VI 
Contents. 
13. The Reflective Power of Pigments in the Ultraviolet. By Charles Cochrane, 
M.A., B.Sc., Assistant to the Professor of Natural Philosophy in the University 
of Glasgow. Communicated by Dr R. A. Houstoun. Issued separately May 21, 
1915, .......... 
14. The Theory of the Gyroscope. By Professor H. Lamb, F.R.S. Issued separately 
May 25, 1915, ......... 
15. The Densities and Degrees of Dissociation of the Saturated Vapours of the 
Ammonium Halides. By Professor Alexander Smith and Robert H. Lom- 
bard. Issued separately May 22, 1915, ..... 
16. On a Modification of Pelouze’s Method for determining Nitrates. By Professor 
E. A. Letts and Florence W. Rea. Issued separately June 24, 1915, . 
17. Quaternion Investigation of the Commutative Law for Homogeneous Strains. 
By Frank L. Hitchcock. Communicated by Dr C. G. Knott, General Secretary. 
Issued separately July 8, 1915, . 
18. On the Functions which are represented by the Expansions of the Interpolation- 
Theory. By Professor E. T. Whittaker, F.R.S. Issued separately July 13, 
1915, .......... 
19. On the Composition of Milk as affected by Increase of the Amount of Calcium 
Phosphate in the Rations of Cows. By A. Lauder, D.Sc., and T. W. Fagan, 
M.A. Issued separately September 21, 1915, ..... 
20. On a See-Saw of Barometric Pressure, Temperature, and Wind Velocity between 
the Weddell Sea and the Ross Sea. By R. C. Mossman. Issued separately 
September 21, 1915, ........ 
21. The Magnetic Quality of Iron and Steel as affected by Transverse Pressure. By 
Win. J. Walker, B.Sc. Communicated by Professor W. Peddie. Issued 
separately December 3, 1915, . 
22. The Interaction of Methylene Iodide and Silver Nitrate. By Professor C. R. 
Marshall and Elizabeth Gilchrist, M.A., B.Sc. Issued separately December 3, 
1915, .......... 
23. A Comparative Study of the Reflexes of Autotomy in Decapod Crustacea. By 
J. Herbert Paul, M.A., B.Sc. (From the Physiological Department of the 
University of Glasgow, and the Marine Laboratories at Millport and Culler- 
coats.) Communicated, by Professor Noel Paton. Issued separately December 4, 
1915, .......... 
24. Chalk Boulders from Aberdeen and Fragments of Chalk from the Sea Floor off 
the Scottish Coast. By the late William Hill, of Hitchin, F.G.S. Com- 
municated by Professor D’Arcy W. Thompson. Issued separately December 14, 
1915, .......... 
25. Notes on the Structure of the Chalk occurring in the West of Scotland. By the 
late William Hill, of Hitchin, F.G.S. Communicated by Professor D’Arcy W. 
Thompson. Issued separately December 14, 1915, . . , . 
Obituary Notice — 
Sir John Murray, K.C.B., LL.D., Ph.D., D.Sc., F.R.S., etc.. 
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