Vlll 



Index 



r ffaturt, 

 \_Afrit 15, 1920 



Druce (Dr. G. C), Occurrence in Britain as Native Plants 



of Ajuga genevensis and Centauriunt scilloides, 



Druce, var. portense (Brot.), 406 

 Druce (H. H.), Collection of Lycaenidae and Hesperidae in 



the Hill Museum, Witley, 77 

 Duchemin (R. P.), General Position of Chemical Indus. 



tries, especially in France, 268 

 Duerden (Prof. J. E.), Breeding- Experiments with 



Ostriches, 155 ; Phylogenetic Degeneration in the 



Ostrich, 6og ; Promotion of a Plumage Bill, 499 ; 



Results of the Crossing of the Northern and Southern 



Forms of African Ostrich, 81 

 Duffield (Prof. W. G.), Relativity and the Displacement 



of Fraunhofer Lines, 659 

 Dufr^noy (J.), E.xperimental Bacterial Tumours in Pines, 



168 

 Duncan (F. Martin), Insect Pests and Plant Diseases in 



the Vegetable and Fruit Garden, 467 ; Photographs 



showing the Actinic Quality of the Light from a 



Living Pyrophorus Beetle, 345 

 Dunkerley (J. S.), appointed a Ray Lankester Investigator 



at the Marine Biological Laboratory, Plymouth, 701 

 Dunlop (Sir Nathaniel), [obituary], 340 



iDykes (W. R.), nominated as Secretary of the Royal Hor- 

 ticultural Society, 377 

 Dyson (Sir F. W.), The Theory of Relativity, 631 ; and 



Mr. Melotte, Open Stellar Clusters, 576 



Easterfield (Prof. T. H.), appointed Director of the Caw- 

 thorn Research Institute, 442 



Eccles {Prof. W. H.), Special Arrangements of Three- 

 electrode Valves, 487 ; Triode Valves as Electric Am- 

 plifiers, 501 ; and others. Thermionic Valves, 454 ; and 

 J. H. Vincent, The Variations of Wave-length of the 

 Oscillations Generated by Three-electrode Thermionic 

 Tubes, etc., 617 



Eddington (Prof. A. S.), Einstein's Theory, 377; Observa- 

 tions of the Solar Eclipse at Principe, 454; Rela- 

 tivity, 400 ; The Deflection of Light during a Solar 

 Eclipse, 372 ; The Predicted Shift of the Fraunhofer 

 Lines, 598; The Sources of Stellar Energy, 269; The 

 Theory of Relativity, 385, 631 ; and others. Rela- 

 tivity, 454 



Edwards (F. W.), Descriptions and Illustrations of Di- 

 pera, 64 



Eggar (W. D.), Presentation to, on Retirement from the 

 Presidency of the Eton Collegre Scientific Society, 444 ; 

 The Teaching of English in Relation to School Science, 



Einstein (Prof.), Interview with, 541 ; Relativity, 360 



Ekblaw (K. J. T.), Farm Concrete, 495 



Elgie (J. H.), The Stars Night by " Night : Being the 

 Journal of a Star-Gazer, 467 



Elliot (W.), Modern Science and Materialism, 625 



Elliott (S.), Bequest to Edinburgh University, 425 



Ellis (C.), The Hydrogenation of Oils ; Catalysers and 

 Catalysis and the Generation of Hydrogen and O.xvgen, 

 Second edition, 494 



EStvos (Baron R. von), [obituary], 319 



Etheridge (Robert), [obituary article], 700 



Evans (D. A. E.). British Iron-ores, 565 



Evans (E. V.), The Present Position of the Chemical 

 Industry of Germany, 484 



Evans (Dr. J. W.), elected President of the National Union 

 of Scientific Workers, 297 ; Presidential Address to the 

 Geology Section of the British .Association, 38, 102 



Evershed (].), Is Venus Cloud-covered?, 675; The 'Magnetic 

 Storm of August 11-12, 1919, 436 



Ewart (A. J.), The Synthesis of Sugar from Formaldehyde 

 and its Polymers, etc., 55? ; and J. R. Tovey, Con- 

 tributions to the Flora of Australia, No. 28, 347 



Ewart (Prof. J. Cossar), A Search for Fine Wool, 153; 



Telegony, 216 

 d'Eyncourt (Sir E. H. Tennvson), The British Tanks Used 

 in the War, 486 



Fabaro (Dr. L.), Oscillations in the Luminosity of Incan- 

 descent Electric Lamps illuminated by Alternating 

 Currents, 542 



Farmer (Prof. J. B.), awarded a Royal Medal of the 

 Royal Society, 295, 363 



Farr (C. C), The Porosity of Porcelain, 517; and D. B. 

 Macleod, The Viscosity of Sulphur, 712 



Farrer (R.), The English Rock-garden, 2 vols., 664 



Fawdry (R. C), Dynamics, Part ii., 109 



Fawsitt (Prof. C. E.), The Uniformities of Nature, 586 ; 

 and C. H. Fischer, The Miscibility of Liquids, 555 



Fayet (G.), and A. Schaumasse, Ne.xt Return of the 

 Periodic Comet 1911 VII. (Schaumasse), 19; Return of 

 the Periodic Comet 191 1 VII. (Schaumasse), 347 



Fedden (R.), Golden Days from the Fishing Log of a 

 Painter in Brittany, 391 



Ferguson (E. W.), and Marguerite Henry, Tabanidas from 

 Camden Haven District, N.S.W., 587 



Ferry (E. S.), G. A. Shook, and J. R. Collins, Practical 

 Pyrometry : The Theory, Calibration, and Use of In- 

 struments for the Measurement of High Temperatures, 



47 

 Fewkes (Dr. J. W.), A Remarkable Carved Wooden 

 Object from Santo Domingo, 378 ; Field-work on the 

 Mesa Verde National Park, Colorado, 359 

 Fisher (Prof. E. F.), Resources and Industries of the 



United States, 131 

 Fisher (H. A. L.), to Address the Annual Conference of 



Educational .'\ssociations, 361; 

 Fisk (Prof. W. W.), The Book "of Cheese, 528 

 Fitzsimons (F. W.), The Natural History of South African 



Mammals, 4 vols., 469 

 Flack (Dr. M.), appointed Milroy Lecturer of the Royal 



College of Physicians, 608 

 Flamand (G. B. M.), The Discovery of a Lens of Coal at 



Port-Gueydon, 307 

 Flamsteed (J.), The Bicentenary of the Death of, 417 

 Fleck (Dr. A.), The Separation of Isotopes, 565 

 Fleming (A. P. M.), Industrial Research, 470; and others. 



Works Schools, 522 

 Fleming (Prof. J. A.), Progress of Electrical Invention, 

 239 ; Speaking across the Atlantic by Wireless Tele- 

 phony, 179 : The Thermionic Valve and its Develop- 

 ments in Radiotelegraphy and Telephony, 462 

 Fletcher (Prof. S. W.), Strawberry-growing, 592 

 Fleure (Prof. H. J.), The Survival in Remote Parts of 



Wales of a Primitive Type, 487 

 Flint (Rev. Dr. W.), Race Consciousness, 118 

 Flower (Major S.), The Destruction of Birds in Lower 



Egypt, 444 

 Forbes (Dr. H. O.), The Audihility of Thunder, 315 

 Forster (Sir Ralph), The Organic Department of the 

 Chemical Laboratories of University College, London, 

 to be named after, 344 

 Fortescue (Prof.), Application of the Three-electrode 



Thermionic. Valve, 487 

 Fotheringham (Dr. J. K.), The Motion of the Moon, 612 

 Fouch^ (Ed.), Search for a Characteristic Equation Ap- 

 plicable to .Atmospheric Air, 491 

 Fowler (Prof. A.), awarded a Gold Medal by thf National 

 Academy of Sciences, Washington, 296 ; elected Presi- 

 dent of the Royal Astronomical Society, 671 ; Spectro- 

 scopic Astronomy, 234 ; The Centenary of the Royal 

 Astronomical Society, 674 ; The Theory of Relativity, 

 632 

 Fowler (Sir Henry), elected President of the Institution of 



Automobile Engineers, 638 

 Fox (H. M.), elected a Fellow of Gonville and Caius Col- 

 lege, Cambridge, 616 

 Fox (Dr. R. H.), Dr. John Fothcrgill and his Friends : 



Chapters in Eighteenth-century Life, t 

 Frankland (Prof. P. F.), awarded the Davy Medal of the 



Roval Societv, 29"; ; 363 

 Franklin (Capt. T. B.), the Cooling of the Soil at Night, 



45° ; 458 



Fraser (D. C), Newton's Interpolation Formulas. 42 

 Fraser (.Sir Thomas R.), [death!, 474: [obituarv article], 1:05 

 Freedman (P.), Tungsten .Arc (" Pointolite ") Lamps, 358 

 Freeman {Dr. W. E.), British Botanic Gardens and Stations, 



469 

 Fi^mont (C), A New Method for losting the Fragility of 



Metallic Tubes, 347 

 French (J. W.), Percussion Figures in Isotropic Solids, 312 ; 



The Surface I.ayor of an Optical Polishing Toot. 682 



