I 



Suppl ment to Naiure,~\ 

 June It, J8g6 J 



Index 



xxvii 



ights of Ships, i6i ; Improbability of finding Isolated Open- 

 lea Shoals by the Chart, G. W. Littlehales, 452 

 jbula. Hind's Variable, Prof. Barnard, 255 

 ula, the New Merope, Prof. Barnard, 62 

 uloe, Number of, Dr. Dreyer, 62 

 Webular Theory, Notes on the, in Relation to Stellar, Solar, 

 Planetary, Cometary, and Geological Phenomena, William 

 P'ord Stanley, 25 

 Xeliulosities around the Pleiades, 138 

 Neesen (F.), Passage of Electricity through Gases, 262 

 Xeesen (Prof.), Two Lightning Strokes, 336; Method of 

 Measuring Velocity of Projectiles, 336; Experiments with 

 Rontgen Rays, 503 

 Negri (Christophe), Death of, 443, 562 



Xehring (Prof. A.), a New Human Skull of a Low Type from 

 Brazil, Prof. A. C. Haddon, 548 ; asserted Oldest Human 

 Teeth yet found in Europe, 564 



St (W. ), Method of determining Dielectric Constants, 453 

 impede Passage of Winged Insects ? Does a, Felix 

 lateau, 309 



rology : the Growth of the Brain, H. H. Donaldson, F. A. 

 "elby, 98 

 Britain, a Collection of Plants from, I. H. Burkill, 455 

 South Wales : New South Wales Linnean Society, 72, 192, 

 ; Timbarra Gold Fields, G. W. Card, 178 ; Bingara 

 mond Fields, G. A. Stonier, 178; Science in New South 

 ales, John Plummer, 303 

 York, Violent Wind-storm in, 252 

 York Storm of March 2-3, 471 



York Academy of Sciences, Annual Exhibition of, 543 

 bigin (Marion), the Metallic Colours of Humming-birds 

 and Sun-birds, 407 



wcomh (Prof. Simon, F.RS.), the Influence of Atmospheric 

 md Oceanic Currents upon Terrestrial Latitudes, 618 

 -\cwth (G. S.), Action of Hydrofluoric Acid on Crystallised 



Silicon, 119 

 Newton and Co.'s New Method for showing Stereoscopic Pictures 



with Magic Lantern, 228 

 Nicol (W. W. J.), Molecular Volumes of Organic Substances in 



Solution, 310 

 Xicoll (Dr. W. W. J.), the Iodine Molecule in Solution, 383 

 Xipher (Prof.), the Rontgen Rays, 421 

 Nodes of a Bell, a Lecture Experiment on the, G. Osborn, 



223 ; R. L. Taylor, 272 ; H. G. Williams, 367 

 Nodon (A.), the Rontgen Rays, 349, 359 

 Nomenclature of Colours, the, Prof. J. H. Pillsbury, 55 ; Louis 



Prang, 55 

 Nomenclature, Zoological, 427 

 North Pole, rumoured Attainment by Dr. Nansen of the, 372, 



400, 420 

 Northerly Wind in Winter Seasons, 174 

 Northupite, W. M. Foote, 262 

 Northward Extension of the Antarctic Continent, the former, 



Theo. Gill, 366 

 \ irvvay. Northern, Data as to Cloudiness in, Prof. H. Mohn, 



544 

 Xcnak (V.), Opacity for X-Rays of Various Substances, 613 

 Novaya Zemlya Geological Expedition, the Russian, M, 



Tchernyschaff, 325 

 November Meteors, the, W. F. Denning, 54 

 Nugues (E.), Condition for Maximum Power of Crookes' Tuljes, 

 ,575 



Nukamiso, M. Inouye, 137 

 Xuovo Giornale Botanico Italiano, 45, 166, 334 

 Xutation, the Constant of. Dr. Chandler, 229 

 Xuttall (Dr. S.), Experiments in Bacteria-free Animals, 576 



Gates (Eugene W.), the Spiders of Burma, 122 

 Oberbeck (A.), the Cooling Effects of Air Currents, 94 

 Oberflachen oder Schiller-Farben, Die, Dr. B. Walter, 148 

 Objective Prism, Stellar Velocities with, M, Deslandres, 255 

 Observatories : an Account of the Construction and Standard- 

 isation of Apparatus recently acquired by Kew Observatory 

 for the Measurement of Temperature, E. H. Griffiths, F.R.S., 

 39 ; a New Observatory at Minnesota, 162 ; a New 

 Australian Observatory, 280 ; the Yerkes Observatory, 495 ; 

 the Royal Observatory at Edinburgh, 545, 605 

 < >reanic Currents upon Terrestrial Latitudes, the Influence of 

 Atmospheric and, Prof. Simon Newcomb, F.R.S., 618 



Occultations, Computations of the Times of Solar Eclipses and, 

 L. Cruls, 474 



Ofterdinger (Dr.), Death of, 609 



Ogilvie (Dr. Maria M.), Open Air Studies : an Introduction to 

 Geology Out-of-doors, Prof. Grenville A. J. Cole, 337 



Olcott (Colonel H. S.), the Barisal Gun, 130 



Oligochoeta, a Monograph of the Order of, F. E. Beddard, 

 F.R.S., W. B. Benham, 74 



Onnes (Prof. Kamerlingh), the Variation with Temperature of 

 the Hall Effect in Bismuth, 48 ; Means of finding Dimensions 

 of Hydrogen-Liquefying Apparatus, 552 



Open Air Studies : an Introcluction to Geology Out-of-doors, 

 Prof. Grenville A. J. Cole, Dr. Maria M. Ogilvie, 337 



Optics : Mac Cullagh's Theory of the /Ether, Dr. J. Larmor, 

 F.R.S., 5 ; MacCullagh's Theory of Double Refraction, 

 A. B. Basset, F.R.S., 55; Demonstration of Caustics, R. 

 W. Wood, 23 ; Measurement of the Refractive Index of 

 Glowing Platinum, Dr. Zeeman, 48 ; Recent Improvements 

 in Lighthouse Illumination, 56 ; the Perception of Light, Sir 

 G. G. Stokes, F.R.S., 66; Luminescence of Solids and 

 Solid Solutions, E. Wiedemann and G. C. Schmidt, 94 ; the 

 Absorption of Kathode Rays, P. Lenard, 94 ; Anomalous 

 Dispersion Curves, A. Pfluger, 94 ; Experiments on Re- 

 fractive Index of Water and Alcohol for Electrical Rays of 

 Short Wave-Length, D. C. Cole, 120; a Perfectly Black 

 Body, W. Wien and O. Lummer, 136; Effect of Mutual 

 Replacement of Manganese and Iron on Optical Properties of 

 Litheophylite and Triphylite, S. L. Penfield and J. H. Pratt, 

 190 ; Newton and Go's New Method for showing Stereoscopic 

 Pictures with Magic Lantern, 228 ; Recent Progress in Optics, 

 Prof. W. Le Conte Stevens, 233 ; Rontgen Rays, 253 ; some 

 Properties of the Rontgen Rays, Jean Perrin, 335 ; the 

 Rontgen Rays and Optically Active Substances, Prof. Percy 

 F. Frankland, F.R.S., 556; the Refraction of the Rontgen 

 Rays, F. Beauland, 551 ; Inaction of X-rays on Pkycomyces- 

 nitens, L. Errera, 552 ; Graphic Methods of determining 

 Focal-lengths of Lenses and Mirrors, Dr. E. H. Barton, 254 ; 

 Movable Light Phenomena caused by Electric Oscillations in 

 Rarefied Gases, J. Ebster and H. Geitel, 262 ; Absorption of 

 Light by Solutions of Indophenols, MM. Bayrac and Ch. 

 Camichel, 335 ; Dark Light, Gustave Le Bon, 335 ; Le 

 Bon's " Black Light," merely a False Light, 600 ; the 

 Positions of Retinal Images, Mrs. C. Ladd Franklin, 341 ; 

 Acetylene Theory of Luminosity, V. B. Lewes, 357 ; Rotation 

 of Optically Active Compounds in Organic Solvents, P. 

 Frankland and R. H. Pickard, 357 ; Two General Pro- 

 positions in Theory of Light, Prof. Lorenz, 359 ; Longitudinal 

 Light, G. Jaumann, 374 ; Radiations emitted by Phosphor- 

 escence, H. Becquerel, 431 ; the Visual Purple of Fishes, Dr. 

 Abelsdorff", 503 ; Fluorescence of Sodium and Potassium 

 Vapour, E. Wiedemann and G. C. Schmidt, 526 ; Invisible 

 Radiations emitted byjUranium Salts, H. Becquerel, 527, 551 ; 

 Simple Huyghens' Apparatus for the Optical Lantern, F. W. 

 McNair, 535 ; the Action of Light on the Iris, demonstrated 

 by a New Pupilometer, Prof. Charles Henry, 568 ; Angular 

 Measurement of Axial Emergences, W. J. Pope, 599 ; Rota- 

 tory Dispersion of Active Non- Polymerised Liquid Bodies, 

 P. A. Guye and C. Jordan, 624 



Opium-smoking, H. Moissan, 445 



Orbit of o-Centauri, Dr. Doberck, 351 



Orbit of 8-Cephei, Dr. Belopolsky, 448 



Orbits and Origin of Comets, V. Wellmann, 180 



Ore, Classifying Crushed, by Trommels, Henry Rosales, 4^7 ; 

 Dr. T. K. Rose, 488 



O'Reilly (Prof. J. P.), Remarkable Sounds, loi 



O'Reilly (Dr. M. F.), the Aurora at Waterford, 437 



Organic Chemistry, a Laboratory Manual of, Dr. Lassar Cohn, 

 J. B. Cohen, 195 



Organic Evolution, the Primary Factors of. Prof. E. D. Cop^ 

 Dr. Alfred R. Wallace, F.R.S., 553 



Organisation of Science, the. 97 



Origin of Plant Structures, Rev. Geo. Henslow, 271 



Orkney Lepidoptera, Mr. Adkin's Collection of, 70 



Ormerod (Miss E. A.), Watercress and Herons, 610 



Ornithology : the Structure and Life of Birds, F. W, Headley, 

 3; a Rare British Bird, the Spotted Redshank {Toianus 

 fusctis), 88 ; Dendrexetastes capitoides. Dr. P. L. Sclater, 

 F.R.S., 102; the Habits of the Cuckoo, Dr. E. Rey, 176; 

 Annie Ley, 223 ; the Opercular Neck-fold in Embryo Ratite 

 Birds, Prof. Nassonow, 279 ;'the Seebohm Collection, Dr. R. 



