CONTENTS. V 



1921. PA.GE 



Feb. 4. — A. D. Waller — The Electrical Expression of 



Human Emotion ... ... 283 



„ 7.— General Meeting 294 



„ 11. — F. W. Aston — Isotopes and Atomic Weights ... 291) 



„ 18.— S. J. Solomon — Strategic Camouflage 310 



„ 25.— John Buchan — The American Civil War ... 314 



March 4.— W. A. Tait — Severn Crossings and Tidal Power... 315 



„ 7. — General Meeting ... ... ... ... ••• 327 



„ 11. — John Freeman — Medical Idiosyncracies ... ... 331 



„ 18.— Sir Frederick Bridge — Researches of a Musical 



Antiquarian ... ... ... ... ••• 332 



April 4. — General Meeting ... ... ... ... ••• 337 



„ 8.— R. H. A. Plimmer— Quality of Protein in Nutri- 

 tion 341 



„ 15. — Ernest Law — Wolsey as War Minister 350 



„ 22.— Sir James Walker — Electro-Synthesis in Organic 



Chemistry ... ... ... ••• — 351 



„ 29.— Sir Frank Watson Dyson— Advances in Astro- 

 nomy ... ... ... ••• ••• ••• 354 



May 1. — Annual Meeting ... ... ••• ••• ••• 357 



„ 6.— Sir Robert Robertson— War Developments of 



Explosives ... ... ... ••• ••• 358 



„ 9. — General Meeting ••• '^6 



13.— William Bateson — The Determination of Sex ... 370 



