INDEX. 
Perry (Prof. J.) on the work of the 
Corresponding Societies Committee, 
325. 
| 
| 
Persistence of vision, the effect on the, | 
of fatiguing the eye with red, orange, 
and yellow, by Prof. Frank Allen, 
410. 
PeraveL (Prof. J. E.) on the investiga- | 
tion of the upper atmosphere by means | 
of kites, 37. 
on gaseous explosions, 247. 
Prrerson, (E. G.), ascending tracts in 
the spinal cord of the cat, 646, 
Perrte (Prof. W. M. Flinders) on the col- 
lection of photographs of anthropological 
interest, 285. 
Putuies (Dr. P.), the recombination of | 
ions in air at different temperatures, 
407. 
*Photographic action of alpha rays, the, | 
by T. Kinoshita, 405. 
Photographic registration of sound waves, | 
the, by Prof. D. C. Miller, 414. 
Physical and Mathematical Section, 
Address by Prof. E. Rutherford to 
the, 373. 
*Physiological problems in agriculture, 
some, by Dr. E. J. Russell, 461. 
Physiological Section, Address by Prof. 
K. H. Starling to the, 633. 
Placer gold-mining in Canada, by J. B. 
Tyrrell, 480. 
Plant associations, the fundamental 
causes of succession among, by Prof. 
H. C. Cowles, 668. 
*Puaskert (J. S.) and W. E. Harpur, 
two curiously similar spectroscopic 
binaries, 401. 
Prummer (W. E.) on seismological in- 
vestigations, 48. 
Plymouth marine laboratory, report on the 
occupation of a table at the, 198. 
Podophyllum peltatum, the organisation 
and reconstruction of the nuclei in 
the root-tips of, by Prof. J. B. Overton, 
678. 
Polarised light, on the application of, 
to determine the condition of a body 
under stress, by Profs. §. P. Thompson 
and E. G. Coker, 585. 
Polonium, some phenomena associated 
with the radiations from, V. E. Pound 
on, 396. 
Pork (Prof. W. J.) on the study of iso- 
morphous sulphonic derivatives of ben- 
zene, 141. 
on electroanalysis, 144. 
Portrr (A. W.), electric splashes on 
photographic plates, 404. 
Porter (Dr. C.) on the effect of climate upon 
health and disease, 319. 
{Porter (Prof. J. B.) an outline of an 
investigation for the Dominion Govern- 
ment of the coals of Canada, 588. 
*Positive electricity, discussion on, 402. 
831 
Postero-septal tract, the origin and 
function of the, by Dr. W. Page May, 
644, 
Potassium chloroiridate, the analysis of, 
by E. H. Archibald, 455. 
Poutron (Prof. E. B.) on zoology organ- 
isation, 198. 
Pounp (V. E.) on some phenomena 
associated with the radiations from 
polonium, 396, 
| Poyntine (Prof. J. H.) on seismological 
investigations, 48. 
the lengthening of loaded wires 
when twisted, 409. 
the angular momentum in a beam 
of circularly polarised light, 409. 
and Dr. Guy BarLow on the pres- 
sure of radiation against the source : 
the recoil from light, 385. 
*Practical studies in elementary schools, 
by W. M. Heller, 726. 
Practical work in evening schools, by 
W. Hewitt, 731. 
Practical work in higher education, by 
Miss H. D. Oakley, 734. 
PrarcerR (R. Lloyd) on the survey of 
Clare Island, 321. 
Pratn (Lieut.-Col. D.), Address to the 
Botanical Section, 652. 
Pre-Cambrian geology, the bearing of, 
on uniformitarianism, by Dr. A. P. 
Coleman, 473. 
Pre-Cambrian rocks of Canada, 
by Prof. W. G. Miller, 474. 
PREECE (Sir W. H.) on magnetic obser- 
vations at Falmouth Observatory, 36. 
on practical electrical standards, 38. 
on gaseous explosions, 247. 
Preferential duties, the policy of, by 
A. B. Clark, 556. 
Proteins: the relations between com- 
position and food value, by Dr. E. F. 
Armstrong, 459. 
Punnett (R. C.) on experiments in in- 
heritance, 195. 
Pyramid decussation in the sheep, the, 
by J. Luella King and Dr. Sutherland 
Simpson, 645, 
the, 
Race-types in the ancient sculptures 
and paintings of Mexico and Central 
America, by Miss A. C. Breton, 618. 
Racial types in Africa, the influences of 
geographical factors on the distribution 
of, by Dr. F. C. Shrubsall, 620. 
Radiation, the pressure of, against the 
source: the recoil from light, by 
Prof. J. H. Poynting and Dr. Guy 
Barlow, 385. 
Radio-active disintegration products, new, 
the separation of, by Dr. Otto Hahn, 
394, 
Rainfall run-off ratio in the prairies of 
Central North America, the, by Prof. 
KE. F,. Chandler, 473. 
