VI 
Contents. 
PAGE 
On the Soaring of Birds : being an Extract from a Letter of the late 
Mr William Fronde to Sir W. Thomson, of 5th February 1878, 
received after Mr Fronde’s death, ..... 256 
Preliminary Note on New Determinations of the Electric Resistance 
of Liquids. By W. Peddie, Esq., B.Sc., .... 259 
Notice of the Recent Earthquake in Scotland, with Observations on 
those since 1882. By Charles A. Stevenson, Esq., B.Sc., Assoc. 
M.Inst.C.E. (Plate V.), ...... 259 
Analysis of the “ Challenger ” Meteorological Observations. By Dr 
Buchan, ........ 267 
On the Conjugated Sulphates of the Copper-Magnesium Group. By 
Prafulla Chandra Ray, Esq., ..... 267 
On the Chemical Composition of the Water composing the Clyde 
Sea Area. Part II. By Adam Dickie, Esq., . . . 283 
On the Principles of Animal Morphology. By Professor Wilhelm 
His of Leipzig. Letter to Dr John Murray, H.P.R.S.Ed. Com- 
municated by Professor Sir William Turner, . . . 287 
Mathematical Notes. By Professor Tait, .... 298 
Analysis of the “ Challenger ” Meteorological Observations. By Dr 
Buchan, . . ...... 298 
Description of the Rocks of the Island of Malta, and Comparison 
with Deep-Sea Deposits. By Dr John Murray, . . . 298 
An Electrical Method of Reversing Deep-Sea Thermometers. By 
Professor Chrystal, ....... 298 
On a Class of Alternants expressible in terms of Simple Alternants. 
By Thomas Muir, LL.D., ...... 298 
Quaternion Note. By Professor Tait, .... 308 
Exhibition of Specimens of Eggs of Cod and Haddock. By Dr John 
Murray, ........ 308 
On the Secretion of Lime by Animals. By Robert Irvine, Esq., 
F.R.S.E., F.C.S., and Dr G. Sims Woodhead, . . . 308 
On the Solubility of Carbonate of Lime under different forms in Sea- 
Water. By Robert Irvine, Esq., F.R.S.E., and George Young, Esq., 316 
On a Case of Absence of the Corpus Callosum in the Human Brain. 
By Dr Alexander Bruce. (Plates VI.-XIII.), . . . 320 
Distribution of some Marine Animals on the West Coast of Scotland. 
By Dr John Murray, . . . . . .341 
Remarks on the Larvae of certain Schizopodous Crustacea from the 
Firth of Clyde. By W. E. Hoyle, Esq., M.A., . . . 341 
Exhibition of Photographs of the Nice Observatory. By the As- 
tronomer-Royal for Scotland, ..... 342 
Note on the Hydrodynamical Equations. By Professor Cayley, 
Hon. F.R.S.E., . . . . . . .342 
The History of Volcanic Action during the Tertiary Period in the 
British Islands. By Dr Archibald Geikie, F.R.S., . . 344 
