XXIV 



Index 



[Nature, 

 Septe^nber 29, 1921 



structive Birth Control and Racial Progress, 821 ; The 



Control of Parenthood, 88 

 St^rmer <Dr. C), Aurorae at a Height of 500 km., 663 ; The 



Aurora Botealis of May 13, 1920, 671 

 Stout (Mary), and Madeleine Agar, A Book of Gardening 



for the Sub-tropics, 232 

 Strahan (Sir Aubrey), Dr. W. Gibson, T. C. Cantrill, Dr. 



R. L. Sherlock, and H. Dewey, Iron Ores. Pre-Carbon- 



iferous and Carboniferous Bedded Ores of England and 



Wales, 261 

 Stratton (F. J. M.), The Spectrum of Nova Geminorum II., 



248 

 Street (R. O.), The Dissipation of Energy in Permanent 



Ocean Currents, etc., 158 

 Stridsberg (G.), Coloured Thinking and Thought-forms, 55 

 Stromeyer (C. E.), Solar Eclipse Results and the Principle 



of Relativity, 682 

 Strong (Prof. J."), The Aims and 'Lines of Work of the Asso- 

 ciation of University Teachers, 701 

 Stroobant (P.), The Flattening of the Spheroid of Saturn, 



319 

 Strutt (Prof. J. W.), [Lord Rayleigh], Scientific Papers. 



Vol. vi., 19H-19, 546 

 Stuart (A.), appointed Assistant Lecturer in Geology at 



the University College of Swansea, 637 

 Stubbs (A. J.), Picture-hanging Wire, 395 

 Sturtevant (Dr. A. H.), The North American Species of 



Drosophila, 743 

 Sudborough (J. J.), and Miss M. M. Mehta, The Perishing 



of Paper in Indian Libraries, 437 

 Sudeley (Lord), resolution in the House of Lords on the 



Employment of Guide Lecturers and the Sale of 



Pictorial Illustrations in Museums, etc., 52 

 Svedberg (Prof. The), The Formation of Colloids, 744 

 Swinton (A. A. Campbell), Amplifying the Optophone, 8 ; 



The Peltier Effect and Low-temperature Research, 43 

 S'ykes (Brig-Gen. Sir Percy), A History of Persia (in two 



volumes). Second edition, 804 

 Synge (E. H.), Uniform Motion in the ^ther, 746 



Talbot (W. H. Fox), Proposed Memorial to, 691 

 Tanret (G.), An Ammonium Molybdo-quinate, 702 ; The In- 

 fluence of Ammonium Molybdate on the Rotatory Power 

 " of Mannite, 607 ; The Influence of Ammonium Molybdate 



on the Rotatory Power of Some Sugars, 542 

 Taylor (Dr. G.), The Evolution and Distribution of Race, 



Culture, and Language, 435 ; Water-divining in 



Australia, 822 

 Taylor (H. F.), The Principles involved in the Preservation 



of Fish by Salt, 692 

 Taylor (W.), [obituary], 721 



Teale (E. O.), Palaeozoic Geology of Victoria. 828 

 Telford (J. C), Fabricated Ships, 596 

 Tennant (A. C.), Ocean Tides, 299 

 Terenin (A.), The Normal Orbit of the Electron in the Atom 



of Mercury, 203 

 Thayer (A. H.), [obituary article], 596 



Thayer (G. H.), with an Introductory Essay by A. H. 

 - Thayer, Concealing-coloration in the Animal Kingdom. 



New edition, 338 

 Thomas (H. H.), An Ottokaria-Hke Plant from South Africa, 



445; re-elected Fellow of Downing College, Cambridge, 



830 

 Thomas (Dr. H. H.), The Source of the Stpnes of Stone 



henge, 23 

 Thompson (Dr. F. C), appointed Professor of Metallurgy 



in Manchegtet University, 91 

 Thompson (Dr. J. M'L.), Studies in Floral Morphology. 



No. ii., 93 

 Thompson (Dr. McLean), appointed Professor of Botany 



in Liverpool University, 572 

 Thomson (Prof. E.), A Novel Magneto-optical Effect, 520, 



6ig 

 Thomson (G. P.), Anode Rays of Bervllium, 395 

 Thomson (Dr. H. H.), Tuberculosis and Public Health, 328 

 Thomson (J. Allan), The Geology of Western Samoa, 828 

 Thomson (Prof. J. A.), A Correction, 811 ; and others, edited 



by Dr. J. Marchant, The Control of Parenthood, 5 

 Thoplspn' (Sif J. J.), eleqted Honorary Professor of Natural 



Philosophy at the Royal Institution, 342 ; Elements of 

 the Mathematical Theory of Electricity and Magnetism; 

 Fifth edition, 647; The Institute of Physics, 312; The 

 Structure of the Molecule and Chemical Combination, 

 118 



Thooris (A.), Biological Study of Divers, 607 



Thorpe (Prof. J. F.), awarded the Longstaff Medal ot the 

 Chemical Society, 21 



Thorpe (Sir T. E.), Early Chemistry in Oxford, 13 ; elected 

 an Honorary Foreign Member of the Chemists' Club, 

 New York, 114; French Chemists and the War, 516; 

 Prof. L. C. Miall, 17 ; Piezo-chemistry, 450 



Thouless (R. H.), appointed Lecturer in Psychology in Man- 

 chester University, 669 ; elected a Fellow of Corpus 

 Christi College, Cambridge, 572 



Thoulet (J.), The Oceanic Circulation and the Density of 

 Sea-water, 287 



Tieri (L.), Magnetic Double Refraction in Smokes, 778 



Tilden (Sir William A.), Famous Chemists : The Men and 

 their Work, 802 



Tilley (C. E.), The Granite-gneisses of Southern Eyre Penin- 

 sula (South Australia), and their Associated Amphibo- 

 lites, 29 



Tillyard (Dr. H. J. W.), appointed Professor of Russian in 

 Birmingham University, 474 



Tillyard (Dr. R. J.), Papers on Metamorphic Insects, 

 249 ; Revision of the Family Enotheniidae (order 

 Perlaria), with Descriptions of New Genera and Species, 

 800 ; The Neuropteroid Insects of the Hot Springs of 

 New Zealand, 791 



Tompkins (Eng.-Capt. A. E.), Marine Engineering (A Text- 

 book). Fifth edition, 296 



Tomkinson (Miss M. G.), awarded a Girton Travelling 

 Fellowship, 603 



Tooth (S.), presentation of a New Plesiosaurian from the 

 Wealden of Berwick to the British Museum (Natural 

 History), 469 



Toporescu (E.), The Removal of Lime and Magnesia from 

 Solution by Precipitates of Chromium Hydroxide, 159 



Tordav (E.), The Batetela, 179 



Toy (F. C), The Photographic Efficiency of Heterogeneous 

 Light, 542 



Travers (Dr. M. W.), elected President of the Society of 

 Glass Technology, 405 ; Importance of Quantitative 

 Investigation in dealing with Technical Glass Problems, 



405 

 Trechmann (Dr. C. T.), and L. F. Spath, The Jurassic 



of New Zealand, 638 

 Trelease (Dr. S. F.), appointed Secretary of the American 



Association, 56 

 Treuthardt (A.), Some New Measurements of the Density 



of the Air at Geneva, 639 

 Tridon (A.), Psychoanalysis : Its History, Theory, and 



Practice 515 

 Trillat (A.), and R. Kaneko, Activity of Infection by the 



Air, 734 

 Troughton (E. le G.), appointed Assistant in Charge of 



Mammals and Skeletons in the Australian Museum, 



Sydney, 434 

 Turner (Dr. A. J.), Revision of Australian Lepidoptera- 



Hypsidae .Anthelidae, 640 

 Turner (Dr. D.), and D. M. R. Crombie, Behaviour of an 



Electrified Pith Ball in an Ionised Atmosphere, 381 

 Turner (Dr. E. E.), and F. H. H. Wilson, The Decomposi- 

 tion of Dimethyl Oxalate by Acetic Acid, 832 

 Turner (Miss E. L.), Some Birds from Texel, 189 

 Turner (Prof. T.), The Casting of Metals, 344 

 Twyman (F.), An Interferometer for Testing Camera Lenses, 



470. 635 



Unwin (Prof. G.), Samuel Oldknow, the First Manufacturer 



of British Muslins, 477 

 Unwin (Dr. W. C), presented with the Kelvin Gold Medal 



for Engineering, 341 



Vallot (J.), Diffuse Radiation at Mont Blanc Observatory, 

 compared with that at lower Altitudes, 542 ; Diffuse 

 Radiation of the Sky Compared with the Direct Solar 

 Radiation, 446 



