Nature 

 Set>tcinber 29 



'. 19J1J 



Index 



xlv 



a Loan to. the Dyson Perrins Laboratory, 540; The 

 Honorary Degree of D.Sc. conferred on Prof. C. S. 

 Sherrington, 572 ; VV. C. Burnett appointed Secretary 

 of the Delegacy of Local Examinations ; P. H. Martin 

 elected to the Theodore Williams Scholarship in 

 Anatomy, 604 ; Prof. D. H. Macgregor appointed 

 Drummond Professor of Political Economy, and Prof. 

 E. S. Goodrich Linacre Professor of Zoology and Com- 

 parative Anatomy, 766 

 Oxides, Allotropic Varieties of, Mile. S. Veil, 575 

 Oxygen Gas, A New Revision of the Density of, E. Moles 



and F. Gonsalez, 831 

 Oyster, The Native (O. edulis), Sex-change in. Dr. J. H. 

 Or ton. 586 



Pain, The Physiology of, 343 



Palaeontographical Society, Election of Officers and 



Council of the, 563 

 Palaeontology, Human, Prof. A. Keith, 322 

 Palestine : Boring in, for Water, Capt. P. H. Mangin, 599 ; 



Science and Technology in, Daisy L. Adler, 458 

 Palmitic Acid on Water, The Properties and Molecular 



Structure of Thin Films of, N. K. Adam. Part i., 286 

 Pamir : Studies in the Vegetation of, O. Paulsen, 270 ; 



The High, 270 

 Panama, Gift by the Government of Panama for the 



proposed Memorial to the late Surg. -Gen. Gorgas in, 



277 

 Pancreatic Amylase, Influence of some Organic Bases and 



of their Chlorohydrates on the Activity of, A. Desgrez 



and R. Moog, 127 

 Paper in Indian Libraries, The Perishing of, J. J. Sud- 



borough and Miss M. M. Mehta, 437 

 Papua, Commerce and Customs of, Hon. J. H. P. Murray 



and others, S. H. Ray, 26 

 Paraffins, The Catalytic Decomposition of the Polyhalogen 



Derivatives of the, A. Mailhe, 639 

 Parallax Observations, Mr. Flint's, 759 

 Paris : Academy of Sciences, Gift to, by Baron Edmond 



de Rothschild, for the Development of Physico-chemical 



Research in France, 563 ; Conference of the Museums 



Association, The, 688 ; University of, Attendance at 



the, 156 ; Gift to, by E. Deutsch de la Meurthe, 572 

 Parenthood : Four Aspects of, 5 ; The Control of, Prof. 



J. A. Thomson and others. Edited by Dr. J. Marchant, 



5 ; Dr. Marie Stopes, 88 

 Patagonia, Souther-n, Glacial Geology of, E. G. Fenton, 



828 

 Pathogenic Micro-organisms, Embryonic Leaflets in rela- 

 tion to, C. Levaditi, 831 ; Organisms in the Pollen of 



Flowers and Disease in Bees, Hon. Col. C. J. Bond, 



584 

 Pearl, The Japanese Artificially Induced, Dr. H. Lyster 



Jameson, 396, 621 ; Dr. W. Wingrave, 620 

 Pearls, "Cultured," 341 

 Peat : in Ireland, The Winning, Preparation, and Use of, 



728 ; Irish, The Exploitation of. Prof. H. Ryan, 728 ; 



Dr. A. Fleck, 779 

 Peltier Effect, The, and Low-temperature Research, Dr. 



G. Martin, A. A. Campbell Swinton, 43 ; Sir Oliver 



Lodge, 73 ; Dr. G. Martin, 141 

 Pendulum Operations in India and Burma, Capt. Couch- 

 man, 187 

 Pennsylvania: Botanical Papers from, 764; University 



Museum, Ancient American Gold Objects in the. Dr. 



W. C. Farabee, 85 

 Penny, The High-value, 565 

 Pens6e scientifique," " Maitres de la, 758 

 Perinereis cuUrijera. and P. Marioni, Origin and the R6le 



of the Reserve Cells of the General Cavity in, etc., 



R. Herpin, 768 

 Persia, A History of, Brig.-Gen. Sir Percy Sykes. (In 



two volumes.) Second edition, 804 

 Personality, the Conception of. The Moral and Social 



Significance of, the late A. G. Heath, 777 

 Peru, The Sea<oast and Islands of, R. C. Murphy and Dr. 



F. A. Lucas, 501 

 Petroleum ; in the Punjab and North-west Frontier Pro- 

 vince, E. H. Pascoe, 792 ; Origin of, and Cause of Gas 



Pressure, 347.; Technologists, Institution of, Election of 

 Officers and Council of the, 149 



Phenol into cydo-Hexanol, The Transformation of, G. 

 Vavon and J. Detrie, 478 



Phenylhydrazones, The Catalytic Hydrogenation of the, A. 

 Mailhe, 414 



Philippines, The Climate and Weather of the, 1903 to 19 18, 

 Rev. J. Coronas, 732 



Phosphate in Canada, H. S. Spence, 794 



Photographic : Abstracts, 280; A6rienne, Applications de la, 

 L.-P. Clerc, 167 ; Apparatus, Historical Collection of, 

 Presentation to the Royal Photographic Society of a. 

 Miss M. Talbot, 660 ; Films, The Structure and Proper- 

 ties of, Dr. C. E. K. Mees, 502 ; Reducers, the Action 

 of, on the Images Produced on Development Printing 

 Papers, L. A. Jones and C. E. Fawkes, 344 



Photomicrographic Apparatus, A Universal Geometric Slide, 

 J. E. Barnard, 470 



Phototropism in Solution, Studies on. Part i., Prof. B. K. 

 Singh, 373 



Phrenology and Habitat, with special reference to Wood- 

 lands, Dr. E. J. Salisbury, 414 ; of the British Isles, 

 Dec, 1919, to Nov., 1920, Report on the, J. E. Clark 

 and H. B. Adames, 413 



Physical : and Chemical Constants, Tables of, and Some 

 Mathematical Functions, Dr. G. W. C. Kaye and Prof. 

 T. H. Laby. Fourth edition, 264 ; Reactions, Active 

 Molecules in, E. K. Rideal, 446; Science in the Great 

 War, The Applications of, A. E. Leighton, Dr. A. C. D. 

 Rivett, 442 ; and Natural Sciences, The Place of the, 

 in General Education, Prof. Whitehead, 655 



Physician's Anthology, A, of English and American Poetry, 

 selected and arranged by Drs. C. A. Wood and F. H. 

 Garrison, 102 



Physico-chemical Problems relating to the Soil, Dr. E. J. 

 Russell, and others, 504 



Physics: a Profession, 289; A Text-book of. Dr. W. 

 Watson. Seventh edition. Revised by H. Moss, 358 ; 

 Institute of, The Inauguration of the. Speeches by Sir 

 J. J. Thomson and A. J. Balfour, 312, 313; of Metals, 

 The Internal, 218; The Internal, Sir George Beilby ; 

 The Writer of the Article, 265 ; of the Air, Prof. W. J. 

 Humphreys, 66; The Concept of " Space " in, Dr. H. 

 Jeffreys, 267 ; The Elements, Dr. N. R. Campbell, 643 ; 

 The Foundations of. Dr. E. N. da C. Andrade, 643 



Physiology : Essentials of. Profs. F. A. Bainbridge and 

 J. A. Menzies. Fourth edition, 166 ; for Students, 166 



Physis. Part 12, vol. ii., 53 



Phytophthora, Sexual Organs of. Prof. G. H. Pethybridge, 

 204 



Phytoplankton of the Inland Lakes of Wisconsin, part i., 

 G. M. Smith, 168 



Picard Oxy-acetylene Torch, Improvement of the, 632 



Picture-hanging : Principles of. Sir G. Greenhill, 491 ; Wire, 

 R. B. Marston, 362 ; A. J. Stubbs, 395, 438 ; N. M. 

 Richardson, 601 



Piezo-chemistry, Sir T. E. Thorpe, 450 



Piezochemie kondensierter Systeme, Prof. E. Cohen and 

 Dr. W. Schut, 450 



Pilobolus, The Ocellus Function of the Subsporangial 

 Swelling of. Prof. A. H. R. Buller, 574 



Pilot-balloon Trajectory, An Unusual, G. A. Clarke, 30 



" Pilz- und Krauterzentrale," Heilbronn a. N., The 

 Objects of the, 371 



" Pinaflavol," a New Photographic Sensitiser, Dr. Konig, 



Pine, Maritime, The Acid Constituents of the Secretion 



of the, G. Dupont, 542 

 Place-names of Northumberland and Durham, The, Prof. 



A. Mawer, 776 

 Plaice : Fishery in the Belt Sea and Neighbouring Waters, 



407 ; in Relation to the Intensive Fishing of the 



Present Times in the Belt Sea and other Waters, On 



the Stock of. Dr. C. G. J. Petersen, 407 

 Plague : and Rats, Lt.-Col. W. G. Liston, 606 ; Infection, 



Eradication of, by Rat Destruction, Major J. C. G. 



Kunhardt and Asst.-Surg. G. D. Chitre, 757 

 Planarian, A New British Land, Dr. R. F. Scharfif, 361 

 Planetary Photography, E. C. Slipher, 725 

 Plant : Biology, 37 ; A Text-book of. Prof. W. N. Jones 



