IV 
CONTENTS. 
On the Motions and Colours upon Films of Alcohol, Volatile Oils, 
and other Fluids. By Sir David Brewster, K.H., F.R.S. , &c., . 108 
Note on the Action of Nitric Oxide, Nitrous Acid, and Nitrites on 
Haemoglobin. By Arthur Gamgee, M.D., .... 109 
Antiquities, Scenery, &c., of Cambodia, illustrated by a series of 
Photographs, shown by the Oxyhydrogen Light. By J. Thomson, 
Esq., F.R.G.S. Communicated by Professor Sir J. Y. Simpson, 
Bart., . . . . . . . .112 
Donations to the Library, . . . . . .112 
On the Application of Relative, or Proportional, Equality to Inter- 
national Organisation. By Professor Lorimer, . . .113 
On the Sophists of the Fifth Century, b.c. By Professor Blackie, . 119 
An Account of some peculiarly-shaped Mineral Concretions found 
near Carlisle. By Henry Barnes, M.D. Communicated by Sir 
David Brewster, . . . . . . .120 
Note on Professor Tait’s “ Quaternion Path ” to Determinants of the 
Third Order. By the Rev. Hugh Martin, M.A. Communicated 
by Professor Kelland, . . . . . .121 
Donations to the Library, . . . . . .125 
On the Analysis of Compound Ethers. By W. Dittmar, Esq., . 126 
On a Derivative of Meconic Acid. By Messrs James Dewar and 
William Dittmar, . . . . . . .129 
On the Action of Ammonia on Dichloracetone. By Dr A. Crum 
Brown, . . . . . . . .133 
On Centres, Faisceaux, and Envelopes of Homology. By Rev. Hugh 
Martin, M.A. Communicated by Professor Kelland, . .134 
On the Effect of Pressure upon Rock Salt and Iceland Spar. By M. 
Reusch, Professor of Natural Philosophy in the University of 
Tubingen. Communicated by Sir David Brewster, . .134 
Donations to the Library, . . . . . .139 
On the Nature and Character of European Winter Storms, with the 
best means of giving Warning of their Approach. By R. Russell, 
Esq., ....... 140 
On the Vapour Lines in the Spectrum. By Sir David Brewster, 
K.H., F.R.S., . . . . • . .145 
On the Radiant Spectrum. By Sir David Brewster, K.H., F.R.S., . 147 
On the Vibration of a Uniform Straight Spring. By Edward Sang, Esq., 150 
Donations to the Library, . . . . . .156 
Description of a Double and Triple Holophote, and of a Method of 
Introducing the Electric and other Lights. By Sir David Brewster, 
K.H., F.R.S., 157 
On the Effect of Reduction of Temperature on the Coagulation of the 
Blood. By John Davy, M.D., F.R.SS. Lond. and Edin., . . 157 
Note on a former Paper on the Theory of Double Refraction. By A. 
R. Catton, M.A., Fellow of St John’s College, Cambridge, . . 159 
A Preliminary Notice of the Akazga Ordeal of West Africa, and of its 
Active Principle. By Thomas R. Fraser, M.D., . . . 159 
