Contents. vii 
PAGE 
23. Some New Types of Spectrophotometer on the “ Flicker” Principle. By James 
Robert Milne, D.Sc. Issued separately July 14, 1913,. . . . 257 
24. The Scattering of Light by Ground Glass. By James Robert Milne, D.Sc. 
(With Two Plates.) Issued separately July 16, 1913, . . . . 264 
25. On the Compressibilities of Dilute Solutions of certain Inorganic Salts. By 
W. Watson, M.A., B.Sc., Carnegie Research Fellow in Physics, 1910-1912. 
Communicated by The General Secretary. Issued separately July 17, 1913, . 282 
26. Plane Strain in a Wedge, with Applications to Masonry Dams. By S. D. 
Carothers, A.R.C.Sc.I. Communicated by The General Secretary. Issued 
separately September 5, 1913, ...... . 292 
27. On some Pseudo-hermaphrodite Examples of Daphnia pulex. By J. H. Ash- 
worth, D.Sc., Lecturer in Invertebrate Zoology in the University of Edin- 
burgh. Issued separately September 5, 1913, . . . . . 307 
28. Atmospheric Electric Potential Results at Edinburgh during 1912. By G. A. 
Carse, M.A., D.Sc., and G. Shearer, M.A., B.Sc. Issued separately December 
8, 1913, . . . . . . . . . .317 
Obituary Notices — 
John M‘Arthur, F.C.S., 333 
Professor Andrew Jamieson, M.Inst.C.E., ..... 334 
R. H. Traquair, M.D., LL.D., F.R.S., ...... 336 
Robert M. Ferguson, Ph.D., LL.D., ...... 342 
Appendix — 
Proceedings of the Statutory General Meeting, 1912, * . . . 349 
Proceedings of the Ordinary Meetings, Session 1912-1913, . . . 350 
Laws of the Society, ........ 356 
The Keith, Makdougall-Brisbane, Neill, and Gunning Victoria Jubilee Prizes, . 361 
Awards of the Keith, Makdougall-Brisbane, Neill, and Gunning Victoria Jubilee 
Prizes, .......... 363 
The Council of the Society at October 1913, ..... 368 
Alphabetical List of the Ordinary Fellows of the Society at 1st January 1914, . 369 
List of Honorary Fellows of the Society at 1st January 1914, . . . 386 
List of Ordinary Fellows of the Society elected during Session 1912-1913, . 388 
Honorary Fellows and Ordinary Fellows deceased and resigned during Session 
1912-1913 ......... 388 
Accounts of the Society, Session 1912-1913, ..... 389 
List of Library Exchanges, Presentations, etc., at 1st January 1914, I., II. . 395 
List of Periodicals, etc., purchased by the Society, III. . . . 423 
Index, ........... 428 
