146 
Tree-planting in towns and neigh- 
bourhood, discussion by Lord 
Provost H. Alexander, Sir J. 
Stirling-Maxwell, Maj. S. S. 
Steel, W. Dallimore, W. B. Clark, 
Col. J. D. Sutherland, 390, 471, 
472. 
Tropics, use of bright metallic 
surfaces for increasing human 
comfort in, by G. P. Crowden, 
289, 463. 
Turner, E. O., Motor horns, 
effective and offensive, 350, 469. 
Uganda, social geography of western, 
by S.J. K. Baker, 333. 
Ultra-violet radiation, commercial 
production, by H. R. Ruff, 285, 
464. 
Underground water supply, by Prof. 
W.S. Boulton, 456. 
Underground water supply, dis- 
cussion by Prof. W. S. Boulton, 
Prof. P. G. H. Boswell, Sir A. E. 
Kitson, Prof. W. G. Fearnsides, 
Prof. G. Hickling, L. H. Tonks, 
Dr. S. W. Wooldridge, 308, 465. 
Unemployment relief, economic 
anomalies, by Miss E. F. Steven- 
son, 340. 
Unified field-theories in physics, 
discussion by Prof. E. T. Whit- 
taker, Dr. W. H. McCrea, Dr.J.H. 
C. Whitehead, 278. 
Universities, science at, 
by HH. - T. 
Tizard, 207, 392*. 
VaucuHan, Dr. W. W., Development 
of post-primary education during 
present century, 395*. 
on Educational research, 267. 
Veddahs of Ceylon, anthropology, 
by Prof. W. C. O. Hill, 361, 469. 
Vegetables, botanical work on cold 
storage, by Prof. V. H. Blackman, 
389%. 
Vegetation, influence of grazing 
upon, by E. Wyllie Fenton, 404, 
472. 
VERNON, Dr. P. E., Perseveration 
tests and concept of levels in 
temperament testing, 373, 471. 
INDEX 
VersLuys, Prof. J., Distribution of 
marine animals and history of 
continents, 317, 467. 
Virus diseases in plants, by Dr. J. 
Caldwell, 383, 472. 
Vision, theory of, by Dr. 
Edridge-Green, 367, 470. 
Visual methods for presentation of 
statistical data, discussion by 
A.G.H. Dent, M. Barr, 343, 467. 
Visual sensation, physiological basis, 
by Dr. Ivy Mackenzie, 367. 
Vitamin C, discussion by Prof. A. 
Harden, Prof. A. Szent-Gy6érgyi, 
Dr. E. L. Hirst, E. Gordon Cox, 
Dr. T. Reichstein, Prof. W. N. 
Haworth, 292, 464, 465. 
Vitamins of milk, by Dr. S. K. Kon, 
301, 465. 
Vocational guidance, Borstal experi- 
ment, by A. Rodger, 377. 
Vocational guidance experiment in 
Fife, by the National Institute of 
Industrial Psychology, 377. 
Vocational guidance methods in 
Berlin, by Miss J. A. Wales, 376, 
471. 
Vocational guidance surveys, by 
C. A. Oakley, 377, 472. 
Vocational tests, report on, 264. 
Voice in vertebrates, evolution, by 
Prof. J. Tait, 368. 
von EcCKERMAN, Prof. H., Age of 
Moine and Dalradian formations, 
306, 465, 466. 
F. W. 
Watsts, Miss J. A., Vocational 
guidance methods in Berlin, 376, 
471. 
Wales, s5o0-ft. platform in N., by 
Dr. C. A. Matley, 314. 
Watxer, Dr. F., Limestone-diorite 
contact near Dorback Lodge, 313. 
Wa txer, Dr. N. T., Recent develop- 
ments in educational research, 
392, 472. 
Water, underground supply, by Prof. 
W.S. Boulton, 456. 
Water, underground supply, dis- 
cussion by Prof. W. S. Boulton, 
Prof. P. G. H. Boswell, Sir A. E. 
Kitson, Prof. W. G. Fearnsides, 
Prof. G. Hickling, L. H. Tonks, 
Dr. S. W. Wooldridge, 308, 465. 
