Natu 

 April 24, 



r..3] 



Index 



Phosphorus, Detection of Free White P. in F. sesqui- 

 sulphide, T. Schloesing, jun., 507 



Photochemistry of the Future, Prof. G. Ciamician, 230 ; 

 Relation of Velocity of Photochemical Reaction to 

 Incident Radiant Energy, M. Boll, 587 



Photographic Ecuatorials, Orientation of, E. Esclangon, 

 272 ; Photographic Transit Observations, R. Triimpler, 

 629 



Photography : Nature Photography, Stanley C. Johnson, 

 Prof. R. T. Hewlett, i8g ; Photography by Artificial 

 Light, J. .S. Dow, 367; Photographic Diary, 442; Tele- 

 photography, C. F. Lan-Davis, 461 ; Northern Photo- 

 graphic Exhibition, 522 ; Action of Inks on the Photo- 

 graphic Plate, G. de Fontenay, 561 ; Integrating 

 bpacimeter for Stellar Photographs, J. Baillaud, 587 ; 

 Photography of To-day, H. Chapman Jones, 644 



Photo-mechanical Process, New, A. E. Bawtree, 29 



Phylogeny : Zur Phylogenie der Primulaceenblute, Dr. S. 

 Tfienen, 381 



Physical Apparatus : Instrument for Detection of Com- 

 bustible Gases in Air, A. Philip and L. J. Steele, 114; 

 Rainbow Cup, C. V. Boys, 579 



Physical Institute, New International, Prof. E. Rutherford, 

 ■ F.R.S., 545 



Physical Laboratories : Jefferson Physical Laboratory of 

 Harvard, 172 ; National Physical Laboratory, 712 



Physical Society: Eighth Apnual Exhibition, 390; Election 

 of Officers, 706 



Physics : 



General : William Higgins and the Imponderable Ele- 

 ments, 103 ; Matter and Energy, F. Soddy, F.R.S., 187 ; 

 the Energy System of Matter, J. Weir, 187 ; L. Donald- 

 son, 187; Physik, Prof. H. Bottger, 187; Becquerel 

 Memorial Lecture at the Chemical Society, Sir O. 

 Lodge, 232 ; an Introduction to Practical Physics for 

 Colleges and Schools, Prof. E. H. Barton and Dr. 

 T. P. Black 246 ; Intermediate Physics. Prof. W. 

 Watson, F.R.S., 246; Lehrbuch der Physik, Prof. E. 

 Riecke, 24G ; Physik in graphischen Darstellungen, F. 

 Auerbach, 246 ; Physics of the Universe, Prof. W. 

 Trabert, E. Gold, 356 ; Physikalisch-technische 

 Reichsanstalt : Work in 1911, E. S. Hodgson, 446; 

 the Boy's Playbook of Science, J. H. Pepper, Dr. J. 

 Mastin, 538 ; Manuale di Fisica ad Uso delle Scuole 

 Secondarie e Superiori, Prof. B. Dessau, 538; Collected 

 Papers, Prof. James Thomson, F.R.S., Sir J. Larmor, 

 Sec.R.S. and James Thomson, Prof. J. Perry, F.R.S., 

 563 ; a Handbook of Physics, W. H. White, 567 ; a 

 Course of Physics, Dr. C. H. Draper, 567 

 Special : Properties of Water and of Mercury at High 

 Pressures at different Temperatures, Dr. Bridgeman, 

 172 ; the Cinematograph and Natural Science, L. 

 Donaldson, 187 ; Oscillations et Vibrations, A. 

 Boutaric, 187 ; Kinetic Theory of Ionised Gases and 

 Carnot's Principle, M. Gouy, 272 ; Some Unclassified 

 Properties of Solids and Liquids, A. Mallock, 349 ; 

 Remarkable Formation of Ice on a Pond, A. S. E. 

 .'\ckermann, 411 ; Simultaneous Action of Gravity and a 

 Uniform Magnetic Field on an Ionised Gas, M. Gouy, 

 428; C. G. Darwin, 420; Breath Figures. Lord Ray- 

 leigh, O.M.. F.R.S., 436; Dr. J. Aitken, F.R.S., 619; 

 Equation of State, Prof. Onnes and Dr. Keesom, 493 ; 

 Emission of Particles by Heated Metals, D. M. Shaw, 

 594 ; Optical Activity and Enantiomorphism of Mole- 

 cular and Crystal Structure, T. V. Barker and J. E. 

 Marsh, 612 ; Determination of Vapour Densities at 

 High Temperatures and a New Manometer, Dr. G. E. 

 Gibson, 638; Interpretation of Radium, F. Soddy, 671 ; 

 Studies in Radio-activity, Prof. W. H. Bragg, F.R.S., 



694 

 See also British Association and branch headings 

 Physiography : Monograph on the Sub-Oceanic Physio- 

 graphy of the N. Atlantic Ocean, Prof. Ed. Hull, 

 F.R.S., Prof. J. W. W. Spencer, 32 ; Physiography for 

 High Schools, A. L. Carey and others. Prof. G. A. J. 

 Cole, 159 ; New South Wales, A. W. Jose and others, 



.•582 

 Physiological Chemistry, Dr. L. Pincussohn, 592 

 Physiologiojl Optics, Practical Exercises in. Dr. G. J. 

 Burch. F.R.S.. 187; Retinal Shadows? R. M. Deeley, 

 594 ; C. Welborne Piper, 682 ; see also Colour Vision 



Physiology : Schutzfermentc des tierischen Organisnius, E. 

 Abderhalden, 66 ; les Parathyroides, L. Morel, 66 ; le 

 Gout et rOdorat, J. Larguier des Bancels, 66; 

 Physiology of Protein Metabolism, Dr. E. P. Cathcart, 

 66; Late .\wakening of Bulbar Centres, P. Bonnier, 

 377 ; Assimilation of Nitrogen by Pupa;, Prof. Grafin 

 von Linden, 379 ; Richtlinien des Entwicklungs- und 

 Vererbungs-problenis, Prof. A. Greil, A. E. Crawley, 

 380 ; Destruction of Alkaloids by Body Tissues. 523 ; 

 Experim'ental Physiology, Prof. E. A. Schafer, F.R.S., 

 539 ; Internal Secretion and the Ductless Glands, Prof. 

 Swale Vincent, 569; Physiology of Printing, 651; 

 Influence of Resilience of the Arterial Wall, S. R. Wells 

 and L. Hill, 662 ; New Ganglion in the Human 

 Temporal Bone, A. A. Gray, 662 ; Nervous Rhythm 

 arising from Rivalry between Antagonistic Reflexes, 

 Prof. C. S. Sherrington, 716; Liberation of Ions and 

 Oxygen Tension of Tissues, Dr. H. E. Roaf, 716; see 

 also British Association 



Physiology, Nutritional, Prof. P. G. Stiles, 668 



Physiology, Plant : Ueber eine Methodc zur direkten 

 Bestimmung der Oberflachenspannung der Plasmahaut 

 vcn Pflanzenzellen, F. Czapek, F. F. Blackman, 201 ; 

 Influence of Removal of the Sex Organs on Formation 

 of Sugar in Stems of Maize and Sorghum, E. Heckel, 

 272 ; Respiration in Plants, L. Maquenne and E. 

 Demoussy. 273, 428, 455, 586; Urea. R. Fosse, 299; 

 Influence' of Temperature on Absorption of Water by 

 Seeds, Prof. A. J. Brown and F. P. Worley, 350; 

 Periodicity in Plants, R. A. Robertson and Miss R. 

 Crosse, 428; Luminosity in Plants. Prof. H. Molisch, 

 441 ; die Reizbewegungen der Pflanzen, Dr. E. G. 

 Pringsheim, 483 ; the Cotton Plant in Egypt, W. L. 

 Balls, 667 



Pianoforte Touch, Dynamics of. Prof. G. H. Bryan 

 F.R.S., 716 



Pigments used in Illuminated MSS., Dr. A. P. Laurie, 399 



Pipes, Resistance to Flow of Air through. Prof. A. H. 

 Gibson, 368 



Plaice Fisheries of the North Sea, 2S3 



Planets and their Satellites, Origin of, Kr. Birkeland, 324 ; 

 C. Stormer, 42S 



Plankton Investigations, 94; Plankton of Sydney Water- 

 supply, G. I.^Playfair, 213; Plankton of Lough Neagh, 

 W. J. Dakin and Miss Latarche, 402 ; Plankton from 

 Christmas Island, G. P. Farran, 6go 



Plant Growth : Stimulation of Plant Growth, Prof. H. E. 

 Armstrong, 113; Action of Coumarin, Vanillin, and 

 Quinone on Plant Growth, Drs. Schreiner and Skinner, 

 474; Influence of Uranium and Lead on Plant Growth, 

 J. Stoklasa, 587 



Plants : Photochemical Action on Plants, Prof. G. 

 Ciamician, 230 ; Plants producing Hydrocyanic Acid, M. 

 Mirande, 213, 273; Irritability, Dr. E. G. Pringsheim, 

 483 ; Osmotic Pressures in PJants, Prof. H. H. Dixon 

 and W. R. G. Atkins, 506 ; Plant Assimilation and 

 Light, A. Miintz, 664 ; see also Physiology, Plant 



Platinum : Reported Discovery near Nelson in British 

 Columbia Discredited, 231 ; Diffusive Power of 

 Platinum Black, C. F^ry, 455 



Platypus, J. A. Kershaw, 492 



Pliocene, Marine Molluscs in West European, Dr. J. P. 

 Tesch, 230 



Pneumocysts of Carini in Rats, M. and Mme. P. Delanoe, 

 213 



Poisonous Fungi, qi : J. Parisot and M. Vernier, 1S4 



Poliomyelitis, Prof. S. Flexner, 289 



Polymerisation of Butadiene and Isoprene, Prof. W. H. 

 Perkin, Prof. Morgan, 194 



Polymorphism in a Group of Mimetic Butterflies of ths 

 Ethiopian Genus Pseudacrsea, Prof. E. B. Poulton, 

 F.R.S., 37 



Polynesian Migrations, Prof. J. M. Brown, 599 



Port Erin Marine Biological Station, 629 



Portuguese Man-of-war and a Giant Spider-crab in the 

 EnglisTi Channel, J. H. Orton, 700 



Positive Rays applied to Chemical Problems, Sir J. J. 

 Thomson, 663 



Potassium, Estimation of, in Fertilisers and Soil E'tnicts, 

 W. A. Davis. 441 



Potato Spraying, Mr. Mackintosh, 174 



