INDEX. 



587 



Penniaii rooks of Skillaw Ulough, by 



Miss M. Woikmaii. 443, 504 (C 10). 

 Phase and pitch in localisation of tones, 



relation of, bv H. Banister, 483, oOti 



(J 9). 

 Photo-electric changes in green and 



white leaves, 488, 507 (K 13). 

 Photo-electric current in green leaves, 



conditions which detennine direction 



of, by J. C. Waller, 480, 506 (I 19). 

 Photogra2)hs of geological interest, 



lie [tort of Committee on, 307. 

 PiERcy (W.), Relations of psychology 



and economics, *483. 

 Plankton in relation to food of the 



herring, by A. C. Hardy, 449, 504 



(D 10). 

 Plankton organisms, exhibit of slides, 



by H. C. Chadwick, 450. 

 Plankton organisms, feeding of some. 



by Dr. IM. Lebour, 449, 504 (D 9). 

 Plankton, rhythmic change in, by Prof. 



J. Johnstone, 448. 

 Plurality of soils in Egypt . . ., by 



Capt. L. W. G. Malcolm, *474. 

 Polarised light, biochemical effect of, 



by Miss E. S. Semmens, 436, 504 



(B15). 

 Polychaet tubes, on two remarkable, 



by Prof. W. C. Mcintosh, 455. 

 Population and nnemployment, by Sir 



W. H. Beveridge, 138. 

 Post-naupliar development of an 



estherid crustacean, bv H. Graham 



Cannon, 453, 504 (D 25). 

 Post-war wages problems, by Prof. H. 



Clay, 460, .505 (F 3). 

 Potts (Dr. W. A.), on the delinquent 



child, 498. 

 PouLTON (Prof. E. B.), Transparent 



undersurface of wings in certain 



butterflies. 447, .504 (D 2). 

 Prankerd (Dr. T. L.), Ontogeny of 



gravitational irritability in Osmunda 



regalis, 494. 

 Precipitates, formation of, liv Prof. S. 



Oden, *432. 

 Prehistoric flint factory at Aberyst- 

 wyth, bv R. Thomas and E. Dud- 



lyke, 477. 

 Prehistoric sites in Dardanelles and 



Bosporus, by S. Casson, 475. 

 Prtdeaux (E. B. R.), Membrane poten- 

 tials considered as diffusion poten- 

 tials. 433. 

 PRIE.STLEV (Prof. J. H.), Cell wall and 



external medium, 495. 

 Protozoan parasites, invasion of tissues I 



of hiijher plants by, by Miss M. S. G. 



Breeze. 456. 

 Psvchoijrams, bv Dr. M. E. Bickers- 



teth. *483. 

 Psvcholoffv and economics, relations of. 



bv W. Piercv, *483. 



Pursuitmeter, new tvpe of, Vjv Prof. 

 E. P. Cathcart, "484. 



Qualifying and competitive tests for 



admission to secondary scliools, by 



T. Samuel, 499. 

 QuANjER (Prof. H. M.), on virus 



diseases of plants, 492, 507 (K 30b). 

 Qxiantisation. by Prof. P. Ehrenfest, 



508. 

 Quantum theory in chemistry, by Prof. 



G. N. Lewis", *432. 

 Quaternary isostatic readjustments in 



N.W. Europe, by Prof. P. F. 



Kendall, 441. 



Races of the Middle East, by T. H. 

 Walker, *474. 



Railway transportation, future of, by 

 Col. 'E. O'Brien. 463, 505 (G 5). 



Ramsden (Prof. W.). Adsorption films. 

 *482. 



Rayner (Dr. M. C), . . . Biology of 

 !Mvcorrhiza in the Ericaceae, 486, 507 

 (K5). 



Red blood corpuscles under the micro- 

 scope, by Dr. W. W. Waller, 479. 



Rees (Miss E. M.), Chromosomes and 

 sterility in Muscari, 489. 



Regeneration of roots and shoots in 

 cuttings of seakale, by Prof. W. 

 Neilson Jones. 486. 



Rehousing of slum- dwellers, by J. J. 

 Clarke, 462, 505 (F 10). 



Rendle (Dr. A. B.), on Oenothera 

 .... 421. 



Repetitive work, by Miss I. Burnett, 

 485. 



Resin canals in spruce wood, by Prof. 

 R, B. Thomson and Dr. H. B. Sifton, 

 *492. 



Reticularia lycoperdon, life-history 

 and cytology of. by Dr. ^I. Wilson 

 and :\iiss E.' J. Cadman. 488. 



Reynolds (Prof. S. H.), on photo- 

 graphs nf geological interest, 307. 



Rhinosporidium, life-history and affini- 

 ties of, bv Prof. J. H. Ashvvorth, 

 451, 504 (D 18). 



Rhoeadales, evolution and reversion in, 

 by Miss E. K. Saunders, 485, 507 

 (K 2). 



Rhythmic dancing, bv !Miss M. Einert. 

 500. .507 (L 12). 



Ehvtisma acerinum. life-history and 

 c'vtology of, by S. G. Jones, 487, 507 

 (k 9). 



Rideout (E. H.), Soils of Wirral, 501. 



RinoEWAv (Sir W.), on Boman sites in 

 Britain . 413. 



RisHBETH (0. H. T.). .Australian rail- 

 way development. 458. 505 (E 6). 



