tolsta, Lewis. By John 
Rattray, Esq., ....... 
On the Increase of Electrolytic Polarization with Time. By W. 
Peddie, Esq., B.Sc., ...... 
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