704 



NATURE 



[July 28, 192 1 



Books Received. 



Silzungsberichte der Konigl. Bohmischen Gesell- 

 schaft der Wissenschaften. Mathematisch-Natur- 

 wissenschaftliche Classe. Jahrgang 1915, 1916, 1917. 

 (Prag: Fr. Rivn^c.) 



M^moires de la Soci^t^ Royale des Sciences de 

 Boheme. Classe des Sciences. Ann^e 1918 : Ann6e 



19 19. (Prag : Fr. Rivn^c.) 



Ladislav Prai^ka. Untersuchungen iiber den Licht- 

 wechsel Alterer Veranderlicher Sterne. By Prof. Dr. 

 Vojtech Safafik. Vol. ii. Sterne des A.G. Kata- 

 loges^ von 5* 21m bis 24* A.R. Pp. iii+180. (Prag: 

 Fr. Rivn^C.) 



North England : An Economic Geography. By 

 L. Rodwell Jones. Pp. viii+256. (London : G. Rout- 

 ledge and Sons, Ltd.) 6s. net. 



Textile Design and Colour : Elementary Weaves 

 and Figured Fabrics, By W. Watson. Second edi- 

 tion. Pp. xi+436. (London : Longmans, Green and 

 Co.) IIS. net. 



Ministry of the Interior, Egypt : Department of 

 Public Health. Reports and Notes of the Public 

 Health Laboratories, Cairo : No. 4. Nutritive Value 

 and Characters of Rations Issued to Officials and 

 Others in Different Administrations of the Egyptian 

 Government. Pp. v+57. (Cairo : Government Pub- 

 lications Office.) P.T.20. 



The Statesman's Year-Book, 1921. Edited by Sir 

 J. Scott Keltie and Dr. M. Epstein. Fifty-eighth 

 annual publication. Pp. xliv+1544. (London: Mac- 

 millan and Co., Ltd.) los. net. 



The Joy of Mountains. By William Piatt. Pp. 80. 

 (London : G. Bell and Sons, Ltd.) \s. gd. 



Fundamental Principles of Organic Chemistry. By 

 Prof. Charles Moureu. Authorised translation from 

 the sixth French edition bv W. T. K. Braunholtz. 

 Pp. xviii+399. (London : G. Bell and Sons, Ltd.) 

 \2S. 6d. net. 



The Flora of the Nilgiri and Pulney Hill-Tops. By 

 Prof. P. F. Fyson. Vol. iii. ' Pp. xviii+581. 

 (Madras : Government Press.) 15.6 rupees. 



Forestry Commission. First Annual Report of the 

 Forestry Commissioners : Year ending September 30, 



1920. Pp. 60. (London : H.M. Stationery Office.) 

 ^d. net. 



Air Ministry : Meteorological Office. British 

 Meteorological and Magnetic Year Book, 19 10. 

 Part vi. : Roseau Mondial, 19 10. Charts showing the 

 Deviation of the Pressure and Temperature from 

 Normal Values for each Month and for the Year. 

 (London : H.M. Stationery Office.) Ss. 6d. net. 



Camping and Woodcraft : A Handbook for Vaca- 

 tion Campers and for Travelers in the Wilderness. 

 By H. Kephart. New edition (two volumes in one). 

 Pp. 405+479. (New York : The Macmillan Co. ; 

 London : Macmillan and Co., Ltd.) i6s. net. 



The Electfic Furnace. By Dr. J. N. Pring. (Mono- 

 graphs on Industrial Chemistry.) Pp. xii-l-485+xix. 

 (London : Longmans, Green and Co.) 325. net. 



Principles of Radio-Communication. By Prof. J. H. 

 Morecraft. Pp. x+935. (New York : J. Wiley and 

 Sons, Inc. ; London : Chapman and Hall, Ltd.) 45s. 

 net. 



The Silviculture of Indian Trees. B5' Prof. R. S. 

 Troup. Vol. i. : Dilleniaceae to Leguminosae 

 (Papilionaceae). Pp. lviii+336+iii. Vol. ii. : Legu- 

 minosae (Caesalpinieae) to Verbenaceae. Pp. xi+337- 

 783 + iv. Vol. iii. : Lauraceae to Coniferae. Pp. xii+ 

 785-1195. (Oxford: Clarendon Press.) 3 vols., 

 5Z. 5s. net. • 



The Development of the Atomic Theory. By A. N. 

 Meldrum. Pp. ii+13. (London: Oxford University 

 Press.) 15. 6d. net. 



NO. 2700, VOL. 107] 



Brown Bast : An Investigation into its Causes and 

 Methods of Treatment. By A. R. Sanderson . and 

 H. Sutcliffe. Pp. 71 + 26 plates. (London: Rubber 

 Growers' Association, Inc.) ys. 6d. net. 



Growth in Trees. By W. T. MacDougal. Pp. 41. 

 (Washington : Carnegie Institution.) 



The Microtomist's Vade-Mecum : A Handbook of 

 the Methods of Microscopic Anatomv. Bv A. B. Lees. 

 Eighth edition, edited by Dr. J. B. Gatenby. Pp. x-f 

 594. (London: J. and A. Churchill.) 285. net. 



A Practical Handbook of British Birds. Part xi. 

 Pp. 177-256. (London : H. F. and G. Witherby.) 

 4s. 6d. net. 



Berichte der Naturforschenden Gesellschaft zu Frei- 

 burg i Br. Dreiundzwanzigster Band, Erstes Heft : 

 Erschienen zur Feier des 100 Jahrigen Bestehens der 

 Gesellschaft. (Freiburg i Br.j Speyer und Kaerner.i 



Insect Pests of Farm, Garden, and Orchard. By 

 E. D wight Sanderson. Second edition, revised an(l 

 enlarged by Prof. L. M. Peairs. Pp. vi+707. (New 

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

 and Hall, Ltd.) 265. net. 



Erratum. — The publishers of G. Spiller's "A New 

 System of Scientific Procedure," included in last 

 week's list, are Messrs. Watts and Co., and not 

 Messrs. Chatto and Windus as stated. 



CONTENTS. PAGE 



British Dyes and Dyestuffs 673 



A War Memorial 675 



The New Medicine . 676 



Non-Ferrous Metallurgy. By E. C 67? 



The Coniidences of Men of Science. By The 



Professor of Biology 677 



Our Bookshelf 678 



Letters to the Editor: — 



Biological Terminology. — Sir G. Archdall Reid, 



K.B.E .680 



Solar Eclipse Results and the Principle of Relativity. — 



C. E. Stromeyer; Sir. F. W. Dyson, F.R.S. 682 

 The Atomic Radius and the lonisation Potential. — 



Prof. Megh Nad Saha . . 682 



American and British Superannuation Systems. — Dr. 



John W. Evans, F.R.S. ; W. Palin Elderton 683 

 A Novel Magneto- Optical Effect. — Prof. J. W. 



McBain 683 



Science and Civilisation. — J. Henderson Smith and 



Major A. G. Church 684 



Bees and Scarlet-Runner Beans. — Harford J. Lowe 684 

 A New Theorem on the Double Pendulum. — H. S. 



Rowell 684 



Ochreous Flint Artefacts from Sheringham. — ^J. Reid 



Moir .... . . . 684 



The Drought and Underground Water. — Bernard 



Hobson . ... 684 



The Application of Interference Methods to 



Astronomy. {lUiislrated.) By H. Spencer Jones 685 

 The Paris Conference of the Museums Associa- 

 tion 688 



Congress on the History of Medicine 690 



Notes 691 



Our Astronomical Column : — 



The August Meteors .... 694 



Search for Meteors from the Pons-Winnecke Radiant 694 



Statistics of Proper Motions . 694 



The Universities and Technological Education. 



By Prof. A. Smithells, F.R S 695 



New Apparatus for Showing the Tracks of a-, P-, 



and X-rays. [Illustrated) 697 



Scientific and other Aspects of Beer . . ... 698 



The Ancient and Modern Inhabitants of Malta . 699 



The Rothamsted Experimental Station 699 



University and Educational Intelligence 700 



Calendar of Scientific Pioneers 701 



Societies and Academies 702 



Books Received 704 



