Nature, 1 

 April 15, igaoj 



Index 



xli 



Sodium : Nitrite, Some Properties of, C. Matignon and 

 Mile. G. Marchal, 683 ; The Reversible Oxidation of, 

 C. Matignon and E. Monnet, 683 ; Stearate and Sodium 

 Oleate, The Distillation of, Pictet and Potok, 360 



Soil at Night, Cooling of the, Capt. T. B." Franklin, 450, 



458 



Solar: Eclipse of November 22, 1919, Observation of the, 

 I. Tarazona, 491 ; Eclipse of May 29, Radiotelegraphy 

 during the, 323 ; Observations of the, made at Principe, 

 Prof. A. S. Eddington, 454; The, C. R. Davidson, 544; 

 Prominence, The Great, of last May, 420 ; Protuber- 

 ances, 1880-1918, Heliographic Latitudes of the, A. 

 Ricc6, 187 ; Radiation, C. G. .'Vbbot, 160 ; at the 

 Altitude of the Mont Blanc Observatory, The Oxogenic 

 Power of the, R. Bayeux, 407 



Solution, Volume Changes in the Process of, G. ]. Burrows, 



147 

 Sound : Perception, Theories of, 591 ; -ranging, Prof. \V. L. 



Bragg, 187; 278 



South : "he Story of Shackleton's Last Expedition, 1914-17. 

 Sir Ernest Shackleton, 6<>2 ; Africa, Fishery Investiga- 

 tions in, Report on, prof. J. D. F. Gilchrist, 615; 

 The Natural History of, Mamm.ils, In four volumes. 

 F. W. Fitzsimons, 469 ; The Pre-history of, Sir H. H. 

 Johnston, 315; African Botanical Survey, Dr. J. B. 

 Pole-Evans to act as Director of the, 607 ; Mygalo- 

 niorph Spiders, J. Hewitt, 64 ; Termites, The Wing 

 Venation and Respiratory System of Certain, C. Fuller, 

 78, 639 



Southampton University College, Prof. T. Loveday ap- 

 pointed Principal of, 585 



South-Eastern Agricultural College, Wye, Rev. S. G. 

 Brade-Birks appointed Lecturer in Zoology at the, 167 



Sparrowhawk, Nesting Habits of the, J. H. Owen, 178 



S|»ctral Lines, Displacement of, R. W. Lawson, 565 



Spectrophotometry, A New Method of, in the Visible and 

 Ultra-violet and the Absorption o; Light by Silver 

 Bromide, R. E. Slade and F. C. Toy, 713 



Spectroscopic Astronomy, Prof. A. Fowler, 234 



Spermatozoa, The Relation of, to certain Electrolytes, (ii.), 

 J. Gray, 427 



Spiders, " Gynandry " among, Rev. J. E. Hull, 81 



Spiral Nebula;, The, C. L. Charlier, 68 



Spitsbergen : An .Account of Exploration, Hunting, the 

 Mineral Riches and Future Potentialities of an Arctic 

 Archipelago, Dr. R. N. Rudmose Brown, 635 ; The 

 Coal Export Trade from, Dr. Rudmose Brown, 514; 

 The Development of, 635 



Squid, The, as Food, 446 



St. Andrews Institute for Clinical Research, Prof. P. T. 

 Herring, 615 



Stahl, Adolfo, Lectures in Astronomy, The, 370 



Standardisation, International, 12 



Stannic Chloride, Action of, on Dimethyl Sulphate, Ch. 

 Boulin and L. J. Simon, 271 



Stanton Drew Stones, The, E. Sibree, 445 



Stark Effect, the Electrical Resolution of the, 65 



Star, Formation of a, Time and Temperature of, A. 

 V(5ronnet, 367 



Stars : Binary, Relative Masses of, G. van Bicsbroeck, 643 ; 

 Night by Night : The, Being the Journal of a Star 

 Gazer, J. H. Elgie, 467 ; of High Velocity, W. S. 

 Adams and A. H. Joy, 612 ; of Type F, Distances of 

 the, C. F. Lundahl, 479 ; Possessing a Total Annual 

 Proper Motion of mote than 0.5", E. Cosserat, 68; 

 Two, with large Parallaxes, Prof. F. Schlesinger, 342 



State Geological Survey, The Organisation and Functions 

 of a, P. G. Morgan, 517 



Statesman's Year-Book, The, 1919, Edited by Sir John 

 Scott Keltic and Dr. M. Epstein, 152 



Statistics ; Imperial, The Organisation of, G. H. Knibbs, 

 551 ; Public, the Collection and Presentation of, a 

 Petition Urging the Appointment of a Royal Com- 

 mission or Select Committee on the _Methods of, 416 



Steam: -boiler Plants, the Running of, D. Brownlee, 611; 

 Boiler"; and Economisers, C. E. Stromever, 675 



Steel : A New Alloy Tool-, Prof. J. O. Arnold, 416; High- 

 class, Reported Discovery in the Manufacture of, 702 ; 

 Rails, A Cause of Rupture of, and a Means of Sup- 

 pressing it, G. Charpy and J. Durand, 271 ; The Solu- 



tion Theory of, and the Influence of Changes in 

 Carbide Concentration on the Electrical Resistivity, 

 Prof. E. D. Campbell, 523 



Steels at High Temperatures, The Viscosity of, P. Cheve- 

 nard, 326 



Stellar: Clusters, Dr. and Mrs. Shapley, 119; Open, Dr. 

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

 Energy, The Sources of. Prof. Russell ; Prof. Edding- 

 ton, 269 ; Parallax, Spectroscopic Determination of, 

 W. S. Adams and G. Stromberg, 511 



Stereolepis gigas. The Growth of the Young of, 703 



Stomatopoda at Buitenzorg, Dr. A. L. J. Sunier, 446 



Stone-axe Factory, A, at Graig-lwyd, Penmaenmawr, S. H. 

 Warren, 346 



Straight Path, The, Dr. A. A. Robb, 599 



Straits Settlement Gold Medal : The, Awarded to Prof. 

 R. T. Leiper, 540; the Award of the, to Dr. R. T. 

 Leiper, 572 



Strains, Internal Longitudinal, The Influence of various 

 Factors on the Creation of, during the Rapid Cooling 

 of .Steel Cylinders, M. Portevin, 407 



Streatfeild Memorial Lecture : The, to be Delivered by 

 Prof. T. H. Morgan, 78; Prof. G. T. Morgan, 147' 



Strasbourg : The University of. Mathematics at, H. B. 

 Heywood, 74 ; Inauguration of the, 345 ; Re-inaugura- 

 tion of the, 365 



Stratosphere, Winds and Temperature-Gradients in the, 

 G. M. B. Dobson, 458 



Strawberry-growing, Prof. S. W. Fletcher, 592 



Students, Suggested Exchange of, between Denmark and 

 Great Britain, Dr. V. Naser, 522 



Submarine Mining, Comdr. Gwynne, 487 



Submarines and Sea Power, C. Domville-Fife, 433 



Sucrose, A Cryoscopic Method for the Estimation of, 

 Prof. H. H. Di.xon and T. G. Mason, 554 



.Sudan Irrigation Works, The. Dr. B. Cunningham, 120 



Suess's "Sal" and " Sima " Magmas, Dr. Holtedahl, 

 c-74 



Sugar: Beet in .America, The, Prof. 1. S. Harris, 592; 

 Seed, Prof. T. D. A. Cockerell, 661 ; Canes, some 

 Indian, and their Origin, Dr. C. A. Barber, 14; from 

 Formaldehyde and its Polymers, The Synthesis of, 

 Its Quantitative Relations, and its Exothermic Charac- 

 ter, A. J. Ewart, 555 ; Group, Scientific Study of the, 

 526; Industry, .Appointment by the Government of India 

 of a Committee on the, 444 ; Manufacture, the Nitrogen 

 Balance in, E. Snillard, 651 



Sulphide of .Silver and of Bismuth, Change in the Electrical 

 Resistance of the, W. W. Coblentz and H. Kahler, 478 



Sulphur. The Viscosity of, C. C. Farr and D. B. Macleod, 

 712 



Sulphuric Acid, Making, by the "Grillo" Plant, R. Curtis, 



341 



Summer Time, 63 ; Impending for the Present Year, 701 



Sun : Dance of the Teton Sioux, The, F. Densmore, 437 ; 

 Observations of the, made at the Lyons Observatory, 

 J. Guillaume. 491 ; Power from the, A. A. Campbell 

 Swinton, 392; A. S'. E. Ackermann, 500; A. A. Camp- 

 bell Swinton, 532 ; Spot Curve, The, S. B. Nicholson, 

 160; Temperature in the, A. Mallock, 113 



Surface-tension, C. T. Whitmell, 278 



Surgery of Deformities, 493 



Surgical Tradition, The, Sir John Tweedy, 418 



Swanley Horticultural College, Miss F. M. G. Mickle- 

 thwait appointed Principal of the, 490 



Swansea University College, Dr. T. F. Sibly appointed 

 Principal of, 616 



Swinev Lectures, Forthcoming, bv Dr. J. D. Falconer, 

 178' 



Sydney University : Bequest to, by Sir Samuel McCaughey, 

 107 ; Government Grant to, 616 



Symons : Memorial Gold Medal of the Royal Meteor- 

 ological Society, The, awarded to Prof. H. H. Hilde- 

 brandsson, 340; Meteorological Magazine, Sept., 99 



Synapsis, Studies of a, I. ; Oogenesis in the Hymenoptera, 

 L. T. Hogben, 649 : L. T. Hogben, a correction, 674 



Syria, The Geographical Unity of, E. de Marbonne, 97 



Syringa Vulgaris, Electrolytes in the Leaf-sap of, T. G. 

 Mason, 427 



SvTingothyris Winchell, etc., F. J. North, 586 



