Natur 

 February n 



Index 



Sex : Change in Mollusca, Prof. J. Bronte Gatenby, 544 ; 



Economics, Mrs. B. Wootton, 533 

 Shakespeare, The Stagery of, R. C. Rhodes, 36 

 Shear, Constants of a. The Graphical Construction of the. 



Prof. H. Hilton, 100 

 Sheep, Poisoning of, by Solatium cinereum, S. Dodd, 592 

 Sheffield : Scientific School, Yale University, Retirement 

 of Dr. R. H. Chittenden as Director; succeeded 

 by Dr. C. H. Warren, 60 ; University, Conferment 

 of Honorary Degrees, 60 ; Prof. A. H. Leahy ap- 

 pointed Emeritus Professor of Mathematics, R. Piatt 

 appointed Demonstrator in Pathology and Bacteri- 

 ology, 562 ; R. Stoneley appointed Curator of the 

 Observatory, 684 

 Shipping Casualties and Loss of Life at Sea, Statistics of, 



J. W. Verdier, 51 

 Sidereal System, The Arrangement and Motion of the, 



Prof. Kapteyn, 163 

 Sierra Leone, The Geology of, F. Dixey, 757 

 Silicates and the Silicic Acids, The Magnetic Analysis of, 



P. Pascal, 758 

 Silicosis of the Lungs, Experimental, A. Mavrogordato, 366 

 Silk, Acetate, Colouring Matters for Dyeing, Prof. A. G. 



Green, 743 

 Silver : Bromide-Gelatin Plates, The Desensitising of, 

 Dr. T. Slater Price, 849 ; Ores, Dr. H. B. Cronshaw, 

 477 '• -plated Work, The Cause of Red Stains on, 

 A. Jefferson, 531 

 Silviculture, The Practice of, with Particular Reference 

 to its Application in the United States, Prof. R. C. 

 Hawley, 407 

 Sinai, Northern, Topography and Geology of, Part 6, 



F. W. Moon and H. Sadek, 175 

 Singing Flame, The Theory of the, E.G. Richardson, 829 

 Sinus, The Orbit of, C. P. Howard, 461 

 Sison Antmi, Linn., The Identification of, T. A. Sprague, 27 

 Size, The Inheritance of, 463 



Skjellerup's Comet, Mr. Davidson, S9 ; G. Merton, 160 ; 

 19226, Dr. W. H. Steavenson, 20 ; Ephemeris of, 

 53 ; 1922^, Observations of the, A. Schaumasse, 295 

 Smallpox and Vaccination, 725 



Smell : in Birds,_ Sense of, C. B. Williams, 149 ; Prof. A. 

 Meek, 279;' Dr. B. S. Neuhausen, 677; Lt.-Col. 

 W. E. M'Kechnie, 784 ; The Organs and Sense of, 

 and of Odorous Substances, Bibliography of, J. H. 

 Kenneth, 427 

 Smithsonian Institution, Exploration and Field-work of 



the, 1921, 677 

 Smoke : Abatement Bill, The New, Prof. J. B. Cohen, 

 269 ; of Cities, The, Prof. A. E. Boycott, 413 ; Prof. 

 J. B. Cohen, 414 

 Smokeless : City, The, E. D. Simon and Marion Fitzgerald, 

 269 ; Methods in Glasgow Housing Schemes, W. B. 

 Smith, 232 

 Snowdonia, The Lavas of, H. Williams, 888 

 Snowy Wastes, Amid, Wild Life on the Spitsbergen 



Archipelago, S. Gordon, 597 

 Soaps and Proteins, Their Colloid Chemistry in Theory 



and Practice, Prof. M. H. Fischer and others, 70 

 Social : Beetles in British Guiana, A Study of some, and 

 of their Relations to the Ant-Plant Tachigalia, Prof. 

 W. M. Wheeler, 95 ; Sciences, Correlation of the, 

 J. S. Marvin and others, 682 

 Sodammonium : The Action of, on Hexamethylene-tetra- 

 mine, etc., M. Picon, 686 ; with Hydrocarbons, The 

 Reactions furnished by, P. Lebeau and M. Picon, 299 

 Soil : -acidity. Experiments on the Theory of, Prof. J. N. 

 Mukherjee, 732 ; Arable, The Presence of Cobalt and 

 Nickel in, G. Bertrand and Mokragnatz, 235; The 

 Bacterial and Protozoan Population of the, D. W. 

 Cutler, L. M. Crump, and H. Sandon, 26 ; The Living, 

 206 

 Solar: Atmospheric Changes, Dr. W. J. S. Lockyer ; 

 A. M. Newbegin : C. P. Butler, 20 ; Eclipse, The 

 Total, of September 21, Dr. A. C. D. Crommelin, 389, 

 457 ; Radiation and its Changes, Dr. C. G. Abbot, 

 F. E. Fowle, and L. B. Aldrich, 608 ; at Helwan 

 Observatory, 790 ; Observations of, 1915-1921, H. 

 Knox-Shaw, 790 ; Rotation, The Law of, Dr. Hahn, 

 4-8 

 Solenoids, Skin Effect in, G. Breit, 668 



Solides en milieu liquide. La Separation industrielle des. 



Prof. L. Fabre, 872 

 Solifluxion, The Role of the Phenomena of, in thi 



of the Region of Saulieu (Morvan), Mile. F. Brepson 

 686 

 Solution, The Problem of, 470 

 Sonometer, An Optical, Adam Hilger, Ltd., 464 

 Sophocles, The Statue of, in the Lateran Museum, T. 



Reinach, 494 

 Sound : Absolute Measurements of, Prof. A. G. Webster, 

 42 ; Amplifier, A New, L. Gaumont, 863 ; An 

 Elementary Text-book for Schools and Colleges, Dr. 

 J. W. Capstick. Second edition, 510 ; Standard 

 Source of, The Production of a, Capt. E. T. Paris, 378 

 South : Africa, Parasitology in. Dr. A. Porter ; Prof. 

 H. B. Fantham, 90 ; Problems of Race and Nation- 

 ality in, Dr. J. E. Duerden, 21 ; Some Protozoa found 

 in Soils in, Prof. H. B. Fantham, S31 ; The Union 

 of, Department of Mines and Industries : The Geology 

 of the Country around Heidelberg : Geological Map 

 of the Country around Heidelberg, Dr. A. W. Rogers, 

 662 ; African Geology, A Bibliography of, to the 

 End of 1920, A. L. Hall, 677 ; Larval Trematodes 

 and the Intermediary Hosts, F. G. Cawston, 832 ; 

 America, The Early Metal Ages in, H. Balfour, 141 ; 

 Australia, Ecology of, 365 ; Iron Ore in, R. L. Jack, 

 129 ; Plant Habits and Habitats in the Arid Portions 

 of, W. A. Cannon, 365 ; -Eastern Agricultural College, 

 Wye, R. M. Wilson appointed Principal of the, 134 ; 

 Kensington, Science and Education at, T. LI. Humber- 

 stone, 79 ; Wales and Monmouthshire, University 

 College of, Dr. A. J. S. Pippard appointed Professor 

 of Engineering at, 562 ; -west of England, University 

 College of the, First Meeting of the Court of Governors 

 of the, 684 

 Southern Sudan, Secret Societies in the, 21 

 Space : Division of, by Congruent Triangles and Tetra- 

 hedra, D. M. Y. Sommerville, S62 ; -time Geodesies, 

 Prof. H. T. H. Piaggio, 699 ; Dr. A. A. Robb, 809 

 Spain and Ireland, The Prehistoric Relations between, 



Dr. W. E. Scott, 228 

 Spark Spectra in Water, L. and E. Bloch, 27 

 Specialisation in Universities, 65 



Spectra : A Treatise on the Analysis of, based on an Essay 

 to which the Adams Prize was awarded in 1921, Prof. 

 W. M. Hicks, 690 ; on the Quantum-orbit Theory, 

 Prof. W. M. Hicks, 292 ; Line, Report on Series in 

 (The Physical Society of London), Prof. A. Fowler, 

 690 ; Selection in, An Exception to the Principle of, 

 S. Datta, 39 ; The Study of, 690 

 Spectrometer : A Direct-reading, Bellingham and Stanley, 



Ltd., 129 ; A Chemical, Adam Hilger, Ltd., 191 

 Spectro-polarimeter, A New, Bellingham and Stanley, 



Ltd., 526 

 Spectroscopic : Parallaxes for Type A, Adams and Joy ; 

 J. Evershed, 584 ; Parallaxes of B Stars, D. L. 

 Edwards, 886 ; Studies of Stellar Velocities, Dr. 

 W. J. S. Lockyer, 95 

 Spectrum : Lines of Neutral Helium derived Theoretically, 

 Some, Dr. L. Silberstein, 247, 248; Prof. W. M. 

 Hicks, 309 ; Unsymmetrical, Errors arising in the 

 Measurement of, Prof. T. R. Merton and D. X. 

 Harrison, 62 ; of Carbon Monoxide, The Mass of the 

 Particles which give the, M. Duffieux, 26S ; of the 

 Night Sky, Lord Rayleigh, 769 

 Speed Reckoner, Land and Sea, Capt. W. N. McClean, 308 

 Sphere : -gap Voltmeter, The, Dr. E. A. Owen, 615 ; 



Motion of a, in a Rotating Liquid, G. I. Taylor, 62 

 Spirula, Live Specimens of, Dr. Johs. Schmidt, 788 

 Spitsbergen : and its Wild Life, 597 ; Surveys in, R. A. 



Frazer, 786 

 " Standards, Immured," The, in the House of Commons, 



230 

 St. Andrews University : Conferment of the Honorary 

 Degree of LL.D. upon the Prince of Wales, 498 ; 

 Dr. H. S. Allen appointed Professor of Natural 

 Philosophy in, 65 } ; Rudyard Kipling elected Rector 

 of, 684 

 Stannic Acids, Magnetic Analysis of the, P. Pascal, 863 

 Star : A Bright New, 785 : A very Massive, 53 ; Dr. J. S. ' 

 Plaskett, 364 



