XXII 



Index 



[Nature^ 

 April 15, r93o 



Comets, C. D. Perrine, 343 ; Heliocentric Grouping of 

 Planets in December, 361 ; The Birth of the Moon, 

 Prof. VV. H. Pickering, 479 ; Minor Planets, Dr. F. 

 Cohn, 511; Lunar Studies, Prof. W. H. ■ Pickering, 

 544; The Motion of the Moon, Dr. J. K. Fothering- 

 ham, 612; Mercury as an Evening Star, 674; Is 

 Venus Cloud-covered?, J. Evershed, 675; Minor Planet 

 GM, 704 



Stars : 



A Faint Nova, Miss Mackie, 119; Stellar Clusters, Dr. 

 and Mrs. Shapley, 119; Novae, Miss Woods; Dr. 

 Shapley ; Mr. Joy ; C. P. Olivier ; Van Maanen and 

 Sanford, 160; The Sources of Stellar Energy. Prof. 

 Russell ; Prof. Eddington, 269 ; The Group of Helium 

 Stars in Orion, Dr. Bergstrand, 299 ; Two Stars with 

 Large Parallaxes, Prof. F. Schlesinger, 342 ; Bernard's 

 Proper-motion Star, K. Graff, 420 ; The Orion Nebula, 

 Prof. W. H. Pickering, 448; Distances of the Stars of 

 Type F, C. F. Lundahl, 479 ; Absolute Magnitude as 

 a Function of Colour, F. H. Scares, 479 ; Spectroscopic 

 Determination of Stellar Parallax, W. S. Adams and 

 G. Stromberg, 511 ; Open Stellar Clusters, Dr. H. 

 Shapley ; Sir F. W. Dyson, and Mr. Melotte, 576 ; 

 Stars of High Velocity, W. S. Adams and A. H. joy, 

 612 ; Relative Masses of Binary Stars, G. van 

 Biesbroeck, 643 ; Long-period Vai iables, Prof. Turner, 

 643 ; Nova in Lyra, Miss Mackie, 704 



Sun : 



The Sun-spot Curve, S. B. Nicholson, 160 ; Solar Radia- 

 tion, C. G. Abbot, 160; The Great. Solar Prominence 

 of Last May, 420 ; The Solar Eclipse of May 29, 

 1919, C. R. Davidson, 544 



Miscellaneous : 



The Future of the Transit Circle, J. E. de Vos Van 

 Steenwijk, 80 ; The Twenty-four-hour Day, 100 ; Hindu 

 Spherical Astronomy, G. R. Kaye, 119; Fall of a 

 Meteorite in America, 361 ; Wireless Time Signals, 

 380 ; Leeds Astronomical Society, vol. xxvi. of the 

 Journal, 380 ; Discussion on Relativity, Prof. Edding- 

 ton ; Dr. Jeans ; Sir Oliver Lodge ; Dr Silberstein ; 

 frof. Lindemann ; Dr. Jeffreys, 400 ; Radiation Pres- 

 sure, Megh Nad Saha, 448 ; Centenary of the Royal 

 Astronomical Society, Prof. A. Fowler, 674 ; Tides in 

 Pipes, A. A. Michelson and H. G. Gale, 705 



Astronomy : for Surveyors, The Elements of. Prof. R. W. 

 Chapman, 499; Practical, Text-book on. Prof. 6. L. 

 Hosmer, Second edition, 3 ; Spectroscopic, Prof. A. 

 Fowler, 234 ; The Adolfo Stahl Lectures in, delivered 

 in San Francisco, Cal., in 1916-17 and 1917-18, under 

 the auspices of the Astronomical Society of the Pacific, 



370 



Athenaeum Club, Sir Daniel Hall, elected a member of 

 the, 608 



Atmosphere : Free. The Characteristics of the, W. H. Dines, 

 505 ; Internal Friction in the, D. Brant, 714 ; The 

 Structure of the, when Rain is falling, Prof. V. 

 Bjerknes, 346 



Atmospheric : Air, Search for a Characteristic Equation 

 Applicable to, Ed. Fouche, 491 ; and Terrestrial Radia- 

 tion, W. H. Dines, 714; Refraction, The Influence o,' 

 small Changes of Temperature on, Sir Arthur Schuster, 

 714; Observations at GSvre by means of free Rubber 

 Balloons, F. La Porte, 715 



.\tom. The Constitution of the, and the Properties of Band 

 Spectra, Dr. H. Deslandres, 271 ; 347 



Atomic : Disintegration and Heat Energy, Sir Oliver Lodge, 

 420; Energy, Sir Oliver J. Lodge, 435; Weights of 

 the Elements, Plotting the, against their Atomic Num- 

 bers, Dr. S. Miall, 704; Weights, &c., problems of, 398 



Atoms and Molecules, Prof. F. Soddy, 230 



Aurora of October i. The. Dr. C. Chree, and others, 119 



Australia : Problems and Prospects, Sir C. G. Wade, 130 ; 

 the Flora of, Contributions to, No. 28, A. J. Ewart and 

 J. R. Tovey, 347; Tropical, Future of, G. Taylor, 648 



Australian Army Medical Corps in Egypt, the, Lt.-Col. 

 J. W. Barrett and Lt. P. E. Deane, 560; Educational 

 Institutions, Bequests to, by Sir Samuel McCaughey, 



net. 



127; Lepidoptera, Revision of, Part vi., Dr. k. 

 Turner, 20; Lepidoptera, Part vi.. Dr. A. J. Turne 

 147 ; Opilionos, Some, H. R. Hogg, 713 ; Neuroptera, 

 No. 8 : Revi.sion of the Family Ithonidae, Dr. R. J. 

 Tillyard, 147 ; Phlebotomic Diptera, new Culicidse and 

 Tabanida;, and Synonymy, F. Taylor, 555 ; Rainfall 

 and Wheat Yield, 606 ; Signposts, S. H. Ray, 643 ; 

 South, Geology, 91 ; Stratiomyidae (Diptera), with Des- 

 cription of New Species, G. F. Hill, 271 



Autochrome Plates, a Simplified Method for the Develop- 

 ment of, Lumifere and Seyewetz, 137 ; The use of, 

 instead of Hand-paintings for Clouds, M. de 

 Chardonnet, 307 



Automobile Engineers, Institution of, Sir Henry Fowler 

 elected President of the, 638 



Autotrophic Flagellate, The Building of an, \. H. Church, 



594 



Autumn Weather, the Abnormal, 417 



Aviation : during the War, Progress of the Scientific 

 Development of, L. Bairstow, 486 ; Pocket-book for 

 1919-20, The, R. B. Matthews, Seventh edition. 562 ; 

 Position and Prospects of, L. Bairstow, 246 ; Recent 

 Progress in, Sir Richard Glazebrook, 397 



Awards for Medical Discover)-, Suggested, 671 



Axolotl, Metamorphosis of, caused by Thyroid-feeding, 

 J. S. Huxley, 435 



Bacterial Cell, a Single, the Isolation of. Dr. N. Mutch, 446 

 Bacteriology outside Medicine, Diflerent Aspects of. Dr. 



A. C. Thaysen, 455 

 Bailleul, The Explosion at, S. Pickering, 5 

 Balkans, Discoveries made in the, during the War, S. 



Casson, 487 

 Bantu Languages, a Comparative Study of the Bantu 



and Semi-, Sir Harry H. Johnston, 129 

 Baphia, Afzel, A revision of the Genus, L. V. Lester- 

 Garland, 346 

 Barnard College, Bequest to, by Genl. H. W. Carpentier, 



167 ■ ' 



Barnard's Proper-motion Star, K. Graff : Prof. Kustner, 420 

 Barometric Pressure and Underground Water-level, E. G. 



Bilham, 366 ; Variations of, and of the Specific Gravity 



of Air with .Altitude, R. Soreau, 4!;9 

 Battersea Polytechnic, courses at, 43 ; Dr. R. H. Pickard 



appointed Principal of, 325 

 Beats, Unpleasant, The Upper Limit of, N. Chatterjee, 708 

 Bedford College for Women, Decision to Extend the, 306 

 Bod-lice, Destruction of, by Chloropicrin, G. Bertrand, 



Brocq-Rousseau and Dassonville, 68 

 Beginning . . . , In the. Prof. J. Ward, 325 

 Belfast Municipal Technical Institute, Major R. Stanley 



appointed Principal of the, 186 

 Belgian Royal Observatory, Dr. A. C. D. Crommelin, 676 

 Belgique, .-\nnuaire de I'Observatoire Royal de, 1920, 158 

 Belgium, Gifts for Education in, 67 

 Benzaldoxime, Oxidation of, J. Bougault and P. Robin, 20; 



The Peroxide of, P. Robin, 307 

 Beri-beri, The Genesis of Qidema in, Lt.-Col. .A. McCarri- 



son, 345 

 Biological Nature-Study, A Source Book of, E. R. Downing, 



465; Problems, 90; Science in Secondary Schools, 



Prof. S. J. Hickson, 693 ; Sciences, The Foundations 



of, .Sir E. Ray Lankester, 198 

 Biologists, Economic. Association of, General Meeting of 



the, Sir David Prain elected President, 417 

 Biology, F'rcsh-watcr, Profs. H. B. Ward and G. C. 



Whipple, 498 

 Biomctrika, Vol. xii. ; Pts. iii. and iv., 579 

 Bird-Liming in Lower Egypt, J. L. Bonhote, 444; Migra- 

 tion, Dr. M. C. Grabham, 334 

 Birds : and the Destruction of Insect Pests, Major S. Flower, 



444 ; Beneficial to Agriculture, F. W. Frohawk, 72 ; of 



South Uist, D. Guthrie, 136; The Migration of, over 



the Mediterranean Sea, C. Suffcrn, 418 

 Birkbeck College, Celebration of Founder's Day, 405 ; 



, Courses at, 87 

 Birmingham : University, C. Grant Robertson ap|X)inted 



Principal of, 425 ; C. Grant Robertson welcomed as 



