xlvi 



Index 



r Nature, 

 yOctober 7, i 



Planet GM, The New Minor, C. Sola, 595 



Planetary Families of Comets, The, Prof. H. N. Russell, 

 467 



Plant : -cell. Structure of the, and its Metabolism, P. A. 

 Dangeard, 251 ; The Binucleate Phase in the, Dr. Agnes 

 Arber, 90; Culture in Denmark, Prof. J. K. Ravn, 761 ; 

 -forms. The Changes in, obtained experimentally, G. 

 Bonnier, 539 ; Pests in the British Empire, Legislation 

 in regard to, C. P. 'Lounsbury, 502 ; Protection Insti- 

 titute. Organisation in the U.S.A. of a, 687 



Plants: Colouring Matters of, 139; Experiments with J. B. 

 Philip, 805 ; Movements in, Experiments on, Sir Jagadis 

 Chunder Bose, 305 ; Movements of, 416 ; Researches on 

 Growth of, Sir Jagadis Chunder Bose, 615, 648; Resist- 

 ance of, to Insect Attacks, H. A. Ballou, and others, 

 503; The Apparent " Growth " of, (and of Inanimate 

 Materials), and of the Apparent " Contractility," Dr. 

 A. D. Waller, 410 ; The Geography of. Dr. M. E. 

 Hardy, 386 



Platana of the Cape Peninsula, The, C. L. Herman, 700 



Plating with Nickel of Aluminium and its Alloys, The, L. 

 Guillet and M. Gasnier, 475 



Plato's Atlantis in Palseogeography, W. D. Matthew, 667 



Pleasure-Unpleasure : An Experimental Investigation on 

 the Feeling-Elements, Dr. A. Wohlgemuth, 3 



Pleistocene Glaciation of England, Some Features of the, 

 G. W. Lamplugh, 58 



Pliocene : Floras, A Comparative Review of, based on the 

 Study of Fossil Seeds, Mrs. Eleanor M. Reid, 249 ; 

 River, a Great, on the South Side of the Himalayas, 

 Dr. G. E. Pifgrim, 836 



Plumage : Bill, The, and Bird Protection. Sir H. H. 

 Johnston ; Prof. H. M. Lefroy, 168 ; Sir Herbert Max- 

 well ; Prof. A. Dendy, 169; Dr. W. E. Collinge, 196; 

 Prof. J. E. Duerden, 263; "Talked Out," 303; 

 (Prohibition) Bill, Importation of. Second Reading 

 Carried, 366 



Plumbiferous Barytes from Shibukuro, Japan, Prof. R. 

 Ohashi, 569 



Poetry and Medicine, Prof. D'Arcy W. Thompson, 414 



Pocillopora cespitosa and Seriatopora suhlulata. The De- 

 velopment of, A. Krempf, 380 



Poles of Metallic Arcs, The Pressure upon the, including 

 Alloys and Composite Arcs, W. G. Duffield, T. H. 

 Burnham, and A. A. Davis, 121 



Polynesian Origins, A New Theory of, Prof. R. B.. Dixon, 



763 



Polysaccharides, The Hydrolysis of the, E. Hildt, 603 



Pomology : Scientific and Systematic, 629 ; The Journal of, 

 Nos. I and 2, 629 



Population and Parenthood, Problems of (Being the Second 

 Report of, and the Chief Evidence taken by, the 

 National Birth-rate Commission, 1918-20), 543 



Porcelain, etc.. Measurements of the Expansion of Samples 

 of, W. H. Souder and P. Hidnert, 181 



Port Erin Biological Station, The, 179 



Porto Rico : Scientific Survey of, and the Virgin Islands, 

 N. 'L. Britton and C. P. Berkey, 147; The Earthquake 

 at, on October 11, 1918, Prof. H. F. Reid and S. 

 Taber. 276 ; The Geological History of, E. T. Hodge, 

 593 ; The Shells of. Miss C. J. Mawry, 593 



Potassium, Influence of, on the Physiological Characters 

 of Sterigmatocystis nigra, M. Moilliard, 347 



Powders, The Properties of. Dr. T. M. Lowry and F. C. 

 Hemmings, 217 



Power : Knowledge and, 93 ; L. Bairstow, 135 ; F.O.I., 

 Dr. J. W. Evans, 165 



Precipitation in Jaoan, Effect of Topography on, Prof. 

 Terada, 599 



Pre-Glacial Floras, Two, from Castle Eden (Co. Durham), 

 Mrs. Eleanor M. Reid, 249 



Prehistoric : Man and Racial Characters, 153 ; Relation- 

 ship of the Various Periods of, to the Great Ice Age, 

 Prof. J. E. Marr, 153 ; Villages, Castles, and Towers 

 of South-Western Colorado, J. W. Fewkes, 367 



Pre-PalaeoHthic Man, J. Reid Moir, 289 



Pressure on the Electrical Resistance and Thermo-electric 

 Properties of Metals, Effects of. Dr. P. W. Bridgman, 

 529 



Priaptdus humanus taken by the Canadian Arctic Expedi- 

 tion, 1913-18, R. V. Chamberlin, 786 



Primitive Functions, L. Tonelli, 251 



Primula officinalis, etc., in the West of France, The Com- 

 parative Geographical Distribution of, Ad. Davy de 

 Virville, 411 



Privy Council, Sir T. Clifford Allbutt to be Sworn a Mem- 

 ber of the, 590 



Producer-Gas Plant for Power and Heating, Operating a 

 By-product, W. H. Patchell, 148 



Progress ! : Sir E. Ray Lankester, 733 ; The Idea of. 

 Dean Inge, 431 ; An Inquiry into its Origin and 

 Growth, Prof. J. B. Bury, 733 



Prominences, Observations of, J. and Mrs. Evershed, 340 



Proper Motions, Search for, by the Blink Method, R. T. A. 

 Innes, 759 



Protein Requirement of Maintenance in Man, The, H. C. 

 Sherman, 668 



Proteins : The, 257 ; The Physical Chemistry of the. Prof. 

 T. B. Robertson, 257 



Protoplasm, The Components and Colloidal Behaviour of. 

 Dr. D. T. MacDougal, 795 



Psychological Tests in Industry, 673 



Psychologies, Sir Ronald Ross, 414 



Psychology : Applied, A Laboratory of, 305 ; from the 

 Standpoint of a Behaviorist, Prof. J. B. Watson, 512 ; 

 New Conceptions of, 363 ; of the Future, The 

 (" L'Avenir des Sciences Psychiques "), E. Boirac ; 

 Translated and Edited with an Introduction by W. 

 de Kerlor, 323 ; Social, An Introduction to, Dr. W. 

 McDougall, Fourteenth Edition, 291 ; The New, and 

 its Relation to Life, A. G. Tansley, 770; Vocational, 

 A 'Laboratory of, 210 



Psychotherapy, The Theoretic Basis of, 770 



Public Health and Welfare, 151 



Pulmonary Lesions determined by Blistering Compounds, 

 A. Mayer, Guisysse, Plantefol, and Faur^-Fremiet, 604 



Pygmies of Central Africa, The, H. Lang, 367 



Pygmy Races of Man, The, L. R. Sullivan, 367 



Pyruvic Acid, New Observations on the Biochemical Pro- 

 duction of, A. Fernbach and M. Schoen, 251 



Qualitative Analysis in Theory and Practice, Prof. P. W. 



Robertson and D. H. Burleigh, 705 

 Queensland Ironbark, A New Species of, R. H. Cambage, 



732 

 Quintic Transformations and Singular Invariants, W. E. H. 

 Berwick, 474 



Rabbit, The, deprived of its Caecal Appendix, regenerates 

 this Organ by differentiation of the Extremity of the 

 Caecum, P. Portier, 347 



Radio : Call Signal, A New, Major Shaughnessy, 690 ; 

 -Diagnosis of Pleuro-Pulmonary Affections, E. Barjon, 

 Translated by Dr. J. A. Honeij, 4; Research Board, 

 O. F. Brown appointed Technical Officer to the, 463 ; 

 Sub-Committees to assist the, 754 



Radium : Facts, 435 ; for Curative Purposes, Reduction in 

 the number of White Corpuscles in those handling, 

 Mottram and Clarke, 400 ; Le, I interpretation et 

 Enseignement de la Radioactivity, Prof. F. Soddy, 

 Traduit de 1 'Anglais par A. Lepape, 805 



Railways, Electrification of, Appointment of a Committee 

 on the, 113 



Rainbow Inside Out, A, C. O. Bartrum, 388 



Rainfall and Land Drainage, Dr. Brysson Cunningham, 

 42 



Ramsay Memorial Fellowships, Forthcoming Award of, 249 



Rats : Destruction of, by Chloropicrin, G. Bertrand and 

 M. Brocq-Rousseu, 27; Repressive Measures against, 

 M. A. C. Hinton, 756 



Rayleigh, The Late Lord, The Memorial to, 687 



Rays, Tracing, through an Optical System, T. Smith, 473 



Reactions started by a Primer, Some, E. Berger, 603 



Reading, The Proposed University of, 88 



Real Variables, The Commutativity of One-parameter 

 Transformations in, A. C. Lunn, 667 



