viii Contents. 
PAGE 
The Theory of Colour Vision. By Dr W. Peddie. Issued separ- 
ately August 3, 1903, ...... 448 
A Direct Electrical Method of Determining Latent Heat of Evapora- 
tion at the Boiling Point. By A. Cameron Smith, M.A., B.Sc., 
Lecturer in Physics, Heriot-Watt College, Edinburgh. Com- 
municated by Professor F. G. Baily. Issued separately August 
8, 1903, ........ 450 
The Wild Horse ( Equus prjevalskii, Poliakoff). By J. C. Ewart, 
M.D., F.B.S., Professor of Natural History, University of Edin- 
burgh. Issued separately August 8, 1903, . . . 460 
Statistical Evidence regarding the Influence of Artificial Propaga- 
tion upon the Salmon of the American Hi vers. By William 
Murray. Communicated by Dr D. Noel Paton. Issued separ- 
ately August 8, 1903, ...... 469 
October Salmon in the Sea. By D. Noel Paton, M.D. (With 
Three Plates.) Issued separately August 28, 1903, . . 486 
Note on a Method of Bringing Together the Two Spectra Com- 
pared in the Ordinary Spectrophotometer. By J. R. Milne, 
B.Sc. Communicated by Professor J. G. MacGregor. Issued 
separately August 28, 1903, ..... 496 
Note on Resistance Change accompanying Transverse Magnetisa- 
tion in Nickel Wire. By Professor C. G. Knott, D.Sc., and 
Mr Peter Ross, M.A. Issued separately August 28, 1903, . 501 
On the Abdominal Viscera of Cercocebus fuliginosus and Lagothrix 
humboldti. By O. Charnock Bradley, M.B. (With Three 
Plates.) Issued separately October 21, 1903, . . . 505 
The Molecular Condition of Iron Demagnetised by Various 
Methods. By James Russell. Issued separately October 17, 
1903, ........ 544 
A Special Circulant considered by Catalan. By Thomas Muir, 
LL.D. Issued separately October 21, 1903, . . . 547 
The Theory of Axisymmetric Determinants in the Historical 
Order of Development up to 1841. By Thomas Muir, LL.D. 
Issued separately December 28, 1903, .... 555 
On the Origin of the Pineal Body as an Amesial Structure, deduced 
from the Study of its Development in Amphibia. By John 
Cameron, M.B. (Edin.), M.R.C.S. (Eng.), Carnegie Fellow, 
Demonstrator of Anatomy, United College, University of St 
Andrews. Communicated by Dr W. G. Aitchison Robertson. 
(With a Plate.) Issued separately December 28, 1903, . . 572 
Meetings of the Royal Society — Sessions 1901-1903, . . 582 
Donations to the Library, . . . . . .612 
Obituary Notices, ...... 642 
Abstract of Accounts for Session 1902-1903, . . . 650 
Index, ........ 661 
