Nature, "I 



. 1921J 



September 29 



Index 



XXVll 



Africa : The Backbone of, A Record of Travel during the 

 Great War, with Some Suggestions for Administrative 

 Reform, Sir Alfred Sharpe, 518 



Age-distribution of a Population, A Single Numerical Index 

 of the, Prof. R. Pearl, 223 



Agricultural : Botany, The National Institute of. Report of 

 the Potato Synonym Committee of, for 1920, 371 ; Co- 

 operation, L. Scott, 436; Education, Prof. A. J. 

 Perkins, 442 ; Practice and Economics in the United 

 Provinces, India, The Bases of, Dr. H. M. Leake, 807 ; 

 Research, 731 



Agriculture : and Fisheries in the Civil Service Estimates, 

 257 ; Indian, Dr. W. E. Brenchley and others, 58 ; 

 Research in. The Present Position of, Sir Daniel Hall, 



731 



Air : Density of the, at Geneva, Some New Measurements 

 of the, A. Treuthardt, 639 ; at Madrid and its Small 

 Variations, E. Moles, T. Batuccas, and M. Pay^, 640 ; 

 Maps, International, The Proposed, Lt.-Col. E. F. \V. 

 Lees, 533 ; Routes in the East Indian Archipelago, 

 Climatic Conditions on the Principal, Dr. C. Braak, 

 792 ; The, and its Ways, Sir Napier Shaw, 653 ; Upper, 

 International Exploration of the, C. J. P. Cave, 761 



Aircraft Propellers, High-speed, and the Destruction of 

 Gnats, H. C. Watts, 269 



Airplane Photography, Major H. E. Ives, 39 



Airscrews. \ Treatise on, W. E. Park, 389 



Alaska : Magnetic Tables and Magnetic Charts for 1920, 



D. L. Hazard, 372 ; Mineral Springs of, A. H. Brooks, 

 246 



Alaskan Salmon, The, Prof. B. W. Evermann, 219. 

 Albert Medal of the Royal Society of .Arts, The, presented 



to Prof. \. A. Michelson, 84 

 Alcohol, Industrial, British Plants available as a Source of. 



Prof. M. C. Potter, 170 

 Alcohology, 163 

 Alcohols : Secondary, The Preparation of the .Amines of, 



A. Mailhe, 191 ; The Catalvtic Dehvdrogenation of, 



E. K. Rideal, 158 



Alcvonaria in the Cambridge Museum, Prof. S. J. Hickson, 



' 189 

 Algebra : for Engineering Students, An, G. S. Eastwood 



and J. R. Fielden, 616; Vector, Elements of. Dr. L. 



Sriberstein, 616 

 Algebraical: Identity, 4X=Y^ — 37Z-, An. Prof. G. B. 



Mathews. 4^6; Identitv, An, Dr. H. C. Pocklington ; 



Rev. T. Cullen, 587 : W. E. H. Berwick, 652 

 Algol, A Photo-electric Study of, Prof. J. Stebbins. 311 

 Alkali Metals, The Constitution of the. Dr. F. W. .Aston, 



72 



Alkaline : Earth Fluorides, The Spectra of the. and their 

 Relation to each other, S. Datta, 444 ; Polysulphides, 

 The Use of the, for the Neutralisation of Certain Toxic 

 Gases. Desgrez, Gui'lemard, and Labat, 31 



Alloys : of Aluminium, Copper, and Zinc, containing High 

 ■ Percentages of Zinc, Constitution of the. Dr. J. L. 

 Haughton and Kathleen E. Bingham, 2q ; of Iron with 

 Nickel and Manganese, The Influence of Low Tempera- 

 tures on the Magnetic Properties of, Prof. K. Onnes, 

 Sir R. Hadfield. and Dr. H. R. Woltjer, 285 



Allyl Alcohol : The .Action of Heat on. in Presence of Various 

 Catalysts, P. Sabatier and B. Kubota. 702 : The 

 Catalvtic Decomposition of, P. Sabatier and B. Kubota. 



767 ■ 



Alpine Garden. .A Miniature, from Januarv to December, 

 R. A. Malbv. 2';'? 



Alsea Indian Tribe of Oregon, Myths of the, L. I. Frachten- 

 berg. 21.; 



Amenemhet. The Tomb of, Nina de Garis Davies, and Dr. 

 .A. H. Gardiner. 70 



American : and British : Engineers. Conference of, 504 ; 

 Superannuation Systems, <4? : W. Palin Elderton, 6c t : 

 Dr. J. W. Evans: W. Palin Elderton. 683: .Associa- 

 tion, Chicago Meetini? of the, ADpointm<^nts f>nd 

 Resolutions, ^6-c8 ; Resolutions of the Executive 

 Committee of the Council. i.-\\ ; Biological Re- 

 search. Personal Impressions of. W. B. Brierlev. 

 117; Cyninidae or Gall-wasps, A. C. Kinsev. 85: 

 Museum Novitates. No. i. 500; of Natural Histo'-v. 

 Journal of the. Vol. xx.. No. 5, 180; The Hall of the 



Age of Man in the, Prof. H, F. Osborn, 236; State 



Geological and Natural History Surveys, History of, 



G. P. Merrill, 533; Te.xt-books of Botany, New,,6g 

 Amines, Phenolic, The Preparation of Mixed Secondary and 



Tertiary, A. Mailhe and F. de Godon, 575 

 .Ammonia : A New Reaction, C. D. Zenghelis, 735 ; and the 



Nitrides : With special reference to their Synthesis, Dr. 



E. B. Maxted, 549 ; Synthesis, The Claude Process Jor, 



G. Claude, 765 ; under Very High Pressure, G. Claude, 



93 . 

 Ammoniacal Silver Carbonate, Dervin and Olmer, 670 

 Ammonium : and Sodium, The Molybdomalates of, E. 



Darmois, 607 ; Molybdate, The Influence of, on the 



Rotatory Power of Some Sugars, G. Tanret, 542 ; 



Molybdo-quinate, An, G. Tanret, 702 

 .Amycterides (Coleoptera), Revision of the. Part vi., Acan- 



tholophus, E. W. Ferguson, 479 

 Amylopectin, The Fundamental Organic Substance of, S. 



and A. Mayer, 383 

 Anaphylaxy : in Micro-organisms, The Phenomena of, C. 



Richet, E. Bachrach, and H. Cardot, 126 ; in Plants, 



A. Lumi^re and H. Couturier, 511 

 .Anemometers, The Comparability of, C. E. Brazier, 286 

 Andes, The Structure of the, J. A. Douglas, 436 

 Anode Rays of Beryllium, G. P. Thomson, 395 

 .Anglo-Swedish Society, award of Scholarships by the, to 



Miss Dorothy Cridland and G. R. Carline, 411 

 Angular Measurement, The Centesimal System of, adopted 



in Sweden, 21 

 Animal : Ecology in Deserts, P. A. Buxton, 190 ; Life in 



South Africa, S. H. Skaife, 136 

 Animals, The Defence of, grouped together against Poisons, 



Mme. Anna Drzewina and G. Bohn, 222 

 .Anniversaries and other Poems, Dr. L. Huxley, 136 

 .Annular Eclipse of .April 8, The, Dr. A. C. D. Crommelin, 



211; Sir Francis Darwin; Miss Eleonora Armitage ; 



E. L. Gill, 212 

 .Anopheles: Life of, ii., B. Grassi, 127; maculipennis. 



The rdle of the Domestic Rabbit in the Attraction and 



Nutrition of, J. Legendre and A. Oliveau, 254; 



propagate Malaria Directly?, Can, B. Grassi, 254; The 



Natural History of, and their Extermination, iii., E. 



Bora, 351 

 .Antarctic Expedition, Sir Erneft Shackleton's New, 602 

 .Antefoker. The Tomb of. Vizier of Sesostris I., and of 



his Wife, Senet, Nina de Garis Davies, and Dr. A. H. 



Gardiner, 70 

 Anthocyanic Pigmentation, The Variation of Organic Acids 



in the Course of. Mile. D. Kohler, 191 

 Anthocyanins and Anthocyanidins, Part iv.. Dr. A. E. 



Everest and A. J. Hall, 61 

 .Anthropology and the Government of Subject Races, Justice 



Murray, ^41 

 Anticlines in the Bighorn Basin, Wyoming, D. F. Hewett 



and C. T. Lupton, 216 

 .Anticryptogamic Product, An, R. Lance, 447 

 Antitoxins, Standardisation of Vaccines, Toxins, and, 161 

 Antilogs, Logs, and, R.T.A.I., 300 



.Antinometric and Polarimetric Measurements at High Alti- 

 tudes, A. Boutaric, 607 

 Applo Cnnker Fungus, The Methods of Infection of the, 



G. P. Wiltshire, 318 

 Archaeological Discoveries at Martres-de-Veyre, 597 

 .Arctic and Antarctic Exploration, A History of. The Lands 



of Silence, Sir Clements R. Markham, 291 

 .Arcturus, The Diameter of. Measurement of, F. G. Pease, 



725 . . 



.Aretinal Termination of the Optic Nerve in the Animal 



Series, .Anatomical Study on the, N. .A. Barbieri, 543 

 Argon, lonisation of, by Slow Electrons, G. D^jardin, 542 

 .Arguing in a Circle, Dr. F. C. S. Schiller, 670 

 •Aristarchus of Samos, The Copernicus of Antiquity, Sir 



Thomas Heath, 713 

 Aristotelian Society, Proceedings of the. New Series, Vol. xx., 



618 

 Arizona, Copper Deposits of, F. L. Ransome. 50 

 Art, Prehistoric, in Caves and Rock-shelters, M. C. Burkitt, 



460 

 Artefacts and their Geological .Age. T. Sheppard, 587 

 Artillery College, Woolwich, K. C. Browning appointed 



