I04 



NATURE 



[September 1.5, '1921 



found to contain from 1-36 to 8-92 per cent, of oxalate, 

 thus resembling the Eucalypts. — G. F. Hill : Copto- 

 termcs Raffrayi, Wasman (fam. Termitidae). This 

 Termit was described in 1900 from specimens of the 

 soldier caste. From the examination of a nest series 

 of imagines, soldiers, and workers and two series of 

 soldiers and workers the validity of Wasman 's species 

 is now definitely established. 



Books Received. 



Relativity and the Universe : A Popular Introduc- 

 tion into Einstein's Theory of Space and Time. By 

 Dr. H. Schmidt. Authorised translation by Dr. Karl 

 Wichmann. Pp. xiii+136. (London: Methuen and 

 Co., Ltd.) 55. net. 



All About Pets : Told in Stories. Bv Lilian Gask. 

 Pp. 224. (London and Sj'dnev : G. G. Harrap and 

 Co., Ltd.) 6s. net, 



Joe Strong : The Bov Wizard. Bv Vance Barnum. 

 Pp. 189. (London and Sydney : G. G. Harrap and 

 Co., Ltd.) 3s. 6d. net. 



Records of the Botanical Survey of India. Vol. 6, 

 No. 9. Useful Plants of the District of Lakhimpur 

 in Assam. By H. G. Carter and D. N. Carter. 

 Pp. 353-420+ ix. (Calcutta.) i rupee. 



The Carnegie Foundation for the Advancement of 

 Teaching. Bulletin No. 15. Training for the Public 

 Profession of the Law. Historical Development and 

 Principal Contemporary Problems of Legal Education 

 in the United States, with some Account of Condi- 

 tions in England and Canada. By A. Z. Reed. 

 Pp. xviii+4q8. (New York City.) 



Results of Meteorological Observations in the Five 

 Years 1916-20 made at the Radcliffe Observatory, 

 Oxford, under the Direction of Dr. A. A. Rambaut. 

 Vol. 52. Pp. xiii-i-ii;. (Oxford: Humphrey Mil- 

 ford ; London : Oxford University Press.) 



Memoirs of the Geological Survey. Special Reports 

 on the Mineral Resources of Great Britain. Vol. 19. 

 Lead and Zinc Ores in the Carboniferous Rocks of 

 North Wales. By B. Smith. Pp. iv+ 162 + 3 plates. 

 5s. 6d. net. Vol. 21. Lead, Silver-Lead, and Zinc 

 Ores of Cornwall, Devon, and Somerset. By H. 

 Dewev. Pp. iv+72. 2s. 6d. net. (Southampton : 

 Ordnance Survey Office ; London : E. Stanford, Ltd.) 

 Aggregation and Flow of Solids : Being the Records 

 of an Experimental Studv of the Micro-structure and 

 Physical Properties of Solids in Various States of 

 Aggregation, 1900-21. By Sir George Beilby. Pp. 

 xv+256+34 plates. (London : Macmillan and Co., 

 Ltd.) 205. net. 



Edinburgh's Place in Scientific Progress. Prepared 

 for the Edinburgh Meeting of the British Association 

 bv the Local Editorial Committee. Pp. xvi+263. 

 (Edinburgh and London : W. and R. Chambers, Ltd.) 

 65. net. 



Handbuch der biologischen Arbeitsmethoden. Abt. 

 xi., Methoden zur Erforschung der Leistungen des 

 Pflanzenorganismus. Teil 2, Heft i., Lieferung .13 : 

 Soezielle Methoden a/Pflanze. Pp. 186. 54 marks. 

 Abt. v., Methoden zum Studium der Funktionen der 

 Einzelnen Organe des Tierischen Organismus. Teil 3, 

 Hefti., Lieferung 18: Entwicklungsmechanik. Pp. 

 218. 66 marks. Tell -\, Heft ii.,. Lieferung 33 : Ent- 

 wicklungsmechanik. . Pp- 2i9r440. 72 marks. (Berlin 

 und Wien : Urban und Schwarzenberg.) 



Aus dem Archiv der Deutschen • Seewarte. 

 XXXVIIL, Jahrgang, 1920, Nf. 6.. Stromun-gen und 

 Oberfiachentemperat'uren im Golfe von. ^ Guinea. ■ By 

 Dr. T. Janke. Pp. 68+7 tafeln. (Hamburg: Ham. 

 merich und Lesser.) 



NO. 2707, VOL. 108] 



Department pf. Scientific .and .Industrial Research. 

 Report of the Food Investigation Board for the Year 

 X920. Pp. 39. (London :" H.M. Stationery Office.) 

 IS. net. 



Hints to Travellers, Scientific and General. Edited 

 by E. A. Reev6s. Tenth edition, revised and cor- 

 rected. Vol. I : Surveying and Practical Astroiiomy. 

 Pp. XV+470. Vol. 2 : Meteorology, Photography, 

 Geology, Natural History, Anthropology, Industry and 

 Commerce, Archaeology, Medical, etc. Pp. vii+318. 

 (London : Royal Geographical Society.) 2 vols., 21s. 

 net. 



British Labour : Replacement and Conciliation, 

 1914-21. Being the Result of Conferences and In- 

 vestigations by Committees of Section F of the British 

 Association. Part i : On Replacement. Co-ordinated 

 and revised by Miss L. Grier and Miss A. Ashley. 

 Part 2 : On Conciliation. Edited by A. W. Kirkaldy. 

 Pp. xxxv+266. (London : Sir I. Pitman and Sons, 

 Ltd.) los. 6d. net. 



Transactions of the Royal Society of Edinburgh. 

 Vol. 52, part 4 (No. 32). On Old Red Sandstone 

 Plants, showing Structure, from the Rhynie Chert 

 Bed, Aberdeenshire. Part 4 : Restorations of the 

 Vascular Cryptogams, and Discussion of their Bearing 

 on the General Morphology of the Pteridophyta and 

 the Origin of the Organisation of Land Plants. By 

 Dr. R. Kidston and Dr. W. H. Lang. Pp. 831-54+S 

 plates. (Edinburgh : R. Grant and Son ; London : 

 Williams and Norgate.) 6s. 6d. 



Introduction to Textile Chemistrv. By H. Harper. 

 (Life and Work Series.) Pp. ix+189. (London: 

 Macmillan and Co., Ltd.) 3s. 6d. 



CONTENTS. 



PAGE 



Cholera Risks 73 



The Human Factor. Bv J. D 74 



History of Science in Edinburgh . • 75 



An Electronic Theory of Valency. By J. B. C. . 77 



Along the Snow-line of Peru 78 



Our Bookshelf 79 



Letters to the Editor:— 



Uniform Motion in the .Ether,— E. H. Synge ; 



Dr. Harold Jeffreys . • • • ^° 



Relation of the Hydrogen-ion Concentration of 

 the Soil to Plant Distribution. — Dr. W. R. G. 



Atkins '^*-* 



"Smokv" Quartz.— Prof. C. V. Raman .... 81 



Brown Bast and the Rubber Plant.— G. Bryce ; 



The Writer of the Note 81 



The Nature of Vowel Sounds.^Preston Ed- 

 wards ; Prof. E. W. Scripture .82 



The Generation of Heath-fires. — Henry Bury . . 83 

 Life and Mind.— Sesamy •83 

 The Stream of Life. By Prof. Arthur Dendy, 



FRS ... . 4 

 Speech through "the ^ther. By Sir Oliver Lodge, 



•poo .... op 



Variations of Climate since the Ice Age. (/Uus- 



■trated.) By C E. P. Brooks 90 



Obituary: — 



Henry Woodward 93 



Notes . ■••.•• 95 



Our Astronomical Column : — 



The Bright Object of August 7 98 



Einstein's Real Achievement 98 



Nebular Lines in Spectrum of RAquam .... 98 



British Roses and Hybridity • 99 



Geography in Austria. By Prof. Grenville A. J. 



Cole, F.R.S. . . ....... • • 100 



Valence. By T. M. L. . . loi 



University and Educational Intelhgence . . . 102 



Calendar of Scientific Pioneers 103 



Societies and Academies • • • lo3 



Books Received ^°4 



