XVIll 



Index 



[ 



Notura, 

 April 14, 1921 



Parker (H. T.), Mental Efficiency, 200 



Parker (W. H.), appointed Director of the National Insti- 

 tute of Agricultural Botany, 576 



Parkinson (I.), The Term " Lak," 89 



Parsons (Prof. F. G.). The Modern Londoner and the Long 

 Barrow Man, 516 



Parsons (Dr. J. H.), elected President of the Illuminating 

 Engineering Society, 545 



Parsons (T. R.), appointed an Additional Demonstrator in 

 Physiology in Cambridge University, igg ; re-elected to 

 the Michael Foster Research Studentship in Cambridge 

 University, 298 



Partington (Prof. J. R.), Odours Caused by Attrition, 631 ; 

 Relativity, 113 



Pascal (M.), Resultant Pressure on a Wing of an Aeroplane, 

 491 : 11., 522 



Pastorelli and Rapkin, Ltd., Catalogue of Self-recording 

 Meteorological Instruments, 481 



Paton (Dr. S.), Presidential Address to the Eugenics Asso- 

 ciation of America, 222 



Patterson (A.X Civics, 579 



Pavel (F.), The Binary Star, 76 ; Ophiuchi, 772 



Peachey (S. J.), Cold Vulcanisation of Rubber, 481 



Pear (Prof. T. H.), elected an Honorary Secretary of the 

 Manchester Literary and Philosophical Society, 288 



Pearl (Prof. R.), A Contribution of Genetics to the Practical 

 Breeding of Dairy Cattle, 587; The Nation's Food: A 

 Statistical Study of a Physiological and Social Problem, 

 305 



Pearson (Prof. Karl), Presidential Address to the Anthropo- 

 logical Section of the British Association, 233 



Pearson (W. H.), A Collection of Hepatics from the 

 Cameroons, 520 



Peart, The Child and the Mummy, 513 



Peddie (Prof. W.), Fechner's Law and the Self-luminosity of 

 the Eye, 490 ; The Avoidance of Relativity which is not 

 of Galileo-Newtonian Type, 850 



Peet (Prof. T. E.), Ancient Egyptian Mathematics, 850 



Pemberton (Rev. J. H.), Roses : Their History, Develop- 

 ment, and Cultivation. Second edition, 371 



Penfold (A. R.), The Essential Oils of Leptospermum 

 odoratum and L. grandiflorum, 682 



Pennell (V. C), appointed a Junior Demonstrator in 

 Anatomy in Cambridge University, 744 



P^rard (A.), The Interference Method for the Determina- 

 tion of Quartz Standards of Length, 586 



Perkin (Dr. F. Mollwo), appointed a C.B.E., 415 



Pernot (Dr. F. E.), Submarine-cable Signalling, 253 



Perrett (Dr. W.), Peetikay : An Essay towards the Abolition 

 of Spelling:: Being a Sequel to "Some Questions of 

 Phonetic Theory." Part i., 1916, 309 



Perrin (Prof. J.), elected an Honorary Member of the Royal 

 Institution, 478 



Perrycoste (F. H.), Coloured Thinking, 829 ; The Organisa- 

 tion of University Education, 47 



Peterson (Sir William), [obituary article], 668 



Petri (L.), Cause of Arrested Development of the Ovary in 

 the Olive, 491 



Petrie (Dr. J. M.), Cyanogenesis in Plants. Part iv., 651 ; 

 The Chemical Examination of Microeamia spiralis, 427 



Petrie (Prof. W. M. Flinders), Recent Discoveries of the 

 British School in Egypt, 516; The Genesis of Coptic 

 Twists and Plaits, 543 



Piaggio (Prof. H. T. H.), An Elementary Treatise on 

 Differential Equations and their Applications, 722 



Pick (Capt. W. H.), A Method of Obtaining the Degree of 

 Visibility on Cloudy Nights, 58 ; The Ground Day 

 Visibility at Cranwell, Lincolnshire, go 



Pickard (Dr. R. H.), appointed Director of Research to 

 the British Leather Manufacturers' Research Associa- 

 tion, 543 



Picken (D. K.), A Generalisation of Elementary Geometry, 



714 

 Pickering (S.), [obituary article], 509 ; (the late), The 



Action of Grass on Fruit Trees, 666 

 Pickering (Prof. W. H.), Lunar Observations, igi 

 Pictet (Prof. A.), The Constitution of Cellulose, 164 

 PiWallu (A.), ■ P. Malvezin, and L. Grandcharap, The 



Action of 0,\ygen on the Musts of Red Grapes, 618 



Pieragnoli (LJ, Pathology of Vrtus jpelaeus from the 



Caves of Equi, 491 

 Pigorini (L.), Colouring Matter from the Eggs of Silk- 

 worms, 35; and R. Grandiori, Action of Sulphide of 



Lime on Lepidopterous Ova, 35 

 Piiper (C), Medical Folk-lore of the Abantu in the Lijden- 



burg District, 426 

 Pijper (C), A Prehistoric Rock-Sculpiure from the North- 



Eastern Transvaal, 231 

 Pincherle (S.), Complete Iteration of x' — 2, 100 

 Pingriff (G. N.), Leicestershire, 627 

 Pitt (Frances), Wild Creatures of Garden and Hedgerow, 



246 

 Pitt (W.), [obituary], 669 

 Planck (Prof. Max), Die Entstehung und bisherige 



Entwicklung der Quantentheorie, 508 

 Plaskett (Dr. H. H.), The Origin of Spectra, 387 

 Plaskett (J. S.), The Orbit of U Coronae, 772 

 Plimmer (R. H. A.), re-appointed Research Lecturer in 



Applied Biochemistry at the Rowatt Research Institute, 



264 

 Plumb (Prof. C. S.), Types and Breeds of Farm Animals. 



Revised edition, 659 

 Politzer (Prof. A.), [obituary], 54 

 Pollock (Dr. J. A.), The Stethoscope, with a reference to 



a Function of the Auricle, 682 

 Pope (Sir William J.), The British Association, no 

 Popenoe (P.), and Prof. R. H. Johnson, .Applied Eugenics, 



7S2 

 Porcher (C), and L. Panisset, Experimental Researches on 



Colostrum, 779 

 Porter (Dr. Annie), The Life-history of Fasciola gigantica, 



389 

 Porter (Prof. A. W.), elected President of the Faraday 



Society, 607 

 Portevin and Garvin, The Quenching of Carbon Steels, 159 

 Potts (F. A.), appointed Demonstrator of Comparative 



Anatomy in Cambridge University, 649, 776 ; Vital 



Staining, 520 

 Potts (H. E.), How can the Results of Chemical Research 



be best Protected by Patents?, 554 

 Poulton (Prof. E. B.), Heredity and Acquired Characters, 



532 ; The Hereditary Transmission of Marking in the 



Forewing of Abraxas grossulariata, 487; The Life of 



Ronald Poulton, 369 

 Power (S.). Thurston's Lava-tube near Kilauea, 27 

 Powers (S.), Hawaiian Petrology, 673 

 Poynting (Prof. J. H.), Collected Scientific Papers, 559 

 Prain (Sir David), elected President of the Association of 



Economic Biologists, 838 

 Preston (F. W.), Visibility of the Landscape during Rain, 



343 

 Price (Dr. T. Slater), The British Photographic Research 



Association, 635 

 Prideaux (Dr. E. B. R.), Name for the Positive Nucleus, 



567 ; Problems in Physical Chemistry : With Practical 



Applications. Second edition, 107 

 Priest, Gibson, and McNicolas, The Munsell System of 



Colour Notation, 739 

 Pring (Dr. J. N.), appointed head of the Physical Chemistry 



Branch of the Research Department, Royal Arsenal, 



Woolwich, 488 

 Pryor (E. A. Coad), British Laboratory and Scientific 



Glassware, 374 

 Pullinger (F.), [obituary], 605 



Quine (E.), The Glass Research Association, 506 



Radin (P.), History of the Ancient Mexicans, 188 



Raineri (R.), CorallinacesE from Tripoli, i., ii., 35; iii., loc 



Raman (Prof.), Variation of the Bowing Pressure with th* 



Pitch of the Note, 355 

 Randolph (I.), [obituary], 86 



Rankine (Prof. A. O.), The Proximity of Atoms in Gaseous 

 Molecules, 457 ; The Similarity between Carbon Di- 

 oxide and Nitrous Oxide, 457 

 Rastall (R. H.>, and W. H. Wilcockson, Tungsten Ores, 



.i2S 



