XXX 
Silver, Remarkable Result observed on the Exposure of Metallic 
Silver to Light, Colonel Waterhouse, 609 
Simmons (A. T.), Elementary Physics and Chemistry, 78 
Simon (H. T.), Action of Wehnelt Interrupters, 383 
Sinclair (W. F.), the Indian Musk-Shrew, 30; Distant Sounds, 
125; Movement of Sea-Gulls with a coming Change of 
Weather, 545 
Sirius, the System of, Herr H. J. Zwiers, 429 
Skinner (C. A.), Potential Gradient at Anode, 540 
Skull of Hatteria, the, Prof. W. Blaxland Benham, 567 
Slide Valve Simply Explained, the, W. J. Tennant, 149 
Sloane (T. O’Conor), Liquid Air and the Liquefaction of Gases, 
268 
Small-pox : Is Immunity to Vaccine produced by Small-pox, 
Charles G. Stuart-Menteath, 436; Prof. G. Sims Woodhead, 
436 
Smith (D. E.), New Plane and Solid Geometry, 517 
Smith (D. T.), the Philosophy of Memory and other Essays, 51 
Smith (Dr, Elliot), the Ca/car avzs Common to all Mammalian 
Brains, 36 
Smith (Rev. F.), the Absence of Flint Implements in Scotland, 
135 
Smith (Dr. F. W.), the Natural Mineral Waters of Harrogate, 28 
Smith (G. O.), Rocks of Mount Rainier, 182 
pee (H. M.), United States Deep-Sea Exploring Expedition, 
37 
Smith (Worthington G.), Palzolithic Implement of Hertford- 
shire Conglomerate, 390 
Smith (W. S. T.), Geology of San Clemente Island, 182 
Smithsonian Institution in 1897-8, Work of the, 34 
Sodeau (W.), the Decomposition of Chlorates, 214 
Sokotra, Results of the Scientific Expedition to, 116 
Sola (J. C.), Orbit of Shooting Stars of August 24, 1899, 588 
Solar Energy, the Maintenance of, 615 
Solid Geometry, New Plane and, W. W. Bemanand D. E. 
Smith, 517 
Solid Geometry, Text-book of Practical, E. H. de V. Atkinson, 
122 
Solid Hydrogen, Prof. James Dewar, F.R.S., 514 
Solids by Heat, Expansion of, Horace Darwin, 149 
Sollas (Prof. W. J.), the Origin of Flint, 610 ; Homotaxy and 
Contemporaneity, 610 
Solvents, on the Influence of, on the Optical Activity of Organic 
Compounds, W. J. Pope, 609 
Sommerfeld (A.), Mathematics of the Spinning Top, 319, 346, 
391 
Songs of Birds, the, 171 
Sonnenschein (A.), the New Science and Art of Arithmetic for 
the Use of Schools, 7 
Sorby (Dr., F.R.S.), New Method of Mounting Actiniz, 44 
Sounds, Distant, W. F. Sinclair, 125 
South African Diamond, the Parent Rock of the, Prof. T. G. 
Bonney, F.R.S., 620 
South Devon Atmospheric Railway, the, Sir Frederick Bram- 
well, 327-8 
South Kensington, the New Buildings at, 59 
Southern Variable Stars, R. T. A. Innes, 513 
Sowerby (G. R.), Meptuneopsts gilchristi, a New Marine Gas- 
tropod, 549 
Spas, Why People go to, Dr. Wilfrid Edgecombe, 416 
Species, Variation of, J. W. Sharpe, 102 
Spectrum Analysis: Spectra of Stars of Class IIL. 4, Prof. 
W. C. Duner, 18 ; Spectra of Red Stars (Class III. 4), Mr. 
Ellermann, Prof. G. E. Hale, 186; Spectra of Red Stars 
(Secchi’s Type IV.), Messrs. G. E. Hale and F. Eller- 
man, 429 ; Phase-Change associated with the Reflection of 
Light froma Fuchsine Film, Edwin Edser, 44; New Photo- 
graph Researches on Phosphorescent Spectra, Sir W. 
Crookes, F_R.S., 44; on the Chemical Classification of the 
Stars, Sir Norman Lockyer, K.C.B., F.R.S., 52; on the 
Distribution of the Various Chemical Groups of Stars, Sir 
Norman Lockyer, K.C.B., F.R.S., 617; 0n some Recent 
Advances in Spectrum Analysis relating to Inorganic and 
Organic Evolution, Sir Norman Lockyer, K.C.B., F.R.S., 
103; Magnetic Perturbations of the Spectral Lines, Prof. 
Thomas Preston, F.R.S., 175; Oxygen in Atmosphere of 
Fixed Stars, David Gill, F.R.S., 190; the Rede Lecture : the 
Wave Theory of Light, its Influence on Modern Physics, 292 ; 
Stellar and Nebular Spectra with Concave Grating, 302 ; 
Photographic Researches on Phosphorescent Spectra, on 
Index 
Nature. 
December 14, 1899 
Victorium, a new Element associated with Yttrium, Sir 
William Crookes, F.R.S., 3173; Spectra of Oscillating Dis- 
charges, G. A. Hemsalech, 360; on Spectrum Series, Sir 
Norman Lockyer, F.R.S., 368, 392; W. Sedgwick, 412; 
Spectrum of Wehnelt Spark, A. Voller and B. Walter, 456 ; 
New Spectroscopic Multiple Star, Prof. W. W. Campbell, 
513; Method for Varying Scale and Dispersion of Laboratory 
Spectroscope, A. de Gramont, 550; on the Spectroscopic 
Examination of Contrast Phenomena, G, J. Burch, 585; on 
the Existence of Masses smaller than the Atoms, Prof. J. J. 
Thomson, M. Broca, Prof. Riicker, Sir Norman Lockyer, 
Prof. Oliver Lodge, 586 ; Spectral Sensitiveness of Mercury 
Vapour in an Atmosphere of Hydrogen, Dr. E. P. Lewis, 587 
Spencer (George), the Extinguishment by Carbonic Acid Gas of 
Underground Fires, 375 
Spencer (L. J.), Chemical Composition of Tetrahedite, 238 
Spiders, Maternal Devotion of, Francis J. Rowbotham, 413 
Spiele der Menschen, die, Karl Groos, 363 
Spinning Top, Mathematics of the, F. Klein and A. Sommer- 
feld, 319, 346, Prof. A. G. Greenhill, F.R.S., 391 
Spitsbergen, the Glacial Phenomena of, E. J. Garwood, 239 
Sponges, Astrosclera Willeyana, J. J. Lister, 631 
Sprague (Dr. T. B.), the Eight Queens Problem, 427 
Sprankling (C. H. G.), Symmetrical Di-isopropyl-succinic Acid, 
16 
7 
Springbuck ‘‘ Trek” in Cape Colony, the, C. Schreiner, 135 
Spurious Earthquakes, Dr. Charles Davison, 139 
Squirrels, the, North of Mexico, Dr. Allen, 537 
Staffordshire, North, Investigations among the Upper Carbon- 
iferous Rocks cf, W. Gibson, 610 
Standen (Mr.), Cowries of Caput-serpentis Group, 596 
Stansfield (Dr. A.), the Solution Theory of Carburised Iron, 
40 
Geran the Action of Acids on, Dr. G. H. Morris, 608 
Starch, Chemical Processes involved in the Saccharification of, 
by Malt Diastase, Dr. A. Fernbach, 608 
Starch Granules, on the Combined Action of Diastase and 
Yeast on, Dr. G. H. Morris, 608 
Stars: Second Washington Star Catalogue, 18; Spectra of 
Stars of Class III. 4, Prof. W. C. Dunér, 18 ; Spectra of Red 
Stars (Class III. 4), Mr. Ellerman, Prof. G. E. Hale, 186 ; 
Spectra of Red Stars (Secchi’s Type IV.), Messrs. G. E. 
Hale and F. Ellerman, 429; on the Chemical Classification 
of (the Stars, Sir Norman Lockyer, K.C.B., F.R.S., 52; on 
the Distribution of the Various Chemical Groups of Stars, 
Sir Norman Lockyer, K.C.B., F.R.S., 617; New Star 
in Sagittarius, 88; Two New Variable Stars, M. Luizet, 
161; Dr. T. D. Anderson, 551; the New Algol Variable 
in Cygnus, 442, {538; Southern Variable Stars, R. 
T. A. Innes, 513; the Life of a Star, Prof. J. Perry, 
F.R.S., 247; Dr. T. J. J. See, 519 ; Photography of Nebula 
and Star Clusters, 330; Cordoba Photographs of Star 
Clusters, 487; Double Star Catalogue, R. G. Aitken, 354 > 
New Spectroscopic Multiple Star, Prof. W. W. Campbell, 
513; Stellar Parallax, Osten Bergstrand, 538; Stellar and 
Nebular Spectra with Concave Grating, 302; the Polaris 
Multiple Star, Prof. W. W. Campbell, 577 
Statistical Methods applied to Biology, 338 
Steam Navigation, Sir William White, K.C.B., LL.D., F.R.S., 
27 
Steele (B.D.), the Blue Salt of Fehling’s Solution, 71 
Steger (Dr. A.), Influence of Water on Ether Formation, 312 
Steinheil (C. A. Schultz), the Rotation of the Sun, 577 
Stellar Parallax, Osten Bergstrand, 538 
Stellar and Nebular Spectra with Concave Grating, 302 
Sterilisation of Potable Waters by Ozone, MM. Marmier and 
Abraham, 24 
Stevens (H. S.), an Elementary Course of Mathematics, 518 
Stipules, on Buds and, Right Hon. Sir John Lubbock, F.R.S. , 
14 
Bistes (Sir George Gabriel, F.R.S.), the Jubilee of, rog, 125 
Strain in Bismuth, Magnetic, Shelford Bidwell, F.R.S., Dr. 
C. G. Knott, 222 
Strassburg Observatory, 625 
Strawberry Cure for Gout, 125 ; Donald Ferguson, 150 
Stringham (Dr. Irving), on the Fundamental Differential 
Equations of Geometry, 584, 
Stromeyer (C. E.), Induced Lightning Flash, 511 ; Remark- 
able Lightning Flashes, 520 
Stroud (Prof. Henry), Remarkable Lightning Flashes, 520 
