X 
Contents. 
PAGE 
Laws of Solution. By William Durham, .... 779 
On the Fructification of some Ferns from the Carboniferous 
Formation. By R. Kidston, F.G.S. Communicated by Dr 
Traquair, . . . . . . . .783 
On the Tidal Variation of Salinity and Temperature in the Estuary 
of the Forth. By Hugh Robert Mill, D.Sc., and J. T. Morrison, 
M.A., of the Scottish Marine Station. (Plate XXVIII.) . .790 
On a New Method and Reagent for detecting Chlorides, Bromides, 
and Iodides, in the presence of each other, and also in presence of 
Nitrates and Chlorides. By John Jas. Barlow, Manchester 
Technical School, . . . . . . .799 
On the Anatomy of Suberites domnuncula. By J. Arthur Thomson, 
M.A. Communicated by Patrick Geddes, Esq., . . . 803 
History and Theory of Spermatogenesis. By Patrick Geddes and J. 
Arthur Thomson. (Plate XXIX.), .... 803 
On Tungsten. By John Waddell, D.Sc. Communicated by Dr 
Crum Brown, ....... 823 
On Certain Theorems mainly connected with Alternants. By A. H. 
Anglin, M.A., LL.B., F.R.S. (Edin.), &c., .... 823 
The Diurnal Variation in the Direction of the Summer Winds on 
Ben Nevis. By R. T. Omond, Superintemdent, Ben Nevis Obser- 
vatory, ........ 839 
The Meteorology of Ben Nevis. By Alex. Buchan, M.A., . . 843 
On some Algoid Lake-Balls found in South Uist. By G. W. W. 
Barclay, F.R.S.E. (Plate XXX.), ..... 845 
The Duration of the Life of Red Blood Corpuscles, as ascertainable 
by Transfusion. By William Hunter, M.D. (Edin.), late President 
of the Royal Medical Society, Edinburgh, . . . .849 
The Electric Resistance of Nickel at High Temperatures. By Pro- 
fessor C. G. Knott, ....... 856 
Effect of External Forces on a System of Colliding Spheres. By 
Professor Tait, . . . . . . .856 
Notes on the Characters and Mode of Formation of the Coral Reefs 
of the Solomon Islands, being the Results of Observations made in 
1882-84, by H. B. Guppy, M.B., F.G.S., during the Surveying 
Cruise of H.M.S. “ Lark/ 7 . . . . . .857 
The Eggs and Early Stages of some Teleosteans. By J. T. Cunning- 
ham, Esq., ........ 904 
The Reproductive Organs of Bdellostoma, and a Teleostean Egg from 
the West Coast of Africa. By the same, . . . .904 
A Synthetic Outline of the History of Biology. By Patrick Geddes, 904 
Theory of Growth, Reproduction, Sex, and Heredity. By Patrick 
Geddes, ........ 911 
