hidex 



r Nature 



V„fy 22, I, 



Standpoints of Comparative Anatomy, Physiology, 

 Pathology, and Bacteriology, Ludwig Hopf, 424 ; the 

 Catalasc of the Blood, C. Gessard, 449 ; the Sense of 

 Proximity, Charles H. Melland, 456; Effects of Chocolate 

 and Coffee on Uric Acid and the Purins, Pierre Fauvel, 

 480; Problem of Man's Right-handedness, Prof. E. 

 Gaupp, 500; the New Institute of Physiology at Univer- 

 sity College, London, 503 ; Variations of Dehydrations 

 of the Organism with Altitude, H. Guillemard and R. 

 Moog, 510 



Pickering (Prof.), Harvard College Observatory, 321; a 

 Standard Scale of Photographic Magnitudes, 380 



Pickering (\V. H.), Annals of the Astronomical Observatory 

 of Harvard College, a Search for a Planet beyond 

 Neptune, 463 



Pictet (Am^), Complete Synthesis of Laudanosine, 210 



Pictet (.A.), Biologia Centrali-Americana, Orthoptera, 

 Vol. i., 241 



Piedallu (.-^ndr^), a Mould in Tanning with Oil, 30 



Pierce (F. M.), the Genitalia of the Noctuidas of the 

 Lepidoptera of the British Islands, 246 



Pirie (Dr. J. H. Harvie), Report on the Scientific Results 

 of the Voyage of S.Y. Scotia during the Years 1902, 1903, 

 and 1904, under the Leadership of Dr. William S. Bruce, 

 Vol. iv. , Zoology, Part i.. Zoological Log, 161 



Pisciculture: Plaice-output at Port Erin, 284; Costiasis 

 and its Treatment in Young Trout, Louis L^ger, 389 



Planets ; Diameter and Position of Mercury, Prof. Stroo- 

 bant, 200 ; Mercury as an Evening Star, 320 : Mars as 

 the Abode of Life, Percival Lowell, 212 ; the " Original " 

 Canals of the Martian Doubles, Prof. Lowell. 260; 

 Development of Martian Canals, Prof. Lowell, 288 ; Mars, 

 Prof. Lowell, 353 ; the Circularity of Planetary Orbits, 

 Prof. T. J. J. See, 229 ; les Plan^tes et leur Origines, 

 Ch. Andr^, 274: Occultation of Planets, Dr. Downing, 

 2S8; the Intra-Mercurial Planet Problem, Prof. Camp- 

 bell, 320; Dr. Perrine, 320; Jupiter, Prof. Lowell, s^^ : 

 Mr. Lampland, 353 ; a Remarkable Transit of Jupiter's 

 Third Satellite, Mr. Innes, 409 ; the Rings of Saturn, 

 Prof. Levi-Civito, 439 ; Annals of the Astronomical 

 Observatory of Harvard College, a Search for a Planet 

 beyond Neptune, W. H. Picketing, 4^3 



Plants, Life-histories of Familiar, John J. Ward, 344 



Plants and their Ways, E. Evans, 452 



Plaskett (Mr.), Camera Objectives for Spectrographs, 440 



Platen (Dr. Paul), Untersuchungen fossiler Holzer aus dem 

 westen Vereinigten Staaten von Nordamerika, 181; 



Pofil (Dr. Robert), the Defects of English Technical Educa- 

 tion and the Remedy ; Paper read at the Association of 

 Teachers in Technical Institutions in Huddersfield. 205 



Poisons of the Pharmacy Act, the, C. Simmonds. 191 



Poizat (L.), O.xidation of .'\romatic Nitro- and Nitroso- 

 derivatives by -Ammonium Persulphate, 300 



Pollination of the Primrose, the, John J. Ward, 457 ; W. E. 

 Hart, is7, 402 ; the Reviewer, 4=:- 



PoIIock (Sir Frederick), the British Science Guild, 52 



Poor Law Commission Report, the, 12 



Poor (Prof.), the Perturbations of Brooks's Comet (1889 V) 

 by Jupiter in 1886, 410; the Photoheliometer, 503 



Popularising of Scientific Knowledge, 2,7 



Porter (A. W.), Electric Splashes on Photographic Plates, 

 348 



Posejpal (V.), Electromotive Forces of Magnetisation, 149 



Potatoes, the Dry-rot of, Sibyl Longman. 148 



Potts (F. A.). Changes in the Common Shore Crab caused 

 by Sacculina, 88 



Poultry, Influence of Breed on Egg-production in, E. and 

 W. Brown, 138 



Pressland {A. ].), the Supply of Secondary Education in 

 England and Elsewhere, 473 



Pressure in the Sun's Atmosphere, MM. Fabry and 

 Buisson, 229 



Prideaux (Dr. E. B. R.), Relation between Composition and 

 Conductivity in Solutions of meta- and orf/io-Phosphoric 

 Acids, 209 



Priest (Walter B.), the Promotion of Scientific Research, 68 



Priestley and Coulomb's Law, C. J. Woodward, S 



Primros'e, the Pollination of the, John J. Ward, 4<^7 ; W. E. 

 Hart, 457. 492 : the Reviewer, 4?T 



Prior (Dr. G. T.), Identity of Guarinite and Hiortdahlite, 

 178 



Producer Gas for Engines, J. Emerson Dowson, 200, 232 

 Prominence, a Remarkable, Father Chevalier, 108 

 Proszynski (C. de), the Problem of Kinematographic Vision 



without Vibrations, 480 

 Proteins, the General Characters of the. Dr. S. B. 



Schryver, 307 

 Protistcnkunde, Problem der, i., die Trypanosomen ihre 

 Bedoulung fiir Zoologie, Medizin und Kolonialwirtschaft, 

 Prof. F. Doflein, 489 

 Protozoa : a Treatise on Zoology, Part i., Introduction and 



Protozoa, 152 

 Prout (Louis B.), Cross-breeding of Two Races of the 



Moth Acidalia virgularia, 58 

 Proximity, the Sense of, Charles H. Melland, 456 

 Przibram (Dr. Hans), Experimental Zoology, 2 

 Psychology : Psychologic als Grundwissenschaft der Pada- 

 gogik, 95 ; Mental Pathology in its Relation to Normal 

 Psychology, a Course of Lectures delivered in the 

 University of Leipzig, Dr. Gustav Storring, 216; 

 an Introduction to Social Psychology, William McDougall, 

 William Brown, 245 ; Lectures on the Elementary 

 Psychology of Feeling and Attention, Prof. E. B. 

 Titchener, William Brown, 245 ; die Hypnose und die 

 Suggestion, ihre Wesen, ihre Wirkungsweise und ihre 

 Bedeutung und Stellung unter den Heilmitteln, Dr. W. 

 Hilger, 273 ; Volkerpsychologie, eine Untersuchung der 

 Entwicklungsgesetze von Sprache, Mythus und Sitte, 

 Wilhelm Wundt, Rev. A. E. Crawley, 334 

 Purdy (C. T.), Problems Connected with the Construction 



of Ncui York Times Building, 259 

 Purvis (J. E.), Influence of Dilution on the Colour and 

 the .Absorption Spectra of ^'arious Permanganates, 420 



Qu^nisset (M.), Photographs of the Earthshine on the 

 Moon, 141 



Radiography : the y Rays of Uranium, Frederick Soddv and 

 Alexander S. Russell, 7 ; the Radio-active Deposits o.' 

 Actinium, S. Russ, 8 ; Coefficient of Diffusion of the 

 Actinium Emanation, G. Bruhat, 89 ; Radio-thorium, 

 Frederick Soddy, 12 ; the Absorption of X-rays, Dr. C. G. 

 Barkla and C. A. Sadler, 37 ; the Rays of Uranium X, 

 Frederick Soddy, 37 ; Radium Institutes, 45 ; Liquid 

 Radium Emanation, Sir William Ramsay, K.C.B., 

 F.R.S,. 347; the Interpretation of Radium, Frederick 

 Soddy, 368 ; the Radium Emanation, A. Debierne, 389 ; 

 Influence of Radium on the Velocity of Crystallisation, 

 Louis Frischauer, 3S9 ; the Condensation of the Radium 

 Emanation, A. Laborde, 509 ; Chemical .Action of the 

 Penetrating Rays of Radium on Water, Miroslaw Kern- 

 baum, 149 ; on the a Rays from Radium B, Dr. Howard 

 L. Bronson, 1^9 : Influence of Radium Ravs on Plants, 

 Prof. C. S. Gager, 198 ; E.xpulsion of Radio-active Matter 

 in the Radium Transformations, Sidney Russ and W. 

 Makower, 23S ; Passage of Rontgen Rays through Gases 

 and Vapours, J. .A. Crowther, 57 ; lonisation by Rontgen 

 Rays, Dr. Charles G. Barkla, 1S7 ; Statistical Theory 

 of the Form of the Curve of Oscillation for the Radiation 

 Emitted by a Black Body, Prof. H. .A. Wilson, 37; Mag- 

 netic Rays, 80 : Velocity of the Kathode Rays Ejected 

 by Substances Exposed to the y Rays of Radium, R. D. 

 Kleeman, 86; Effect of Radiations on the Brush Dis- 

 charge, .A. E. Garrett, 147; Leakage of Helium from 

 Radio-active Minerals, Hon. R. J. Strutt, F.R.S., 147: 

 Liberation of Helium from Radio-active Minerals by 

 Grinding, J. .A. Gray, 23S ; Magneto-kathode Rays, M. 

 Gouy, 149; Contribution to the Study of Radiation, G. 

 Millochau, 149 ; Radio-activity of the Thermal Springs of 

 Bagn^res-de-L,uchon, Charles Moureu and Adolphe Lepape, 

 180; Determination of the Constant of Stefan's Law, C. 

 F^ry, 209 ; Radiation and Temperature of the Flame of 

 a Bunsen Burner, Edmond Bauer, 209 ; Radiation of 

 Potassium Salts, E. Henriot, 209 ; Apparatus for Radio- 

 active Measurements by the Electroscope Method, C. 

 Cheneveau and A. Laborde, 228 ; Radio-activity in Rela- 

 tion to Morozoff's Theory pf the Constitution of .Atoms, 

 Prof. B.,de Szyszkowski, 276 ; Properties of Doubly-charged 

 Ions, Drs. J. Franck and W. Westphal, 2S7 : Investiga- 

 tion of the Radiation Constants of Metals, Dr. W. W. 



