XVI 



Index 



r Nature, 

 Y April II, 1913 



Perry (Prof. John, F.R.S.), the Unit of Momentum, 144; 



Technical Institute Problems : Address at Belfast, 297 

 Peyrega (Mile. E.) and F. Vl^s, an Oxyhaemoglobin Band 



in the Ultra-violet Spectrum of Blood, 437 

 Pfeffer (Prof. W.), Mechanical Prevention of Sleep- 

 movements in Plants, 524 

 Philip (Mr.), Corrosion of Condenser Tubes by Contact 



with Electro-negative Substances, 427 

 Phillips (Rev. T. E. R.), Prof. Todd and Saturn's Rings, 



388 

 Phillott (Lieut. -Col. D. C), the Faras-Nama-e Rangln : or, 



the Book of the Horse, by '* Rang-In," 172 

 Philosophoff (Mme.), Secondary Education for Girls in 



Russia, 500 

 Picard (F.), Biology of the Potato-moth and its Occurrence 



in France, 436 

 Pick (G.), Parallel Lines and Translation, 539 

 Pickering (Prof. E. C), Photometric Observations of 



Asteroids, 565 

 Pike (O. G.), Photography of the Black-throated Diver, 426 

 Pilgrim (Guy), Tertiary Giraffes of India, 153 

 Pillsbury (Prof. W. B.), Essentials of Psychology, 273 

 Plassmann (Dr. J.), Jahrbuch der Naturwissenschaften, 



1910-11, 376 

 Piatt (Prof. A.), Aristotle's de Generatione Animalium 



translated into English, i 

 Plowman (T.), Tadpole of Frog, 213 

 Plummer (H. C), Hypothetical Parallaxes of the Brighter 



Stars of Type A, 402 

 Pluvinel (Comte de la B.), Spectra of Comets, 526 

 Pocock (R. I., F.R.S.), the Distastefulness of Anosia 



plexippus, 243 

 Pocock (R. W.), Chalk and Ice, 517 

 Pogue (J. E.), Natural " Rainbow " Bridge in S.E. Utah, 



324 



Poincar^ (H.), Theory of the Quanta, 268 



Popoff (K.), Cause possibly influencing Estimates of Star 

 Magnitude, 269 



Popplewell (W. C.), Experimental Determination of Stresses 

 in Steel and Concrete of Reinforced-concrete Columns, 388 



Porritt and Bankes (Messrs.), Nine Interesting Species of 

 British Insects, 89; the Moth Nonagria neurica, &c., 89 



Porter (J. Robertson), the Helicopter Flying-machine : an 

 Account of Previous Experiments and an Analysis of the 

 •Author's Turbine Machine, 346 



Porter (Miss M. W.) and Dr. A. E. H. Tutton, Relation- 

 ship between Crystalline Form and Chemical Constitu- 

 tion, 502 



Potts (F. A.), a New Tvpe of Parasitism in the Polychaeta, 

 268 



Poulton (Prof. E. B.), Mimicry in African Butterflies and 

 Moths, 26 



Poutrin (Dr.), the Pyg-my Races of Africa, 256 



Praeger (R. Lloyd), Clare Island Survey : Phanerogamia, 

 part ii., 165 



Preston (H. B.), Collection of Shells made by Mr. R. Kemp 

 in East Africa, 199 



Priestley (Dr. Josepli), Monument at Birstall, 184 



Pring (Dr. J. N.) and D. M. Fairlie, Synthesis of Hydro- 

 carbons and their Stability at High Temperatures and 

 Pressures, 235 



Prior (Dr. G. T.), the Meteoric Stone which Recently Fell 

 in Egypt, 165 



Pritchett (Dr. H. S.), Moral Influence of a University 

 Pension System, 96 



Putter (Prof. A.), Vergleichende Physiologie, 277 



Pulfrich (Carl), Stereoskopisches Sehen und Messen : 

 Original of the Article " Stereoscope " in the Encyclo- 

 paedia Britannica, 23 



Qu^nisset (F.), Photography of the Planet Venus and 



Existence of Spots, 269 

 Qu^nisset (F.) and others. Aspect of Mars, 259 



Radais (M.) and A. Sartory, Toxic Properties of the Mapou 

 {Agauria pyrifolia), 133 ; Toxicity of Amanita phalloides, 



403 

 Radau (M.), Death, 288; Obituary Note, 354 

 Rakshit (J. Nath), Sodiumdiacetamide, 337 



Ramsauer (Dr. Carl), the Weather of 191 1 and the Ultra- 

 violet Radiation of the Sun, 213 

 Ramsay (Sir William, K.C.B., F.R.S.), Higher Technical 



Instruction (British Association), 90 ; Biography of, by 



Prof. W. Ostwald (under " Scientific Worthies "), 339 ; 



Value of the " External " Degrees of the University of 



London, 445 ; Resignation, 455 

 Rankine (Dr. A. O.), Viscosities of Gaseous Chlorine and 



Bromine, 469 

 Rappin (M.), Antituberculous Vaccination and Serotherapy, 



201 

 Ravenna and Vecchi (Signori), Development of Hydrogen 



Cyanide during Germination of Seeds in presence of 



.Ammonium Salts, 564 

 Ravenna (C.) and M. Zamorani, Formation of Hydrocyanic 



.^cid during Germination of Seeds, 19 

 Ray (Prafalla Chandra) and Rasik Lai Datta, Allyl- 



ammonium Nitrite, 337 

 Ray (S. H.), Beach-la-Mar, Wm. Churchill, 295 

 Rayleigh (Lord), Propagation of Waves through a Stratified 



Medium and the Question of Reflection, 401 

 Raynaud (A.), Solubility of the Oxide UOj in various 



.Acids, 403 

 Rea (Carleton) and Sir H. C. Hawley, Fungi (Clare Island 



Survey), 505 

 Road (C. H.), Archaeology in the " Encyclopaedia 



Britannica," 432 

 Reboul (G.), Photographic Impressions on Copper, 269 ; 



Photochemical Actions and Photo-electrical Phenomena, 



573 

 Reed (F.), a Submerged Flexible-joint Water Main, 470 

 Reed (Prof. J. O.) and Prof. K. E. Guthe, College Physics, 



47S 



Regan (C. T.), Fresh-water Fishes of the British Isles, 373 



Reichel (Lady), Death, 130 



Reid (Clement, F.R.S.), Relation of present Plant Popula- 

 tion of the British Isles to the Glacial Period : British 

 Association Address, 57, 58 



Reid (Dr. G. .Archdall), Inheritance of Mental Characters, 

 142, 210; the Mnemic Theory of Heredity, 606 



Reid-Moir (J.), Fracture of Flint by Nature and by Man, 



295 

 Reinach (S.), Mythological Study, 17 

 Rekstad (J.), Glaciers in South Norway, 460 

 Renan (H.), Longitude Wireless Determinations, Paris- 



Bizerta, 269 

 Renaudot (Mile. G.), Distortion and Apparent Dilatation of 



Celestial Objects at the Horizon, 89 

 Rennell (Major J., First Surveyor-General of India), 



Journals, 417 

 Reynolds (Prof. Osborne, F.R.S.), Obituary Notice, 590 

 Rheinberg (Julius), English v. Continental Microscope 



Stands, 348 

 Rhousopoulos (O. A.), Methods of Cleansing and Preserving 



Antiquities, 86 

 Richardson (H.), Remarks at Meeting of Public School 



Science Masters' Association, 425 

 Ridgeway (Prof.), Celtic Burial Ground near Hallstatt in 



Upper Austria (" Encyclopaedia Britannica "), 343 

 Righi (Prof. A.), Theory of " Magnetic Rays " in Vacuum 



Tubes, 154 ; Sparks in Rarified Air and under the Action 



of a Magnetic Field, 437 

 Ristenpart (I?r.), Comet 191 le (Borrelly), 259; Observation 



of Comet 191 ic (Brooks), 292 

 Ritter (Prof. W. E.), Duties to the Public of Research 



Institutes, 355 

 Robert (Mile.), Influence of Calcium on Development and 



Mineral Composition of Aspergillus niger, 269 

 Roberts (A. H.), the Loch Leven Water-f)ower Works, 129 

 Roberts (Dr. R. D.), Death, 84 

 Robinson (R.), New Arguments in Favour of the Action of 



the Suprarenal Capsules on the Determination of Sex, i66 

 Robson (G. C), Observations to test G. Smith's Theory 



of the Effect of the Parasite Sacculina upon the Sexual 



Characters of the Host Crab Inachus, 125 

 Rochair (A.) and G. Colin, Action of Rays from the Quartz 



Mercury Vapour Lamp on the Colorability of the Acid- 

 resisting Bacilli. 269 

 Rodway (J.), In the Guiana Forest, 518 

 Rogers (J. D.), a Historical Geography of the British 



Colonies : vol. v., Canada, 440 



