Nature, "] 

 Octo'.'tr 7, 1920 J 



Index 



XXXlll 



Coralliniorphub, The Genus, T. A. Stephenson, 474 

 Correlation Coefficient, Partial, in Samples of 30, An Ex- 

 perimental Determination of the Distribution of the, J. 

 W. Bispham, 187 



CORRESPONDENCE. 



Aerial Navigation and Meteorology, Lt.-Col. E. Gold, 775 ; 



Prof. E. van Everdingen, 776 

 Alligator Pear, The, Dr. M. Grabham, 517 

 AU-or-None " in the Auditory Nerve, Dr. W. Perrett, 



390 

 Almost-Atolls, The Small Islands of. Prof. \V. M. Davis, 



292 

 Antarctic Anticyclone, The, Dr. G. C. Simpson, 777 ; R. M. 



Deeley, 808 

 Anticyclones, R. M. Deeley, 677 

 Anti-Gas Fans, Mrs. Hertha Ayrton, 422, 612, 613; Prof. 



A. J. AUmand, act 612 

 Applied Science and Industrial Research, J. W. Williamson, 



387, 518; Prof. F. Soddy, 422; Major A. G. Church, 



423, 547 

 Aquarium Cultures for Biological Teaching, Dr. Monica 



Taylor, 232 

 .\rmv:'the New, Science and. Col. E. H. Hills, 103 ; Prof. 



L. N. G. Filon, 133 ; Prof. R. Whiddington, 134 ; 



Lt.-Col. E. Gold; Dr. C. S. Myers, 135; Prof. A. R. 



Richardson, 170 ; K. E. Edgeworth, 233 ; C. S. 



Wright, 391 ; The Universities and the. Dr. F. J. M. 



Stratton, 234 

 .Atomic : and Molecular Forces and Crystal Structure, Dr. 



A. E. Oxley, 327 ; and Molecular Structure, On, Dr. 



A. E. Oxley, 231; Structure, Theories of, I. Langmuir, 



261 ; Weights, The Standard of. Prof. J. R. Parting- 

 ton, 264; Dr. S. Miall, 294 

 Atoms, On Langmuir's Theory of, S. C. Bradford, 41 ; 



Dr. A. E. Oxley, 105 

 .Aurora of March' 22-23, The, W. B. Housman, 200 

 Balloons, Free, The Stretching of Rubber in. Dr. H. P. 



Stevens; W. H. Dines, 613 

 Bees: and the Scarlet-Runner Bean, H. J. Lowe, 742; 



Eye-Colour in, Prof. T. D. A. Cockerell, 518 

 Bohr's Paramagnetic Hydrogen Atom, A Possible Cause 



for the Diamagnetism of, J. R. Ashworth, 516 

 Books, Scientific and Technical. Sir R» A. Gregory, 41 

 Brent Valley Bird Sanctuary, The, W. M. Webb, 614 

 British : and Foreign Scientific Apparatus, D. H. Baird, 



390; J. W. Ogilvy. 424; J. S. Dunkerly. 425; F. W. 



Watson Baker, 518 ; Prof. W. M. Bayliss, 641 ; and 



Metric Systems of Weights and Measures, M. E. 



Yeatman, 355 ; A. S. E. Ackermann, 456 ' 

 Buzzards and Bitterns, Rev. Canon E. McClure, 105 

 Calendar Reform, C. Flammarion ; Dr. A. C. D. Crom- 



melin, 105 

 Chemical Service, The Indian, Prof. Jocelvn Thorpe, 324 ; 



Sir PrafuUa Chandra R4y, 325 ; Dr. M. W. Travers, 



354 



Chlorine : The Separation of the Element, into Normal 

 Chlorine and Meta-Chlorine, and the Positive Electron, 

 Prof. W. D. Harkins; Dr. F. W. Aston, 230; the 

 Isotopes of. The Separation of, D. L. Chapman, 487, 

 611; Prof. F. Soddy, 516, 642: A. F. Core, 582, 677 



Commercial Parasitism in the Cotton Industry, O. F. 

 Cook, 548 



Contour Colouring, the Layer System of, Dr. J. G. 

 Bartholomew and, G. G. Chisholm, 328 



Cotton : Growing in the British Empire, Dr. W. Lawrence 

 Balls, 103 ; Sir George Watt, 104 ; Industry, Commer- 

 cial Parasitism in the, O. F. Cook, 548 



Cricket, The Mole, F. V. D., 294 



Crystal Structure, Atomic and Molecular Forces and. Dr. 

 k. E. Oxley, 327 



Daylight Saving and the Length of the Working Day, 

 .Annie D. Betts, 41 



Decimal Coinage, H. Allcock, 261 



Definite Integrals between Finite Limits, A New Method 

 for Approximate Evaluation of, A. F. Dufton, 354, 455 ; 

 C. F. Merchant, 422 ; Commander T. Y. Baker, 486 



Diamagnetism : and the Structure of the Hydrogen Mole- 

 cule, Dr. .A. E. Oxley, 581 ; of Bohr's Paramagnetic 



Hydrogen Atom, A Possible Cause for the. Dr. J. R. 



Ashworth, 516; of Hydrogen, The, Dr. J. R. Ash- 

 worth, 645 ; Dr. A. E. Oxley, 709 

 Doctor of Philosophy in England, The, Dr. H. O. Forbes, 



234 

 Eiffel Tower Wireless Time-Signals, Prof. R. A. Sampson, 



265 

 Elements, The Constitution of the. Dr. F. W. Aston, 8 



547 

 Ellipse, Perimeter of an, R. A. P. Rogers, 8 

 Entomologists, Practical, The Training of, Dr. A. D. 



Imms, 676 

 Eocene Flints, Naturally Fractured, J. Reid Moir, 358 

 Equivalence, The Principle of, and the Notion of Force, 



C. A. Richardson, 72 

 Expenses of Scientific Work, Major A. G. Church, 72 " 

 Fellow-Workers, Sir Ronald Ross, 455 



Fireball of February 4, M. L. Dey, W. F. Denning, 105 

 Fishery Investigations, International Council for, X. Y. Z. 



262 ; Prof. W. C. Mcintosh, 167, 358 

 FitzGerald-Lorentz Contraction Theory, 'The, H. H. Poole, 



200 

 Fizeau Effect in an Electron Stream, An Attempt to Detect 



the. Prof. R. Whiddington, 708 

 Flying-fish, The Flight of. Dr. J. McNamara, 421 ; Prof. 



W. N. F. Woodland, Sir David Wilson-Barker, 455 

 Genera and Species, A. Mallock, 675 

 Glacial Anticyclone, The Mechanics of the, illustrated bv 



Experiment, Prof. W. H. Hobbs, 644 

 Gravitational : Deflection of High-speed Particles, Prof. 



A. S. Eddington, 37 ; H. G. Forder, 138 ; L. Page, 



233 ; Shift of Spectral Lines, Dr. H. Jeffrevs, 37 

 Halo, A Peculiar, Capt. C. J. P. Cave, 171 

 Hawthorn Blossom, Early, Lady Jenny Rose, 234 

 High Levels in the Atmosphere, Attainment of, W. H. 



Dines, 454 

 High Rates of Ascent of Pilot Balloons, Dr. W. van 



Bemmelen, 485 ; J. S. Dines, 581 

 Hydrogen, The Secondary Spectrum of. Prof. J. W. Nichol- 

 son, 166 

 Hyperbolic Space, Relativity and. Prof. A. McAulay, 808 

 Ice, Curious Formation of, A. S. E. Ackermann, 741 

 Indian Chemical Service, The, Prof. Jocelyn Thorpe, 324 ; 



Sir Prafulla Chandra RSy, 325 ; Dr. M. W. Travers, 



354 

 Industrial Research, Scientific Direction of, Major A. G. 



Church, 40 

 Integration, Approximate, and of Computing Areas, Some 



Methods of, A. S. Percival, 70; Prof. J. B. Dale; 



R. A. P. Rogers, 138 

 lonisation in the Solar Chromosphere, M. N. Saha, 232 

 Isomerism, An Electronic Theory of, Dr. H. S. Allen, 71 ; 



W. E. Garner; S. C. Bradford, 171 

 Isotopes : The Separation of. Dr. T. R. Merton and Brig.- 



Gen. H. Hartley, 104 ; of Chlorine, The Separation of 



the, D. L. Chapman, 487, 6u ; Prof. F. Soddy, 516, 



642 ; A. F. Core, 582, 677 

 Jupiter, The Great Red Spot on, W. F. Denning, 423 

 Kent's Cavern, The Condition of, E. A. Martin, 742 

 Knowledge and Power, L. Bairstow, 135; F. O. I., Dr. 



J. W. Evans, 165 

 Laboratory Fittings, The Cost of. A. E. Munby, 294, 456 ; 



C. Beck, 355 ; B. H. Morphy ; C. Baker, 356 ; Bel- 



lingham and Stanley, Ltd. , W. Taylor ; H. W. Ash- 

 field, 357 

 'Langmuir's Theory of Atoms, On, S. C. Bradford, 41 ; 



Dr. A. E. Oxley, 105 

 Light : Deflection of. During a Solar Eclipse, J. A. 



Orange ; Dr. A. C. D. Crommelin, 8 ; the Deflection 



of, Marat and. Prof. W. A. Osborne, 456 

 London University Site and Needs, Sir E. Sharpey Schafer, 



484 

 Magnetic : Shell, The Construction of a, Equivalent to a 



given Electric Current, Dr. A. A. Robb, 199 ; Storm of 



March 22-2^^, The, and Associated Phenomena, Dr. C. 



Chree, 136; Rev. A. L. Cortie, 137; Dr. A. C. 



Mitchell, 170 

 Marat and the Deflection of Light, Prof. W. A. Osborne,. 



456 

 Medical Education, Science in. Prof. S. J. Hickson, 643 



