11 
PAGE 
On certain Concretions from the Lower Coal Measures and the Fossil 
Plants which they contain. By H. B. Stocks, F.C.S. ■ Commu- 
nicated hy John Murray, LL.D., ..... 69 
On some Observations made without a Dust Counter on the Hazing 
Effect of Atmospheric Dust. By John Aitken, Esq., E.K.S. 
(With a Plate), . . . . . . .76 
Breath Figures. By John Aitken, Esq., F.R.S., . . .94 
On the Reproductive Organs of Noctua pronuba. By A. B. Griffiths, 
Ph.D., F.R.S. (Edin.), &c. (With a Plate), . . . . 98 
Data on the Phenomena of Colour-Blindness, chiefly derived from 
Foreign Sources. Compiled and arranged hy Dr William Pole, 
F. R.S., F.R.S.E., 103 
Preliminary Note on the Compressibility of Aqueous Solutions, in 
connection with Molecular Pressure. By Professor Tait, . . 141 
Elimination of Powers of Sines and Cosines between Two Equations. 
By the Hon. Lord M‘Laren, ..... 145 
.^Preliminary Account of Natural History Collections made on a Voyage 
to the Gulf of St Lawrence and Davis Straits. By Mr Alexander 
Rodger, University College, Dundee. Communicated hy Professor 
D’Arcy W. Thompson, . . . . . .154 
Abstract of Paper on the “ Rate of Fermentation of Sugars.” By W. 
G. Aitchison Robertson, M.D., D.Sc., F.R.C.P.E. {From the 
Physiological Laboratory^ University of Edinburgh), . . .164 
On the Penguins observed during the Sealing Voyage of the s.s. 
“ Active ” in the neighbourhood of Erebus and Terror Gulf. By 
C. W. Donald, M.B. Communicated hy Professor D’Arcy W. 
Thompson, ........ 170 
Preliminary Note on the Hygrometric State of the Atmosphere at Ben 
Nevis Observatory. By Andrew J. Herbertson. Communicated 
hy Dr A. Buchan, . . ' . . . . . 177 
The Second and Fourth Digits in the Horse : their Development and 
Subsequent Degeneration. By J. C. Ewart, M.D., F.R.S., Regius 
Professor of Natural History, University of Edinburgh, . . 185 
Note on the Focus of Concavo-Convex Lenses the Surfaces of which are 
of Equal Curvature. By George A. Berry, M.B., F.R.C.S. Ed., . 192 
Telegraphic Communication by Induction by Means of Coils. By 
Charles A. Stevenson, B.Sc., F.R.S.E., M.Inst. C.E. (With 
Two Plates), . 196 
On Two Stereo-Isomeric Hydrazones of Benzoin. By Alexander 
Smith, B.Sc., Ph.D., 201 
On Certain Electrical Properties of Iron Occluding Gases. By S. 
Kimura, Rigakushi. (With Two Plates), .... 203 
Note on the Antecedents of Clerk-Maxwell’s Electrodynamical-Wave- 
Equations. By Professor Tait, . . . . .213 
{Continued on p. hi of Cover.) 
