XXVI 



Index 



V Nature, 

 \.April\i, 1915 



Nitric Oxide, Action on Peroxides in Water, B. C. Dutt 



and S. N. Sen, 28 

 Nitrogen : Fixation of Atmospheric Nitrogen, 38 ; Dr. J. 



Knox, 447 ; Spectroscopic Investigations of Active 



Nitrogen, W. Jevons, 383 

 Norfolk : Flora, W. A. Nicholson, 57 ; Early Trackway, 



W. G. Clarke and H. D. Hewitt, 572 

 North American Frogs and Toads, A. H. Wright, 349 

 Northampton Polytechnic Institute, no 

 Nova Scotia, Geological Map, 95 

 Novae, Spectra at a Very Late Stage, W. S. Adams and 



F. G. Pease, 373 



Objective, Tests of a 24-inch, 240 



Observatory, U.S. Naval, 599 



CEdanometer, New, for Expansive Force of Wet Seeds, 

 Prof. J. B. Butler and J. M. Sheridan, 525 



Oil : Oils, Fats, and Waxes, Dr. J. Lewkowitsch, 334 ; 

 Trinidad Oilfields, J. Cadman, 488 ; Oil for Insulations, 

 etc., in Electric Engineering, 542 ; Thymol and Car- 

 vacrol Supply, 542 ; Petroliferous Mounds of Texas, J. 

 Chautaud, 609 



Okapi, Horns, 569 



Old Masters, Pigments of. Prof. A. P. Laurie, Prof. W. M. 

 Gardner, 276 



Optics: Type-reading Optophone, E. E. F. d'Albe, 4; 

 Optical Activity of Compounds, A. Werner, 27 ; Optical 

 Theories, Prof. Mallik, 65 ; Glass for Optical Purposes, 

 S. D. Chalmers, 117; Optical Glass Imports and Ger- 

 man Exports, 523 ; Tests of a 24-inch Objective, 240 ; 

 Testing Mirrors and Objectives, G. Bigourdan, 599 ; 

 Optical Projectors, Range of, A. Blondel, 608 ; Measur- 

 ing Focus of a Photographic Lens, T. Smith, 662 ; 

 See also Light 



Optophone, Type-Reading, E. E. Fournier d'Albe, 4 



Orbits of a Charged Particle, Prof. W. M. Hicks, 718 



Ore, Heat developed in Crushing, J. Cook, 636 



Organisation of Science, Dr. R. S. Woodward, Sir R. Ross, 

 366 



Origin of Species, N. B. Pierce, 34 



Ornithological Notes, 264, 653 



Osmotic Pressures ifi Plants, Prof. H. H. Dixon and 

 W. R. G. Atkins, 525, 691 



Ostrich W'ire-worm, R. Issel, 220 



Oxford : Peel Museum, 343 ; Oxford Outline Maps, Prof. 

 A. J. Herbertson, 641 



Oxidases in Plants, W. R. G. Atkins, 384 



Paisley Naturalists' Society, Transactions, 504 



Palaeobotany : Catalogue of Mesozoic Plants in the British 

 Museum : Cretaceous Flora, Dr. Marie C. Stopes, Prof. 

 A. C. Seward, 55 ; Lepidostrobus kentuckiensis. Dr. 

 D. H. Scott, 690 



Palaeolithic Implements near Cape Town, I^. P^ringuej", 27 ; 

 Palaeolithic Age in Egypt, Prof. Petrie, 497 



Palaeontology : Australasian Fossils, F. Chapman, 83 ; New 

 Zealand, 96 ; Animals of the Past, F. A. Lucas, 141 ; 

 Foraminifera of Kerimba Archipelago, E. Heron-Allen 

 and A. Earland, 273 ; New Ciripede, T. H. Withers, 

 273 ; Triassic Cephalopods and Accelerated Develop- 

 ment, Prof. J. Perrin Smith, 318; Palaeontology, Profs. 

 Abel and Jongmans, 360 ; Variation in a Carboniferous 

 Brachiopod, H. Day, 384 ; New Reptile from the Cape 

 Permian, D. M. S. Watson, 412 ; New Canadian Dino- 

 saurs, B. Brown, 492 ; British Columbia and Alberta, 

 468 ; Restoration of an Ichthyosaur, 599 



Paper from Hedychium Plants, 570 



Parallaxes of Helium Stars, Prof. Kapteyn, 66 ; Magnitude 

 Error in Parallax, Prof. Kapteyn, 709 ; Stellar Paral- 

 laxes, O. R. Walkey, 320 



Parasites : Flagellate Protozoa in the " Blind-fly " on Robben 

 Island, H. Bayon, 247; Insect Flagellates in Verte- 

 brates, Dr. Fantham and Dr. .-\nnie Porter, 441 



Paris : Paris-Nice Longitude Difference, 239 ; Paris Observa- 

 tory, 320 ; Paris Academy of Sciences : Prize Awards 

 1914, 518: Presidential Address, P. Appell, 572 ; Prizes 

 proposed for 1916, 629 



Parthenogenesis, Artificial, J. Loeb, W. O. R. King, 30 



Pascal's Theorem, Hesse's Generalisation, Dr. T. Muir, 247 



Passalidae, Oriental, 238 



Patent Medicines Committee, 517 



Pattern-making, F. W. Turner and D. G. Town, 449 



Peat, Bacterial Treatment, Prof. W. B. Bottomley, 316 



Pectase, Action of, N. G. Ball, 384 



Peebles and Selkirk, G. C. Pringle, 335 



Penalty on Research, Sir W. Ramsay, 642 ; Prof. Hickson, 

 670 ; Hon. H. Onslow, A. T. Watson, 699 



Penguins, Antarctic, Dr. G. Murray Levick, 145 



Perak, Mining at Kinta, J. B. Scrivenor, 348 



Permeability, Production of High, bv Iron, Prof. E. Wilson, 

 383 



Peru, Resources, 179 



Petrographical Microscope, 314 



Petroliferous Mounds of Texas and Louisiana, J. Chautaud, 

 609 



Petrological Notes, N.S.W'. , W^ N. Benson, 301 



Pharmacy : British Pharmacopoeia, new issue, 592 ; 

 Synthetic Drugs in Great Britain, Prof. Thorpe, 593 



Pheasants and Covert Shooting, Capt. A. Maxwell, iii ; 

 Pheasants and Naval Guns, 622 ; Pheasants and Gun- 

 firing, Rev. H. C. Smith, 643 



Phenacetine, 594 



Philadelphia Meeting of the American .Association, 563 



Philippines: Types, R. B. Bean, 6; Pottery Making, E. B. 

 Christie, 207 ; Irrigation in Ilocos Norte, E. B. Christie, 

 237 ; Rainfall, Rev. M. S. Mazo, 348 ; Weather, 540 



Philosophy : Greek Philosophy, J. Burnet, Capt. J. H. Hard- 

 castle, 223 ; a Theory of Civilisation, S. O. G. Douglas, 

 278 ; Our Knowledge of the External World, B. RusseK 

 278 ; Philosophy of Biology, Dr. J. Johnstone, 303 ; 

 Henri Bergson, A. Ruhe and N. M. Paul, 474 ; Ideal- 

 istic Reaction, Prof. Aliotta, A. McCaskill, 474 



Philothion in Crystalline Lens, J. de Rey-Pailhade, 581 



Photo-Chemistry, Dr. S. E. Sheppard, 277 



Photo-Electricity, Prof. A. LI. Hughes, 277 



Photography : Effect of Humidity on Photographic Plates, . 

 Dr. C. E. K. Mees, 239 ; Camera in Australia, Prof. T. 

 Johnson, 450 ; Colour Sensitised Plates, C. Jones, 

 676, 701 ; British Journal Photographic Almanac, 19 15, 

 697 



Photomicrography, Handbook, H. LI. Hind and W. B. 

 Randies, 33 



Phototropy, J. R. Mourelo, 663 



Phylogeny of Plants, Prof. v. Wettstein ; of Animals, Profs. 

 Heider and Boas, 360 



Ph3'sical Society : Presidential Address. Sir J. J. Thomson, 

 293 ; Streaks on Lath and Plaster Walls, T. Cope, 562 ; 

 Dr. Aitken, R. M. Deeley, 615 



Phj'sics : Text-book of Physics : Electricity and Magnetism. 

 Prof. J. H. Poynting and Sir J. j. Thomson, 56 ; 

 Fizeau's Experiment and the Principle of Relativity, E. 

 Cunningham, 197, 226, 281 ; Sir J. Larmor, 281 ; 

 X-Ray .Spectrometer, 199 ; lonisation, Sir J. J. Thom- 

 son, 203 ; Gyroscopic Motion, H. Crabtree, Prof. Boys, 

 332 ; Physics and Astronomy at the British .Associa- 

 tion, 349 ; Constitution of the Atom : Address, Sir 

 W. Crookes, 367 ; Theory of Relativity, Dr. L. Silber- 

 stein, 387 ; a Central Thought of Vector Analysis, 

 Prof. F. Slate, 392 ; Physics of the Household, Prof. 

 C. J. Lynde, 416 ; Nomenclature and Symbols, 541 ; 

 Electrical Notation, Sir O. Lodge, 588; Lord Kelvin's 

 Work on Gyrostatics, Prof. A. Gray, 711 ; Orbits of a 

 Charged Particle, Prof. W. M. Hicks, 718 



Physiography, College, Prof. R. S. Tarr, Prof. L. Martin, 

 Prof. Cole, 666 



Physiology : British Association Address : Value of Research 

 in Development of National Health, Prof. Ben. Moore, 

 74 ; Death of Dr. W. H. Gaskell, Prof. Langley, 93 ; 

 Physiology at the British Association, 322 ; Respiratory 

 Function of the Blood, J. Barcroft, 331 ; Hypnotism 

 and Katalepsy, E. Mangold, 338 ; Philothion in 

 Crystalline Lens, J. de R. Pailhade, 581 ; Chloralose, 

 M. Tiffeneau, 581 ; First Book, of Physiology and 

 Hygiene, Gertrude D. Cathcart, 615; Physiology of 

 Reproduction in Crustacea, G. Smith, 635 ; Nerves, 

 Dr. D. F. Harris, 669 ; Excitatory Process in Dog's 

 Heart, T. Lewis and M. A. Rothschild, 690 : Variation 

 in Growth of Mammalian Tissue, .\. J. Walton, 690 



