Lndex Xiil 
Nature, ] 
December 14, 1899. 
Dark Lightning Flashes, Apparent, Lord Kelvin, F.R.S., 341 ; 
Dr. William J. S. Lockyer, F.R.S., 391, 570; Prof. R. W. 
Wood, 460; Shelford Bidwell, F.R.S., 591; Ribbon and 
Dark Lightning, 423 
Darwin, Reminiscences of, Sir Joseph D. Hooker, F.R.S., 187 
Darwin (Horace), Expansion of Solids by Heat, 149 
Data, Tables and, W. W. F. Pullen, 567 
Davis (C. H.), the Total Eclipse of the Sun, May 1900, 133 
Davis (J, and W.), the Larvze Collector’s Guide and Calendar, 
244 
Davis (Prof. W. M.), the Origin of Peneplains, 16 
Davison (Dr. Charles), Spurious Earthquakes, 139; the Here- 
ford Earthquake of December 17, 1896, 194 
Dawkins (Prof. W. Boyd), on the Geology of the Channel 
Tunnel, 610; Coal Exploration in Kent, 610 } 
Dawn of Reason, the, James Weir, 100 
Dawson (Dr. G. W.), Petroleum in Canada, 159 
Dawson (Sir J. W., F.R.S.), Tides of the Gulf and River St. 
Lawrence, and Bay of Fundy, 291 
Dawson (W. Bell), the Bore at Moncton, Bay of Fundy, 161 
Day (A. L.), the Gas Thermometer at High Temperatures, 516 
Dead, the Book of the, E. A. Wallis Budge, 385 
Dearborn (Dr. G. V. N.), the Emotions of Joy, 258 
Debierne (A.), Radio-active Material from Pitchblende, 636 
eee Exploring Expedition, United States, H. M. Smith, 
37 
Deep-Sea Ophiuroidea, an Account of the, collected by the 
Royal Indian Marine Survey Ship Zzwestégator, R. Koehler, 
459 
Deep-Sea Waves, V. Cornish, 586 
Defacqz (Ed.), Tungsten Pentabromide, 95; Two Chloro- 
bromides of Tungsten, 588 
Defective Eyesight, Dr. D. B. St. John Roosa, 341 
Delafosse (M.), the Vai Language, 4or1 
Delepine (M.), Ammoniacal Silver Nitrate, 384; Metallic 
Derivatives of Acetylene, 408 ; Heat of Oxidisation of 
Tungsten, 636 
Bendy (Dr. A.), the Parietal Eye of New Zealand Tuatera, 
104 
Denison (F. Napier), the Hydro-Aérograph, 587 
Denning (W. F.), Rotation Period of Mars, 64; the Red Spot 
on Jupiter, 210; the Recent Perseid Meteoric Shower, 377 
Dentistry, the Hygiene of the Mouth, R. Denison Pedley, 172 
Derby (O. A.), Argillaceous Rocks associated with Quartz 
Veins in Diamantina (Brazil) Region, 117 
Devaux (H.), Spontaneous Asphyxia and Alcohol-production in 
Deeper Tissues of Ligneous Stems, 143 
Dewar (Prof.), the Temperature of Liquid Hydrogen, 14; the 
Solidification of Hydrogen, 456, 488 ; Solid Hydrogen, 514 
Diamond, the Parent-Rock of the South African, Prof. T. G. 
Bonney, F.R.S., 620 
Diastase, Malt, Chemical Processes involved in the Sacchari- 
fication of Starch by, Dr. A. Fernbach, 608 
Diastase and Yeast, the Combined Action on Starch Granules 
of, Dr. G. H. Morris, 608 
Diatoms, Asterionella formosa, G. C. Whipple and D. D. 
Jackson, 624 
Didier (P.), Decomposition of Silicates by Hydrogen Sulphide, 
119 
Diener (Prof. C.), the Depressions of the Northern Dolomites, 
440 
Dieppe, on a recent Boring through the Chalk and Gault near, 
A. L. Jukes-Browne, 610 
Diet and Food considered in Relation to Strength and Power 
of Endurance, Training and Athletics, Alexander Haig, 73 
Differential Coefficients, on the Calculation of, from Tables 
involving Differences with an Interpolation Formula, W. F. 
Sheppard, 390 
Differential Equation, the Partial, of the Second Order, Prof. 
A. C, Dixon, 584 
Differential Equations of Geometry, on the Fundamental, Dr. 
Irving Stringham, 584 
Diffraction Process of Colour-Photography,' the, Prof. R. W. 
Wood, 199 
Digestion, the Natural History of, A. Lockhart Gillespie, 
PRs 73 
Dignet (Léon), the Formation of Pearls in Meleagrina margar- 
ztifera, 240 
Diller (J. S.), Paleetrochis, 117 
Discant (W. L.), Mimicry, 428 
Dissociation Theory, on the Applicability of the, to the Electro- 
lysis of Aqueous Solutions containing two Electrolytes with 
a common Ion, J. G. McGregor, 86 
Distant Sounds, W. F. Sinclair, 125 
Divers (E.), Ethyl Ammonium Sulphite, 47 
Dixon (Prof. A. C.), on the Partial Differential Equation of the 
Second Order, 584 
Dixon (H. B.), Combustion of Carbon Disulphide, 70 ; Action 
of Nitric Oxide on Nitrogen Peroxide, 71; Mode of Burn- 
ing of Carbon, 71 
Dobbie (J. J.), Corydaline, vi., 118 
Doctrine of Compensation of Errors in the Infinitesimal 
Calculus, the Origin of the, Philip E, B. Jourdain, 245 
Dodge (Raymond), Psychologische Untersuchungen iiber das 
Lesen, 172 
Dog, the, its External and Internal Organisation, 435 
Donaldson (John), Death of, 575 
Double Currents in the Bosphorus and elsewhere, Investigations 
of, Vice-Admiral S. Makaroff, 261 
Dover, Meeting of the British Association at, 463, 521; W. 
H. Pendlebury, 180, 370, 420, 495 ; Inaugural Address by 
Sir Michael Foster, K.C.B., Sec.R.S., President of the 
Association, 464 
Downing (Dr.), Precession Tables, 538 
Drawing, Geometrical, E. C. Plant, 122 
Dreyer (Dr. J. L. E., F.R.S.), Giuvres Completes de Christian 
Huygens publiées par la Societé Hollandaise des Sciences, 
457 
Dublin Royal Society, 94 
Duboin (A.), Iodine in Royat Mineral Waters, 192 
Duddell (W.), Oscillograph for tracing Alternate-current Wave- 
forms, 77 
Dufét (H.), Recueil de données Numeriques publié par la 
Société francaise de Physique, Optique, 28 
Duncker (Georg), Die Methode der Variations statistik, 338 
Dunlop (James), Anatomical Diagrams for the Use of Art 
Students, 410 
Dunér (Prof. W. C.), Spectra of Stars of Class III.4, 18 
Dupare (L.), Eruptive Rocks of Cape Blanc, Algeria, 144 ; 
Recherches Géologiques et Petrographiques sur le Massif du 
Mont Blanc, 152 
Duporcq (E.), Premiers Principes de Géomeétrie Moderne, 314 
Duprez (M.), Preventive Qualities of Blood Serum of Immunised 
Heifer against Contagious Peripneumonia in Cattle, 636 
Durand (Augustin), a Lower Homologue of Citric Acid, 216 
Durand (J. P.) (de Gros), Apercus de Taxinomie Générale, 489 
Durham and Newcastle-upon-Tyne, Catalogue of the Lepi- 
doptera of Northumberland, J. E. Robson, 590 
Dust-fall in Mediterranean, G. T. Prior, 205 
Duties of Provincial Professors, the, 255, 292; Veritas, 316 
Dybowski (M.), a Gutta-percha Plant capable of Cultivation in 
Temperate Climates, 612 
Dymond (T. S.), School Laboratory Plans, 245; on the 
Chemical Effect on Agricultural Soils of the Salt Water 
Flood of November 29, 1897, on the East Coast, 609 
Dynamics: a Treatise on the Dynamics of a Particle, Edward 
John Routh, F.R.S., 74; Dynamical Theory of Nebulz, Dr. 
E. J. Wilczynski, 281 
Eakle (A. S.), Andesites from Fiji, 301 
Earl (Alfred), the Living Organisms: an Introduction to the 
Problems of Biology, 458 
Earth, Theory of the, with Proofs and Illustrations, James 
Hutton, Prof. T. G. Bonney, F.R.S., 220 
Earth, the Theory of the Physics of the, P. Rudski, 623 
Earth’s Atmosphere, on the Absence of Hydrogen and Helium 
from the, Prof. Bryan, 585 
Earth’s Crust, the Sigmoidal Curves in the, Mrs. M. M. 
(Ogilvie) Gordon, 611 
Earthquakes : Spurious Earthquakes, Dr. Charles Davison, 139; 
the Hereford Earthquake of December 17, 1896, Charles 
Davison, Prof. J.- Milne, F.R.S., 194; Relation between 
Hereford Earthquake of 1896 and Geological Structure of 
Bangor-Anglesey District, E. Greenly, 375; Earthquakes, 
Prof. C. G. Knott, 311; Prof. F. Omori on Earthquake- 
Motion, 431; Earthquake in Darjeeling District, 535; the 
Darjeeling Disaster, Prof. J. Milne, F.R.S., 545; Earth- 
quake in Ceram Island, 594 
Earthworms, Phosphorescent, Prof. W. Blaxland Benham, 591 ; 
a Note upon, Frank E. Beddard, F.R.S., 52 
