494 Index 



Conduction of Heat, Symbolical methods in the theory of (BROanviCH), 411. 



Conies, focal. Property of (Baker), 122. 



Convex Solids in Higher Space (Burnside), 437. 



Cooling of a SoUd Sphere "vvith a Concentric Core of a Different Material 



(Carslaw), 399. 

 CoTTiNGHAM, E. T., see Eddington, a. S. 

 Craies, L. v.. Elected Associate 1919, October 27, 213. 

 Cramer, H., On the distribution of primes, 272. 

 Crown-gall fungus of Lucerne, Biology of (Line), 360. 

 Cubic curves. Construction of the ninth point of intersection of two plane 



(Baker), 131. 

 Cunningham, E., Elected Fellow 1920, February 23, 215. 

 Cynipid hyperparasite of Aphides (Havtland), 235. 



Darwin, C. G., Lagrangian Methods for High Speed Motion, 56. 



Decapod crustaceans. Mouth parts of certain (Borradaile), 478. 



Deserts, Animal oecology in (Buxton), 388. 



Dewing, E. S., Elected Fellow 1920, November 22, 486. 



Diptera, Type of male secondary characters in the (Lamb), 475. 



Diptera, Venational abnormahties in the (Lamb), 393. 



Double six of lines by projection from four dimensions (Baker), 133. 



Dragon-flies, Soaring flight of (Hankin), 460. 



Earwig {Forficula auricularia). Food plants of (Brindley), 50. 



Eddington, A. S., and Cottingham, E. T., Photographs of a Solar Prominence 



taken during the eclipse of 1919 May 29, 214. 



The theory of relativity and recent eclipse observations, 214. 



Electrodynamics, Transformation of the equations of, in the Maxwell and in 



the Einstein forms (Baker), 166. 

 Electrons, Velocity of X-ray (Whiddington), 442. 

 Electroscope, Shadow (Whiddington), 109. 

 EUipsoids, Stability of rotating Uquid (Baker), 190. 

 Ellis, C. D., Elected Fellow 1920, November 22, 486. 

 Evans, U. R., Elected Fellow 1920, November 22, 486. 

 Explosion experiments (Lees), 285. 



Fenton, H. J. H., and Berry, A. J., Studies on Cellulose Acetate, 16. 



Fhght, Soaring, Problem of (Hankin and Page), 219. 



Fhght, Soaring, of Dragon-flies (Hankin), 460. 



Fluids, Rotating (Taylor), 326. 



Focal Conies, Property of (Hanumanta Rao), 434. 



Focal Hues formed by a zone plate (Searle), 330. 



Food plants of the Common Earwig {Forficula auricularia) (Brindley), 50. 



Fowler, R. H., and Lock, C. N. H., The Origin of the Distm-bances in the 



Initial Motion of a Shell, 311. 

 Function [x] (Brun), 299. 



