INDEX 
TO THE 
PHILOSOPHICAL TRANSACTIONS.. 
Series A, Vol. 218 . 
B. 
Bakerian Lecture, 1917 (Jeans), 157. 
Berkeley (Earl of), Hartley (E. G-. J.) and Burton (0. Y.). On Osmotic Pressures derived from Vapour-pressure 
Measurements: Aqueous Solutions of Cane Sugar and Methyl Glucoside, 295. 
Bouseield (W. R. and C. E.). The Specific Heat of Aqueous Solutions, with Special Reference to Sodium and Potassium 
Chlorides, 119. 
Burton (C. Y.). See Berkeley (Earl of), Hartley and Burton. 
0 . 
Chatman (S.). The Solar and Lunar Diurnal Variations of Terrestrial Magnetism, 1. 
E. 
Earthquake waves, surface reflexion of (Walker), 373. 
F. 
Fog-signal machinery, acoustic efficiency of (King), 211. 
Fowler (A.) and Gregory (C. C. L.). The Ultra-violet Band of Ammonia, and its Occurrence in the Solar Spectrum, 351. 
G. 
Gregory (C. C. L.). See Fowler (A.) and Gregory. 
H. 
Hartley (E. G. J.). See Berkeley (Earl of), Hartley and Burton. 
Heat, specific, of aqueous solutions (Bouseield), 119. 
J. 
Jeans (J. H.), Bakerian Lecture, 19x7.—The Configurations of Rotating Compressible Masses, 157. 
3 N 
VOL. CCXVIII.-A. 
[Published July 21, 1919. 
