Nature^ "1 

 Apri( 15, 1920 J 



Index 



XV 



Nierenstehi (Dr. M.), The Colouring Matter of the "Red-pea 

 Gall," 707 



Niven (Prof. W.), Stone ajid . Terra-cotta Remains found 

 in, the Neighbourfjood ,of the City of Mexico, g 



Xormand (Lieut. C. W. B.), Effect of Higli Temperature, 

 Humidity, and Wind, on the Human .Body, 366 



\orris-Rogers (L. N.), Mirage Effects, 630 



North (F. J.), Syringothyris, AVinchell, and certain Car- 

 boniferous Brachioi;>oda referred to Spiriferina, 

 D'Orbigny, 586. . . . , 



Noyes, jun. (\V. A.), Polarisation in Iron S'olutions, 683 ; 

 The Potential Necessary fgr Electrolysing Solutions of 

 Iron, 407 



Nuttall (Prof. G. H. F,), ..Lice rmd their Relation to Disease, 

 45'' 



()akr>niilh (Dr. J.), Race and Personality: \n Inquiry into 

 the Origin and Growth of Patriotism, 311 



Ogilvie (A. G.), appointed Reader in Geography in .Man- 

 chester University, iq 



Ogilvie (Dr. F. G.), The I'-i- of iln- Sri'iice Museum, South 

 Kensington, 397 



Okada (Prof. T.), Weather Forecasting in Japan; 509 



Olivier (C. P.), and Van Maanen and Sanford, The 

 Paralla.\ of Nova Aquila', 1918, 160 



Olsen (Dr. O), to Conduct an Expedition to Siberia, 158 



O'Neill (J. J.), Platinum in Canada, 574 



Onslow (H.), .\ Periodic Structure in many Insect Scales, 

 and the Cause of their Iridescent Colours, 649 



Oppermann (.\.), Premiers El(''ments d'une Th^orie du 

 Quadrilatere Complet, 169 



Ormerod (Miss Eleanor .Xnne), .\ Memorial Tablet to, .it 

 St. Albans, 638 

 i Orton (Dr. J. H.), Se.x-phenomena In tlie Common I^imiXfi 



[Patella vulgata), 373 

 ■Osborne (Prof. h. F.), Portrait of, presented to the Sedg- 

 wick Museum, Cambridge University, 385 

 [Osier (Sir W^llllam), [death], 443 ; [obituary article], 472 



Owen (J. H.), The Nesting Habits of the Sparrow Hawk, 

 .78 



Owen (M. N.), .\ bungus Disease of Potato-tubers, 341 

 I Owen (W. n.l. (lulde to the Study of the Ionic Valve: 

 Shoeing its Development and .Application to Wireless 

 Telegraphs' and Telephony, 332 



Oye (Dr. P. van). The ChiPtognatha found in Plankton 

 taken off th" North Coa.st of Java, 446 



Page (I^.), Gravitational Deflection of High-speed Particles, 



{-((2 



Palrman (K.). 'I'ables of the Digannna and Trigamma 

 Functions. 341 



Palatini (Dr. A.) ha. Teoria di Relativita nel suo sviluppo 

 storico, 552 ; Traiettorie 'dinamlchc del sestemi oionomi 

 con tre gradi di llberta, 552 



Palmer (Capt. A. R.), "The White, Water," 563 



Palmer (G. W.), [obituary!, 136 



Paneth (Dr. F".), apjjointed Professor of Chemlstrv in Ham- 

 burg University, 426 



Parkinson (T. W. P.), Plea for the Encouragement of 

 Geographv In the Higher Forms of Secondary Schools, 



•514 



■Parmelee (Dr. .M.), Criminology, 687 



Parmentier (P.), Irrigation In Syria and Palestine, ^^ 



Parry (E.), The Interference of Power Circuits with Tele- 

 phone Circuits, i^iy 



Parry (Rear-.Adnpiral Sir John F.), Retirement of, as Hydro- 

 grapher of the Navy, 77 



Parsons (Hon. .Sir Charles A.), Presidential .Address to the 

 British .Association, 28; Researches at High Tempera- 

 tures and Pressures, 677 : 7()Q 



Parsons (Prof. F. G.), Racial Characters of the Modern 

 Briton, i>8'7 ; Results of an .Anthropological Examina- 

 tion of German Prisoners of War, 475 



Paton (Prof. D. Noel), Presidential Address to the Physi- 

 ology Section of the British Association, 39, 322 



Peake (H.). Origin and Relation of the Nordic and Mon- 

 goloid Elements in the Finnic Population, 4S7 



Pear (Prof. T. H.), The Elimination of Wasteful Effort In 



Industry, 387 

 Pearce (R.), Donation to the Royal Institution, 296 

 Pearl (Prof. Raymond), Analysis of the Monalily Statistics 



of the American Influenza Epidemic of igi8, 509 

 Pearson (Prof. Karl), A Method of Generalising Tcheby- 

 cheff's First Theorem, 580 



Peary (Rear-.Admlral R. E.), [obituary article], 699 

 Pease (F. G.), Lunar Photography with the loo-ln. Re- 

 flector, 5n ' , 

 Peddle (Prof. W.), The Adequacy of the Young-Helmholtz 

 Theory of Colour-vision and Colour-blindness, 715; 

 The Ouaternionic System as the Algebra of the Rela- 

 tions of Physics and Relativity, 715 ; The Atomic Space 

 Lattice in Magnetite, 714' 



Peel (T.), Examples in Heat and Heat I^ngines, C90 



Peet (T. E.), appointed Professor of Egyptology in Liverpool 

 University, 425 



P('-ringuey (Dr. L.), Bushmen Engravings, 44 

 I'errett (W.), Some Questions of Phonetic Theory, Chap, v.. 

 The Perception of Sound, 591 



Perrine (C. D.), Aphella of Planets and Comets, 343 



Perry (Sir Cooper), appointed Principal Ofticer of the Uni- 

 versity of London, 344 



Perry (W. J.), The Historical Process, 490 



Petavel (Prof. J. E.), appointed Director of the National 

 Physical ■ Laboratory, 8 ; Presidential Address ' to the 

 Engineering Section of the British Association, 38, 181 



Peters (I'rof. C. A.), The Preparation of Substances Im- 

 portant in .Agriculture. Third edition, 497 



I'ezard (.A.), .Alirrientary Castration in Cocks submitted to 

 an exclusively Cai-nivorous Diet, 323 



Philip (.A.), Some Laboratory Tests on Alineral Oils, 298 



Philip. (Prof. J. C), Physical Chemistry— Past and Present, 

 223 



Phillips (Dr. H. B.), Differential and I'ntegral Calculus, 

 109 



Picart (L.), and F. Courty, Ob-servations of the Metcalf 

 and Borrelly Comets, 128 



Pickard (Dr. R. H.), appointed Principal of Battersea 

 Polytechnic, 325 



Pickering (S.), Mirage Effects, 630; Radiation Tempera- 

 tures, i.;3 : The Explosion at Bailleul, :; 



Pickering (Prof. W. H.), Lunar Studies, 5'jj ; The Birth 

 of the Moon, 479; The Harvard Observatory at Mahde- 

 ville, Jamaica, 138 ; The Orion' Nebula, 448 ■ 



Pictet and Potok, The Distillation of Sodium Stearate and 

 .Sodium Oleate, 360 ' ' 



Filcher (R. B.), The Profession of Chemistry, 409 



PIrsson (Prof. L. V.) [obituary], 443 



Plimmer (Dr. R. H. .A.), appointed Head of the Bio- ' 

 chemical Department of Craibstorie Animal Nutrition 

 Research Institute, 127 



Planck (Prof. M.), awarded the Nobel Prize of igi8 for 

 Physics, 318 



Playfair (G. I.), Peridine;c of N.S.W., 587 



Poincar^ (L.), Speech at the Openitrg of the' British' Bureau 

 of the Office National des Unlversites et Ecoles 

 Franfaises, 712 ' 



Poincar^ (President), installed as Rector of Glasgow Uni- 

 versity; the Honorary Degree of LL.D. conferred upon, 

 by Glasgow I'niversity, 324 : Gift to GIa.sgow Univer- 

 sity, 325: Welcome to London, 295 



Pole-Evans (Dr. 1. B.), appointed Director of the Botanical 

 Survey of the Territoi'les included In the Union of 

 South .Africa, 607 



Fope (Sir William J.), The Photography of Coloured Ob-. 

 jects, 346; The Position of Chemistry in Germany and 

 this Country as a Result of the War, 455 



Porter (Prof. A. W.), The \'apour Pressure Of Binar\ Mix- 

 tures, 523 



Porter (Mrs. L.), Floral Developm'ent in Ti'tctispid'aria 

 laticeolala, 346 '' 



Portevin (M.), Influence of vario'Os Factors on the Creation 

 of Internal Longitudinal Strains during the Rapid Cool- 

 ing of Steel Cylinders, 407 'j ''■■■■" ■ 



Prain (.Sir David), elected Pt'esidcnt of the .Xss'ociation (if 

 Economic Biologists, 417 



Pj-eston (H.), Cost of ■•Laboratory'' Apphrafus, .^I4 



Priestley (Prof.),' The Phentfrtieiibn of' Root-pressure, 521 



