FAGE 
The Phenomena of Single and Double Vision, as shown in 
the Stereoscope. By R. S. Wyld, Esq., . . 505 
On the Products of the Oxidation of Dimethyl-Thetine, and 
its Derivatives. By Prof. Crum; Brown and Dr E. A. 
Letts, ....... 508 
Monday , 5th April 1875. 
Presentation of the Neill Prize to Charles Wm. Peach, . 509 
On the Physiological Action of Light. Part II. By James 
Dewar, Esq., and Dr John Gr. M ‘Kendrick, . . 513 
On the Structure and Systematic Position of Tristichopterus 
alatus , Egerton. By R. H. Traquair, M.D., E.G-.S., . 513 
Monday , l§th April 1875. 
Note of Temperature Measurements in the G-reat Geysir of 
Iceland — August, 1874. By Robert Walker, Esq., . 514 
On the Capillary Surface of Revolution. By Sir William 
Thomson and Mr John Perry, .... 520 
On the Oscillation of a System of Bodies with Rotating 
Portions. Part II.— -Vibrations of a Stretched String 
of Gyrostats (Dynamics of Faraday’s Magneto-Optic 
Discovery), with Experimental Illustrations. By Sir 
William Thomson, ..... 521 
On the Theory of the Spinning-Top, with Experimental 
Illustrations. By Sir William Thomson, . . 521 
Monday , 3 d May 1875. 
Laboratory Note — Analysis of Titaniferous Iron Sand from 
North Berwick. By James Davidson, Esq. Com- 
municated by Professor Crum Brown, . . 523 
On some Permian Eishes, hitherto erroneously referred to 
the Genus Palceoniscus. By Dr Traquair, . . 525 
Note on the action of Bile Salts on the Animal Economy. 
By J. Graham Brown, Esq. Communicated by Dr 
M ‘Kendrick, . ..... 525 
Preliminary Note on the Anatomy of the Pia Mater. By 
Dr J. Batty Tuke, ..... 534 
Note on the Physiological Action of Light. By James 
Dewar, Esq., and Dr M‘Kendrick, . # 534 
Monday , 17 th May 1875. 
On the Expiatory and Substitutionary Sacrifices of the 
Greeks. By Dr Donaldson, .... 53.5 
The Placenta in Ruminants — a Deciduate Placenta. By 
Professor Turner, .... . 537 
An Essay towards the General Solution of Numerical 
Equations of all Degrees. By W. H. Eox Talbot, 
Esq., Hon. E.R.S.E., ..... 544 
Note on the Electrical Conductivity of Saline Solutions. 
By J. G. MacGregor, M.A., B.Sc. Communicated by 
Professor Tait, . . . . . 545 
Monday , 7th June 1875. 
On High Flood Marks on the Banks of the River Tweed 
and some of its tributaries, and on Drift Deposits in 
Tweed Valley. By David Milne Home, LL.D., . 559 
