E iv ] 
V. On Osmotic Pressures Derived f rom Vapour-Pressure Measurements: Aqueous 
Solutions of Cane Sugar and Methyl Glucoside. By the Earl of Berkeley, 
F.R.S.; E. G. J. Hartley, B.A. (Oxon); and C. Y. Burton, B.Sc. 
( London) . page 295 
VI. The Ultra-Violet Band of Ammonia, and its Occurrence in the Solar Spectrum. 
By A. Fowler, F.R.S., Professor of Astrophysics, and C. C. L. Gregory, 
B.A., Research Student, Imperial College, South Kensington . . . . 351 
VII. Surface Reflexion of Earthquake Waves. By George W. Walker, A.R.C.Sc., 
M.A., F.R.S., formerly Fellow of Trinity College, Cambridge .... 373 
VIII. Monoclinic Double Selenates of the Iron Group. By A. E. H. Tutton, D.Sc., 
M.A., F.R.S . 395 
Index to Volume 
441 
