NaUtre, "l 



November 25, 1909J 



Index 



XXXI 



Parkinson (J.), Folk-tales Current among Yoruba-speaking 



Peoples, 18 

 Parsons (Hon. C. A., F.R.S.), Model of Leakage Path 



Device for Regulating Voltage of Alternators, 20 

 Parsons (James), Death and Obituary Notice of, 78 

 Parsons (Hon. R. C), " Panflex " Spring Wheel for Motor 



Vehicles, 21 

 Parthenogenesis : die chemische Entwicklungserregung des 



tierischen Eies (Kiinstliche Parthenogenese), Jacques 



Loeb, 459 

 Parville (Henri de), Death of, 105 



Pascal (P.), Magnetic R6le of Oxygen in Organic Com- 

 pounds, 390 

 Pathology ; a Text-book of General Pathology for the Use 



of Students and Practitioners, Prof. J. M. Beattie and 



\V. E. Carnegie Dickson, 36 ; Death and Obituary Notice 



of Dr. Otto von Bollinger, 263 

 Patrick (W. A.), Electrical Conductivity of Solutions of 



Iodine and Platinum Tetraiodide in Ethyl Alcohol, 



474 



Patten (Prof. C. J.), on the Germinal Disc in Naturally 

 Incubated Eggs of Passer domesticus, 505 



Pearl (Raymond), Inheritance of Fecundity in Poultry, 79 ; 

 Physiology of Reproduction in the Domestic Fowl, 107 



Pearl (Mr.), " Selection Index Numbers " for Breeding, 

 igb 



Pearson (Prof. H. H. W.), Percy Sladen Memorial Expedi- 

 tion in South-west Africa, 1908-9, 466, 499 



Pearson (Prof. Karl, F.R.S.), a First Study of the In- 

 heritance of Vision and of the Relative Influence of 

 Heredity and Environment on Sight, 49 ; the Problem 

 of Practical Eugenics, 374 



Peat : the Peat Deposits of Maine, E. S. Bastian and C. A. 

 Davis, 490 ; Investigation of the Peat Bogs and Peat 

 Industry of Canada during the Season 1908-9, Messrs. 

 Nystrom and Anrep, 490 



Feet (Mr.), Prehistoric Antiquities of Malta, 478 



Peklo (Dr. J.), the Epiphytic Mycorrhiza that Invests the 

 Roots of Monotropa Hypopitys, 373 



Peniston (Miss A.), Nucleus of the Yeast Plant, 537 



Percentages, a Question of, J. T. Cunningham, 159; Lewis 

 VVhalley, 220 ; Prof. R. Abegg, 220 ; Spencer Pickering, 

 F.R.S., 275 



Percentages in School Marks, J. D. Hamilton Dickson, 

 367 



Perrier (Dr. Edmond), Inauguration of the Statue of Jean 

 de Lamarck, 106 



Perrin (Jean), the Brownian Movement and Molecular 

 Constants, 360; the Brownian Movement of Rotation, 

 45? 



Perrine, Search-ephemerides for Comet i8q6 VIL, F. W. 

 Ristenpart, 170 ; R. Castro and A. Repenning, 170 ; 

 Re-discovery of Perrine's Comet, Herr Kopff, 229 ; Herr 

 Ristenpart, 229; Perrine 1896 VII., Comet iqoqft, 298; 

 Observations of, 315; Dr. Max Wolf, 376; Dr. Ebell, 

 376 



Perry (Prof. E. Guthrie), Copper Implements from a Site 

 in Western Ontario, 47S 



Perry (Prof.), Variation of the Specific Heat of Mercury 

 at High Temperatures, 472 



Perseid .Shower, the Recent, J. H. Elgie, 267; J. C. Jeffer- 

 son, 267 ; E. Hawks, 267 



Perseids of 1909, the, W. F. Denning, 189 



Pestana (Nerdu Rangel), Extinction of Yellow Fever in 

 Rio de Janeiro, 136 



Peter (Dr. Bruno), die Planeten, 36 



Peter (Prof. Karl). Untersuchungen iiber Bau und 

 Entwickelung der Niere, 94 



Peters (W. J.), First Magnetic Results obtained on the 

 Carnegie in the North Atlantic, 529 



Petersen (C. G. Joh.), on the Larval and Post-Iarval Stages 

 of some Pleuronectida; (Zeugopteris, Arnoglossus, Solea), 

 iqi 



Petrie (Prof. Flinders, F.R.S.), Ancient Modelled Heads 

 of Various Races, 2 1 ; Find of String Nets of the Seven- 

 teenth Egvptian Dynasty. 403 



Petrie (Dr. J. M.), Hexone Bases of Egg-white, 240 



Petrologv : Rocks and Rock Minerals, L. V. Pirsson, 242 ; 

 Genesis of Metallic Ores and of the Rocks which Enclose 

 Them. B. Svmons, 242 ; the Natural History of Igneous 

 Rocks, A. Harker, F.R.S., 331 



Pettersson (Dr. O.), Movements of the Deeper Waters of 

 the Skagerack, 197 



Pettit (A.), Virulence of the Trypanosomes of Mammals 

 Modified after Passage through Cold-blooded Vertebrates, 

 210; Trypanolytic Power of the Blood of some Cold- 

 blooded V'ertebrates with Respect to Trypanosoma 

 evansi, 390 



Pfaundler (L.), Weltsprache und Wissenschaft, 218 



Pflanzenbiologie, Dr. W. Migula, 451 



Pfianzenwelt Deutschlands, die. Dr. P. Graebner, 451 



Phanerogamen, Prof. E. Gilg and Dr. R. Muschler. 451 



Pharmacognosy : Grundriss der Pharmakochemie, Dr. 

 O. A. Oesterle, Prof. Henry G. Greenish, 184; Southall's 

 Organic Materia Medica, J. Barclay, Prof. Henry G. 

 Greenish, 184 ; Lehrbuch der Pharmakognosie, Dr. 

 George Karsten and Dr. Friedrich Oltmanns, Prof. 

 Henry G. Greenish, 454 



Pharmacology ; Inaccurate Method of Stating Dosage, 

 Prof. Benjamin Moore, 196 



Philippi (E.), tjber das Problem der Schichtung und uber 

 Schichtbildung am Boden der heutigen Meere, 266 



Phillips (C. E. S.), Permanently Luminous Watch Dial and 

 Military Night Compass, 20 



Phillips (Dr. P.), on the Re-combination of Ions in Air at 

 Different Temperatures, 472 



Philology : Weltsprache und Wissenschaft, L. Couturat, 

 O. Jespersen, R. Lorenz, W. Ostwald, L. Pflaundler, 218 



Philosophy : -tudes sur Leonard de Vinci, ceux qu'il a lus 

 et ceux qui I'ont lu, Pierre Duhem, 2 ; Materialistische 

 Epoche und monistische Bewegung, Paul Volkmann, 361 



Phonetics : the Science of Speech, an Elementary Manual 

 of English Phonetics for Teachers, Benjamin Dumville, 

 Prof. John G. McKendriclv. F.R.S., 124; the Analysis 

 of Sounds used in Speech, Edwin Edser, 533 



Photography : die Photographic, W. Zimmermann, 274 ; 

 Exhibition of the Photographic Salon, 351 



Physics : etudes sur Ltonard de Vinci, ceux qu'il a lus et 

 ceux qui I'ont lu, Pierre Duhem, 2 ; Decay of Surface 

 Waves Produced by a Superposed Layer of Viscous 

 Fluid, W. J. Harrison, 27; Passage of Electricity through 

 Gaseous Mixtures, E. M. Wellisch, 27 ; the Coeflicients 

 of Capacity and the Mutual Attractions or Repulsions of 

 Two Electrified Spherical Conductors when Close To- 

 gether, Dr. A. Russell, 27 ; Group-velocity and the 

 Propagation of Waves in a Dispersive Medium, G. 

 Green, 29 ; Heat of Polonium, William Duane, 29 ; 

 Hermann and Robert Grassmann's Electronic Theory, 

 Dr. F. Kuntze, 4; ; Pressure Perpendicular to the Shear 

 Planes in Finite Pure Shears, and on the Lengthening 

 ot Loaded Wires when Twisted, J. H. Poynting, 56; 

 Wave Motion of a Revolving Shaft and Suggestion as 

 to the Angular Momentum in a Beam of Circularly 

 Polarised Light, J. H. Poynting, 56; Thermal Conduc- 

 tivity of Air and other Gases, G. W. Todd, 56 ; Intro- 

 duction to the Chemistry and Physics of Building Mate- 

 rials, Alan E. Munby, 62 ; the Elements of Electricity 

 and Magnetism, Prof. W. S. Franklin and Barry Mac- 

 nutt, 66 ; a Short University Course in Electricity, 

 Sound, and Light, Dr. Robert A. MiUikan and J. Mills, 

 66 ; Naturlehre fiir hohere Lehranstalten auf Schuler- 

 iibungen gegrundet. Dr. Friedrich Danneman, 66 ; the 

 Elementary Theory of Direct Current Dynamo Electric 

 Machinery, C. E. Ashford and E. W. E. Kempson, 66 ; 

 Electrical Laboratory Course for Junior Students, R. D. 

 Archibald and R. Rankin, 66; the Theory of Crookes's 

 Radiometer, Lord Rayleigh, O.M., F.R.S., 69; Con- 

 auctivity of a Gas at Atmospheric Pressure under the 

 Influence of a High Alternating Voltage, A. Chassy, 90 ; 

 Molecular Scattering and Atmospheric Absorption, Prof. 

 Arthur Schuster, F.R.S., 97; Physical Society, 119; 

 Introduzioni Teoriche ad Alcuni Esercizi Pratici di 

 Fisica, Alfonso Sella, 125 ; the /Ether of Space, Charles 

 W. Raffety, 127 ; Negative Attempt to Detect Fluores- 

 cence Absorption, Dr. R. A. Houstoun, 149 ; Existence 

 in the Magnetic Decomposition of the Absorption Bands 

 of a Uniaxial Crystal of Dissymmetry of Positions, Jean 

 Becquerel, 150 ; Researches at the National Physical 

 Laboratory, 163 ; an Elementary Treatment of the Theory 

 of Spinning Tops and Gyroscopic Motion, Harold Crab- 

 tree, Prof. C. V. Boys, F.R.S., 182 ; Magneto- und 

 Elektro-optik, Dr. Woldemar Voigt, 185 ; Cours de 



