June 14, 1906 Trinidad, Insectivorous Water-plant from, Sir W. T. Tristram (Canon, F.R.S.), Death and Obituary Notice of, 469 Tropical Oceans, the Exploration of the Atmosphere over Tubercle Bacilli, Analysis of, G. Baudran, 504; see Tunicata, the British, an Unfinished Monograph, the late Joseph Alder and the late Albany Hancock, Dr. W. Garstang, 508 Turchini (M.), Photographic Study of the Duration of Discharge in a Crookes' Tube, 431 Turner (Hon. George), Rinderpest and other Stock Diseases, 139 Twelvetrees (W. Noble), Concrete Steel, a Treatise on the Theory and Practice of Reinforced Concrete Construction, 457 Twigg (John H.), Result of War affected by Soldier's Stature, 340, 441 Twiss (George R.), Physics, 578 Uhlenhuth (Paul), Blood-relationship of Man and Apes, 616 Ultramikroskopie, Ueber irreversible Hydrosole und, zur Erkenntnis der Kolloide, Richard Zsigmondy, Dr. J. A. Milroy, 410 Ultra-violet Rays, Absorption Spectra of, by Vapour and Liquids, Prof. E. Wiedemann, 101 Underground Waters, Relation of the Law to, D. W. Johnson, 426 Unit of Force, the Engineer's, D. J. Carnegie, 6, 54; the Reviewer, 6, 54, 174; Prof. G. H. Bryan, F.R.S., 174 United Kingdom, Summary of Progress of the Geological Survey of the, and Museum of Practical Geology for 1904, 204 United States: Hydrology in the, 183; a Large-headed Dinosaur, C. W. Gilmore, 228; Economic Geology in the United States, 306; Heinrich Ries, 437; the United States Naval Observatory, Rear-Admiral Chester, 375; Forestry in the United States, 475; Preliminary Report on the Geology and Underground Water Resources of the Central Great Plains, N. H. Darton, 593; Preliminary Report on the Geology of the Arbuckle and Wichita Mountains in Indian Territory and Oklahoma, J. A. Taff and H. Foster Bain, 593; Geology of the Perry Basin in South-eastern Maine, G. O. Smith and David White, 593 Universities: University and Educational Intelligence, 22, 46, 69, 93, 115, 140, 165, 188, 212, 238, 260, 286, 310, 332, 356, 380, 406, 428, 452, 478, 500, 524, 550, 573, 596, 621; some Characteristics of American Universities, Address at University of Wales, Aberystwyth, Principal H. R. Reichel, 44: New Museum and Laboratories of Zoology at Liverpool, 88 Unterrichts- und Vorlesungspraxis, Auslese aus meiner, Dr. H. Schubert, 100, 365 Unwin (A. H.), Future Forest Trees, 244 Upton (G. R.), Tensile Strength of Copper-tin Alloys, 62 rbain (G.), Victorium and the Ultra-violet Phosphorescence of Gadolinium, 167-8; Dysprosium, 551 Ursa Majoris, the Orbit of, N. E. Nörlund, 255 seful Plants of the Island of Guam, the, W. E. Safford, 221 sher (Francis L.), Mechanism of Carbon Assimilation in Green Plants, 525 Utilisation of Nitrogen in Air by Plants, the, T. Jamieson, 531, 607; A. D. H., 608 acca (Dr. Giovanni), Chinese Names of Colours, 365 aillant (P.), Specific Heat of Solutions of Copper Sulphate, 23 alency, a Revised Doctrine of, Prof. Arthur Smithells, 433 alentiner (Dr. W.), Variability of the Asteroid (444) Gyptis, 39; Discovery of a New Comet, 1906b, 448 aney (C.), an Account of the Deep-sea Holothurioidea collected by the Royal Indian Marine Survey Ship Investigator, 114 ariability of the Asteroid (444) Gyptis, Dr. W. Valentiner, 39 Variability of Iris, Dr. H. Clemens, 279 Variable Stars: Radial Velocities of Certain, Prof. Frost, 39; Catalogue of Variable Stars, 87; Twenty-five New Variable Stars, Miss Leavitt, 448; New Variable Stars in the Region about y Sagittæ, Prof. Wolf, 518; the Observation of Long-period Variables, Prof. Pickering, 592 Variables, Lectures on the Theory of Functions of Real, J. Pierpont, 483 Variations, the Origin of, in Animals and Plants, Prof. T. D. A. Cockerell, 197 Varigny (Henri de), la Nature et la Vie, 462 Vaughton (T. 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D., F.R.S.), Terminology in Electrophysiology, 78; on the Means of estimating the Percentage of Chloroform Vapour in Air by Means of the Densimeter, 139 Walter (Prof. B.), Light Emitted by Radium Bromide due to the Impact of the Becquerel Rays on the Particles of Nitrogen, 325 War, Result of, affected by Soldier's Stature, John H. Twigg, 340, 441; Major-General W. E. Warrand, 414 Ward (R. de C.), a more Rational Treatment of Clima- Warrand (Major-General W. E.), Result of War affected Warren (S. H.), Origin of Eolithic Flints from Natural Wartenburg (H. v.), Determination of the Molecular 400 Wassmann (E.), Comparative Studies in the Psychology of Wastage in Armies by Disease, the, Prof. R. T. Hewlett, Water, Use of Copper Sulphate in the Purification of, Water Analysis, the Sanitary Value of a, Prof. Leonhard Water Supply and Irrigation Papers, 183 Water-lilies, the, a Monograph of the Genus Nymphæa, Water-plant, Insectivorous, from Trinidad, Sir W. T. 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Gilbert), the Natural History of Selborne, 581 Whitley (E.), Effects of Alkalies and Acids, and of Alka- Wiedemann (Prof. E.), Absorption Spectra of Ultra-violet Wieland (G. R.), Large Cretaceous Turtle from Kansas, Wieler (Prof. Dr .A.), Untersuchungen üb. d. Einwirkung Wilks (Sir Samuel, Bart., F.R.S.), what causes the De- Williams (Stanley), Systematic Error in Transit Observ- Williamson (F. J.), Leather for Libraries, 53 Willis (H. G.), Elementary Modern Geometry, Supp. to Wilman (Miss M.), Transactions of the South African Papers, and Maps relating to the Geology and Mineralogy Wilson (Dr.), the Lunar Eclipse of February 8, 545 Wilson (F. R. 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