Nature, Dec. 2, 1886] 
Eruption, J. Martin, Prof. J. W. Judd, F.R.S.,; 512; Vol- 
canic Dust in, Mr. Pond on, 488 ; Volcanic Ash from, J. Joly, 
595; Geysers of Rotorua, E. W. Bucke, 5125 Ascent of 
Tarawera, Percy Smith, 544; Fish-Culture in, 555; New 
Zealand Institute, 580 
Newcastle-upon- Tyne Free Library, 555 
Newcomb (Prof. S.) : on the Velocity of Light, 29 ; Determina- 
tion of the Velocity of Light, Miss A. M. Clerke, 170, 193 ; 
Red Sunsets and Volcanic Eruptions, 340 
Newton (Prof. H. A.): the Biela Meteors of November 27, 
1885, 207 ; Meteorites, Meteors, and Shooting-Stars, 532 
Newton Abbot, Scrobicularia Bed containing Human Bones 
in, W. Pengelly, 513 
Niagara Falls: Study and Discussion of the Interesting Pheno- 
mena of the, 396: American Association Excursion to, 559 
Nickel at High Temperatures, Electrical Resistance of, Prof. 
C. G. Knott, 306 
Nikitin (M.), Glaciers in Russia, 604 
Nikolsky (M.), the Drying up and Fauna of Lake Balkhash, 
201 
Nimptsch (Lieut. von), Explorations in the Congo Country, 226 
Nitella, a Remarkable Species of, Whitelegge, 283 
Nitrate of Soda Competition, the, 199 
Nitrates, Secretion of, through Urine, Dr. Gossels, 164 
Nitric Acid, Action of Myristic Acid, H. Noerdlinger, 492 
Nitrifying Organism, Distribution of the, in the Soil, R. 
Warington, F.R.S., 511 
Nitrogen, Spectrum of the Negative Pole of, M. H. Des- 
landres, 380 
Nixon (R. J. C.), Euclid Revised, 50 
Nodon (A.), Registering Hygrometer, 188 
Noerdlinger (H.), Action of Nitric on Myristic Acid, 492 
Nolan (James), Tidal Friction and the Evolution of a Satellite, 
286 
Nomenclature, Scientific, G. M. Minchin, 76; G. Griffith, 122 
Non-Euclidian Geometry Vindicated, F. W. Frankland, 521 
Scapa (Baron), Atomic Weights of certain Rare Metals, 
404 
North America, Classification of the Cambrian System of, Chas. 
D. Walcott, 402 
‘North Downs, the Crag Deposits on the, Rev. A. Irving, 387 
North (Marianne), Paintings of Plants and their Homes, Kew 
Catalogue, W. B. Hemsley, A.L.S., 143 
North Pole, Expedition to the, Colonel Gilder, 490 
Norway: Herr Schéyen on ‘‘ Krog,” or Barley-Pest, 39 ; 
Handy Guide to, Thos. B. Wilson, R.A., 168 ; Destruction 
of Fir and Spruce Cones in Western, 300; Remarkable In- 
stance of the Power of Lightning during a Severe Thunder- 
storm in Central, 323; Ingenious Plan for Disseminating the 
Weather Reports of the Norwegian Meteorological Institute 
of Christiania, 347 
Notarisia, 626 
Nottingham University College Technical Schools, 303 
Nottingham Free Natural History Museum, Arranging the 
Contents of, 323 
Nova Ouionis, J. E. Gore, 202 
November Meteors, Baron Schwerin, 60 
Numbers, Indivisibility of certain Whole, 314 
Numbers, Sign-, in Use among the Masai, J. Thomson, 522 
Numeration, Primitive Forms of, M. Letourneau, 185 
Nuovo Giornale Botanico Italiano, 403 
Observatories : New Belgian Observatory, 61 ; Observatory at 
Bamberg, Dr. Hartwig, 109; Paris, 110; Visitation of the 
Royal, 122; Madras Observatory, 131; Melbourne, 155 ; 
Hong Kong, 148, 174, 572; Potsdam, 176; Strasburg, 247 ; 
Stockholm, 277; Yale College, 435 ; Ben Nevis, 460; Prof. 
Holden’s Work at Washburn, 490; New Observatory in La 
Plata, 531 ; Rio Janeiro, M. Cruls, 563, 604; Bouzareah, 
570; Pulkowa, 579; the Lick, 603; German Naval Obser- 
vatory, 624 ; Earthquake-Recorders for Use in, Prof. J. A. 
Ewing, 343 
October, Gales in, W. F. Denning, 596 
Odell (W.), Education in the United States, 55 
Odessa Observatory, Electrical Observations at, 577 
_ Odling (Prof., F.R.S.), on some Decompositions of Benzoic 
Acid, 512 
Odoriferous Woods of Cochin China, Dr. Tirant, 245 
Ohio, F. W..Putnam’s Report of the Explorations in, 397 
Oil, Use of, in Lighthouses, &c., Sir J. N. Douglass, 502 
INDEX 
XXUl 
Oils, Resins, and Varnishes, Prof. R. Meldola, F.R.S., 213 
Olenell Zone of North America, Prof. W. C. Brogger, 164 
Olliff (A. Sidney, F.E.S.), a New Aphanipterous Insect from 
New South Wales, 95 ; Coleoptera of Australia, 611 
Oolitic Floras in West of France and England, Affinities of, M. 
L. Crié; 540 
Ophiopholis and Echinarachnius, Development of, W. Fewkes, 
132 
Ophiures, Circulatory Apparatus of the, R. Koehler, 516 
Oppenheim (Dr. S.), Comet Fabry, 16; Comet Brooks III., 
202 
Oppélzer (Chevalier Théodore d’), Traité de la Determination 
des Orbites des Cométes et des Planétes, 310 
Optics: Protective Influence of Black Colour from Light and 
Heat, 2; Acoustics, Light, and Heat, by W. Lees, M.A., 
27; Prof. Newcomb, of the Velocity of Light, 29; Prof. 
Newcomb’s Determination of the Velocity of Light, A. M. 
Clerke, 170 ; Influence of Motion of the Medium on Velocity 
of Light, M. A. Cornu, 139; A. A. Richardson and E. 
W. Morley, 158 ; New Form of Stereoscope, A. Stroh, 68 ; 
Telescopic Objectives and Mirrors, H. Grubb, F.R.S., 85 ; 
an Elementary Treatise on Geometrical Objects, W. Steadman 
Aldis, 334; Construction of Reflecting Telescopes, H. F. 
Madsen, 463; Standards of Light, 479; New Optical Glass, 
622 
Oran and Tunis Railway, 627 
Orange Mountain, New Jersey, Columnar Structure in Igneous 
Rocks, J. P. Iddings, 158 
Orbit of Comet 1873 VII., Schulhof’s Researches on, 278 
Orbits, Cometary and Planetary, Chevalier Theodore d’Oppéolzer, 
310 
Orchid Family, on the Effects of Pollinisation in the, M. Léon 
Guignard, 308 
Orchideze of the Mudgee District, A. G. Hamilton, 611 
Orchids, F. Sander, 541 
Ordnance Committee, Policy of, 517 
O'Reilly (J. P.), Catalogue of Earthquakes in Europe, &c., 
465; Late American Earthquake and its Limits, 569 
Organic Evolution, Duke of Argyll, 335 ; Dr. Geo. J. Romanes, 
F.R.S., 360 
Organisms, Microscopic, in Air and Water, M. le Dr. Miquel, 
318 
Orientalists, List of International Congresses of, 529 
Origin of Chinese Arts, Sciences, &c., Dr. Edkins on, 60 
Origin of Colours in Insects, J. W. Slater, 70 
Origin of an Epidemic, in Quest of the, 393 
Origin of Mountain Ranges, T. M. Reade, 602 
Origin of Species, Physiological Selection, an Additional Sug- 
gestion on the, Dr. Geo. J. Romanes, F.R.S., 314, 336, 360, 
362, 407, 439, 537, 545; Prof. R. Meldola, F.R.S., 384; S- 
B. Mitra, 385 ; E. Catchpool, 617 
Origin of Tissue, Larval Theory of, A. Hyatt, 158 
Origin of Varieties, Francis Galton, F.R.S., 395 
Orionis, Nova, J. E. Gore, 202 
Ormerod (Miss), on the Hessian Fly, 458 
Ornithology: Protective Imitation, 3; Do Migratory Birds 
return to their Old Haunts ?, F. C. Taylor, 53; Sale of Sir 
W. Jardine’s, F.R.S., Ornithological Collection, 196 ; Orni- 
thological Explorations in the Commander Islands and Kam- 
chatka, Leonhard Stejneger, 323; Avifauna Italica, Dr. E- 
H. Giglioli, 593; Trochilide, J. Gould, B. Sharpe, 602 ; 
Birds in the Lucknow Museum, 602; Recent Ornithological 
Works, R. B. Sharpe, 618; British Birds’ Eggs, A. G. 
Butler, 619; Ornithological Explorations in Commander 
Islands and Kamchatka, Dr. L. Stejneger, 619. See a/so Birds 
Oscillation, Pendulum, M. H. Maw, 76 
Ostersund, Mirage at, 108 
Ostracoda, Prof. T. R. Jones, F.R.S., and J. W. Kirkby, 138 
Otago: Acclimatisation Society, 501, 555 ; University Museum 
of, 635 
Otto (R.), Removal of Arsenic from Hydrochloric Acid, 492 
Our Island Continent, a Naturalist’s Holiday in Australia, Dr. 
J. E. Taylor, 168 
Ouvrard (L.) and L. Troost, on some Double Phosphates of 
Thorium and Potassium or of Zirconium and Potassium, 211 
Oxalic Acid: MM. Berthelot and André on the Formation of, in 
Plants, 47; Actinometry by, A. Downes, 547 
Oxford Clay, on the Decapod Crustaceans of the, James Carter, 
258 
Oxidation of Hydrochloric Acid under Influence of Light, L- 
Backelandt, 159 L 
