PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
SESSION 1912-13. 
Part I.] VOL. XXXIII. [Pp- 1-128. 
CONTENTS. 
NO. PAGE 
I. On a Method of determining Vapour Densities at High 
Temperatures, and on a new form of Quartz Manometer. 
By G. E. Gibson, B.Sc., PPi.D. (Carnegie Fellow, 1912). 
{Communicated by Professor John Gibson), . . 1 
{Issued separately January 17, 1913.) 
II. The Hydroid Zoophytes collected by the British Antarctic 
Expedition of Sir Ernest Shackleton, 1908. By James 
Ritchie, M.A., DSc., Royal Scottish Museum, Edinburgh. 
{Communicated by W. Eagle Clarke, F.L.S.), . . 9 
( Issued separately February 13, 1913.) 
III. The Absorption of Light by Inorganic Salts. No. VII. : 
Aqueous Solutions of Iron Salts. By John S. Anderson, 
M.A., B.Sc., 1851 Exhibition Research Scholar (Glasgow). 
{Communicated by Dr R. A. Houstoun), . . .35 
{Issued separately February 13, 1913.) 
IV. The Absorption of Light by Inorganic Salts. No. VIII. : 
Alcoholic Solutions of Copper, Cobalt, and Nickel Salts 
in the Ultra-Violet. By Alex. R. Brown, M.A., B.Sc., 
Carnegie Research Scholar in the University of Glasgow. 
{Communicated by Dr R. A. Houstoun), . . .44 
{Issued separately February 13, 1913.) 
V. The Theory of Axisymmetric Determinants from 1857 to 
1880. By Thomas Muir, LL.D., . . . .49 
{Issued separately March 15, 1913.) 
[Continued on page iv. of Cover 
EDINBURGH : 
Published by ROBERT GRANT & SON, 107 Princes Street, and 
WILLIAMS & NORGATE, 14 Henrietta Street, Coyent Garden, London. 
MDCCCCXIII. 
Price Seven Shillings and Tenpence. 
APR 25 
