xlviii 
Nature, 
Title Index Ewacon II, 1923 

Oxygen in Artificial Respiration, A Mask designed for 
administering, R. Legendre and M. Nicloux, 275 
Oysters and other Lamellibranchs, The Cause of Chamber- 
ing in, Edith Worsnop and Dr. J. H. Orton, 14 
Paints, Industrial, and the Health of the Worker, 685 
Paleobotany and the Gondwana Continent, 235 
Paleontographical Society, election of officers and council 
of the, 509 
Paleontology and Archaic Fishes, Prof. J. Graham Kerr, 
II 
Palestine, The Handbook of. Edited by H. C. Luke and 
E. Keith-Roach, 460 
Palolo Worm, The, Dr. G. Corney, 198 
Pamir Earthquake of February 18, 1911, The, L. Hawkes, 
682 
Pan-Pacific Science Congress in Australia, forthcoming, 
08 
Pee. Native Administration in, J. E. P. Murray, 726 
Paraceratherium bugtiense, Skull and Dentition of, C. F. 
Cooper, 653 
Paradromic Rings, Dr. G. T. Bennett, 882 
Parallaxes, Photographic Determination of, with the 1oo- 
inch Reflector (Mount Wilson), A. van Maanen, 555 
Paraquinone, The Ultra-violet Absorption Spectrum of, 
F. W. Klingstedt, 867 : 
Parasitic Protozoa in Animals and Plants, Dr. C. M. 
Wenyon, 866 
Paré, Ambroise, Life and Times of (1510-1590): with a 
New Translation of his Policy and an Account of his 
Journeys in Divers Places, Dr. F. R. Packard, 281 
Paris: Academy of Sciences, Bonaparte and Loutreuil 
Funds, 167; prize awards for 1922, 65; University, 
gifts to, by Madame E. Nathan, 34 
Parsonite, A New Radioactive Mineral, A. Schoep, 207 
Pascal, Blaise, The Tricentenary of the Birth of, 407; Prof. 
H. Wildon Carr, 814. 
Pasteur: Centenary: celebrated by the Royal Irish 
Academy, 371; celebrations: at Lahore, 24; at 
Paris and Strasbourg, 679; at Paris, 749; Lecture, 
Prof. J. Loeb, 197; The Work and Ideals of, Dr. P. 
Vallery-Radot, 204 ; Institute, The, 693 
Pasteurisation of Milk for Cheddar Cheese-making, The 
Bacteriological Aspect of, J. K. Murray, 311 
Pea, Sweet, Linkage in, Prof. R. C. Punnett, 683 
Peary Land, Dr. L. Koch, 512 
Peat in the United States, E. K. Soper and C. C. Osborn, 
82 
Pelagic Deposits, Sizes of Particles in certain, Miss A. V. 
Douglas, 794 
Pencil Pigments in Writing, C. Ainsworth Mitchell, 61 
Penrose’s Annual: The Process Year Book. Edited by 
W. Gamble. Vol. 25, 11 
Pentacrinide, Recent, A. H. Clark, 340 
Periodical Literature, An Index to, 214 
Periodicals, The Subject Index to, K: Science and Tech- 
nology; 1920, A: Theology and Philosophy (in- 
cluding Folk-lore), 214 
Peromyseus, Studies of Sub-specific Hybrids in, F. B. 
Sumner, 555 
Perry Auto-time Morse System: an Aid to the Rapid 
Acquirement of Speed in the Transmission and Re- 
ception of the Morse Code, F. W. Perry, 628 
Perseid Meteors in July 1592, W. F. Denning, 848 
Perthshire Naturalist, A: Charles Macintosh of Inver, 
H. Coates. With a chapter on Scottish Folk-music 
by H. Wiseman, 800 
Peru, North-west Part of, Geology of the Tertiary and 
Quaternary Periods in the, Dr. T. O. Bosworth and 
others, 527 
Peruvian Desert, A, Dr. J. W. Evans, 527 
Pests of the Garden and Orchard, R. Palmer and W. P. 
Westall, 530 
Petrograd: Academy of Science, Geological Museum of 
the, Opening of New Premises of the, 891 ; Principal 
Botanical Garden at, Dr. J. Palibin appointed assist- 
ant to the museum director in the, 644 
Petroleum : A Trial Boring for, at Crouelle, near Clermont- 
Ferrand (Puy-de-Dome), 520; Egyptian, W. A. 
Guthrie, 894; Origins of, Jun-ichi-Takahashi, 374 



Petrology of the Arnage District in Aberdeenshire, The, 
H. H. Read, 485 ' 
Petty, Sir William, The Tercentenary of, 676 ; 
Pflanzenanatomie, Handbuch der, 1 Abtg., 1 Teil: 
Cytologie. Band 1: Zelle und Cytoplasma, H. 
Lundegardh, 72; 2 Abtg., 1 Teil” Band 6, von Prof. 
R. Lieske, 355 
Phantasms of the Living, Dr. T. W. Mitchell, 211 
Phase Rule, The, and its Applications, Prof. A. Findlay. 
Fifth edition, 631 
Phenological Observations on Plants, Dr, E. Vanderlinden, 
129 
Phenology, Nature Study and, J. E. Clark and I. D. 
Margary, 49 
Philippine Earthquakes, 61 
Philippines, Weather in the, Rev. J. Algué, 129 
Philosophy for Men of Science, 872 
Phosphates as Fertilisers, Discovery of the Use of, Sir John 
Russell and A. Henderson Smith, 116 
Phosphatic Manures, Researches on the Assimilability of, 
A. Demolon and P. Boischot, 488 
Phosphorescence caused by Active Nitrogen, Prof. E. P. 
Lewis, 599; W. Jevons, 705 
Photo-elastic Research, Prof. E. G. Coker, 341 
Photographic: Plate, Development Centres in the, W. 
Clark, 684; Plates containing Mercury Salts, The 
Sensibility of, G. Athanasiu, 795; Sensitisers and 
Desensitisers, Prof. R. Namias, 29; Theory, Recent 
Advances in, Dr. C. E. K. Mees, 399 
Photometric Terms and Units, Adoption of the Pro- 
visional Definitions of, 857 
Photometry, E. C. Crittenden, 512 
Photo-micrographs, An Improved Apparatus for the Pro- 
duction of, M. T. Denne, 486 
Photosynthesis of Plant Products, The, Prof. I. M. Heil- 
bron, 502 ; 
Physical: Apparatus, Exhibition of, 63 ; Chemical and, 
Tables, 493; Literature on the Continent, Dr. R. W. 
Lawson, 635 ; 
Physico-chemical Themes, Some, Prof. A. W. Stewart, 
733 
Physics : Allurements in, Prof. G. W. Stewart, 482; and 
Psychics, Surg. Rear-Admiral C. M. Beadnell, 139 ; 
Applications of, to the Ceramic Industries, Dr. J. W. 
Mellor, 757; Applied, A Dictionary of. Edited by 
Sir Richard Glazebrook. In 5 Volumes, Vol. 3, 558; 
in Industry at the Wembley Laboratories, 344; 
Molecular, Dr. J. A. Crowther. Third edition, 279 ; 
Radiography and, Dr. G. W. C. Kaye, 364; The 
Institute of, associate membership of, 544 
Physioklimatologie der Festlander, Grundziige einer, Dr. 
W. R. Eckardt, 392 
Physiological Congress, International, to be held in Edin- 
burgh, 613 : 
Physiology in Medicine, Prof. E. H. Starling, 314 
Physique: mathématique, Cours de, de la Faculté des 
Sciences, Prof. J. Boussinesq. _Compléments au tome 
3, 356; Société Francaise de, Fiftieth Anniversary of 
the, 856 
Phytophthora, Oospore Formation in, S. F. Ashby, 61 
Phytophthoras, Studies on, Miss de Bruyn; Miss M, P. 
L6hnis, 305 
Picryl Sulphide, Researches on, A. Roche and V. Thomas, 
451 
Pidgeon, Daniel, Fund, The proceeds of the, awarded to 
H. Williams, 477 
Pigmentary Effector System, The, III., Dr. L. T. Hogben 
and F. R. Winton, 450 
Pilou Feast in New Caledonia, The, M- Leenhardt, 61 
Pinacolic and Semi-pinacolic Transpositions, Tiffeneau and 
Mile. J. Lévy, 275 
Pinacones, Preparation of Various, by the Action of 
Alkyl Magnesium Compounds on some a-Hydroxy- 
Methyl Ketones, R. Locquin and S. Wouseng, 452 
Pitch, the Properties of, used in Working Optical Glass, 
F. W. Preston, 346 
Plaice Fishing Ground, Impoverishment of a, Dr. C. G. J. 
Peterson, 414 ’ 
Planck Constant 4, The Value of the, R. T. Birge, 811 
Planet, Lost, Recovered, 159 
Planetary Radiation, W. W. Coblentz, 510 
