Index 



V Nature, 



\_Novcinler 24, igii 



Petsch (Prof. Dr. Robert), Lessings Briefwechsel mit 

 Mendelssohn und Nicolai iiber das Trauerspiel, 294 



Pettit (A.), Forms of Endogenous Multiplication of 

 Hacmogregariiia sebai, 131 ; an Epidemic Disease in 

 Trout, 228 



Pflanzengarten, der, seine Anlage und seine Verwerkung, 

 Prof. F. Pfuhl, 326 



Pfuhl (Prof. F.), der Pflanzengarten, seine Anlage und seine 

 Verwerkung', 326 



Pharmacy: the British Pharmaceutical Conference, 156; 

 Pharmaceutical Research, F. Ranscm, 156; Standardisa- 

 tion of Disinfectants, Prof. Sims Woodhead and Dr. C. 

 Ponder, 156; Prof. R. T. Hewlett, 156; the Rideal- 

 W'alker Test, C. T. Kingzett and R. C. Woodcock, 156; 

 -Modification of Mendel^eff's Classification of the 

 Elements, J. F. Tocher, 156; Water Analysis, J. E. 

 Purvis, 156 ; International Congress of Pharmacy, 354 ; 

 .Analytical Methods, 354 : Sale of Proprietary Disin- 

 fectants, 354 ; Biochemical Method of E.xaminalion of 

 \egetable Glucosides Hydrolysed by Emulsion, Prof. 

 Bourquelot, 354 ,• Chemical Method of Obtaining the 

 True Glucoside Arbutin, Prof. Herissey, 355 ; Establish- 

 ment of the Constitution of the Aloins, Mr. Legei , 355 , 



rhilippi (E.), die Grundproben der Deutschen Siidpolar 

 E.xpedition, 1901-3, 167 



Plii-Ilips (Charles E. S.), Electrical and other Properties 

 of .Sand, Discourse at Royal Institution, 255 



Philology : the New School of Japan, Founded for the 

 Purpose of Making the Use of the Newly Invented 

 Letters, F. Victor Dickins, 7 ; Death and Obituary 

 Notice of Dr. John Peile, 467; a Correction, the Writer 

 of the Article, 496 



Philosophies, Prof. Ronald Ross, F.R.S., C.B., 493 



Philosophy : Gustav Freytags Kultur- und Geschichts- 

 psychologie, Dr. Georg Schridde, 294 ; Lessings Brief- 

 wechsel mit Mendelssohn und Nicolai iiber das 

 Trauerspiel, Prof. Dr. Robert Petsch, 294; Hegels 

 Asthetik im Verhaltnis zu Schiller, A. Lewkowitz, 294 ; 

 Uber Christian Wolff's Ontologie, Hans Pichler, 294; 

 Zwei V'ortrjige zur Naturpliilosophie, Hans Driesch, 294 ; 

 an Inconsistent Preliminary Objection against Posi- 

 tivism, Prof. Robert Ardigo, 461 



Photography : Marine Biological Photography, Francis 

 Ward, 10; Photographs of Aurora;, Carl Stormer, 86; 

 the Ultra-rapid Kinematograph, Prof. C. V. Boys, 

 F.R.S., 112; the .Accurate Measurement of Photographs, 

 Prof. E. C. Pickering, 1S4 ; the Fifth International 

 Congress of Photography, 215 ; Photo-surveying in 

 Canada, E. Deville, 215; on the Photographic Emulsion, 

 Prof. Wilder D. Bancroft, 215; Theory of Development, 

 J. Desalme, 215 ; Measuring the True Opacity or Obstruc- 

 tive Power of Photographic Plates, F. F. Renwick, 215; 

 How to take Photographs with Infra-red and Ultra-violet 

 Lights, Prof. R. W. Wood, 215; \'arious Gelatine- 

 hardening Agents, A. and L. Lumiere and A. Seyewetz, 

 216; the Telegraphy of Photographs, Wireless and by 

 Wire, T. Thorne Baker, 220 ; the Telegraphic Transmis- 

 sion of Photographs, T. Thorne Baker, 460 ; the Royal 

 Photographic Society's E.\hibition, 273 ; Photomicro- 

 graphs of Botanical Studies, 296 ; the Photographic 

 -Annual, 1910-1, 296; Chemistry for Photographers, 

 Chas. F. Townsend, 327 



'Physics : Variation of Young's Modulus under an Electric 

 Current, Dr. H. W'alker, 30; Continuous and Stable 

 Isothermal Change of State, Prof. W. Peddle, 30; Death 

 of Prof. T. H. Core, 47 ; Evaporation from a Solid 

 Sphere, H. W. Morse, 51 ; Gas-calculator Designed by 

 Dr. R. C. Farmer, 51 ; Determination of the Ratio of 

 Mass to Weight, L. Southerns, 62 ; Appearance of Certain 

 Dielectric Anomalies by Changing the State of the 

 Insulating Medium, Louis Malcl^s, 64 ; Exclusive Pres- 

 ence in the Gases Evolved from some Hydrogenated 

 Flames of Ions altogether -Analogous to those Produced 

 by Riintgen Rays, lilaurice de Broglie, 64 ; Traits de 

 Physique. O. D. Chwolson, 65 ; Instruments optiques 

 d'Oljsirvation et de Mcsure, Jules Raibaud, 68 ; Elemental 

 Weight .Accurately a Function of the Volution of Best 

 ■Space-symmetry Ratios, H. Newman Howard, 71, 239; 

 Determination of Vertical Motion of Air, during Balloon 

 Ascents, 84 ; Novel Technical Thermometer, Messrs. 

 Townson and -Mercer, 84; Colour of the Sea, J. V. 



Buchanan, F.R.S., 87; Static Method for Determining 

 the Vapour Pressures of Solids and Liquids, and the 

 \'apour Pressures of Mercury, Prof. Alex. Smith and 

 A. W. C. Menzies, 97 ; the Ascent of Sap, Leclerc Du 

 Sablon, 98 ; Sap-rising Forces in Living Wood, E. 

 Reinders, 181 ; Light and Sound, W. S. Franklin and 

 Barry Macnutt, E. Edser, 103 ; Coefficients of Com- 

 pressibility and of Dilation with Temperature of Certain 

 Pure Metals and .Alloys, Prof. S. Lussana, 118; the 

 Pressure of Light against the Source, the Recoil from 

 Light, Bakerian Lecture at Royal Society, Prof. J. H. 

 Poynting, F.R.S., and Dr. Guy Barlow, 139 ; Wonders 

 of Physical Science, E. E. Fournier, 168 ; Aqueous Solu- 

 tions of Ferrous Ammonium Sulphate Form a Good Filter 

 for Stopping Heat Rays, R. A. Houstoun and J. Logic, 

 182 ; Ultra-microscopic Method of Measuring the Electric 

 Charges Carried by Small Particles, Dr. F. Ohrenhaft, 

 182 ; Physical Society, 195 ; the Convection of Heat from 

 a Body Cooled by a Stream of Fluid, Dr. .A. Russell, 

 195; Hysteresis Loops and Lissajous's Figures, and on 

 the Energy Wasted in a Hysteresis Loop, Prof. S. P. 

 Thompson, 195 ; Cryoscopic Determination of the 

 Osmotic Pressures in some Plant Organs, W. R. G. 

 Atkins, 211 ; Duddell Oscillographs, 212 ; Vibration of a 

 Tuning Fork, Gabriel Sizes and G. Massol, 228 ; the 

 Temperature Coefficients of the Ferromagnetic Metals, 

 Dr. J. R. -Ashworth, 238; the Daily Alovement of the 

 Top of the Eiffel Tower, R. Bourgeois, 261 ; Diurnal 

 Variation of Level at Kimberley, Dr. J. R. Sutton, 262 ; 

 Electric and Magnetic Double Refraction, P. Langevin, 

 262 ; Effect of the Electric Discharge on Water Vapour, 

 E. Jacot, 262 ; Temperature of " Invar " Wire, B. F. E. 

 Keeling, 272 ; the Law of Variation of the Coefficient of 

 Specific Magnetisation of the Elements of Heating, 

 Kotaro Honda, 324 ; Spectrograph with a Prism having 

 Spherical Faces so Designed that the Image of the Slit 

 is in Focus on the Photographic Plate, M. C. F^ry, 343 : 

 New Form of Calorimeter, 343 ; the Law of Definite 

 Proportions, C. E., 364; Comparison of the Different 

 Methods of Measuring the Dielectric Constant, Paul 

 Floquet, 390 ; Thermal Expansion of Metals, Dr. E. 

 Griineisen, 403 ; \'ery Viscid Fluid to make Dumb-bell 

 by the Union of the Drops of Two Bubbles, C. G. Thorp, 

 436 ; Prof. C. V. Boys, 436 ; Measurements of the Exact 

 Volume of the Kilogram of Water, M. Darboux, 456 ; 

 Geschichtstafein der Physik, Prof. Felix .Auerbach, 457 ; 

 Death of Maurice L^vy, 4C8 ; Obituary Notice of, 502 ; 

 .Absolute Manometer for the Measurement of Gas Pres- 

 sures not Greater than a Few Thousandths of a Milli- 

 metre of Mercury, Dr. M. Knudsen, 471 ; Constitution of 

 Matter, Prof. Jean Becquerel, 506 ; Method for Prevent- 

 ing the Tarnishing of Silver-on-glass Parabolic Mirrors, 

 T. Thorp, 521 ; Velocity of Negative Ions in Hydrogen 

 at Atmospheric Pressure, A. M. Tyndall, 531 ; Law of 

 Resistance to Crushing of Cylindrical Bodies as a 

 Function of their Dimensions, F. Robin, 555 ; Application 

 of the Principle of .Archimides to the Exact Determina- 

 tion of Gaseous Densities, -A. Jacquerod and M. Turpaian, 

 556 ; see also British Association 



Physiographical Introduction to Geography, a. Prof. A. J. 

 Herbertson, 426 



Physiology : Structure, Development, and Morphological 

 Interpretation of the Pineal organs and adjacent parts 

 of the Brain in the Tuatara Sphenadon punctatus), 

 Prof. A. Dendy, 61 ; Comparative Toxicity of Theo- 

 bromine and Caffeine as Measured by their Direct Effects 

 upon the Contractility of Isolated Muscle, V. H. Veley 

 and Prof. .A. D. Waller, 62 ; Development of the Germ 

 Cells in the Mammalian Ovary, Dr. A. Louise M'llroy, 

 97 ; Handbuch der vergleichenden Physiologic, 102 ; Die 

 Saugetierontogenese in ihrer Bedeutung fur die Phylo- 

 genie der Wirbeltiere, Prof. A. A. W. Hubrecht, 134; 

 the Relative Size of the Heart in different Groups of 

 -Animals, Miss F. Buchanan, 148; Colour Vision at the 

 Ends of the Spectrum, Rt. Hon. Lord Rayleigh, O.M., 

 F.R.S., 204; Tests for Colour Vision, 208; Commander 

 D. Wilson-Barker, 363 ; Colour-Blindness and Colour- 

 Perception, Dr. F. W. Edridffo-Green, 263 ; Colour-vision. 

 R. M. Deelcy, 267 ; Tests for Colour-Blindness, Dr. F. W. 

 Edridge-Green, 49-; : the Reviewer, 405 ; Siijht Tests in 

 the Alercantile .Marine, 537 ; Death and Obituary Notice 



