XX 



Index 



tNatur*, 

 September 20, 1917 



Society of Natural Sciences, First General Meeting of 



the, 355 

 Argon and Neon, Expansion of, A. Leduc, 440 

 Arithmetic, The Supervision of, W. A. Jessup and L. D. 



Coffman, 322 

 Army : -Medical Services, Appointment of a Committee on 



the, 528 ; Supply of Officers for the Scientific Services 



of the, Col. B. R. Ward, 149 

 Arrowrock Dam, The, 393 



Arthropods, The Earliest Fresh-water, C. Schuchert, 140 

 Arts, Royal Society of, Impending Retirement of Sir H. 



Trueman Wood ; G. K. Menzies to succeed Sir H. T. 



Wood; Institution of a Trueman Wood Lectureship; 



The Albert Medal awarded to Orville Wright, 371 

 Asama-yama, Eruptions of the. Prof. Omori, 471 

 Asbestos, -Sources of, D. Currie, 233 

 Ashmole, Elias, F".R.S., Founder of the First Public Museum 



of Natural History, R. T. Gunther, 234 

 Ashton-under-Lyne, Sound of the Explosion at, 371 

 Asiatic Society ot Bengal. The Barclay Medal awarded to 



Col. H. H. Godwin-.Austen, 427 

 Assam : Primitive For.ns of Agricultural Implements from, 



H. Balfour, 429; The Oilfields of, H. S. M. Jack, 213 

 Association of .Assistant Masters in Secondary Schools, The 



Educational Policy of the Members of the, 458 



ASTRONOMICAL NOTES. 



Comets : 



Comet 1915a (Mellish), Mile. J. Vinter-Hansen, 72 ; Comet 

 1916& (\\'olf). Prof. Stromgren, 72 ; Comet 1917a 

 (Mellish), H2 ; D'Arrest's Periodic Comet, J. Braae, 

 112 ; Comet 1917a (Mellish), Mrs. J. Braae and J. 

 Fischer-Petersen, 133 ; Comet 1917a (Mellish), J. Braae 

 and J. Fischer-Petersen, 152 ; A New Comet, 172 ; Comet 

 h 1916 (Wolf), Prof. Crawfurd, 172 ; A New Comet 

 (Schaumasse), J. Braae, and J. Fischer-Petersen, 214; 

 Comet 19166 (Wolf), Prof. Crawfurd, 214; Comet 1917a 

 (Mellish), J. Fischer-Petersen, 214; Comet 1917a 

 (Mellish), 233 ; Comet 19176 (Schaumasse), J. Braae 

 and J. Fischer-Petersen, 271, 315; The Spectrum of 

 Comet 1917a (.Mellish), Prof. Frost, 315; Comet 1916b 

 (Wolf), Dr. Kobold, 332 ; Orbit of Comet 1915a 

 (Mellish), J. Rosenbaum, 353 ; Comet 1916b (Wolf), 

 Crawfurd and .Alter, 375; Comet 1917a (Mellish), Prof. 

 S. S. Hough, 375; Comet 1917b (Schaumasse), Fayet 

 and Schaumasse, 375 ," Comet 1916b (Wolf), Crawfurd 

 and Alter; Dr. Kobold, 454; Comet 1916b (Wolf), 

 Crawfurd and Alter, 532 



Meteors : 



Bright Meteors in March, W". F. Denning, 112; The 

 April Lyrids, 133, 172 ; The Aquarids of Halley's Comet, 

 214; Fireballs in June, W. F. Denning, 271; Meteors 

 on July 19, 431 ; The August Meteors of 1917, W'. F. 

 Denning, 493 



Observatories : 



Report of Mount Wilson Observatory, 1916, Prof. Hale, 

 193 ; Report of Stonyhurst College Observatory, Father 

 Sidgreaves, 252 ; Kodaikanal Observatory Report, J. 

 Evershed, 272 ; The Solar Physics Observatory, Cam- 

 bridge, 354; Annuario of the Rio de Janeiro Observa- 

 tory, 431 ; Union Observatory, Johannesburg, 472 



Planets : 

 The Ninth Satellite of Jupiter, Nicholson and Shap'.ey, 

 33; Photographs of Jupiter, J. H. Reynolds, no; 

 Variability of Uranus, Prof. E. C. Pickering, 133 ; 

 The Planet Mercury, 152 ; The Relativity Theory and 

 the Motion of Mercury's Perihelion, Dr. L. Silberstein, 

 412 ; New Elements of Mat's, Dr. F. E. Ross, 493 



Stars : 



Determination of Star Colours, F. H. Seares, 16; The 

 Variable Nebula N.G.C. 2261, Dr. V. M. Slipher, 54; 

 The Spectrum of N.G.C. 7023, Dr. M. Wolf, 92 ; 

 Monthly Star Maps for 1917, Dr. Blaikie, 93 ; Parallax 

 of a Planetary Nebula, A van Maanen, 153 ; Stellar 

 Spectra of Class R, 172 ; A New Catalogue of Double 

 Stars, R. Jonckheere, 193 ; The Problem of Spiral 

 Nebulae, Dr. Crommelin, 234 ; Two Eclipsing Variable 

 Stars, R. S. Chigan, 252; Parallax of Barnard's "Run- 

 away " Star, Prof. Schlesinger, 293 ; Distribution of Stars 

 of Type O, W. Gyilenberg, 293 ; Effective Temperatures 



of Stars, Dr. Wilsing, 315; The Eclipsing Variable 

 SS Camelopardalis, R. J. McDiarmid, 332 ; Hind's 

 Variable Nebula, Pease, 332 ; The Spectra of Nebulae, 

 Dr. W. H. Wright, 354 ; Rotation in Planetary Nebulae, 

 Prof. W. W. Campbell and W. H. Moore, 375 ; The 

 Nebulae and Stellar Evolution, Prof. W. W. Campbell, 

 393 ; Riadial Velocities of Five Cepheid Variables, G. F. 

 Paddock, 394 ; The Variable Star m Herculis, W. 

 Dziewulski, 413 ; Variable Proper Motion of 5 Cassio- 

 peiae, L. Courvoisier, 454 ; Discm'ery of a New Star, 

 Prof. Pickering, 472 ; Stellar Motions and Absolute 

 Magnitudes, W. S. .Adams and G. Stromberg, 472 ; 

 Measures of Ninety-eight Double Stars, 472 ; Observa- 

 tions of Mira Ceti, Prof.. Nijland, 512; Eclipsing 

 Variables, Prof. H. N. Russell, M. Fowler, and M. C. 

 l^rton, 512 ; Radial Velocities of Spiral Nebula, Dr. 

 V. M. Slipher, 532 



Sun : 



Effect of Haze on Solar Rotation Measures, St. John and 

 .Vdams ; De Lury, 32; Eclipse Test of Einstein's 

 Theory of Gravitation, Sir F. W. Dyson, 54 ; The Sun- 

 spot Zones, H. Arctowski, 72 ; Displacements of Solar 

 Lines, Dr. Royds, 234 ; Solar Prominences in Relation 

 to Sun-spots, Dr. O. J. Lee, 332 ; Solar Prominences, 

 J. and Mrs. Evershed, 432 ; Elements of the Sun's 

 Rotation, T. Epstein, 493 



Miscellaneous : 



The Manchester .Astronomical Society, 16 ; The Canadian 

 Observer's Handbook, 16 ; Imperial .Astronomical 

 Society of Russia, 93; The " .Annuaire Astronomique " 

 for 19 1 7, 133 ; Laboratory Work in Astrophysics, Dr. 

 A. S. King, 152 ; Persistent Aurora, ,Dr. V. M. Slipher, 

 193 ; New Zealand Time Service, C. E. .Adams, 252 ; 

 The Minimum Radiation Visually Perceptible, Prof. 

 H. N. Russell, 293 ; The Temperature of Space, Prof. 

 Fabry, 394 ; Anomalous Dispersion, Dr. A. S. King, 

 413 ; The Needs of Astronomy, 454 ; The Commence- 

 ment of the .Astronomical Day, Sir F. W. Dyson and 

 Prof. H. H. Turner, 512 ; The History of Orbit Deduc- 

 tion, Prof. A. O. Leuschner, 532 



Astronomical : Day, Commencement of the, Sir F. W. 

 Dyson and Prof. H. H. Turner, 512; Masses, The 

 Configurations of, and the Figure of the Earth, J. H. 

 Jeans, 317 



Astronomy : Field, A Manual of, A. H. Holt, 523 ; The 

 Needs of, 454 



Astrophysics, Laboratory Work in. Dr. A. S. King, 152 



.AtheniBum Club, Sir W. MacGregor, Sir W. Peterson, and 

 Sir E. Rutherford elected Members of the, 51 



.Atlantis and the Permanency of the North .Atlantic Ocean 

 Bottom, C. Schuchert, 179 



Atlas, The .Advanced, of Physical and Political Geography, 

 Dr. J. G. Bartholomew, 323 



Atmosphere, Heat Balance of the, W. H. Dines, 19 ; Optical 

 Deterioration of the, Father J. G. Hagen, 51 ; Revolv- 

 ing Fluid in the. Sir Napier Shaw, 378 



Asmospheres, Abnormal, and the Means of Combating 

 them. Dr. J. S. Haldane, 354 



Atmospheric : Electrical Phenomena during Rain, Lieut. 

 C. D. Stewart, 178; Pressure at Benson during 1915, . 

 The Diurnal Variation of, E. G. Bilham, 178 ; Refrac- 

 tion in Geodetic Operations, Correction for. Dr. 

 A. C. D. Crommelin, 433 



.Atoms, Prof. J. Perrin. Translated by D. LI. Hammick, 



44 



AHrania, The Cunard Liner, 374 



Aurora : Persistent, Dr. \ . M. Slipher, 193 ; Photographs 

 of, Prof. C. Stormer ; Dr. C. Chree, 405 



Auroras : and Magnetic Storms, Lt. L. Cave, 525 ; In- 

 ferences Concerning, E. Thomson, 159 



Australia : The Flora of, .A. J. Ewart, 179 ; South, Royal 

 Society of. Transactions of the, 331 



Australian : .Antarctic Expedition, Report oh the MoUusca, 

 C. Hedley, 430 ; Mineralogy, Bibliography of. Dr. C. 

 .Anderson, 131; Water Problem, The, Dr. B. Cunning- 

 ham, 394 



.Austrian Coastlands of the .Adriatic, Glossary of Names of 

 the, 392 



.Autogenous Welding (O.xy-Acetylene), A Practical Manual 



