Index 



r Naturt, 

 [,At>ril 14, I92t 



Multenions and Differential Invariants, Prof. A. McAulay, 



553 

 Munitions, Ministry of, Department of Explosives Supply : 



Preliminary Studies for H.M. Factory, Gretna, and 



Study for an Installation of Phosgene Manufacture, 270 

 Munsell's System of Colour Notation, Examination of, 



Priest, Gibson, and McNicolas, 739 

 Museum Work, Proposed Examinations in, 840 

 Museums in Education : 269 ; E. W. Shann, 344, 384 

 Musk Plants, Loss of Fragrance in, Mrs. W. H. Cope, 221 

 Muslim University : Bill, The, 66 ; of Aligarh, Speech at 



Inauguration of the. Raja of Mahmudabad, 680 

 Musts of Red Grapes, The Action of Oxygen on the, A. 



Pi^dallu, P. Malvezin, and L. Grandchamp, 618 

 Mycology, The Imperial Bureau of, 543 

 Myopia, The Prevention of, Dr. Edridge-Green, 550 

 Myriapodologists, Portraits of, B. B. Woodward, 48 

 Mysore : The Acid Rocks of the State of, P. S. Iyengar, 



122 ; The Limestones of, B. Jayaram, 122 



National : Physical Laboratory, Collected Researches of 

 the, vol. xiv., 673 ; Union of Scientific Workers, Annual 

 Meeting of the, Prof. L. Bairstow elected President 

 ■ for 192 1, 391 



Nation's Food, The, A Statistical Study of a Physiological 

 and Social Problem, Prof. R. Pearl, 305 



Native Races of the Empire, 65 



Natural : History of Everyday Creatures, The, 246 ; His- 

 tory Museum Staff Association, Scientific Re-union of 

 the, 478 ; Society of Northumberland, Durham, and 

 Newcastle-upon-Tyne, Report of the Council of the, 479 



Naturalist, A, on Lake Victoria : with an Account of 

 Sleeping Sickness and the Tse-Tse Fly, Dr. G. D. H. 

 Carpenter, 762 



Nature : Philosophical Aspects of. Prof. H. Wildon Carr, 

 102 ; The Concept of, Tarner Lectures delivered in 

 Trinity College, November, 1919, Prof. A. N. White- 

 head, 102 ; versus the Australian, Dr. Griffitji Taylor, 



45° 

 Navigation, A New Method of, W. A. Loth. 330 

 Negro Life in South Central Africa, Sir H. H. Johnston, 410 

 Nemocera, Oriental and South Asiatic, Catalogue of, E. 



Brunetti, 88 

 Neon Lines and Runge's Rule, The Magnetic Separation 



of. Prof. H. Nagaoka, 848 

 Nepean River, The Volcanic Neck at the Basin, G. D. 



Osborne, 395 

 Nervous System, Prof. Sherrington's Work on the, Dr. 



E. D. Adrian, 442 

 Newcastle-upon-Tyne, The University Colleges of, Appeal 



of, 456 

 New South Wales ; Some New Brachiopods from the Middle 



Palaeozoic Rocks of, J. Mitchell, 71:; ; The Atrvpidce 



of, etc., J. Mitchell and W. S. Dun. 135 

 Newton to Einstein. From, Changing Conceptions of the 



Universe, Dr. B. Harrow, 466 

 New Year Honours Lists, The, 606 

 New York : Aquarium, Report of the, 158 ; Zoological 



Society, Birth of a Chimpanzee in the Gardens of the 



38s 

 Nickel-steels of the Invar Type, Cause of Instability in, 



Ch. Ed. Guillaume, 545 

 Nile : Control, Sir Murdoch MacDonald, 557 ; Projects 



Commission, Interim Report of the, 56;" The, Egypt, 



and the Sudan, 557 

 Nitrate : of Thallio-nitrite of Thallium, Thermic Analysis 



of_ the System of, V. Cuttica, 522 ; Supplies and 'the 



Nitrogen Industry, 634 

 Nitrates, The Effect of the Concentration of, on the Re- 

 ducing Powers of Bacteria, R. W. Glazer, 588 

 Nitrogen : Industry, The, H. E. Fischer, 634 ; in Urine, 



The Comparative Evaluation of the Total, by the 



Methods of Dumas and Kjcldahl, W. Mestrezat and 



Mile. M. Paul-Janet. 521 

 Nitrohalogen Methanes. Poisoning by the, A. Maver M 



Plantefol, and F. V14s, 682 

 Nobel Prize : for Medicine, The, for 1919 awarded to Dr. 



J. Bordet; that for 1920 to Prof. A. Krogh, 319; for 



Physics for 1920 awarded to Dr. C. E. Guillaume, 383 



Nocturnal Radiation during Clear Nights, The Variation 

 of, A. Boutaric, 586 



Nomography, A First Course in, Dr. S. Brodetsky, 593 



Non-Euclidean Geometries, Prof. G. B. Mathews, 790 



Non-ferrous Alloys, Scientific Studies of, C. T. Heycock 

 (Presidential Address to Section B of the British AiyO- 

 elation), 60 



Non-mathematical Boys, The Handling of, Rev. S. H. 

 Clarke, 645 



Norsemen in Canada in a.d. iooo, The, with the Plants they 

 reported, Dr. B. Daydon Jackson, 5i;3 



North : American Pliocene Flora, A, G. C. Matson and 

 E. W. Berry, 89 ; East Coast Institution of Engineers 

 and Shipbuilders, the Educational Functions of the, 

 A. E. Doxford, 356; Pole, Has the, been Discovered?, 

 T. F. Hall, 499; Wales, The Soil Types of, G. W. 

 Robinson, 551 ; University College of. Gift by T. D. 

 Owen, 199 



Northern Polytechnic Institute, Establishment of a School 

 of Rubber Technology in the, 66 



Norwegian Meteorological Institute, Jahrbuch of the, for 

 1919, 770 



Notched-bar Impact Tests, T. E. Stanton and R. G. C. 

 Batson, 514 



Nototherium Mitchelli, H. II. Scott and C. Lord, 199, 330 



Nova: AquUae III., Spectrograms of, F. J. M. Stratton, 

 358 ; Spectrum of, in July, 1920, A. Hansson and H. 

 Jelstrup, 682 ; Cygni, N. Tamm, 91 : The, W. F. 

 Denning, 254 ; Observations of, A. Vela, 298 ; The 

 Spectrum of, Rev. A. L. Cortie, 79 ; Persei, Obsorvri- 

 tions of, Prof. Barnard, 124 



Novae, Catalogue of, 674 



Nuclear Activity, The Nature of, D. H. Tennent, 587 



Nucleic Acids : Their Chemical Properties and Physio- 

 logical Conduct, Prof. W. Jones. Second edition. 724 



Nucleus, Positive, Name for the, Sir Oliver Lodge, 4*7 : 

 Prof. F. Soddy, 502 ; Dr. E. B. R. Prideaux, 567 



Nudity, Ritual, in North Albania, Miss M. E. Durham, .;43 



Numbers, The Theory of : and other Branches of Mathe- 

 matics, Relations between Prof. L. Dickson, 196 ; Some 

 famous Problems of, and in particular Waring's 

 Problem, Prof. G. H. Hardy, 239 



Ocean, The Re-challenge to the, loi 



Odours caused by Attrition, Prof. J. R. Partington, 631 



Oidium, A Treatment Preventive of, J. Kunstler, 99 



Oil : and Gas, Prospecting for, L. S. Panyity, 625 ; -field. 

 The New, of Northern Canada, \V. Jones, 474 ; -finding : 

 An Introduction to the Geological Study of Petroleum. 

 E. H. Cunningham Craig. Second edition, 78; Modern, 

 H. B. Milner, 625 ; Geology, H. B. Milner, 76 ; Popu- 

 lar, Prof. V. Ziegler, 76; Industry, The, H. Ingle. 4"- : 

 The Discharge of, from Ships into the Sea, Effects of. 

 Sir ,'\rthur Shipley, and others, 702, 737; The Effects 

 of, on certain Sea-birds, Dr. W. E. Collinge, 830 



Oils, Fats, and Waxes, Technical Handbook of, P. J. Fryer 

 and F. E. Weston. Vol. i., Chemical and General. 

 Third edition, 466 



Oil-seeds, Reports on, 177 



01igoch,-cta : New British, Rev. H. Friend. 377; The Poly- 

 phvietic Origin of Genera in the. Prof. J. Stephenson, 

 486 . 



Olive, the Ovary in the. Cause of Arrested Development 

 of, L. Petri, 491 



Olivine Group. The, A. F. Hallimond. 848 



Open-air Treatment, Science of Ventilation and, 601 



Opium Poppy, Indian Varieties of, H. M. Leake and B. 

 Ram Pershad, 57 



Ophthalmology, Foundation of a Prize in, by W. and Miss 

 S. Edmonds. 649 



Optical : Glass, Dr. A. L. Day, 481 ; Industry, The, 67Q ; 

 The Optical Society and the. 814.; Industries, The 

 Promotion of our, 749 ; Instruments, Standardisation of 

 the Elements of. Report of the Committee on the, s:;', ; 

 Methods in Control and Research Laboratories, 577 ; 

 Physical and, Societies' Exhibition, The. 643 



Orbit Determination, Charlier's Critical Surface in, A. 

 Wilkens, 356 



Ordnance Survey Maps, the Production of Small-scale, 

 Lt.-Col. W. J. Johnston, 390 



