Contents. ix 
Obituary Notice of Dr Robert Edward Grant, late Professor of Com- 
parative Anatomy in University College, London. By Dr W. 
Sharpey, ........ 486 
An Illustration of the relative Rates of Diffusion of Salts in Solution. 
By Professor Crum Brown, ...... 490 
On the Oscillation of a System of Bodies with rotating Portions. By 
Sir William Thomson, ...... 490 
Laboratory Notes. By Professor Tait — 
a. On the Application of Sir W. Thomson’s Dead-Beat 
Arrangement to Chemical Balances, . . . 490 
b. Photographs of Electric Sparks taken in Cold and in Heated 
Air, ....... 49.1 
c. On the Electric Resistance of Iron at High Tempera- 
tures, ....... 491 
Biographical Notice of William Ewing, Esq., F.R.S.E. By Professor 
William P. Dickson, . . . . . .491 
On a Faulty Construction common in Skewed Arches. By Edward 
Sang, Esq., . •* . . . • . . . 497 
On the mode of Growth and Increase amongst the Corals of the 
Palaeozoic Period. By IT. Alleyne Nicholson, M.D., D.Sc., Pro- 
fessor of Biology in the Durham University College of Physical 
Science, ........ 498 
Exhibition of Diagrams in Illustration of the Capillary Surfaces of 
Revolution. By the President, . . ,. . 500 
Presentation of the Makdougall Brisbane Prize to Professor Lister, . 500 
On the Diurnal Oscillations of the Barometer. By Alexander Buchan, 
M.A., . . . . . . . .505 
The Phenomena of Single and Double Vision, as shown in the Stereo- 
scope. By R. S. Wyld, Esq., ..... 505 
On the Products of the Oxidation of Dimethyl-Thetine, and its Deriva- 
tives. By Professor Crum Brown and Dr E. A. Letts, . . 508 
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 C. M‘Kendrick, .... 513 
On the Structure and Systematic Position of Tristichopterus alatus, 
Egerton. By R. H. Traquair, M.D., F.C.S., . . .513 
Note of Temperature Measurements in the Great 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 Illustra- 
tions. By Sir William Thomson, . . . . .521 
On the Theory of the Spinning-Top, with Experimental Illustrations. 
By Sir William Thomson, . . . . .521 
YOL. VIII. b 
