Nature, 

 September 29, 192 1 



Index 



liii 



G. Barlow and H. B. Keene, 574 ; The World of, Six 

 Lectures delivered before a Juvenile Auditory at the 

 Royal Institution, Christmas, 1919, Sir William 

 Bragg, 200; Transmitted Through Earth, R. G. Dur- 

 rant, 140 ; -waves, A Photographic Method of Finding 

 the Instantaneous Velocity of, at Points near the 

 bource, A. L. Foley, 94 

 Soul, The Search of the, and the Mechanism of Thought, 

 Emotion, and Conduct, Dr. B. Hollander, 2 vols., 

 644 

 Sources and Sinks, A. F. Dufton, 522 ; Dr. H. S. Allen, 622 

 South : Africa, The Flowering Plants of, Edited by Dr. 

 I. B. Pole Evans. Vol. i.. No. i, 40; The Fungus 

 Flora of. Miss Ethel Doidge ; P. van der Bijl, 469 ; 

 America, Dr. O. Nordenskjold's Expedition to. Progress 

 of, 21 ; -eastern Union of Scientific Societies, The Pro- 

 ceedings and Transactions for 1920 ; Prof. E. B. Poulton 

 President for 1921-22, 214; Annual Congress of the, 

 537 > -west Monsoon, The Origin of the, Dr. G. C. 

 Simpson, 154 



Southern California Floods of January, 1916, H. D. 

 McGlashan and F. C. Ebert, 406 



Space : and Ultimate Reality, Relativity, L. C. W. Bona- 

 cina, 171 ; in Physics, The Concept of. Dr. H. Jeffreys, 

 267; or " ^ther," Prof. A. S. Eddington, 201; Dr. 

 Norman R. Campbell ; L. C. W. Bonacina, 234 ; The 

 Physical Continuity of, L. C. W. Bonacina, 300 ; 

 Commdr. J. G. McHardy, 360 ; The Physical Status of. 

 Dr. H. Jeffreys, 394; L. C. W. Bonacina, 459; Time 

 and. The Absolute Relations of, Dr. A. A. Robb, 422 



Spanish Association, Don J. R. Carracido elected President 

 of the, 244 



Spark Lines, The Conditions of the Emission of the, by 

 the Electric Arc, A. de Gramont and G. A. Hemsalech, 

 799 ; Spectra of Gold and Platinum in the Extreme 

 Ultra-violet, The, L. and E. Bloch, 350 ; of Iron and 

 Cobalt in the Extreme Ultra-violet, The, L. and E. 

 Bloch, 287; Some, in the Extreme Ultra-violet, L. and 

 E. Bloch, 253 



Specific Heats : of Air and of Carbon Dioxide, Ratio of 

 the, Prof. J. R. Partington, 541 ; of Substances at Low 

 Temperatures, Variation of the. Prof. G. Bruhat, 280 ; 

 The Connection of the, with the Equation of State of a 

 Gas, A. G. Webster, 94 



Spectral : Lines, the Deviation of. Relativity and. Prof. 

 H. J. Priestley, 43 ; The Displacement of, by a Gravita- 

 tional Field, Prof. H. J. Priestley, 585; Series, Doublets 

 in, D. Rogestvensky, 203 



Spectrophotometry in the Visible and Ultra-violet Spectrum, 

 Prof. T. R. Merton, 125 



Spectroscope with Catoptric Grating, A, Prof. A. Lo Surdo, 

 478 



Spectroscopic Parallaxes, 1646, W. S. Adams, and others, 

 281 



Spectrum Lines, The Effect of a Magnetic Fifeld on the 

 Intensity of, ii., H. P. Waran, 510; Researches on the 

 Motions in the Line of Sight, etc.. Dr. W. S. Adams, 

 539 



Sphaeria, Variation in, W. E. Alkins, M. Cook, and J. 

 Harwood, 30 



Spiders, Some, without Pulmonary Sacs, L. Fage, 159 



Spiral Movements in Rocks during Elevation or Depression, 

 Prof. C. Lapworth's Views with Regard to, Dr. T. S. 

 Wilson, 93 ; Nebulae, Formation of, Speculations on the, 

 A. V^ronnet, 438; The Constitution and Formation of 

 the, A. V^ronnet, 350 



Spiritualism and the New Psychology : An Explanation of 

 Spiritualist Phenomena and Beliefs in Terms of Modern 

 Knowledge, Dr. M. Culpin, 164 



Spitsbergen, The Impending Biological Expedition to, 214 



Sponges, Hexactinellid, Prof. A. Dendy, 413 



Sportsman-naturalist : A, 259 ; in India, The Diary of a, 

 E. P. Stebbing, 615 



Squirrels, The Feeding Habits of, R. Standen, 822 



Stalagmite containing Impressions of Moth's Wings, C. 

 Carus-Wilson, 21 



Stanford, Leland, University of California, Impending 

 Establishment in, of a Research Institute on the Pro- 

 duction, Distribution, and Consumption of Food, 156 



Staphylinid Beetles, The, Dr. M. Bernhauer, 413 . 



Star : and Nebula, Collision of, Prof. E. W. Brown, 471 ; 

 Clusters, Magnitudes in, XL, H. Shapley, 94; Maps, 

 Ancient, 24 



Starlight, The Total Amount of. Dr. P. J. Van Rhijn, 566 



Stars : Atmosphere of, Researches on the, H. Deslandres and 

 V. Burson, 93, 222 ; Determination of the Effective 

 Temperatures of Some, and their Colour Index, C. 

 Nordmann and Le Morvan ; Double, J. Jackson, 217; 

 Parallaxes of. The Determination of the, Grant to 

 W. B. Rimmer by the Advisory Council for Scientific 

 and Industrial Research for Research Work on, 467 ; 

 Variable, Miss Cannon ; S. Williams ; C. Hoflmeister, 

 759 ; Periodicity of. Dr. J. G. Hagen, 566 ; State 

 Awards for Medical Discovery, Sir Ronald Ross, 723 ; 

 Technology, No. i, 311 



Statistics : Elements of, Prof. A. L. Bowley. Fourth edi- 

 tion, 102 ; Official, Prof. A. L. Bowley, 549 



Statolith, Apparatus in. Studies in the Cytology of the, 

 T. L. Prankerd, 317 



Steam : and Thermodynamic Theory, Sir J. A. Ewing, 482 ; 

 of Turbines, Properties of. Prof. H. L. Callendar, 482 ; 

 Engine, A New Type of Crankless, A. G. M. Michell, 

 181 ; Nozzles, Pressure-flow Experiments on, Prof. 

 A. 'L. Mellanby and W. Kerr, 54 



Steel : Joints, Welded, The Fragility of Some, C. Fremont, 

 62 ; The Analysis of, 741 ; The Cause of Quenching 

 Cracks in, Honda, Matsushita, and Idei, 534 ; The 

 Physico-chemical Properties of. Prof. C. A. Edwards. 

 Second edition, 772 ; Works' Materials, The Chemical 

 Analysis of, F. Ibbotson, 741 

 Stella Maitland ; or. Love and the Stars, H. P. Hawkins, 



777 



Stellar : Atmospheres, The Stationary H- and K-lines of 

 Calcium in. Prof. Megh Nad Saha, 488; Evolution, Cos- 

 mogony and, J. H. Jeans, 557, 588 ; Magnitudes and 

 their Determination, H. Spencer Jones, 142, 173, 

 205 ; Parallax, Sir Frank Dyson, 527 ; Measurements of, 

 at the Dearborn Observatory, P. Fox, 382 



Stem with Horizontal Geotropism, A, H. Coupin, 159 



Stems of Various Annual Plants, The Utilisation of the, 

 C. A. Bey, 222 



Stereochemistry, Recent Advances in, Prof. B. K. Singh, 



474 

 Stereoscopic Vision, The Applicatipn of, to the Control of 



Glacial Variations, P. L. Mercanton, 159 

 Stickstoffs, Die Reaktionen des freien, Prof. W. Molden- 



hauer, 772 

 Stone-axe Factory, The, of Graig-lwyd, Penmaenmawr, 



S. H. Warren, 346 

 Stonehenge, Excavations at, Lt.-Col. W. Hawley ; The 



Source of the Blue Stones at. Dr. H. H. Thomas, 23; 



Recent Work at, 50 

 Stones and Quarries, J. Allen Howe, 423 

 Stonyhurst College Observatory Report, Rev. A. L. Cortie, 



503 



Stratigraphy, British, 355 



Streams, Relation of, to Geological Structure, W. R. 

 Browne, 832 



Students and Teachers from the Dominions Overseas and 

 from Foreign Countries in British Universities, 156 



Submarine Cable, Transmission Characteristics of the, J. R. 

 Carson and J. J. Gilbert, 540 



Subject-index to Periodicals, 1917-19 ; Section F: Educa- 

 tion and Child Welfare, 188; B.-E. Historical, Politi- 

 cal and Economic Sciences, 199 



Sudan Government, Institution of a Scientific Research Com- 

 mittee by the, 661 



Sugar-cane in Trinidad, The Froghopper-blight of, C. B. 

 Williams, 66i 



Sulphonations in the Presence of Iodine, V. Auger and 

 Mile. M. Vary, 767 



Sulphuretted Hydrogen in the Seeds of Certain Papilion- 

 aceae, the Extraction and Nature of the Substance Pro- 

 ducing, M. Mirande, 768 



Sumer and Egypt, Early Chronology of. Prof. S. Langdon, 



. 315 

 Summer : Educational Courses in England and Wales, List 



of, 380; Time, Date for the Beginning of, 21 

 Sun : and Moon, The Accelerations of the. Dr. H. Jeffreys, 

 281 ; Naked Eye Observations of the Eclipse of the. 



