Nature, 

 June 13, 1901. 



Index 



XXXVIl 



Thompson (Prof. Silvanus P., F. R. S. ). Contributions to Photo- 

 graphic Optics, 227 ; Lummer's Photographic Optics, 395 

 Thompson-Yates Laboratories Report, the, 249 

 Thomson (Prof. J. J., F.R.S.), a Text-book of Physics, Sound, 

 26 ; Theory of Electric Conduction through thin Metallic 

 Films, 555 ; Method of Determining the Velocity of Ions, 

 573 ; Electrical Properties of Hydrogen-chlorine Mixture 

 Exposed to Light, 195 

 Thorn (A. S. ), Autotomic Curves, 7 



Thornton (J. and S. W.), Bookkeeping for Business Men, 417 

 Thoroddsen (Dr.), the Iceland Earthquakes of August and Sep- 

 tember 1896, 595 

 Thorpe (Dr. T. E.), the Progress of Chemistry, 545 

 Thought and Feeling, the Story of, F. Ryland, 325 

 Thymus Gland, the, Dr. J. Beard, 306 

 Tibet : Mount Omi and Beyond, A. J. Little, 543 

 Tiffeneau (M. ), an Isomeride of Anethol, 483 

 Tillman (S. E. ), a Text book of Important Minerals and Rocks, 



with Tables for the Determination of Minerals, 346 



Tissier (M. ), Action of Acid Chlorides and Anhydrides on 



Organo-metallic Compounds of Magnesium, 531 ; Organo- 



metallic Compounds of Magnesium, 579 



Titherley (A. W.), New Method of Preparing Diacetamide, 433 



Tobacco : Literature of Coffee and Tobacco Planting, G. H. 



Tames, 7 ; J. R. Jackson, 7 ; Le Tabac, Culture et Industrie, 



E. Bouant, 248 



Todd (Sir Charles), the Rainfall of South Australia, 64 



Tommasina (Th.), Study of Distant Storms by means of Tele- 

 phone, 147 



Topaz in Brazil, O. A. Derby, 290 



Topographic Surveying, Herbert M. Wilson, 2 



Torch, Novel Marine, 474 



Torrey (Joseph), Elementary Studies in Chemistry, 606 



Toxicology : Poisonous Secretion of lulus terrestris, C. 

 Phisalix, 171 ; Quinone, the Active Principle of Venom of 

 lulus terrestris, 5lM. Behal and Phisalix, 196 



Trabert (Dr.), Trials of Stigers' Hail-dispersing Apparatus, 36 



Trabut (M.), Manna of Olive, 364 



Traction Troubles, Electric, 83 



Traction-elasticity of Liquids, on a Proof of. Prof, G. van der 

 Mensbrugghe, 274 



Tramways : Combined Trolley and Conduit Tramway Systems, 

 A. H. Connett, 547 ; Kew Observatory and the London 

 United Electric Tramways Company, 237, 281, 499, 572 ; 

 R. T. Glazebrook, 257 



Transzendentale, die, und die Psychologische Methode, Dr. Max 



F. Scheler, 438 



Transactions of American Mathematical Society, 528 

 Trap-door Spider, Adaptation of Instinct in a, R. I. Pocock, 466 

 Traube (W.), New Syntheses of some Diureides, 167 

 Travel, Sport and, East and West, F. C. Selous. 125 

 Travers (Dr. Morris W. ), the Liquefaction of Hydrogen, 122 ; 



Argon and its Companions, 164 

 Treatment of London Sewage, the. Prof. Frank Clowes, 190 

 Tree Torn by Lightning, a, Percy E. Spielmann, 466 

 Trees Bent by Frost, Dr. H. von Schrenk, 404 

 'J'rigonometry : the Elements of Plane Trigonometry, Prof. 



W. P. Durfee, 82 ; a Short Course of Elementary Plane 



Trigonometry, Charles Pendlebury, 178 

 Trilobites, Researches on the Visual Organs of the, G. Lind- 



strom, 535 

 Tripp (W. B.), a Lunar Halo, 571 



Trowbridge (Prof. Augustus), a New Form of Coherer, 156 

 Trowbridge (J. ), Circular Magnetism and Magnetic Permeability, 



5°S 

 Troye (G. A.), Mine Surveying, 315 

 Tsvett (M.), Blue Chlorophylline, 124 

 Tuatera (New Zealand) Lizard, Early Dental Development of, 



H. S. Harrison, 547 

 Tubercle-bacillus, Thermal Death-point of, Messrs. Ru&sell and 



Hastings, 353 

 Tuberculosis, Respiratory Diagnosis of, Albert Robin and 



Maurice !^inet, 532 

 Tucker (Genevieve), Mother, Baby and Nursery, 418 

 Tucker (R.), Euclid i. 32 Corr., 58 

 "Tumbling" of Pigeons, the Origin of the. Prof. G. B. Howes, 



F.R.S , 395 

 Turchini (M.), Disruptive Discharge in Electrolytes, 628 

 Turner (F. Storrs), Knowledge, Belief and Certitude, 273 

 Turner (H. H., F.R. S.), Modern Astronomy, 488 



Turner (H. J.), Bryophila inuralis from Dawlish, 530 

 Turning, Metal, Practical Lessons in, Percival Marshall, 297 

 Turquoise, Chemical Composition of, S. L. Penfield, 169 

 Twyman (F.), the Optics of Acuteness of Sight, 157 

 Tycho Brahe : Tychoniana at Prague, Prof. Dr. F. I. Studnicka, 

 206 



Uhlen-Luth (Dr.), Method of distinguishing Human from 

 Animal Blood, 499 



Unger (Franz) und Stephan Endlicher, Briefwechsel zwischen, 

 248 



United States : the Kite Work of the United States Weather 

 Bureau, Dr. II. C. Frankenfield, 109 ; United States Geo- 

 logical Survey, 215 ; United States Naval Observatory, 383 ; 

 Progress of the Magnetic Survey of the United States, 398 ; 

 Scientific Agriculture in United States, 479 ; Forestry in 

 United States, 501 ; Naval Architecture in United States, 

 J. H. Biles, 546 



Universities: University Intelligence, 21, 49, 73, 97, 121, 145, 

 169, 193, 242, 265, 290, 314, 338, 362, 385, 410, 431, 

 458, 480, 505, 528, 553, 577, 602, 625 ; the Owens College, 

 Manchester, P. J. Hartog, 374; Science at Sheffield University 

 College, 383 



Urbain (G. and E.), the Isolation of Yttria, Ytterbium and New 

 Erbium, 339 



Ursa Majoris, New Variable Star, 70 (1901), 620 



Use of Blast-Furnace Gases in Gas Engines, the, 241 



' ' Usefulness " of Science, the, F. C. S. Schiller, 298 



Ussher (R. J.), the Birds of Ireland, loi 



Vacca (Dr. G.), Graphic Solution of the Cubics, 609 



Valagussa (F. ), Vitality of Bacteria in Milk, 404 



Vallee (C. ), Action of Acids on Calcium Carbonate in presence 



of Alcohol, 531 

 Valeur (Amand), Action of Esters of Dibasic Acids on Organo- 

 metallic Compounds, 579 

 Value of British Minerals, Output and. Prof. Le Neve Foster, 



F.R.S., 72 

 Value of Magnetic Observatories, the, Captain Ettrick W. Creak, 



R.N., F.R.S , 127 

 Variable Stars : New Variable Stars, 39, 115, 260, 525 ; R. T. A. 

 Innes, 309 ; New Variable Star in Lyra, A. Stanley Williams, 

 92 ; New Variable in Cygnus, A. Stanley Williams, 188 ; New 

 Variable Star i 1901 (Cygni), Stanley Williams, 426 ; New 

 Variable 2 1901 (Cygni), Dr. T. D. Anderson, 502 ; Visible 

 Spectrum of Nova Aquilse, Prof. W. W. Campbell, 260 ; 

 Catalogue of New Variable Stars, 452 ; Nova Persei, 420 ; 

 Sir Norman Lockyer, K.C.B., F.R.S., 441, 540 : Prof. 

 E. C. Pickering, 497 ; Prof. H. C Vogel, 502 ; C. Easton, 

 540; Cooperation in Observing Variable Stars, Prof. E. C. 

 Pickering, 477 ; Observations of Circumpolar Variable Stars, 

 502 ; Catalogue of Southern Variable Stars, Alexander W. 

 Roberts, 548 ; New Variable Star 70(1901), Ursa Majoris, 

 620 ; Variability of Eros, 383, 452, 502 ; Dr. E. von Oppolzer, 

 383 ; F. Rossard, 426 ; Ch. Andre, 426 

 Variation of Atmospheric Electricity, E. Pellew, 491 

 Variations in the Motion of the Terrestrial Pole, 354 

 Vaughan (A. ), Geology of Bad Nauheim, 66 

 Vaughan (T. W.), Lower Cretaceous Gryphrea of Texas, 215 

 Vegetable Physiology, an Introduction to, J. Reynolds Green, 



F.R.S., 345 

 Veley (V. H., F.R.S.), Physical Properties of Nitric Acid 



Solutions, 554 ; Selenium in Sulphuric Acid, 587 

 Venezuela, Earthquakes in, 10 

 Venus : Diameter of Venus, Prof. T. J. J. See, 212 

 Verrall (G. H.), Entomological Nomenclature, 315 

 Vertebrates : the Distribution of Vertebrate Animals in India, 

 Ceylon and Burma, Dr. W. T. Blanford, F.R.S., 287; 

 Text-book of Vertebrate Zoology, J. S. Kingsley, 558 ; 

 Lehrbuch der vergleichenden mikroskopischen Anatomic der 

 Wirbeltiere, Dr. Med. Albert Oppel, 126 ; the Eyes of the 

 Blind Vertebrates of North America, C. H. Eigenmann and 

 W. A. Denny, 589 

 Verworn (Max), Beitrage zur Physiologic des Centralnerven- 



system, 78 

 Vibration of Gun-barrels, C. Kranz, K. R. Koch, 279 

 Vicentini (Dr. G.), the Velocity of Vortex Rings, 209 

 Victoria, the Coal Resources of, James Stirling, 36, 90 



