PAGE 
ii 
Biographical Notice of Christopher Hansteen. By Alex- 
ander Buchan, Esq., . ,. . . 473 
Biographical Notice of Jacques- Adolphe-Lambert Quetelet. 
By Alexander Buchan, Esq., .... 474 
Biographical Notice of G-eorge Berry. By George Barclay, 
Esq., . . . . . . 476 ' 
Monday , 1st February 1875. 
On the Complete Theory of the Stone Arch. By Edward 
Sang, Esq., ...... 479 
On the Application of Angstrom’s Method to the Conduc- 
tivity of Wood. By C. G. Knott and A. Macfarlane. 
Communicated by Professor Tait, . . . 481 
Notice of Striated Rock Surfaces on North Berwick Law. 
By David Stevenson, V.P.B.S.E, Civil Engineer, . 481 
Laboratory Notes. By Professor Tait — 
a. Photographic Records of the Sparks from a Holtz 
Machine, 484 
b. Determination of the Surface-Tension of Liquids by 
the Ripples produced by a Tuning-Fork, . . 485 
c. Capillary Phenomena at the Surface of Separation 
of two Liquids, . . . . .485 
Monday , 1 5th February 1875. 
Obituary Notice of Dr Robert Edward Grant, late Professor 
of Comparative Anatomy in University College, Lon- 
don. 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, ..... 491 
c. On the Electric Resistance of Iron at High Tem- 
peratures, . . .... 491 
Monday , ls£ March 1875. 
Biographical Notice of William Euing, Esq., E.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 H. Alleyne Nicholson, 
M.D., D.Sc., Professor of Biology in the Durham Uni- 
versity College of Physical Science, . . . 498 
Exhibition of Diagrams in illustration of the Capillary 
Surfaces of Revolution. By the President, . . 500 
Monday 15th March 1875. 
Presentation of the Makdougall Brisbane Prize to Professor 
Lister, ....... 500 
On the Diurnal Oscillations of the Barometer. By Alex- 
ander Buchan, M.A., ..... 505 
For continuation of Contents , see pp. 3 and 4 of Cover. 
