Index 



Nature, 

 .April 14, 1921 



Sulphur: as a Fungicide, B. 'I. P. Barker, C. T. Giming- 

 ham, and S. P. Wiltshire, 290 ; The Mechanism of the 

 Fertilising Action of, G. Nicolas, 746 



Sun: lonisation in the, Dr. Megh Nad Saha, 816; Observa- 

 tions of the, made at the Lyons Observatory, J. 

 Guillaume, 167, 586, 746 ; The Annular Eclipse of the, 

 on April 8, J. Hargreaves, 830 



Sun's Magnetic Field, J he, Dr. F. H. Scares, 191 



Sunshine Recorder, A, (mechanical type), A. P. Wain- 

 wright, 554 



Superannuation of University Teachers, 333 



Superior Vena Cava of the Cat, The, W. F. Lanchesler 

 and A. G. Thacker, 520 



Surface : Films, Forces in. Dr. A. M. Williams, 457 ; Visi- 

 bility of the .Atmosphere, Relation of, to Suspended 

 Impurity, Dr. J. S. Owens, 641 ; -wind Directions and 

 Cloud Amounts at Metz, etc.. Tables of, Capt. D. 

 Brunt, 608 



Surfaces of the 4th Order with Infinite Discontinuous 

 Groups of Birational Transformations, i., G. Fano, 

 490 



Surgery, International Society of. Sir William Macewen 

 elected President for the Congress in 1923, 87 



Surveying, Hydrography, and Geodesy, The Need of a 

 Central Institution for Training and Research in. 

 Principal E. H. Grillfiths and Major E. O. Henrici, 

 390 



Surveyor's Art, The, 369 



Sutherland, William, A Biography, Prof. W. A. Osborne, 

 Dr. C. J. Martin, 826 



S%vanley Horticultural College, Address to the Students 

 of the. Dr. R. Wells, 745 



Swansea, University College of. Inaugural Address, Dr. 

 T. F. Silby, 391 



Sydney: Botanic Gardens, Notes from the, A. A. Hamilton, 

 135 ; University, Dr. Griffith Taylor appointed Associate 

 Professor of Geography in, 34 



Symbiotic Micro-organisms in Pieris irassicae and 

 Apantelcs glomeratiis, R. Grandiori, 35 



Symbolic : Language of Science, Sir Napier Shaw, 301 ; 

 Thinking, Disorders of. Due to Local Lesions of the 

 Brain, Dr. H. Head, and others, 197 



Synapsis, Studies on. III., L. T. Hogben, 489 



Syphilis : A New Method for the Diagnosis of, G. Odin, 

 555 ; Attempt at the Culture of the Organism of, in 

 Symbiosis with the Cellular Elements, C. Levaditi, 100 



Syracuse, Miocene Ichthj'olites from, G. d'Erasmo, 395 



Table of Lines of High Sensibility of the Elements, 

 Arranged for .Analytical Work, A. de Gramont, 586 



Tails, Human, Prof. .A. Keith, 845 



Tanganyika Colony, Dr. E. O. Teale appointed Govern- 

 ment Geologist of, 606 



Tartaric : and Malic Acids in Solution, The Rotatory Power 

 of, R. de Mallemann, 490 ; Acid, The Variation of the 

 Rotatory Power of, R. de Mallemann, 778 



Tasmania, The Fungus Flora of, L. Rodway 



Tasmanian : Aborigines, The, Dr. W. L. Crowther, 330 ; 

 Half-castes on Cape Barren Island, L. W. G. Malcolm, 



354 

 Tea-tree, .A Native, Leptospermum flavescens var. grandi- 



flortim, E. Cheel, 683 

 Teachers, a Federal Council of Associations of, in Bristol, 



etc., Proposed Establishment of, s-;2 

 Teaching, The Present Trend of Thought Respecting 



Methods of. Prof. T. P. Nuiin, 580 

 Tear-producing : Power of Irritating .Substances, The 



Measurement of the, by the melhode du seuil, C. 



Dufralssc and J. C. Bongrand, 30/; ; Substances, The 



Properties of, and the Measurement of their Activity, 



G. Bertrand, 490 

 Technical Institutions, .Association of. Forthcoming Annual 



General Meeting of the, 847 

 Telephone, Dr. A. Graham Bell's Invention of the, 447 

 Telescopes, Large, Increasing the Photographic Power of, 



H. Shapley, 167 

 Tellurium, Tel^, The Subiodide of, A. Damiens, 586 

 Tempel Comet II., Observations of, M. Michkovitch, 67; 



H. Godard, 35; M. Ebell, 91 ; 160; Dr. Kudara, 322 



Temperature : Eflect of, on some of the Prop' riies of 

 Materials, Prof. F. C. Lea, 422 ; Variations- in the 

 Lowest 4 km., C. K. M. Douglas, 554 



Temperatures and Humidities in the Upper-air, Capt. 

 C. K. M. Douglas, 159 



Tenebrio molitor. Variation in, S. A. A. Hein, 607 



Terra Sigillata. .An Introduction to the Study of, Treated 

 from a Chronological Standpoint, F. Oswald and T. D. 

 Pryce, 537 



Territory in Bird Life, H. Eliot Howard, 590 



Tertiary Artiodactyls, Two New, from Nebraska, Dr. R. S. 

 Lull, 189 



Tetanus Toxin, The Spectral Properties of the, F. VIAs, 199 



Texas, Streams of, A Gazetteer of, 450 



Textile Chemist, The. J. H. Lester, 554 



Thallium and Hvdrofluoric Acid, A Complex Combination 

 of, M. Barlot, 586 



Thermionic : Tube, The Quickness of Response of Current 

 to Voltage in a. Dr. D. Owen and R. M. Archer, 848; 

 Valve, The, and Long-distance Telephony, 511: -valve 

 Tube, Progress of Research on the. Prof. W. H. Eccles. 

 447 ; Voltmeter, A Direct Reading, H. Abraham, E. 

 Bloch, and L. Bloch, 321 



Thermodynamics for Engineers, Sir ]. A. Ewing, 72 



Thermometer Screens, the late Dr. J. Aitken, 850 



Thyroid-feeding and of Thvroparathvroidectomy, The Eflecr 

 of, Prof. P. T. Herring, 488 



Tidal : Currents on the Coasts of France, The Utilisation 

 of, M. La Porte, 618 ; Friction and the Lunar Accelera- 

 tion, G. I. Taylor; Dr. H. Jeffreys, 51$: Power, A. 

 Mallock. 620: -power Development, with special refer- 

 ence fo the Severn Estuary. 477 



Tides : and Waves, Utilisation of tlip Energy of, H. Parenty 

 and G. Vandamme, 458: in Small Seas, 77s 



Timbers: of Commerce, The, 80: of the World. A Manual 

 of the, their Characteristics and Uses, A. L. Howard, 80 



Time: Fuzes, The Behaviour of. Prof. A. V. Hill. 214. 

 281 : -intervals. Small. The Measurement of, and some 

 Applications, principallv Ballistic, L. T. E. Thompson. 

 C. N. Hickman, and N! Riffolt, 587; Series Reversible?, 

 Is the, Dr. W. R. Inge. 301 • -signals. Normal. Correc- 

 tions of, G. Bipourdan, 208, 330 : Space, and other 

 Dimensions, -An -Attempt to Explain the Real Nature of, 

 C. E. Stromcver, 394 : The Measurement of very Sliort 

 Intervals of. bv the Condenser-charging Method, J. J. 

 Dowling and D. Donnelly, 681 ; The Relativity of. Prof. 

 A. S. Eddinglon. 802 



Toads and Red-hot Charcoal. Prof. W. N. F. Woodland, 46 



Tonus and Reflexes. Prof. Wertheim-Salnmonson, 702 



Topographical : and Geological Maps, The Evolution of, 

 T. Sheppard, 00 : Surveying. Use of the Panoramic 

 Camera in, J. W. Baglcy. 122 



Torpedo t>tormorolac. Maternal .Affection in, R. Dubois, 747 



" Tour de Force." A, 137 



Toxic Root-interference in Plants, 666 



Toxin Cultures, Production of Difference Spectra of, F. 

 Vlis, 231 



Training Colleges in a National System of Education, Miss 

 Wodehurst, 580 



Travel, Letters of (1802-1913), Rudyard Kipling. 435 



Trechmann's " /3-tin," Identity of, with Stannous Sulphide. 

 'L. ]. Spencer, 848 



Tresco Abbey Gardens, Scilly Isles, Dr. A. W. Hill, 28 



Tribal Customs influenced by Natural Conditions and En- 

 vironment, D. I. Bushnell, Jr., 2.^0 



Triorie : Oscillator, .A Metho<l of Demonstrating the Retro- 

 active Property of a. E. V. .Appleton, 848 ; Vacuum 

 Tubes, A Method of Testing. E. V. .Aopleton, i;2o 



Tropical : Agricultural College in the West Indies, The 

 Proposed, 478: Disease and .Administration. 236: 

 Disease : War against, being Seven Sanitary Sermons 

 addressed to all interested in Tropical Hygiene and 

 Administration. Dr. -A. Balfour, 236: Diseases Bulletin, 

 Sanitation Number, 544 ; Medicine, The London School 

 of, 741 



Tuberculosis : International Union against. Conference of 

 the, 384 ; Protecting Animals against, by means of a 

 Vaccine, Drs. Calmette and Guerin, 671 ; Treatment, 

 The Spahlingcr, Prof. D'Arsonval. 838 



Tulostoma, Persoon, The Genus, in South Africa, P. .A. 

 van der BijI, 36 



