XXXIV 



Index 



Nature, 

 ^Sehteinher 26, tgiS 



Father Cortie, 492 ; A New Variable, in Auriga, A. S. 

 Williams, 394 

 Stars : Double, Dependence of the Spectral Relation of, 

 upon Distance, CD. Perrine, 480; Faint, with Large 

 Proper Motions, Furuhjelm, 492 ; New Double, R. G. 

 Aitken, 174 ; the Spectral Conditions of the. Hypothesis 

 to account for, C. D. Perrine, 480 ; Variable, M. Luizet, 



SI I 

 Statistical Methods applied to Practical Problems, Sir G. T. 



Walker, 214 

 Steel : Damascene, Col. N. T. Belajew, 308 ; Hardening 



by Air-blast, 251; Hypoeutectoid, E. Atkinson, 198; 



Mechanical Properties of, Influence of Forging and 



Rolling on the, G. Charpy, 400 ; Microscopic Examina- 

 tion of. Dr. H« Fay, 125 ; Non-Metallic Inclusions in, 



Importance of the, A. McCance, 334 

 Stellar : Investigations at Mount Wilson, W. S. .-Xdams, 



273 ; Parallax, Photographic , Determinations of. Dr. 



A. C. D. Crommelin, 88; System, Motion of our, Dr. 



V. M. Slipher, 72 ; Types, Interpretation of, Prof. 



C. D. Perrine, 314 

 Stonyhurst College: A Proposed War Memorial at. 519; 



Observatory, Report of, for iqi7, 414 

 Strathmore Meteorite, The, Prof. R. A. Sampson, 314 

 Street Ligliting Specifications, Standard Clauses for, 92 

 Stresses in a Revolving Disc, Method of Ascertaining the 



Distribution and Magnitudes of the, H. Haerle, 491 

 Struts and Structures, Critical Loading of, W. L. Cowley 



and H. Levy, 38 

 Stumps, The Kinematisation of. Prof. V. Putti, 289 

 Sublacustrine Glacial Erosion in Montana, Prof. W. M. 



Davis. 1 9 

 Submarine, Protection of Sea-going Vessels from Attack 



by, 433 

 Submarines, Hostile, Inventors and the Problem of Dealing 



with. H. Volta. 68 

 Sugar : Beet. The Balance of some Constituent Principles of 



the, during the Manufacture of Sugar, E. Saillard, 



220 : Content of Sorghum saccharatiim at Different 



Stages of Growth, D. Berthelot and R. Trannov, 280 ; 



Industry after the War, T. H. P. Heriot, G. Marti- 



neau, Sir~T. E. Thorpe, 344 

 Sulphuric Acid and the War, Sir T. E. Thorpe, 107 

 Summer-time in France, Italy, and Holland, 27 

 Sun : Observations of the, made at Lvons Ob.servatorv 



during the Third Quarter of 1917, J. Guillaume, lo- 



Observations of the. made at Lvons Observatorv 



during the Fourth Quarter of 1917. J. Guillaume. 60'; 



The. and the Weather, Prof. C. G. Abbot, 168 ; The 



General Magnetic Field of the. Hale, Seares, van 



Maanen, and Ellerman, 4-23 , 

 Sun's Magnetic Axis. Location of the, F. H. .Seares, A. 



van Maanen, and .F. Ellerman, 479 

 Surgery. The Development of. 182 

 Swallows of America, Food Habits of. Prof. F. E. L. 



Beal, 211 

 Swansea Technical School, Bequest to, by T. P. Sims, 357 

 Swiney Prize for iqiq. The, 329 

 SwiTchgear Standardisation. Dr. C. C. Garrard, 11 

 Switzerland. Technical Instruction in, C. Perregaux, 33 

 Sydney University, S. H. Stroud appointed Lecturer in 



Pharmacy and Chemistry in, 519 

 Symhiotes. Action of, upon the Constituents of Fats, H. 



Bierry and P. Portier. 380 

 Syme, David, Research Prize awarded to Dr. T. Griffith 



Taylor, 348 

 Symmetry : in Nature, Dr. A. E. H. Tutton, 261 : Lectures 



on the Principle of, and its Applications in all Natural 



Sciences, Prof. F. M. Jaeger, 261 



Table Bay, Reproduction of Fishes in. Dr. J. D. F. Gil- 

 christ, 400 



Tantalum, The Estimation of, in its Alloys with Iron, M. 

 Travers, 139 



Teachers, The Shortage of. for Elementary Schools. 297 



Technical : Associations, Scheme for a Joint Buildinf for. 

 209 ; Education in India, its Past and Future, E. F. 

 Tipple. 138 : Instruction in Switzerland, C. Perregaux, 

 1-i ; Research, The Development of. 206 



Teeth, Form and Function of. D. M. Shaw, in 



Telephone, A Thermic. 453 



Telescope Objectives : Approximate Methods in Obtaining 

 Constructional Data for, T. Smith, 38 ; Methods of 

 Design of, P. F. Everitt and others, 252 

 T^lharmonium, Le, J. Rodet, 164 



Temnospondyli and Stegocephalia, Morphology of the 



Vertebrae of, etc., S. Williston, 452 

 Temjiel's Comet, Dr. A. C. D. Crommelin, 134 

 Temperature : Measurement of, in Very Deep Soundings, 

 M. Verzat, 498 ; Scales, A .Chart for the Conversion 

 of. 192 

 Terrestrial : Magnetic Oscillations, Dr. C. Chree, 233 ; 

 Magnetism, Rapid Periodic V'arlations of, T. Terada, 

 233 ; The Diurnal Variation of. Miss A. van Vleuten, 

 213; U.S. Magnetic Tables and Magnetic Charts for 

 1915, D. L. Hazard, Dr. C. Chree, 143 



Tetrahedron, Formulae for, Prof. G. B. Mathews, 504 



Textile Fibres, Investigations of, W. Harrison, 38 



Therapeutic Immunisation : Theory and Practice, Dr. 

 W. M. Crofton, 64 



Therapeutics, Rational, Aids to, with U.S.A. Pharma- 

 copoeia Equivalents, Dr. R. W. Leftwich, 343 



Thermo: -couples. New Types of Platinum-iridium, 212; 

 -electric Diagrams on the P-V -plane, E. H. Hall, 480; 

 -electricity. Validity of the Equation' P = dvldT in, 

 E. H. Hall, 480 



Thermometry, Exact, Meteorology and, 14 



Third and Pburth Generation, The, E. R. Downing, 462 



Thompson, Silvanus, Memorial : Lecture, Sir E. Ruther- 

 ford, 137 ; Medal presented to Sir E. Rutherford, 138 



Thunderstorms, Summer, Conditions Precedent to the 

 Occurrence of, J. Fairgrieve, 179 



Tibotsi Highlands of the Sahara, Explorations in the, Col. 

 J. Tilho, 250 



Timber Supply, Home, Position and Prospects of the. E. P. 

 Stebbing," 386 



Time at Sea : and the Astronomical Day, Dr. A. C. D. 

 Crommelin, 146 ; The New System of, F. Jacob, 375 



Time-keeping at Sea, The New System of, Dr. A. C. D. 

 Crommelin, 307 



Tomatoes, etc.. Damage to, by Ileterodera radicicola, 

 W. P. Durz, 412 



Tornadoes of the United States, The, Prof. R. DeC. Ward, 

 395 



Toronto University : Prof. T. B. Robertson appointed Pro- 

 fessor of Bio-chemistry and Prof. J. J. R. Macleod ap- 

 pointed Professor of Physiology in, 430 ; Endowment of 

 Chairs at, 318 



Torpedoes on Merchant Ships, Effect of, S. Barnaby, 69 



Toulouse University, The Institute of Applied Electro- 

 technics and Mechanics at, 238 



Transfinite Aggregate can be Well-ordered, A Proof that 

 any. P. E. B. Jourdain, 84 



Transkei, Geology of Part of the, Du Toit and Rogers, 174 



Transmission Gears, Mechanical, Electric, and Hydraulic, 

 for Land and Marine Purposes, E. Butler, 264 ■ 



Trefriw Pyrites Deposit, Geology and Genesis of the, Dr. 

 R. L. Sherlock, 319 



Triatomic Liquids, The Saturated \^apour Pressures of, E. 

 Ari^s, 219 



Trinidad : and Tobago, Department of Agriculture for. Issue 

 of a Pamphlet on " Our Local Foods and How to Use 

 Them," 373; Rubber Cultivation in, 112 



Trinitrotoluenes, a-, /3-, and 7-, H. Ryan and \\". O'Rior- 

 dan, 45q 



Trollhattan Canal, The New, 292 



Troubles locomoteurs cons^cutifs aux Plaies de Guerre, 

 Prof. A. Broca. 421 



Tsetse-flies : and Fly-belts in Central Africa, Major C. 

 Christy, 155 ; Habits of Three Species of. Dr. J. 

 Schwetz, 3q2 ; in the Gold Coast, The Bionomics of, 

 , Dr. J. J. Simpson. 311 



Tumours : The Parasitic Hypothesis of. Dr. J. A. Murray, 

 422 ; Their Nature and Causation, Dr. W. D'Este 

 -- Emery, 422 



Tungsten : The Colorimetric Estimation of, M. Travers, 80 ; 

 the Treatment of, Alleged Infringement of a Patent for, 

 68 



Tungstenite, R. C. Wells and B. S. Butler, 174 



Turin. Royal Academy of Science of. Bequest from Senator 

 T. Vallauri for a Prize, 309 



Turkey, European, New Sources of Mineral Wealth in, 413 



