556 



NATURE 



[December 22, 1921 



Sir Arthur Evans. Vol. i : The NeoUthic and Early 

 and Middle Minoan Ages. Pp. xxiv+721 + 18 plates. 

 (London : Macmillan and Co., jLtd.) 6 guineas net. 



Medical Research Council. Reports of the Indus- 

 trial Fatigue Research Board. No. 12 : Vocational 

 Guidance. (A Review of the Literature.) By B. 

 Muscio. (General Series, No. 4.) Pp. 57. 15. net. 

 No. 15 : Motion Study in Metal Polishing. By E. 

 Farmer and R. S. -Brooke. (Metal Scries, No. 5.) 

 Pp. 65. 2s. net; (London : H.M. Stationery Office.) 



Imperial Institute Map of the Chief Sources of 

 Metals in the British Empire, with Diagrams of 

 Production. Prepared under the direction of the 

 Mineral Resources Committee of the Imperial Insti- 

 tute. 35^" X 44". (London : G. Philip and Son, Ltd.) 

 5s. 6d. net. 



Tierpsychologie. By Prof . Dr. H. E. Ziegler. (Samm- 

 lung Goschen 824.) Pp. 115. (Berlin and Leipzig: 

 W. de Gruyter and Co.) 6 marks. 



The University of Chicago : Publications of the 

 Yerkes Observatory. Vol. 3, Part 3 : The Rotation 

 Period of the Sun as Determined from Measures of 

 Plates taken with the Rumford Spectroheliograph. 

 By Philip Fox. Pp. viii+67-204+plates 24-26. 

 (Chicago: University of Chicago Press; London: 

 Cambridge University Press.) 2.50 dollars net. 



Koninklijk Magnetisch en Meteorologisch Observa- 

 torium te Batavia. Verhandelingen No. 7 : On the 

 Distribution of Earthquakes in the Netherlands East 

 Indian Archipelago, igoq-iqig; with a Discussion of 

 Time Tables. By Dr. S. W. Wisser. Pp. iv+79+3 

 plates. Verhandelingen No. 8 : Het Klimaat van 

 Nederlandsch Indie. (The Climate of the Netherlands 

 Indies.) Deel i (Vol. i) : Algemeene Hoofdstukken 

 (General Chapters), Aflevering t (Part i) (With Eng- 

 lish Summaries). Bv Dr. C. Braak. Pp. viii+64+ 

 18. (Batavia.) 



Department of Scientific and Industrial Research. 

 Bulletin No. i; : The Cleaning and Restoration of 

 Museum Exhibits. Report upon Investigations con- 

 ducted at the British Museum. Pp. 12. (London : 

 H.M. Stationery Office.) 2s. net. 



Department of Scientific and Industrial Research : 

 Fuel Research Board. Technical Paper No. 3 : The 

 Efficiency of Low Temperature Coke in Domestic 

 Appliances. By Dr. M. W. Fishenden. Pp. 35. 

 (London : H.M. Stationery' Office.) gd. net. 



Out West for Thirty Years : Notes of a Ministry 

 in the Real Australia. Bv the Rev. W. Robertson. 

 Pp. X+191. (The Manse, Hay, N.S.W. : The Author.) 



25. 



Die Ratzel des Vogelzuges : Ihre Losung auf Ex- 

 perimentellem Wege durch Aeronautik, Aviatik und 

 Vogelberingung. By F. von Lucanus. Pp. viii+226. 

 (Langensalza : H. Beyer und Sohne.) 30 marks. 



The British Tournal Photographic Almanac and 

 Photographer's Daily Companion, 1922. Edited bv 

 G. E. Brown. 6ist issue. Pp. 820. (London : H. 

 Greenwood and Co., Ltd.) 2s. net. 



Catalogue of the Selous Collection of Big Game 

 In the British Museum (Natural History). By J. G. 

 Dollman. Pp. vIii+112. (London : Longmans, 

 Green and Co.) 75. 6d. 



Thought-Coin. By Bart Kennedy. Pp. x+219. 

 (London : W. Rider and Son, Ltd.) 55. net. 



Main Counts and Calculations. By T. Woodhouse. 

 (Oxford Technical Manuals.) Pp. VIH4-119. (London : 

 H. Frowde and Hodder and Stoughton.) 6s. net. 



Transactions of the Royal Society of Edinburgh. 

 Vol. 52, Part. 4 (No. 33): On Old Red Sandstone 

 Plants showing Structure, from the Rhynie Chert 

 Bed, Aberdeenshire. Part 5 : The Thallophyta Occur- 

 ring In the Peat-Bed, the Succession of the Plants 



NO. 2721, VOL. 108] 



throughout a Vertical Section 01 the Bed, and the 

 Conditions of Accumulation and Preservation of the 

 Deposit. By Dr. R. Kidston and Dr. W. H. Lang. 

 Pp. 855-902 + 10 plates. (Edinburgh: R. Grant and 

 Son ; London : Williams and Norgate.) 13s. 



The Economic Aspects of Geology. By C. K. Leith. 

 Pp. xvi+457. (London : Constable and Co., Ltd.) 

 185. 



A Treatise of Electro-Chemistrv. Edited by B. 

 Blount. The Electro-Metallurgy of" Steel. By C. C. 

 Gow. Pp. xvi + 351. (London ; Constable and Co., 

 Ltd.) 27s. 6fl[. 



The Legacy of Greece. Edited by R. W. Living- 

 stone. Pp. xii+424. (Oxford : Clarendon Press.) 

 7."^. 6d. net. 



Diary of Societies. 



• THURSDAY, December 29. 



RoY.u, iN-STiTUTiojf, at 3.— Prof. J. A. Fleming : Electric Waves 

 and Wireless Telephony : Surface Waves on Liquids. 



iNSTiTriioN OF Automobile Engineehs (at 28 Victoria Streef). at 

 7.30. — Adjourned Discussion on Paper by H. F. L. Orciitt : Motor- 

 car Gear-boxes. 



SATURDAY, December 31. 



RoY.\L In$titltion, at 3. — Prof. J. A. Fleming : Electric Waves 

 and Wireless Telephony : Waves in Air. 



CONTENTS 



PAGE 



Carbon Monoxide in Public Gas Supplies. By 



W. A. B 521 



Diseases of the Rubber Tree {Hevea braziliensis) 



By J. B. F. . . 524 



Some Psychological "As Ifs." By C. LI. M. . . 525 

 Our Bookshelf .... 526 



Letters to the Editor: — 



The Tendency of Elongated Bodies to Set in the East 



and West Direction. — Walter D. Lambert . . 52S 

 Japanese Culture Pearls.— Dr. H. Lyster Jameson 528 

 A Curious Phy-siolosjical Phenomenon. — F. C. 



Dannatt ; Prof. T. Graham Brown . . . 529 



Echinoderm Larvae and their Bearing on Classifica- 

 tion.— Prof. E. W. MacBride, F.R.S.; Dr. 



F. A. Bather, F.R.S. . . 529 



Some Problems in Evolution.— W. R. Bousfield, 



K.C., F.R.S. ; Prof. E. S. Goodrich, F.R.S. 530 

 World List of Scientific Periodicals.— Prof. W. W. 



Watts, F.R.S. ... 531 



Old Observations Bearing on the Duration of Sun- 

 rise.— Dr. Wiliard J. Fisher 531 



The Measurement of lonisation Currents by Three- 

 e'ectrode Valves. {With Diagram.) — ^J. C. M. 



Brentano 532 



Simple Sensitive Flame.s.— G. A. Sutherland ... 532 

 The Message of Science. By Sir Richard Gregory 533 

 Integration in the Living Organism. By Prof. 



W. M. Bayliss, F.R.S 537 



"Leader" Cables for Aircraft - • 53 



War Work of the Bureau of Standards, U.S.A. 



By J. L. H 540 



Obituary: — 



The Right Hon. Lord Lindley, P.C, F.R.S. 541 



Notes ... 542 



Our Astronomical Column : — 



The Markings on Jupiter 547 



The Ultra- Violet Spectrum of o Cygni 547 



The Origin of the Scottish People 548 



An Agricultural Enterprise 549 



Optical Wedges. By C. J 55° 



The South African Association for the Advance- 

 ment of Science. By H. B. F. ^ 55° 



University and Educational Intelligence . . -552 



Calendar of Scientific Pioneers 553 



Societies and Academies 554 



Books Received 555 



Diary of Societies 55° 



i 



