XXXll 



Index ■ 



r Nature, 



\_Scptember 29, igai 



Circumcision Regiments as a Native Chronology, W. A. 



Norton, 607 

 Citizenship, World, Education and, 707 

 Civics, The Summer School of, 220 

 Civil: Engineers, Institution of, A\vards of the, 307; List 



Pensions, New, 659 ; Service Estimates, Agriculture 



and Fisheries in the, 257 ; University Grants in the, 



225 ; Salaries, University and, 801 ; Science in the, i 

 Civilisation: Modern, Sir Michael Sadler, 700 ; Science and 



Capt. B. J. Marden, 623 ; J. Henderson Smith and 



Major A. G. Church, 684; Dr. C. V. Drysdale, 715; 



The Development and Spread of, W. J. Perry, 146; 



The Salvaging of, H. G. Wells, 707 

 Claude Process for Ammonia Synthesis, The, G. Claude, 



765 

 Clavellina Zooids, The Production of Living, in Winter by 



Experiment, Dr. J. H. Orton, 75 

 Clavicorn and Other Beetles, The, Dr. H. Scott, 413 

 Clay : in its Relation to Piles, Experiments with, A. S. E. 



Ackermann, 534; The Physical Properties of, iii., 



A. S. E. Ackermann 824 

 Cleridae, The, Schenkling, 413 

 Climate in North-west Europe, The Evolution of Climate in, 



C. E. P. Brooks, 286 

 Clisiophyllum, The Gertus, Prof. P. Macnair and C. M. 



Leitch, 606 

 Cloud : Form in the Lower Atmosphere. The Physical 



Structure of, R. F. Granger, 605 ; Forms, Capt. 



C. J. P. Cave, 365 

 Clouds : G. A. Clarke, 365 ; Systems of, P. Schereschewsky, 



575 



Coal : -fields, British, 38; in Great Britain, Dr. W. Gibson, 

 38; -mining Industry, The, Prof. H. Louis, 763; Oil, 

 or Wind, C. O. Liljegren, 152 ; Position, The, 193 ; 

 Pulverised, as a Combustible, Sir R. A. S. Redmayne, 

 812 ; The Economic Selection of, A. L. Booth, 282 ; 

 The Microstructure of, 282 ; The World-position in Re- 

 lation to, Sir Richard A. S. Redmayhe, 633 



Coals, Brown, and Lignites, Researches upon, part i. Prof. 

 W. A. Bone, 125 



Cobalt Ore, A New Deposit of, 25 



Cockchafer, The Resistance of the Adult, to Low and High 

 Temperatures, H. Faes and M. Staehelin, 703 



Cockroach, The, F. Laing, 565 



Cocoa and Chocolate : their Chemistry and Manufacture, 

 R. Whymper. Second edition, 713 ; their History from 

 Plantation to Consumer, A. W. Knapp, 357 



Coco-nut, The, Prof. E. B. Copeland, Second edition, 



391 

 Cohesion, Dr. H. Chatley, 786 

 Coiling of Underground Shoots of Convolvulus arvensis. 



Rev. Canon J. E. H. Blake, 747 

 Coke from Sarre Coal, The Production of, M. Baille-Barrelle, 



663 

 Cold, The Mechanical Production of, Sir J. A. Ewing. 



Second edition, 103 

 College de France, Retirement of Prof H. Bergson, 572 

 Colloidal : Arsenic Sulphide, The Flocculation of, A. Bou- 



taric and M. Vuillaume, 510; Theory, W. B. Hardy, 



226 

 Colloid Chemistry : An Introduction to Theoretical and 



Applied, " The World of Neglected Dimensions," Dr. 



W. Ostwald. Translated by Prof. M. H. Fischer, 226 

 Colloidoth^rapie : La, R^sultats Cliniques, Dr. J. Laumonier, 



358 

 Colloids : and Colloidal Electrolytes, Prof, J. W. McBain, 



46 ; The Chemistry of, Prof. R. Zsigmondy. Translated 



by Prof. E. B. Spear, two parts, 226 ; The Formation 



of. Prof. The Svedberg, 744 

 Colour Vision: A Quantum Theory of. Prof. J. Joly, 317; 



New Facts of. Dr. F. W. Edridge-Green, 826 

 Coloured Thinking and Thought-forms, G. Stridsberg, 55 

 Coma, The Calculation of the, G. Gouy, 286 

 Combinatory Analysis, An Introduction to. Major P. A. 



MacMahon, 357 

 Comet, New, 1921a, 119 

 Companions: Feathered, Furred, and Scaled, C. H. Donald, 



805 

 Concealing Coloration in the Animal Kingdom : An Ex- 

 position of the Laws of Disguise through Colour and 



Pattern : Being a Summary of A. H. Thayer's Dis- 

 closures, G. H. Thayer. New edition, 338 



Concrete, Reinforced : Protecting, from Marine Deteriora- 

 tion, F. E. Wentworth-Sheilds, 596 ; The Use of, on 

 British Railways, W. W. Grierson, 596 



Conical Refraction in Biaxial Crystals, Prof. C. V. Raman, 



747 

 Conies, Analytical, The Elements of, Dr. C. Davison, 616 

 Conifers in English Gardens, Miss G. Lister, 538 

 Conjoint Board of Scientific Societies, Fourth Report of the, 



600 

 Conscious, From the Unconscious to the, G. Geley. Trans- 

 lated by S. de Brath, 712 

 Conscription, Fraudulent Proceedings Practised to Avoid 



Service under, 470 

 Contact Pressures and Stresses, Prof. G. Coker, K. C. 



Chakko, and M. S. Ahmed, 280 

 Convolvulus arvensis. Coiling of Underground Shoots of. 



Rev. Canon J. E. H. Blake, 747 

 Coolidge Tube, a Danger Arising from the, when Used 



for X-ray Screen Work, Dr. A. E. Barclay, 53 

 Cooling of a Solid Sphere, The, with a Concentric Core of 



a Different Material, Dr. H. S. Carslaw, 446 

 Co-operative Indexing of Periodical Literature, 449 ; Dr. 



F. A. Bather, Prof. W. M. F. Petrie, Dr. J. W. Evans, 



A. P. Newton. S. Gaselee, 550; 551 

 Copernicus of Antiquity, The (Aristarchus of Samos), Sir 



Thomas Heath, 713 

 Copper : Deposits of Arizona, F. L. Ransome, 59 ; The 



Non-toxicity of, for Mildew, M. and Mme. G. Villedieu, 



31 

 Com Sales Bill, Second Reading of the, 243 

 Cornalith, R. Hedger Wallace, 811 



Cornell University, Dr. L. Farrand elected president of, 732 

 Corona Australis, The Variable Nebula in, H. K. Shaw, 634 

 " Corona Voltmeter," The, Prof. J. B. Whitehead, 119 

 Correction, A, Prof. J. A. Thomson, 811 



CORRESPONDENCE. 



" Absolute " Temperatures in Meteorological Publications, 



Sir Napier Shaw, 201 

 Acoustical Phenomenon, A New, Dr. J. Erskine-Murray, 



490; Dr. H. Hartridge; H. S. Rowell ; Prof. W. B. 



Morton, 586 ; Dr. G. A. Shakespear, 623 ; F. M. West, 



652 

 " Miher," " Space " or, Prof. A. S. Eddington, 201 ; Dr. 



Norman R. Campbell ; L. C. W. Bonacina, 234 ; Uniform 



Motion in the, E. H. Synge, 746; Dr. H. Jefireys, 747 

 Alcohol, Industrial, British Plants available as a source of, 



Prof. M. C. Potter, 170 

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



Mathews, 456 ; Dr. H. C. Pocklington 'y Father j 



Cullen, 587 ; W. E. H. Berwick, 652 

 Aircraft Propellers, High-speed, and the Destruction of 



Gnats, H. C. Watts, 269 

 Alkali Metals, The Constitution of the. Dr. F. W. Aston, 72 

 American and British Superannuation Systems, W. Palin 



Elderton, 651 ; Dr. J. W. Evans ; W. Palin Elderton, 683 

 Annular Eclipse, The, of April 8, Sir Francis Darwin ; Miss 



Eleonora Armitage ; E. L. Gill, 212 

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

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



Artefacts and their Geological Age, T. Sheppard, 587 

 Atmospheric Refraction, A. Mallock, 456 ; Dr. J. de Graaff 



Hunter ; A. Mallock, 745 

 Atom, the Size of the, lonisation Potential and, Prof. A. S. 



Eve, 552 

 Atomic Radius, The, and the lonisation Potential, Prof. 



Megh Nad Saha, 682 ; Structure, Prof. N. Bohr, 104 ; Dr. 



Norman R. Campbell, 170 

 Atoms and Molecoles, The Dimensions of, Prof. W. L. 



Bragg and H. Bell, 107 • • • , . 



Aurora in the South of England, The Common Occurrence 



of. Lord Rayleigh, 137 ; of May 13-15, The, Lord- 



Rayleigh, 392 

 Auroral Display, A. E. L. Hudson, 359 • 



