Nature, "I 



Septtinber 26, 191 S J 



Index 



Philippine Islands, Peru and the, Mineral Production of 

 95 



Philosophy : and Science, Fundamental Problems of 394 • 

 Constructive, Elements of, Dr. J. S. Mackenzie' loi ' 



Phosphate Deposits of Saldanha Bav, Dr. A. L. Du' Toit 

 175 



Phosphoric Acid, Precipitation of, as Ammonium Phospho- 

 molybdate, J. Clarens, 59 



Photographic : Determinations of Stellar Parallax, Dr. 

 A. C. D. Crommelin, 88; Industry of Great Britain, 

 The, J918, 243 



Photography : Practical and Theoretical, 341 ; ^he Science 

 and Practice of, Dr. J. R. Roebuck, 341 



Photometer for Measuring the Densities of Photographic 

 Negatives, Benson, Ferguson, and Renwick, 231 



Photo-synthetic Action Induced in Living Cells, Illustrations 

 of, Col. H. E. Rawson, 78 



Physical Welfare and Public Libraries, 177 



Physics : A Manual of, Theoretical and Practical, for 

 Medical Students, H. C. H. Candy. Second edition, 

 142 ; Everyday, J. C. Packard, 223 ; for the' Use of 

 Students of Science and Engineering, A Text-book of, 

 J. Duncan and S. G. Starling, 142 ; of the Air, Prof! 

 W. J. Humphries, 231 ; Text -books, 142 



Pilots for the Air Force, Scientific Tests for the Selection 

 of. Major M. Flack, 225 



Planarians, Means of Locomotion in, C. E. Stringer, 19 



■Planetary Perturbations and vEther-drift, 72 



Planets : Minor, 174, 232 ; The Minor, Prof. Hirayama, 53 



Plant : Breeding, Scientific, 405 ; Gec^raphy of South 

 Africa, I. B. Pole Evans, 509 ; Growth, The Stimu- 

 lation of, by Electric Fields, V. H. B. and G. W. O. H., 

 64; J. L-i 4; Materials of Decorative Gardening: 

 The Woody Plants, Prof. W. Trelease, 43 ; Names, On 

 Some Ancient, iii.. Sir W. T. Thiselton-Dyer, 186; 

 Nucleic Acids, Preparation of, G. Clarke and S. B. 

 Schryver, 93 ; Sterols, The, Mrs. M. T. Ellis, 491 ; 

 Succession in the Thorn Veld, Prof. J. W. Bews, 412 



Plantes, L'Evolution des. Prof. N. Bernard, 443 



Plants, The Geographical Distribution of. Sir D. Morris, 

 314, 



Platinurh : Dr. G. F. Kunz, 428 ; in the Ober Rosbach 

 District, 149 ; Substitutes for, 471 



Pleiades, Distance of the, Prof. W. H. Pickering, 252 



Plymouth, Marine Biology at, 455 



Pneumococcal Infections, Prophylactic Inoculation against, 

 F, S. Lister, 91 



Point-potential, An Expansion of the, A. W. Conway, 78 



Polarimetry, The U.S. Bureau of Standards Publication 

 on, 313 



Polynesia, Nuclear, Club Types of, W. Churchill, 311 



Polytechnic School of Engineering, Hon. .Sir C. A. Parsons 

 to be the President of the, 338 



Pope Innocent VIII. and Witchcraft, Rev. A. L. Cortie ; 

 Dr. E. Withington, 164 



Population and Birth-control, Dr. C. K. Millard, 227 



Porcelain, The Electrical Resistance of, at Different Tem- 

 peratures. R. G. Allen, 198 



Porto Rico, Fishes New to the Fauna of, C. F. Silvester, 



434 

 Ports. Deep, on French Ocean and Channel Coasts, J. 



Renaud, 479 

 Portugal, The Mineral Production of, 212 

 Post-Graduate Work and Research. The Promotion of, 184 ; 



Prof. M. J. M. Hill; W. A. T., 243 

 Potash : Felspar, British Supplies of. Prof. Boswell, 312 ; 



The Recoverv of, from Blast-furnace Gases, Prof. R. A. 



Berry and D. W. Mc.Arthur, 147 

 Potato, .Survival of the Blackleg Organism of tlie, in the 



Soil during Winter. J. Rosenbaum, 490 

 Potential Differences Induced by the Earth's Magnetic 



Field in an Insulated Moving W^ire, Methods of Observ- 

 ing, C. and M. Barus, 480 

 Pottery, Prehistoric, Magnetic State of Some, P.* L. Mer- 



canton, 220 

 " Poverty Bottom " Farm, Results of Working, Prof. 



W. Somerville, 71 

 Power, The Science of, B. Kidd, 181 



"Praying Palm Tree" of Faridpur, The, Sir J. C. Boso, 70 

 Prehistoric Pottery, Magnetic State of Some, P. L. Mer- 



canton, 340 



Pressure, The Meteorological Unit of, Prof. C. F. Marvin,' 



Prof. R. A. Sampson, 353 

 Projectiles : Lateral Deviation of, Caused by Spin, K. H. 



Guldner, 251 ; Localisation ct Extraction des, L. 



Ombr^danne and R. Ledoux-Leband, 38a 

 Proteus vulgaris. Biochemical Researches on, F. G. V. 



Miranda, 19 

 Pruning : Practical Aspects of, loi ; The Principles and 



Practice of, M. G. Kains, loi 

 Psammophila hirsuta Captures and Carries its Prey, The 



Manner in which, A. L^caillon, 140 

 Psychology : Dynamic, 503 ; Experimental, Present-day 



Applications of, Lt.-Col. C. S. Myers, 151 ; in relation 



to the War, Major R. M. Yerkes, 210 

 Public Morals, National Council of, .Annual Report of the, 



209 

 Puddling Process, Attempted Improvements in the, Dr. 



Desch, 374 

 Pulfrich Refractometer, The, J. Guild, 219 

 Pulmonary Sporotrichosis, A Case of, A. Sartory, G. 



Blaque, and M. Schulmann, 520 

 Pulpstones, Testing Canadian Sandstones for Use as, L. H. 



Cole, 175 

 Pyrenean Region, Utilisation of the, 392 

 Pyxidicula invisitata and Hedriocystis spinifera, J. M. 



Brown, 197 



Quadratic Relations between the Determinants of a 4-bv-8 



Array, The, Sir T. Muir, 320 

 Quadrature of the Circle, Approximate, Construction for 



an, de PuUigny ; W. W. Rouse Ball, 234 

 Quadrupedal Tracks from Carboniferous Strata in the 



Grand Canon of the Colorado River, R. S. Lull, 432 

 Queensland, The Mesozoic Floras of, .A. B. Walkom, 250 



Race, Character, and Nationality, Prof. G. Elliot Smith, 



99 



Radial Velocities by Objective Prism, Prof. R. W. Wood, 

 192 ; T. S. H. Graham, 193 



Radiation and the Electron, Prof. R. A. Millikan, 234, 254 



Radio-active : Element, A New, from the Residue of Pitch- 

 blende, 393 ; Substances, Trading in. Prohibited, 468 



Radio-activity : and the Coloration of Minerals, Dr. H. 

 Newberv and H. Lupton, 198; of Some Canadian 

 Mineral" Springs, The, Dr. J. Satterley and R. T. 

 El worthy, 6 



Radiodiagnostic Technique et Clinique, Precis de. Dr. 

 Jaugeas. Second edition, 382 



Radiography : French Works on, 382 ; and Radio-thera- 

 peutics, Dr. R. Kno"x. Part i.. Radiography. Second 

 edition, 22 ; Part ii.. Radio-therapeutics. Second edi- 

 tion, 283 ; The Practical Uses of, Dr. R. Knox, 512 



Radio-therapic Unit of Quantity, A, H. Bordier, 498 



Radio-therapy, 283 



Radium Therapy, ' Dosage in, J. C. Mottram and Dr. S. 

 Russ, 151 



Rainfall Distribution over France, A. .Angot, 95 



Rain-water, Chemical Experiments with, 511 



Ramsay, Sir William, Sir W'. A. Tilden. 361 ; Sir T. E. 

 Thorpe, 361: Memorial Fund, The, 31 



Rate-setting on Machine Tools, D. V. Merrick, 433 



Rats and Evolution, A. C. and A. L. Hagedoorn, 376 



Ray Society, Election of Officers of the, 69 



Reale Acca'demia dei Lincei, Prof. J. N. Langley, Sir F. W. 

 Dyson, Prof. H. Lamb, and Sir E. Rutherford elected 

 Foreign Members of the, 371 



Reconstruction in France, 254 



Reflex Nervous Discharge. Brevity, Frequence of Rhythm, 

 and .Amount of, as Indicated by Reflex Contraction, 

 N. B. Dreyer and Prof. C. S. Sherrington, 318 



Refractometers : Critical-angle, of the Pulfrich Type, J. 

 Guild : F. Simoon. ",-,2 ; Critical-angle, The .Accuracy 

 attainabi< 



Refractory M. ' ^ --■ ^ R- 



Searle, 2 1 



Refrigeration : and Cold St.iragr, Srinititic Problems of, 

 154 ; and Related Subjects, A. G. G. Leonard, 162 



Reinforced ■ Concrete v. Salt, Brine, and Sea-water. Prof. 

 H I ^1 CifiLihton. Kio; Motnl-. C. W. Di-nnv, 134 



Rrl, !■..-., < .ir.'l.ilioil nt.'K. A. Fl-hi'l. 470 



