-”” st" —— + ) oo 
INDEX. 
DarsisHirb, Prof. O. V., Air pores in 
lichens, 483. 
Darwwy, Prof. C. G., Molecular structure, 
366*, 567. 
Davey, Miss A. J., Root contraction in 
oxalis, 481, 570. 
Davies, Sir W., School broadcasting, 
508*, 
Dawsoy, Dr. S., Intelligence and fertility, 
469, 570. 
Desyez, Prof. P., Atomic distances and 
molecular structure, 365, 567. 
Conductivity and frequency in 
different solvents, 358*, 567. 
Delegates, xxi. 
Dewier, Dr. E., London as pioneer in 
university education, 499. 
Denitrification, bacterial, 
Lloyd, 489, 577. 
bye DreeB: 
_ Derbyshire caves, report on, 274. 
Descu, Prof. C. H., on Sumeridn copper, 
269. 
Development and evolution, by Prof. 
J. S. Huxley, 394*. 
Dewey, H., Geology of London district, 
367. 
Differential geometry, application to 
dynamics, by Prof. A. J. McConnell,344. 
Difficult child, by Dr. G. A. Auden, 505, 
571. 
Drxey, Dr. F. A., Evolution and natural 
selection, 394. 
Drxon, H. N., Effect of urban expansion 
on flora and fauna, 538*. 
Doss, M., Five-year plan in Russia, 418. 
Dozson, Dr. G. M. B., Atmospheric 
ozone, 357. 
Docuerty, Dr. J. G., Tensile yield in 
mild steel and iron, 440*, 568. 
Dononues, Prof. Mrs. A. C. L., Luba 
tribe in Katanga, 454*, 569. 
Dowpatt, His Hon. Judge, Psychological 
origins of law, 448, 569. 
Dover, Prof. J., Conifer morphology, 
480, 570. 
Drever, Prof. J., Nature of emotion, 
477, 570. 
Drinker, Dr. C. K., 
resuscitation, 465. 
Druce, Dr. C., Effect of urban expansion 
on flora and fauna, 538*. 
Drummonp, Prof. J. C., Chemistry of 
vitamin A, 362*, 567. 
— Chemistry of vitamin B, 363*, 567. 
Dusrevi, H., Collaboration of work 
people in production, 422, 568. 
Dunnam, K. C., Genesis of ores, 381. 
Durability of paper, by Dr. F. A. Bather, 
N. Parley, Dr. A. Esdaile, Dr. C. J. J. 
Fox, H. Jenkinson, Prof. L. J. Spencer, 
J. Strachan, Maj. J. E. Aitken, 533. 
Dynr, R. A., Genus Sutherlandia R. Br., 
482. 
Problems of 
615 
Eacurs, Dr. G. H., Viruses, artificial 
cultivation, 463*. 
Earth movements in relation to strati- 
graphy, by Prof. O. T. Jones, Prof. 
E. B. Bailey, Dr. J. Weir, Prof. W. S. 
Boulton, Prof. H. A. Brouwer, Dr. 
G. L. Elles, Dr. R. G. S. Hudson, 
D. L. Linton, Dr. E. O. Ulrich, Prof. 
P. G. H. Boswell, 374. 
Earth pressure investigations, by Prof. 
C. F. Jenkin, 439, 569. 
Earthquakes, deep-focus, by R. Stoneley, 
255, 355, 567. 
Earth’s crust, geographical problems, by 
Prof. J. W. Gregory, A. R. Hinks, 
Prof. A. Holmes, Dr. H. Jeffreys, Dr. 
G. C. Simpson, Dr. de G. Hunter, 
Dr. J. H. J. Poole, 410, 567. 
Eaton, Dr. B. J., Rubber production, 
514*. 
Eclipse of sun from Niuafoou, 1930, by 
Dr. 8. A. Mitchell, 354, 567. 
Economic man in primitive society, by 
Miss L. Mair, 457, 569. 
Eppineton, Prof. Sir A., Evolution of 
universe, 335*, 587, 566. 
Epes, A. B. B., Electrical prospecting 
instruments, 329. 
Ep@ertx, Prof. B., Memory reports, 466. 
Educational and documentary films, report 
on, 325. 
Educational development, 1831-1931, by 
Sir C. G. Robertson, 215, 499*. 
Educational training for overseas life, 
final report on, 291. 
Evies, Dr. G. L., Earth movements, 
374*. 
Ea@an, A. L., Kata conditions of air in 
deep-level mines, 437, 568. 
Egypt, report on prehistoric sites, 272. 
Electrical engineering half-century ago, 
by Prof. E. Thomson, 437, 569. 
Electrical terms and definitions, report on, 
268. 
Electricity, circulation through atmo- 
sphere, by Dr. F. J. W. Whipple, 352. 
Electrolytes, influence of medium upon 
properties, discussion by Sir H. 
Hartley, Prof. P. Debye, Prof. N. J. 
Bjerrum, Prof. J. N. Brénsted, Prof. 
K. Fajans, Prof. J. C. Philip, Dr. E. A. 
Guggenheim, Dr. J. A. V. Butler, 
Prof. G. Scatchard, Dr. E. Lange, Prof. 
J. W. McBain, Prof. T. M. Lowry, 
Dr. N. V. Sidgwick, 358*, 567. 
Electron diffraction, by Prof. G. P. 
Thomson, 327, 566. 
Etrorp, Dr. W. J., Viruses, filters and 
filtration, 463. 
Emden’s equation, integration and appli- 
cation, by D. H. Sadler, Prof. E. A. 
Milne, N. Fairclough, R. H. Fowler, 
350, 566. 
