vill 
Manual of British Birds, Howard Saunders, 241 ; Bower- 
birds, A. J. Campbell, 275 ; Sedge-warblers Seizing Butter- 
flies, Oswald H. Latter, 520; Bird Life in an Arctic Spring : 
the Diaries of Dan Meinertzhagen and R. P. Hornby, 542 
Bismuth; Magnetic Strain in, Shelford Bidwell, F.R.S., Dr. 
C. G. Knott, 222 
Bjurholm Aerolite, the, 110 
Blackford (Dr. Charles Minor), a Curious Salamander, 389 
Blake (Dr. E. M.), Ruled Surfaces Generated by Plane Move- 
ments, whose Centrodes are Congruent Conics Tangent at 
Homologous Points, 359 
Blake (H. W., F.R.S.), Death of, 229 
Blake (R. F.), Amount and Causes of Carbonic Anhydride of 
Atmosphere, 94 
Blandford (Walter F. H.), Larva from the Head of an Ante- 
lope, 150 
Blatchford (T.), Geology of Coolgardie Goldfields, 300 
Blondel (A.), Coherers, 87 
Blondlot (R.), Electromotive Force Produced in Flame by 
Magnetic Action, 215 
Blood, the Electrical Resistance of the, Dr. Dawson Turner, 
24 
Blood, Horse, Existence of a Preventive of Milk-coagulation in, 
A. Briot, 144 
Bloxam (W. B.), Hydrosulphides, Sulphides and Polysulphides 
of Potassium and Sodium, 167 
Blue Ray of Sunrise over Mont Blanc, Lord Kelvin, F.R.S., 
411 
Boas (Dr. Franz), Biological Significance of Cephalic Index, 442 
Bock (A.), the Blue Steam Jet, 540 
Boilers, Marine, L. E. Bertin, 289 
Bollemont (E. G. de), Methylic, Ethylic and Amylic Cyan- 
acetates, 264 
Bolletino della Societa Sismologica Italiana, 46, 237, 287 
Bollingen (Dr.), Milk and Pigs as a Source of Tubercular In- 
fection to Mankind, 108 
Bone (W. A.), Symmetrical Di-isopropylsuccinic Acid, 167 
Bonetti (F.), Method of Determining Position of Epicentre in 
Distant Earthquakes, 46 
Bonney (Prof. T. G., F.R.S.), Volcanoes : their Structure and 
Significance, 27 ; the Geology of Mont Blanc, 152; Theory 
of the Earth, with Proofs and Illustrations, James Hutton, 
220; the Early Mountaineers, Francis Gribble, 274; the 
Parent-rock of the South African Diamond, 620 
Bonnier (Gaston), Anatomical and Physiological Characters of 
Plants rendered Artificially Alpine, 71 
Book of the Dead, the, E. A. Wallis Budge, 385 
Books of Science, Forthcoming, 601 
Bordage (E.), Regeneration of Front Pair of Appendages in 
Leaping Orthoptera, 312 
Bordier (H.), Electrolytic Action in Neighbourhood of Crookes’ 
Tube, 216 
Bore at Moncton, Bay of Fundy, the, W. Bell Dawson, 161 
Bort (T. de), Temperature-variation of Free Air, 576 
Bosphorus and Elsewhere, Investigations of Double Currents in 
the, Vice-Admiral S. Makaroff, 261 
Botany : a Welsh Variety of Achlya Americana, A. H. Trow, 
37; Morphology of Spore-producing Members. IV. Lepto- 
sporangiate Ferns, Prof. F. Bower, F.R.S., 46; Obituary 
Notice of Charles Naudin, 58; Journal of Botany, 67, 263, 
488; Anatomical and Physiological Characters of Plants 
rendered artificially Alpine, Gaston Bonnier, 71 ; Mangroves 
Growing in Japan, Tokutaro Ito, 79; a Horn-destroying 
Fungus, Prof. H. M. Ward, F.R.S., 92; Linnean Society, 
93, 118, 190, 214; the Flora of Cheshire, the late Lord de 
Tabley, 100 ; Spontaneous Asphyxia and Alcohol production 
in deeper Tissues of Ligneous Stems, H. Devaux, 143; Les 
Plantes Utiles du Sénégal Le R. P. A. Sébire, J. M. Hillier, 
148; on Buds and Stipules, Right Hon. Sir John Lubbock, 
F.R.S., 149; the Formation of Alcohol by Plants, M. 
3erthelot, 167; Mode of Impregnation in Lilium Martagon, 
M. Guignard, 185; Catalogue of the Library of the Royal 
Botanic Gardens, Kew, 244; Hybridisation, Dr. Maxwell T. 
Masters, F.R.S., 286; the International Conference on 
Hybridisation and Cross-Breeding, Wilfred Mark Webb, 305 ; 
Iodine in Chlorophyll-containing Algz, Armand Gautier, 
336 ; ‘‘ Flora Capensis : being a Systematic Description of the 
Plants of the Cape Colony, Caffraria and Port Natal (and 
Neighbouring Territories), by Various Botanists, W. T. 
Thiselton-Dyer, F.R.S., 337; Flora of Tropical Africa, 
Index 
Nature, 
December 14, 1899 
W. T. Thiselton-Dyer, F.R.S., 337; the Trinidad Cacao- 
Fungus, G. Massee, 353; the Improvement of the Sugarcane 
by Chemical Selection upon Sir William Thiselton-Dyer’s 
Method, 375; Anatomical Structure of Vanzlla aphylla, 
Edouard Heckel, 384 ; the Forests of the Sudan, Sir William 
Garstin, gor; Les Végétaux et les Milieux Cosmiques 
(Adaptation-Evolution), J. Constantin, 409; India-Rubber 
and the India-Rubber Industry, 426 ; New Algze, -Pleurococcus 
sulphurarius, Dr. A. Galdieri, 485; New Parasitic Tea- 
plant Disease, G. Massee, 485; a Gigantic Annual, C. H. 
Baker, 485; a Cross-bred Orchid, H. Peirson, 485; the 
Constant Difference between Normal and Adventitions Buds 
of Trees, C. de Candolle, 550; Progress and Problems of 
Plant Physiology, Prof. C. R. Barnes, 563 ; Phenomena of 
Cellular Disorganisation, V. Boulet, 564; Method of pre- 
paring Algz for Observation, 597; a Gutta-percha Plant 
capable of cultivation in Temperate Climate, MM. Dybowski 
and G. Fron, 612 ; Action of Anzesthetic Vapours on Dry and 
Moist Seeds, H. Coupin, 612; Astertonella formosa, D. D. 
Jackson, 624; Production of Mannose during Germination of 
Carob Seed, E. Bourquelot and H. Heérissey, 636 
Boudouard (O.), Decomposition of Carbonic Oxide in presence 
of Metallic Oxides, 216; Decomposition of Carbonic Anhy- 
dride in presence of Carbon, 216 
Boulder Pavement, a, G. K. Gilbert, 159 
Boulet (V.), Phenomena of Cellular Disorganisation, 504 
Boulvin (J.), the Entropy Diagram and its Application, 3 
Bourlet (Dr. C.), La Bicyclette: sa Construction et sa Forme, 
77 
Bourquelot (E.), Pectins, 95 ; the Estimation of Mannose, 384 ; 
Composition of Carob Seed Albumen, 408; Production of 
Mannose during Germination of Carob Seed, 636 
Bouty (E. J.), Do Rarefied Gases possess Electrolytic Conduc- 
tivity ? 312; Di-electric Cohesion of Rarefied Gases, 336 
Bouveault (L.), Use of Tetrachlorohydroquinone for Characteri- 
sation and Separation of Fatty Acids, 264 
Bower (Prof. F. O., F.R.S.), Morphology of Spore-producing 
Members IV. Leptosporangiate Ferns, 46 
Bower-Birds, A. J. Campbell, 275 
Boyle Lecture on the Perception of Musical Tone, the, Prof. 
McKendrick, 163 
Bradford (J. R., F.R.S.), Organism of Tsetse Fly Disease, 309 
Brain, the ; the Calcar Avis common to all Mammalian Brains, 
Dr. Elliot Smith, 36 
Brain of Hermann von Helmholtz, the, 61 
Bramwell (Sir Frederick), the South Devon Atmospheric Rail- 
way, 327-8 
Branly (Edouard), Radioconductors with Metallic Spheres, 47 
Brazilian Marmosets Breeding in England, Pair of, Dora 
Whitmore, 199 
Breakell (Mr.), the Treatment of Refractory Silver Ores by 
Lixiviation, 15 
Breitenbach (P.), Viscosity of Gases, 117 
Breithaupt (G.), Optical Properties of Burnt-in Gold and 
Platinum Films, 212 
Brenol (W. A.), the Story of Ice in the Present and Past, 615 
Brewster (E. T.), Variation and Sexual Selection in Man, 4o1 
Bright (Sir Charles Tilston), the Life Story of, with which is 
Incorporated the Story of the Atlantic Cable and the First 
Telegraph to India and the Colonies, Edward Brailsford 
Bright and Charles Bright, 613 
Brinton (Dr. D. G.), Death and Obituary Notice of, 374 
Briot (A.), Existence in Horse-blood of a Preventive of Milk- 
coagulation, 144 
BRITISH ASSOCIATION: Dover Meeting of the, 463, 521; 
W. H. Pendlebury, 180, 370, 420, 495 ; Inaugural Address 
by Prof. Sir Michael Foster, K.C.B., Sec. R. S., President 
of the Association, 464; Evening Address ‘‘ La Vibration 
Nerveuse,” Prof. Charles Richet, 625 
Section A (Mathematics and Phystcs).—Opening Address by 
Prof. J. H. Poynting, F.R.S., President of the Section, 
470; Dr. Francis;Galton on ‘The Median Estimate,” 
584; Prof. Forsyth on a System of Invariants for Parallel 
Configurations in Space, 5843; Prof. Everett on the Nota- 
tion of the Calculus of Differences, 584; Prof. A. C. 
Dixon on the Partial Differential Equation of the Second 
Order, 584; Dr. Irving Stringham on the Fundamental 
Differential Equations of Geometry, 584; Report on the 
Problem of Three Bodies, Mr. E. T. Whittaker, 585 ; on 
the Spectroscopic Examination of Contrast Phenomena, 
