128 



NATURE 



[March 24, 192 1 



C. De Stefani : Ligurian fossil sponges, iii. The 

 remains now described were from a calcareous 

 deposit at San Martino, near the Polcevera, and 

 include Dictyonina lychniscosa. — E. Del Vecchio : 

 Uniqueness in parabolic equations of the third order, 

 ii. — A. Campetti : Potential of excitement of electrons 

 in mixture of potassium and sodium vapours. — G. 

 Armellini : Secular perturbations in the inclination of 

 the minor planet Hungaria. — D. Maestrini : Action of 

 enzymes, v. : The resistance of phthalein to the action 

 of hydrochloric acid in presence of starch. — S. Sergi : 

 Vertebro-medullary topography of chimpanzee {Anthro- 

 popithectis troglodytes, female). The methods adopted 

 are, in the main, those of Pfitzner, and the diagram 

 and tables of measurements are applicable to the 

 study of the comparative anatomy of the chimpanzee 

 and of man in regard to the spinal medulla. — A. 

 Comessatti : Geometric theory of binary forms, iii. : 

 System of co-variants of given degree and Sylvester's 

 theorem. 



Books Received. 



Practical Dairying. By Dora G. Saker. Pp. viii+ 

 123. (London : Methuen and Co., Ltd.) 6s. net. 



History and Bibliography of Anatomic Illustration 

 in its Relation to Anatomic Science and the Graphic 

 .\rts. By Ludwig Choulant. Translated and edited 

 by Dr. Mortimer Frank. Pp. xxvii+435. (Chicago : 

 University of Chicago Press ; London : Cambridge 

 University Press.) 10 dollars net. 



Journal of the Scottish Meteorological Society. 

 "Vol. xviii. Third Series, No. xxxvii. (Edinburgh and 

 London : W. Blackwood and Sons.) 12s. 6d. 



Spot and .\rc Welding. By H. A. Hornor. (Techno- 

 logical Hand-books.) Pp. vii+296. (London : C. 

 Grififin and Co., Ltd.) 155. 



The Year-Book of the Scientific and Learned 

 Societies of Great Britain and Ireland. Thirty-seventh 

 Annual Issue. Pp. vii+354. (London : C. Griffin and 

 Co., Ltd.) 155. 



Pope's Manual of Nursing Procedure. By Amy E. 

 Pope. Pp. xi+^96. (New York and London : G. P. 

 Putnam's Sons.) 155. 



The Chemistry of Synthetic Drugs. By Dr. Percy 

 May. Third edition, revised. Pp. xv+248. (London : 

 Longmans, Green and Co.) 12s. 6d. net. 



The Journal of the Institution of Electrical En- 

 gineers. Vol. lix.. No. 297, January. (London : E. 

 and F. N. Spon, Ltd.) 105. 6d. 



Metabolism and Growth from Birth to Pubertv. 

 By Francis G. Benedict and Fritz B. Talbot. (Pub- 

 lication No. 302.) Pp. vi+213. (Washington: Car- 

 negie Institution.) 



The Qualitative Analysis of Medicinal Preparations. 

 By H. C. Fuller. Second edition, rewritten. Pp. 

 viii-figi. (New York: J. Wilev and Sons, Inc.; 

 London : Chapman and Hall, Ltd.) 12s. 6d. net. 



Red Lead and How to Use it in Paint. Bv Dr. 

 Alvah H. Sabin. Third edition, rewritten and en- 

 larged. Pp. xi+139. (New York: J. Wiley and 

 Sons, Inc. ; London : Chapman and Hall, " Ltd.) 

 IIS. 6d. net. 



A Text-Book of Geologv. Bv Louis V. Pirrson. 

 Part i. : Physical Geologv. Part ii. : Historical 

 Geologv. Part i., second edition, revised. Pp. vii+ 

 4.70. (New York : T. Wilev and Sdns, Inc. ; London : 

 Chapman and Hall, Ltd.) 17s. 6d. net. 



Chemistry of Pulp and Paper Making. Bv Edwin 

 Sutermeister. Pp. vii + 479+'^i plates. (New York : 

 T. Wilev and Sons, Inc. ; London : Chapman and 

 Hall, Ltd.) 36s. net. 



CEdema and Nephritis : A Critical, Experimental, 

 and Clinical Study of the Phvsiology and Pathology 

 NO. 2682, VOL. IO7I 



of Water Absorption in the Living Organism. By 

 Prof. Martin H. Fischer. Third and enlarged edition. 

 Pp. xvi+922. (New York : J. Wiley and Sons, Inc. ; 

 London : Chapman and Hall, Ltd.) 55s. net. 



The Chemistry and Analysis of Drugs and Medi- 

 cines. By Henry C. Fuller. Pp. ix+1072. (New 

 York : J. Wiley and Sons, Inc. ; London : Chapman 

 and Hall, Ltd.) 55s. net. 



A Textbook of Oceanography. By Dr. J. T. 

 Jenkins. Pp. x+206. (London : Constable and Co., 

 Ltd.) 15s. 



A Manual of the Birds of Australia. By Gregory 

 M. Mathews and Tom Iredale. Vol. i. : Orders 

 Casuarii to Columbse. Pp. xxiv+279+plates. (Lon- 

 don : H. F. and G. Witherby.) 3 guineas net. 



Das Physikalische Praktikum des Nichtphysikers. 

 By Dr. F. Grunbaum and Dr. R. Lindt. Dritte 

 aiiflage, by Dr. R. Lindt and Dr. W. Molius. Pp. 

 xvi+414. (Leipzig : G. Thieme.) 72 marks. 



Imperial Institute. Monographs on Mineral Re- 

 sources, with Special Reference to the British Empire. 

 Lead Ores. By T. C. F. Hall. Pp. ix+127. (Lon- 

 don : J. Murray.) 6s. net. 



The Quarterly Journal of the Geological Society. 

 Vol. Ixxvi. Part j.. No. 304, March. Pp. 325-412-1- 

 xiv+plates. (London : Longmans, Green and Co.) 

 7s. 6d. 



Diary of Societies. 



THVESDAT, March 31. 

 Institute of Metals (at Shaftesbury Hotel, Great St. Andrew 

 Street), at 8. — S. L. Archbutt : Aluminium Alloys. 

 FRIDAY, April 1. 

 RoTAL SociETr OF MEDICINE (Laryngology), at 4.43. 

 RoTAL Society of Medicine (Anaesthetics Section), at 8.30.— Dr. 

 R. L. M. Wallis and Dr. C. L. Hewer : A New General Ansesthetic : 

 Its Theory and Practice. 



CONTENTS. PAGE 



Research and National Progress 97 



Matter and Motion. By Prof. A. Gray, F. R.S. . . 98 



A Socialist Commonwealth. By Barbara Wootton zoo 



Science for the Young Farmer. By E. J. R loi 



A Fabre Anthology loi 



Our Bookshelf 102 



Letters to the Editor: — 



Atomic Structure. — Prof. N. Bohr 104 



The Dimensions of Atoms and Molecules. — Prof. 



W. L. Bragg and H. Bell .107 



The International Research Council. — Prof. G. H. 



Hardy. F.R.S 107 



Solar Radiation in Relation to Faculse. ( Wt'tA Dia- 

 gram.) — H. H. Clayton ...... 108 



The Sound of Distant Gun-fire. — C. Carus-Wilson ; 



Dr. Charles Davison .... 108 



Electrons. II. {Ilhistrated.) By Sir William Bragg, 



K.B.E., F.R.S 109 



Reformed Cannibals. {Ilhistrated.) By A. C. H. . . in 

 Obituary : — 



Prof. A. G. Nathorst. By Prof. A. C. Seward, 



F.R.S 112 



Notes 114 



Our Astronomical Column : — 



New Comet 1921a 119 



Re-appearance of Saturn's Ring 119 



Brazilian National Observatory Annual 119 



The Royal Anthropological Institute. By E. N. F. 120 

 Publications of the U S. National Research 



Council. By J. W^. VVilliamson 121 



Psychotherapy and War Experience. By Prof. 



T. H. Pear 122 



University and Educational Intelligence . . . 123 



Calendar of Scientific Pioneers 124 



Societies and Academies i2<; 



Books Received 128 



Diary of Societies 128 



