Nature. 
June 9, 1904 
Index 
XXXV 
Oat Hybrids, Variation in, John H. Wilson, 413 
Oates (E. W.), Catalogue of the Collection of Birds’ Eggs 
in the British Museum (Nat. Hist.), 218 
Observatories: the Magnetic Storm of October 31, 1903, 
Superintendent Observatory Department, National 
Physical Laboratory, 56; Solar Observations at Lyons 
Observatory during 1902, J. Guillaume, 65; Publications 
of the Pulkowa Observatory, M. Nyren, 114; Companion 
to the Observatory, 207; Mr. Tebbutt’s Report of the 
Windsor, N.S.W., Observatory, 259; the United States 
Naval Observatory, Captain C. M. Chester, 330; Report 
of the Harvard College Observatory, Prof. E. C. Picker- 
ing, 350; Meridian-circle Observations at the Lick 
Observatory, Richard H. Tucker, 378 
Ocean Currents, Bottle and, John Paterson, 539 
O’Gorman (Mervyn), O’Gorman’s Motor Pocket Book, 
484 
Old Red Sandstone, the Position of the, in the Geological 
Succession, A. G. M. Thomson, 53 
Oldham (R. D.), the Growth of Sandhills, 138 
Oliver (Prof. F. W.), the Paleozoic Seed, Lagenostoma 
Lomaxt, 334 
Omond (Dr. R. T.), Dr. Shaw’s Address at the British 
Association, 6; Curious Shadow Effects, 369 
Omori (Dr.), Seismograms of Distant Earthquakes, 161 
Onslow (Earl of), British Forestry, 469 
Optics: Convenient Method for Determining the Constants 
of Lenses, Ch. Féry, 35; Light Waves and their Uses, 
A. A. Michelson, 50; the Two Classes of Colour-blind 
Persons, Dr. F. W. Edridge-Green, 71; Photometry of 
Lights of Different Colours, Charles Fabry, 72; Method 
of Measuring the Gradual Falling-off in the Intensity 
of the Phosphorescence of Bodies Excited by Kathode 
Rays, Fritz Buchner, 89; the Sensation of Light Pro- 
duced by Radium Rays and its Relation to the Visual 
Purple, W. B. Hardy and H. K. Anderson, 94; Colour 
Changes brought about by Radium Rays, W. Ackroyd, 
113; Measurement of very Small Angles of Rotation, 
Marcel Brillouin, 95; Reinforcement of the Action of the 
Bundle of Light Rays upon the Eye, when Accompanied 
by the n-Rays, R. Blondlot, 119; Natural Rotary Power 
of Certain Bodies for the n-Rays, H. Bagard, 503; 
Prismatic Method of Determining Indices of Refraction, 
G. F. Herbert Smith, 142; the Simmance-Abady 
“Flicker ’’ Photometer, Messrs. Simmance and Abady, 
164; Effect of Time in the Comparison of the Luminous 
Intensity of Coloured Lights, André Broca and D. Sulzer, 
167; on the Intensity of the Light Produced by the Sun, 
Charles Fabry, 167; Luminous Sensation as a Function 
of the Time for Coloured Light, André Broca and D. 
Sulzer, 192; Death of John Henry Brown, 204; Das 
Zeisswerk und die Carl-Zeiss-Stiftung in Jena, 221, 497; 
Crystals of Hexagonal Zinc Blende Crushed between 
Glass Plates Emit Light, M. Becquerel, 233; Sub- 
jective Images, Dr. Gerald Molloy, 271; Prof. 
Herbert McLeod, F.R.S., 297; Alex. Thurburn, 297; 
T. A. Vaughton, 297; Mrs. E. Hubbard, 318; A. E. 
Staley and Co.’s Prism Binocular, 327 ; Non-homocentric 
Pencils and the Shadows Produced by them, the Standard 
Astigmatic Pencil, W. Bennett, 335; New Case of Inter- 
ference and Diffraction, Prof. R. W. Wood, 335; 
Principle of Construction of an Optical Apparatus for 
Obtaining very High Magnifications, C. Chabrié, 359; 
Structure of the Eye of the Marsupial Mole, Miss G. 
Sweet, 450; Relation of Visual Efficiency to Visual 
Acuity, Dr. G. A. Berry, 479 ; Gesammelte Abhandlungen, 
Ernst Abbe, 497; Zur Theorie der Mikroskopischen Bild- 
erzeugung, Victor Grunberg, 497; the Helmholtz Theory 
of the Microscope, J. W. Gordon, 497; the Theory of 
Optical Images, Lord Rayleigh, 497; Optical Properties 
of Vitreous Silica, J. W. Gifford and W. A. Shenstone, 
F.R.S., 502; Shadows Produced by Axially Symmetrical 
Pencils Possessing Spherical Aberration, W. Bennett, 527; 
Compensation of Interferences and the Measurement of 
Small Thicknesses, Georges Meslin, 623 
Orang Outang, Ca’ing Whale, Corrections 
clature, Dr. Henry O. Forbes, 343 
Orbit of the Minor Planet Chicago (334), Prof. Kurt Laves, 
542 
Ore Deposits, a Discussion, 78 
in Nomen- 
Organic Colouring Matters, a Systematic Survey of the, 
Arthur G. Green, Prof. R. Meldola, F.R.S., 529 
Organic Evolution, a New Theory of, James W. Barclay, 
310 
Greener and Meteorites, Prof. James Ward, 393 
O’Reilly (Prof. Jos. P.), Notes on the Orientations and 
Certain Architectural Details of the Old Churches of 
Dalkey Town and Dalkey Island, Dublin, 140 
Oriental Studies in England and Abroad, Prol. T. W. Rhys 
Davids, 423 
Orientations and Certain Architectural Details of the Old 
Churches of Dalkey Town and Dalkey Island, Dublin, 
Notes on the, Prof. Jos. P. O’Reilly, 140 
Origin of the Australian Marsupials, Dr. Bensley, 284 
Origin of Spiral Nebulas, on the, Prof. J. M. Schaeberle, 
248 
Oren Nebula, Variable Stars of the, Prof. Ernst Hartwig, 
620 
Orion Stars, Radial Velocities of Twenty, Messrs. Frost 
and Adams, 446 
Ornithology: Turner on Birds, a Short and Succinct 
History of the Principal Birds Noticed by Pliny and Aris- 
totle, O. V. Aplin, 73; Among the Waterfowl, Herbert K. 
Job, O. V. Aplin, 72: the Waterfowl Family, L. C. Stan- 
ford, L. B. Bishop and T. S. Van Dyke, O. V. Aplin, 73 ; 
Method of Graphically Indicating the Duration of the 
Residence in the British Islands of the Various Members 
of the Bird-fauna, E. B. Waggett, 159; a Hand-list of 
the Genera and Species of Birds, R. B. Sharpe, 218; 
Catalogue of the Collection of Birds’ Eggs in the British 
Museum (Nat. Hist.), E. W. Oates and S. G. Reid, 218; 
Bird Life in Wild Wales, J. A. Walpole-Bond, O. V. 
Aplin, 272; Visitors from the High North in Central 
Italy, Prof. Henry H. Giglioli, 413 ; Some Indian Friends 
and Acquaintances, a Study of the Ways of Birds and 
other Animals Frequenting Indian Streets and Gardens, 
Lieut.-Colonel D. D. Cunningham, F.R.S., 433; “ Play- 
ground ’’ of Bower Bird, Scenopaeus dentirostris, E. M. 
Cornwall, 472; Parrakeets, a Handbook to the Imported 
Species, David Seth-Smith, 507; Remarkable Destruction 
of Birds in Cardigan Bay, C. W. Herbert Greaves, 512; 
Distribution of the Nightingale, Alfred O. Walker, 512; 
the Natural History of Venezuela, Eugéne André, 513 ; 
Bird Migration in Great Britain and Ireland, Wm. Eagle 
Clarke, 516; Halteridium of the Little Owl (Athene 
noctua), Trypanosoma noctuae, Herr Schaudinn, 566; 
Birds of Paradise in the ‘* Arabian Nights,’? Dr. A. R. 
Wallace, 617 
Orthochromatic Photography, Practical, Arthur Payne, 486 
Osborn (G.), Graphs, or the Graphical Representation of 
Algebraic Functions, 363 
Osborn (Prof. H. F.), Resting Position of the Tasmanian 
Wolf, 587 
Osburn (R. C.), Adaptation of Mammals to Aquatic Habits, 
112 
Oscillation in the Waters of Loch Ness, Internal, E. R. 
Watson, 174 
Osmond (F.), Meteoric Irons, 192 
Osmond (Floris), Microscopic Analysis of Metals, 553 
Ostwald (Prof. Wilhelm), Jubelband, 387 
Ostwald’s Klassiker der exakten Wissenschaften, 150 
Oxford Mathematical Society: Oxford and Science, Prof. 
John Perry, F.R.S., 207, 269 
Oxford and Science, Prof. John Perry, F.R.S., 207, 269; 
Dr. H. M. Vernon, 269 
Oxford and Cambridge, Science at, A. R. Hunt, 318; Prof. 
G. H. Bryan, F.R.S., 342 
Oysters and Sewage Contamination, Prof. E. J. McWeeney, 
455 
Pacific, Observations of a Naturalist in the, between 1896 
and 1899, Vanua Levu, Fiji, H. B. Guppy, Prof. T. G. 
Bonney, F.R.S., 31 
Pacific Ocean, Periodic Migrations between the Asiatic and 
the American Coasts of the, J. P. Smith, 542 
Page (T. E.), on School Curricula, 20 
Page (T. H.), Composition of Distilled Oil of Limes, 574 
Palzobotany: the Flora of the Uitenhage, A. C. Seward, 
91; Mycorhiza from the Coal-measures, Prof. Weiss, 119 ; 
