VUl 



Index 



r KaturCt 

 \_ApTU 14, 1921 



David (Dr. W. T.), appointed Professor of Engineering at 

 the University College of South Wales and Monmouth- 

 shire, 424 ; Radiation in Explosions of Hydrogen and 

 Air, 362 ; The Internal Energy of Inflammable Mixtures 

 of Coal-gas and Air after Explosion, 553 

 Davies (Dr. A. .Morley), An Introduction to Palaeontologv, 



688 

 Davies (Major D.), Gift to the University of Wales, 329 

 Davies (Dr. H. Walford), Euphony and Folk Music, 516 

 Davies (R.), The System of Rami, " Sand," among the 



Arabs, 188 

 Davies (Prof. T. Ridler), [death], 119 

 Davison (Dr. C), The Exmoor Earthquake of 



September 10, 132 

 Dawson (Sir Trevor), The Future of Airships, 260 

 Dawson (Dr. W. B.), Tidal Investigations in the Beaufort 



Sea, 641 

 Day (Dr. A. L.), Optical Glass, 481 



Deeley (R. M.), The Energy of Cyclones, 345, 502, 631 

 Defant (A.), The Tides of the Irish Sea, 775 

 Dejean (P.), The Ar, Point of Steels and of Martensite, 



394 



Dekhuyson (C), The Biological Semi-permeability of the 

 External Walls of the Sipunculideae, 818 



Delage (Y.), Application of the Pitot Tube to the Deter- 

 mination of the Velocity of Ships and to the Registra- 

 tion of the Distances Traversed, 330; [death], 219; 

 [obituary article], 248 



Delauney (P.), Extraction of Glucosides from Two Indi- 

 genous Orchids, 135 



Del^pino (M.), and P. JalTeux, The Two Homologues of 

 Ethylene Sulphide, 778 



Deller (Dr. E.), appointed Academic Registrar of London 

 University, 298 



Dendy (Prof. A.), New Experiments on the Inheritance of 

 Somatogenic Modifications, 742 



T)&n& (Ch.), Waves of Shock, 330 



Denigds (G.), An Extremely Sensitive Colour Reaction for 

 Phosphates and Arsenates : its Applications, 394 ; The 

 Microchemical Reactions of Radium : its Differentiation 

 from Barium by Iodic Acid, 299 



Denning (W. F.), Establishment of a Fund for, 156; The 

 January Meteors, 578; The New Star in Cygnus, 33, 



59. 254 

 Desborough (Capt.), Industrial Alcohol, 358 



Descartes, A Memorial Tablet to, 220 



Desch (Prof. C. H.), Cement Manufacture and Testing, 3; 

 Preparation and Properties of Ductile Tungsten, 359 



Desgrez, Guillemard, and Savfes, The Purification of Air 

 Contaminated with certain Toxic Gases, 586 



Deslandres (H.), The Recognition in Stars of the Successive 

 Layers of their .'\tmosphere, etc., 166; The Work of 

 S'r Norman Lockyer, 383 



Detwiler (S. R.), The Hyperplasia of Nerve-centres Result- 

 ing from Excessive Peripheral Loading, 136 



Dickson (Prof. L.), Relations Between the Theory of Num- 

 bers and other Branches of Mathematics 196 



Digby (Prof. K. H.), Immunity in Health : The Function 

 of the Tonsils and other Subepithelial Lymphatic 

 Glands in the Bodily Economy, 177 



Dines (W. H.), The Energy of Cyclones, 375, 534 



Ditisheim (P.), Determination of the Difference of Lojigi- 

 tude between Greenwich and Paris by Chronometers 

 Carried by Aeroplane,' 67 ; Longitude by Aeroplane, 30 



Dixon (Miss A.), Gatherings of Protozoa from a Pond in 

 Didsbury, 56 



Dixon (Prof. H. H.), Contractile Vacuoles, 343, 441 ; and 

 N. G. Ball, A Determination; by Means of a Differen- 

 tial Calorimeter, of the Heat Produced During the 

 Inversion of Sucrose, 52 r 



Dixon (H. N.), New and Interesting South African Mosses, 

 28 ; The Mosses of the Wollaston Expedition to Dutch 

 New Guinea, 425 



Dixon (W. G.). re-appointed Reader in Pharmacology in 

 Cambridge University, 298 



Dobbie (Sir James J.), The Work of, 768 



Dobhs (F. W.), and H. K. Marsden, Arithmetic. Part ii., 

 722 



Dobson (G. M. B.), Instruments for the Navigation of 

 Aircraft. 504 



Dodd (A. P.). Two New Hymenoptera of the Super-family 

 Proctotrypidac from Australia, 427 



Dodgson (J. W.), and J. .\. Murray, A Foundation Course 

 in Chemistry : For Students of Agriculture and Tecb- 

 nolc^y. Second edition, 75 



Dodwell, Longitude by Wireless, 418 



Dollfus (G. F.), The Geoo^ical Probabilities of Discover- 

 ing Petroleum in France, 363 



Donkin (Sir H. Bryan), Heredity and Biological Terms, 

 7S8 



Donnan (Prof. F. G.), Scientific Methods of Design and 

 Control in Chemical Industry, 270; The Finance of 

 Research at Universities, 519 



Doolittle (Prof. E.), [obituary article], 445 



Douglas (C. K. M.), Temperature Variations in the Lowest 

 4 km., 554 ; Temperatures and Humidities in the Upper- 

 air Conditions Favourable for Thunderstorm Develop- 

 ment, etc., 159 



Douvilli} (II.), The Eocene of Peru, 682 



Dowling (J. J.), A Direct-reading Ultra-micromcter, 850; 

 .\ .Sensitive Valve Method for Measuring Capacities, 

 681 ; and D. Donnelly, The Measurement of Very 

 Short Intervals of Time by the Condenser changing 

 Method, 681 ; and J. T. Harris, An Appara us where- 

 by a Spark-gap is Rendered Conducting During One- 

 Half of Each Cycle, 681 



Doxford (A. E.), The Educational Functions of the North- 

 East Coast Institution of Engineers and Shipbuilders, 



3S6 



Doyon (M.), Participation of the Cellular Nuclei in the 

 Phenomena of Secretion, 682 ; The Mechanism of the 

 .\ction of Morphine on the Coagulability of the Blood, 

 618 



Dreyer (Prof. G.), in Collaboration with G. F. Hanson. 

 The -Assessment of Physical Fitness : By Correlat on of 

 Vital Capacity and Certain Measurements of the Body, 



27s 

 Dreyer (Dr. J. L. E.), The Tercentenary of Jean Picard, 



Dryden (H. L.), Experiments on Air Pressure in a Wind- 

 tunnel, 513 



Dubois (Prof. E.), De Proto-.\ustralische fossiele Mensch 

 van Wadjak (Java), 603 



Dubois (R.), Maternal .\ffcction in the Electric Skate (Tor- 

 pedo mormorolae), 747 



Dubrisay (R.), .Application of a New Method of Phys'co- 

 chemical V'olumetry, 330 



Duckham (Sir Arthur), Coal as a Future Source of Oil- 

 fuel Supply, 709 



Duckworth (Dr. W. L. H.), appointed Reader in Anatomy 

 in Cambridge University, 744 



Duclaux (Prof. E.), Translated by E. F. Smith and F. 

 Hedges, Pasteur : The History of a Mind, 303 



Duclaux (J.), and P. Jeantet, A Spectrograph for Ultra- 

 violet Vi'ork, 545 



Duddell (W.), Proposed Memorial to the late, 317 



Dudgeon (G. C), The Possible and Available Water Sup- 

 ply of Egypt, 263 



Duerden (Prof. J. E.), The Pineal Eye of the Ostrich, 487 



Dufiield (Prof. W. G.), The Investigation of Gravity at 

 Sea, 732 



Dufour (A.), The Cathodic Oscillograph, 840 



Dufraisse (C.), The Ethylene Isomerism of the (,)-Bromo- 

 styrolenes. 746; The So-called Dibcnzoylmethane of J. 

 Wislicenus, 551; ; and J. C. Bongrand, The Measure- 

 ment of the Tear-producing Power of Irritating Sub- 

 stances by the mithode du seuil, 395 



Dumanois (M.), The Determination of a Criterion of 

 General Fatigue in Internal-combustion Motors, 746 



Dumbleton (Lieut. J. E.), Principles and Practice of Aerial 

 Navigation, 371 



Dunstan (Dr. A. E.), Petroleum Refining, 123 



Durand (J.), The Action of the Alkaline Metals on the 

 Ether Oxides, 746 



Durell (C. V.), and G. W. Palmer, Elementary Algebra. 

 Part i., 722 



Durham (Miss M. E.), Ritual Nudity in North Albania, 



543 ,^...,. 



Durrant (R. G.), The Mechanics of Solidity, 440 



Dymes (T. A.), Seeding and Germination of Ruscus 

 aculeatus, Linn., in the South-eastern Quarter of Eng- 

 land, 849 



