iv CONTENTS. 
PAGE 
VII. The Absorption of Light by Inorganic Salts. No. V. : Copper 
and the Alkali Metals. By R. A. Houstoun, M.A., Ph.D., 
D.Sc., Lecturer on Physical Optics in the University of 
Glasgow, ....... 40 
{Issued separately March 20 , 1912 .) 
VIII. The Absorption of Light by Inorganic Salts. No. VI. : The 
Cobalt Chloride Colour Change. By Alex. R. Brown, 
M. A., Carnegie Scholar in the University of Glasgow.. 
{Communicated by Dr R. A. Houstoun), . . .50 
{Issued separately March 20 , 1912 .) 
IX. Observations on the Structure and Affinities of Branchio- 
maldane vipicenti Langerhans. By J. H. Ashworth, D.Sc., 
Lecturer in Invertebrate Zoology, University of Edinburgh. 
(With One Plate), ...... 62 
"{Issued separately April 11 , 1912 .) 
X. A Method of Measuring Mental Processes in Normal and 
Insane People, with special reference to Maniac Depressive 
Insanity. By George Rutherford Jeffrey, M.D. (Glasg.), 
F.R.C.P. (Edin.), Senior Assistant Physician, Crichton Royal 
Institution, Dumfries ; late Senior Assistant Physician, 
District Asylum, Ayr. {Communicated by Sir James 
Crichton-Browne), ..... . 73 
{Issued separately April 13 , 1912 .) 
XI. An Investigation into the Effects of Seasonal Changes on 
Body Temperature. By Sutherland Simpson, M.D., D.Sc. 
(From the Physiological Laboratory of the Medical College, 
and the Department of Poultry Husbandry, New York 
State College of Agriculture, Cornell University, Ithaca, 
N. Y., U.S.A ), 110 
{Issued separately , 1912 .) 
The Papers published in this Part of the Proceedings may be 
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No. I. . . . Price 6d. 
No. II. . . . . „ 6d. 
No. III. . . . . „ 6d. 
No. IV. . . . . „ 6d. 
No. V. . . . . Is. 
No. VI. . . . „ 6d. 
No. VII. . . 6d. 
No. VIII. . 8d. 
No. IX. . . . . 8d. 
No. X „ 2s. 2d. 
