INDEX. 
Accounts of the Society, Session 1918-19, 269. 
Additions to Library by Gift or Purchase, 298. 
Adsorption Isotherm at Low Concentrations, by 
A. M. Williams, 48-55. 
Analysis of an Electron-Transference Hypothesis 
of Chemical Yalency and Combination, by 
John Marshall, 209-233. 
Anticyclones and Depressions, Origin of, by 
John Logie, 56-77. 
Appeal to Fellows for Subscriptions to aid 
Publications, etc., 258. 
Arrays, Determinant of the Primary Minors of 
a Special Set of (n— l)-by-w, by Sir Thomas 
Muir, 35-40. 
Awards of Prizes, 263. 
Blood, Some Conditions influencing the Reaction 
Velocity of Sodium Nitrite on, by C. R. 
Marshall, 149-156. 
Bonavia-Hunt (Henry George), Obituary Notice 
of, 10-13. 
Chancellor of the Exchequer, Memorandum to 
Treasury for increased Government grant, 256. 
Reply to Memorandum for increased 
Government grant, 257. 
Society’s Reply to, 257. 
Chemical Valency and Combination. Analysis 
of an Electron-Transference Hypothesis of, 
by John Marshall, 209-233. 
Circulants, Factors of, by W. H. Metzler, 41-47. 
Concentrations, Low, Adsorption Isotherm at, 
by A. M. Williams, 48-55. 
Council, List of, at October 1918, 1919, 252, 
275. 
Crawford (William Caldwell), Obituary Notice 
of, 13. 
Depressions, Origin of Anticyclones and, by 
John Logie, 56-77. 
Determinant of the Primary Minors of a Special 
Set of ( n - 1 )-by-?& Arrays, by Sir Thomas 
Muir, 35-40. 
Dickinson (Walter G. B.), Obituary Notice of, 
16-17. 
Dimorphism in Myzus ribis, by Maud D. 
Haviland, 78-112. 
Dobbin (Leonard). On the Presence of Formic 
Acid in the Stinging Hairs of the Nettle, 
137-142. 
Dynamics, Analytical, The Connexion between 
Hamilton’s Principle, Lagrange’s Equations, 
and the Modified Function in, by G. H. 
Livens, 113-119. 
Earthquake Waves, Propagation of, through the 
Earth, and connected Problems, by C. G. 
Knott, 157-208. 
Elastic Properties of the Earth as deduced from 
the Propagation of Earthquake Waves, by 
C. G. Knott, 157-208. 
Electron-Transference Hypothesis of Chemical 
Valency and Combination, by John Marshall, 
209-233. 
Endowment of Scientific and Industrial Re- 
search, by John Horne, 1-9. 
Ethyl e£-Tartrate, Rotation in Cinnamic Alde- 
hyde and in Ethylene Bromide, by T. S. 
Patterson and K. L. Moudgill, 18-34. 
Factors of Circulants, by W. H. Metzler, 41-47. 
Fellows, Honorary, 295, 296. 
Obituary Notices of, 10-17. 
Ordinary, 276-294 
Ordinary and Honorary, deceased and 
resigned during Session 1918-19, 297. 
Ordinary, elected during Session 1918— 
19, 297. 
Formic Acid, Presence of, in Stinging Hairs of 
Nettle, by Leonard Dobbin, 137-142. 
Franklin (T. B.). The Cooling of the Soil at 
Night, with special reference to late Spring 
Frosts, 120-136. 
Fund, Special Subscription, started, 258. 
Gibson (Charles R. ). Lantern Demonstration of 
Colour Blindness : showing what the Colour- 
blind see. ( Title only), 254. 
Government grant, Application for increased, 
256. 
Grant, Memorandum for Increased, 256. 
Hamilton’s Principle and the Modified Func- 
tion in Analytical Dynamics, by G. H. Livens, 
113-119. 
Harmonic Synth etiser, A “Duplex” Form of, 
and its Mathematical Theory, by J. R. Milne, 
234-242. 
Harvey-Gibson (R. J.) and Elsie Horsman. 
Contributions towards a Knowledge of the 
Anatomy of the Lower Dicotyledons. II. The 
Anatomy of the Stem of the Berberidacese. 
( Title only), 253. 
Haseman (M. G. ). Amphicheiral Knots. ( Title 
only) , 253. 
Haviland (Maud D. ). Life-history and Bio- 
nomics of Myzus ribis, 78-112. 
Horne (John). The Endowment of Scientific 
and Industrial Research, 1-9. 
303 
