Saturf, 

 February 2, 192 



.] 



Index 



XXIX 



Photometer, The " Eder-Hecht," 550 



Photosynthesis, Prof. E. C. C. Baly, Prof. I. M. Heilbron. 

 and \V. F. Barker, ^54 ; and the Electronic Theory, 

 II., Prof. H. H. Dixon and X. G. Ball, 590 



Photosynthetic Processes in the Air, etc., in relation to 

 the Origin and Continuance of Life on the Earth, 

 Prof. B. Moore, 383 



Physical Effects possibly produced by Vision observed by 

 Dr. Russ, Dr. H. Hartridge, 22- 



Physical Science at the British Association, 448 



Physico-chemical Symbols, International, Prof. A. Find- 

 ' lay, 474 



Physics : A Text-book of, Edited by Prof. A. W. Dufif. 

 Fifth edition, 365 ; Institute of. Election of Board, 

 287 ; Problems of. Prof. O. W. Richardson (Presi- 

 dential Address to the Mathematics and Physics 

 Section of the British Association), 56, 372 



Physiological Phenomenon, A Curious, F. C. Dannatt, 

 Prof. T. Graham Brown, 529 



Physiology : Human, Prof. L. Luciani (in five volumes). 

 Vol. 5, Metabolism — Temperature — Reproduction, etc. 

 Edited by Prof. M. S. Pembrey, 204 ; Practical, for 

 Students of Medicine, Advanced Lessons in. Dr. R. 

 Burton-Opitz, 143 ; The Role of, Sir Walter M. 

 Fletcher, 59 



PhytophtJiora infestans. The Binomics of the Conidia of, 

 P. A. Murphy, 590 



Pickering Series in O Type Stars, The, H. H. Plaskett, 209 



Piezo-electricity ?, Muscular, E. W. Russell, 275 ; F. 

 Buchanan, 340 



Pilot-balloons : at Great Heights, the Beha\'iour of, 

 X. K. Johnson, 453 ; The Variation of the Velocity 

 of Ascent of, with Altitude, C. E. Brazier, 389 



Piperitone, Position of the Double Linkage in, A. R. 

 Penfold, 199 



Pipettes, X'ote on, V. Stott, 590 



Pisidium clessini in British Lochs, A. W. Stelfox, 40 



Plague Eradication in India, Experiments on. Major 

 J. C. G. Kunhardt and Asst. -Surgeon G. D. Chitre, 



587 



Planets, Minor, M. Michkovitch, Prof. M. Wolf, 69 ; 

 E. Xoteboom, K. Schiitte, 256 



Plankton, Illumination of, Lt.-Commdr. G. C. C. Damant, 

 42 



Plant : Biochemistry, 364 ; Diseases and their Relation 

 to Diseases in Man, Prof. V. H. Blackman, 289 ; 

 Distribution, Relation of the Hydrogen-ion Con- 

 centration of the Soil to. Dr. W. R. G. Atkins, 80 ; 

 X. M. Comber, 147 ; -organism. Functions of the, 

 V. Grafe, 317 ; Products, An Introduction to the 

 Chemistry of. Vol. i : On the X'ature and Significance 

 of the Commoner Organic Compounds of Plants, 

 Dr. P. Haas and T. G. Hill. Third edition, 138 



Plantation Rubber Research, 35 



Plants, The Theory of Descent in Relation to the Early 

 Historv of. The Present Position of. Dr. D. H. Scott, 

 60 



Platinum Metals, The, A. D. Lumb, 268 



Plomb du Cantal, The, A Large Independent Volcano, 

 P. Glangeaud, 454 



Polygons to generate Diagrams of Maximum Stress, 

 T. Alexander and J. T. Jackson, 421 



de Pontecoulant Prize of the Paris Academy awarded to 

 Dr. A. C. D. Crommelin, 223 



Population Returns of Urban Areas and Towns, C. B. 

 Fawcett, 165 



Porphyry-quartz from the Esterel Mountains twinned on 

 the Face (10T2), Dr. J. Drugman, 388 



Potato-juice, The Antiscorbutic Principle in, extracted 

 in Presence of Acids, M. BezssonofT, 135 



Potatoes and Pigs with Milk as the Basis of Britain's 

 Food Supply, Lord Bledisloe, 393 



Powder, A Flashjess and Smokeless, 222 



Prehensility, A Factor of Gaseous Adsorption, H. Briggs, 



485 

 Pressure on Resistance, The Effect of, P. W. Bridgman, 



294 

 Pressures created in Insulating Fluids, The Variation with 



Time of the, by a Constant Electrostatic Field, L. 



Bouchet, 454 

 Priestley in America, 1 794-1804, Prof. E. F. Smith, 



Sir T. E. Thorpe, 394 

 Primitive Groups, Part i. Prof. W. A. Manning, 39 

 Princess Beans of Prof. Johannsen, Breeding Experiments 



with. Miss I. Leitch, 578 

 Prix le Conte, The, awarded to G. Claude and devoted by 



him to the Societe de Secours des Amis des Sciences 



and the Research Laboratories of the College de 



France, 477 

 " Prizma " Process of Colour Cinematography, E. R. 



]Mason-Thompson, 225 

 Psychiatry, The Bcisis of. Dr. A. C. Buckley, 362 

 Psychological : " As Ifs," Some, 525 ; Medicine, 362 ; 



Tests for Vocational Guidance, Dr. C. W. Kimmins 



and others, 321 

 Psychology : and Mystical Experience, Prof. J. Howley, 



525 ; of Phantasy, Collected Papers on the, Dr. 



Constance E. Long, 525 

 Punjab, Canals of the, Lieut. -Col. A. O'Brien, 478 

 Pure : Substances, The Impurity of. Prof. F. G. Donnan, 



298 ; Thought and the Riddle of the Universe. 



F. Sedlak. Vol. i, Creation of Heaven and Earth, 9 



Quanta, Escapements and. Sir Joseph Larmor, 254 

 Quantum, The : Faraday and. Dr. H. S. Allen, 341 ; 



Theory, Chemical Reactivity and the. Dr. E. K. Rideal, 



259 ; C. G. Dar\vin and others, 449 

 Quartz, " Smoky," Prof. C. V. Raman, 81 

 Queensland : Gems presented to the Prince of Wales, The, 



B. Dunstan, 289 ; Mesozoic Insects of, No. 8. 



Hemiptera Homoptera (continued), Dr. R. J. Till- 



yard, 103 

 Quest, The : to carry out Meteorological Investigations, 



66 ; Departure of the, 162 ; Change of Plans of the, 



478 



R 38, Proposed Fund for Airship Research in memorj- ot 



the Loss of, 189 

 Radcliffe Observatory, Meteorological Observations made 



at the, 192 

 " Radiant " Spectrum, The : Prof. C. V. Raman, 12 ; 



Dr. H. Hartridge, 467 ; observed by Sir David 



Brewster, Prof. C. V. Raman, 485 

 Radiation : and Absoption by Atoms with Modified 



Svstems of Extra-nuclear Electrons, Prof. J. C. 



McLennan, 448 ; and Chemical Action, T. W. J. 



Taylor, 210 ; Prof. W. C. McC. Lewis, 241 

 Radio-active : Elements, The Oxidising Properties of 



certain, P. Lemay and L. Jaloustre, 454 ; Emanation 



in the springsof Bagnoles-de-l'Omeand its Neighbour- 

 hood, A New, P. Loisel, 454, 517 

 Radio : Communication with Australia, 543 ; Elements, 



Thelsotopyof the. Dr. M. L. X^euburger, 180 ; -gonio- 



metry. The Use of, in the Study of Storms and of 



Atmospheric " Parasite " Currents, E. Rothe, 422 ; 



-graphers. Society of. Establishment of a, 287 ; 



Messages, The X'ight Behaviour of the Heart-shaped 



Polar Diagram in connection with, G. M. Wright and 



S. B. Smith, 97 ; Xew York Central Station, Opening 



of the, 347 

 Radium: Equivalent, The Designation of the, N. E. 



Dorsev, 40 ; from Czecho-Slo\'Bkia, The Supplv of, 



287 

 Rain, Artificial Production of, Dr. H. Jeffreys, C. M. 



Hatfield, 313 

 Rainfall : Observations, October, 1920, to September, 



1921, 318 ; Records at Rotham,«ted, W. D. Christmas, 



307 ; Remarkable July, at Blue Hill, Mass., Dr. 



A. McAdie, 12 

 Rana fusca, Composition of the Egg of, at the Egg-laying 



Period, E. F. Terroine and H. Barthelemy, 294 

 Raninidae, The, A Study in Carcinology, Prof. G. C. 



Bourne, 590 



