PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
SESSION 1912-13. 
Part II.] YOL. XXXIII. [PP- 129-224. 
CONTENTS. 
NO. PAGE 
XII. The Absorption of Light by Inorganic Salts. No. IX. : 
Solutions of Copper, Nickel, and Cobalt Salts in Alcohol 
and in Acetone. By R. A. Houstoun, M.A., Ph.D., D.Sc., 
and A. H. Gray, M.A., B.Sc., Research Student in the 
University of Glasgow, ..... 137 
( Issued separately April 22, 1913.) 
XIII. The Absorption of Light by Inorganic Salts. No. X. 
By R. A. Houstoun, M.A., Ph.D., D.Sc., and Chas. 
Cochrane, Thomson Experimental Scholar in the Uni- 
versity of Glasgow, . . . . . .147 
(. Issued separately April 22, 1913.) 
XIV. The Absorption of Light by Inorganic Salts. No. XI. : 
Conclusion. By R. A. Houstoun, M.A., Ph.D., D.Sc., . 156 
{Issued separately April 22, 1913.) 
XV. On the Occurrence of Functional Teeth in the Upper Jaw 
of the Sperm Whale. By James Ritchie, M.A., D.Sc., 
Royal Scottish Museum ; and A. J. H. Edwards, National 
Museum of Antiquities. {Communicated by Sir Wm. 
Turner.) (With One Plate), . . . . .166 
{Issued separately April 22, 1913.) 
XVI. On the Electron Theory of Thermo-electricity. By John 
M‘Whan, M.A., Ph.D., Assistant to the Professor of Mathe- 
matics in the University of Glasgow. {Communicated by 
Professor A. Gray, F.R.S.), 169 
{Issued separately April 22, 1913.) 
EDINBURGH: 
Published by ROBERT GRANT & SON, 107 Princes Street, and 
WILLIAMS & NORGATE, 14 Henrietta Street, Covent Garden, London. 
MDCCCCXIII. 
r\\a.n 
Price Five Shillings and Sevenpence. 
