296 



NATURE 



[June i, 1916 



— p. Ganbert : Circular polarisation produced by 

 «pherolites. — A. Guebhard : The age of the upper con- 

 glomerates of the region of Castellane (Basses-Alpes) 

 in its relations with the alpine foldings.— Mile. S. 

 Coemme : A new method of reproduction of the parti- 

 tions of Ammonites. 



BOOKS RECEIVED. 



Bulletin of the Museum of Comparative Zoology at 

 Harvard College. Vol. Ix., No. 6. Results of the 

 Yale Peruvian Expedition of 191 1. The Arachnida. 

 By R. V. Chamberlin. (Cambridge, Mass.) 



Preliminary Report on the Botanical Results of the 

 Danish Expedition to Siam (1899-1900). Flora of Koh 

 Chang. By Johs. Schmidt. Part x. (Copenhagen : 

 Bianco Luno.) 



Annals of the Durban Museum. Vol. i., part 3. 

 (Durban.) 5s. net. 



Journal of the Royal Statistical Society. Vol. Ixxix., 

 part 2, March. (London.) 5s. 



Transactions of the Royal Society of South Africa. 

 Vol. v., part 4. Pp. 273-564. (Cape Town.) 12$. 6d. 



Mentally Deficient Children : their Treatment and 

 Training. By Drs. G. E. Shuttlevvorth and W. A. 

 Potts. Fourth, edition. Pp. xix+284. (London: 

 H. K. Lewis and Co., Ltd.) 7s. 6d. net. 



More Minor Horrors. By Dr. A. E. Shipley. Pp. 

 xiv+ 163. (London : Smith, Elder and Co.) is. 6d. 

 net. 



Newsholme's School Hygiene : the Laws of Health 

 in relation to School Life. By Dr. J. Kerr. Pp. 352. 

 New edition. (London : G. Allen and L^nwin, Ltd.) 

 45. 6d. net. 



The Forty-fourth Annual Report of the Board of 

 Directors of the Zoological Society of Philadelphia. 

 Pp. 53. (Philadelphia, Pa.) 



A Generation of Religious Prog^ress. Edited by G. 

 Spiller. Pp. 151. (London : Watts and Co.) is. 

 net. 



A Senior Experimental Chemistry. By Dr. A. E. 

 Dunstan and Dr. F. B. Thole. Pp. xiii + 522. (Lon- 

 don : Methuen and Co., Ltd.) 5s. 



The Geology of the Lake District and the Scenery 

 as Influenced by Geological Structure. By Dr. J. E. 

 Marr. Pp. xii + 220. (Cambridge: At the University 

 Press.) 12S. net. 



DIARY OF SOCIETIES. 



THURSDAY, June i. 



Royal Society, at 4.30.— The Transmission of Electric Waves around the 

 P^arth's Surface : Prof. H. M Macdonald. — A Critical Study of Spectral 

 Series. IV. The Structure of Srark Spectra: Prof. W. M. Hicks.— 

 Periodic pisturban< e of Level arising from the Load of Neighbouring 

 Oceanic Tides : K. Terazawa. — ^^T he Use of Partly Neutralised Mixtures 

 of Acids as Hvdrion Regulators: E. B. R. Prideaux. — The Fossil Floras 

 of the Coal Measures of South Staffordshire : Dr. E. A. N. Arber. 



Rqyal Institution, at 3.— Chamber Music and its Revival in England : 

 Sir Alexander Mackenzie. 



Royal Society of Arts, at 4.30. — The Work of the Imperial Institute for 

 India : Prof. W. R. Dunstan. 



LiNNEAN Society, at 5.— New Types of Fossil Characeae from the Purbeck 

 Reds: Clement Reid and J. Groves. — The Structure of the Vertebral 

 Column in the Anura Phaneroglossa and its Importance as a Basis of 

 Classifiration : Prof. G. E. Nicholls.— Variation in Mniura: Prof. Julius 

 MacLeod. — A New Species of Bennettites : Dr. Marie Slopes. 



FRIDAY, June 2. 

 Royal Institution, at 5.30. — La France dans I'Histoire comme Champion 



du Droit : Lieut. P. H. Loyson. 

 Geologists' Association, at 7. — The Petrology of the North Sea Drifl 



and Suffolk _ Brick-earths : Dr. P. G. H. Boswell. — Notes on Erosion 



Phenomena in Egypt : Mary S. Johnston. 



SATURDAY, June 3. 

 Royal Institution, at 3. — Folk-lore in the Old Testament : Sir J. G. 



Frazer. 



MONO A Y, June 5. 

 Royal Geographical Society, at 8.30. — Further Explorations in Central 



Asia : Sit Aiirel Stein. 

 Aristotelian Society, at 8 — The Nature of Judgment : E. H. Strange. 

 Society of Chemical Industry, at 8. 

 Victoria Institute, at 4.30.— The Tides, with Special Reference to their 



Effects around the British Isles : Prof. E. Hull. 



NO. 2431, VOL. 97] 



TUESDAY, June 6. 

 Royal Institution, at 3. — Optical Research and Chemicil Progress : 



Dr. 1". M. Lowry. 

 Zoological Society, at 5.^30. — Discussion : The Results Published in the 



" Biologia-Centrali-Americana," vrith Special Reference to the Zoo- 



feographical Relations between America and Africa — Opened by Dr. F. 

 )u Cane Godman, followed by Dr. -A. Smith Woodward, Dr. H. Gadow, 

 C. Tate Regan, R. I. Pocock, and Dr. C. W . Andrews. 

 Rontgen Society, at 8.15. — Annual Meeting. — Homogeneity of Visible 

 Radiation: Prof. J. VV. Nicholson. 



WEDNESDAY, June 7. 



Society of Public .'Vnalysts, at 8. — Determination of the Reichert and 

 Polenskc Figures of Butter and .Margarine, using Small Quantities of the 

 Fat: A. Douglas Hey wood. —P tash and other Mineral Fertihsers and 

 Constituents of Plants : R. R. Tatlock and R. T. Thomson. — Estimation 

 of Acetone in the Presence of Ethyl Alcohol : Jitendranath Rakshit. 



Gbological Society, at 5.30. 



Entomological Society, at 8.^ — Certain Forms of Acraed from Madagascar : 

 A Reply to M. Oberthiir : Dr. H. Eltringham. 



THURSDAY, June 8. 

 Royal Society, at 4.30. 

 Royal Institution, at 3. — Chamber Music and its Revival in England : 



Sir Alexander Mackenzie. 

 Institution of Mining Engineers, at 10.45 ^-"i- — The History of the 



Safety-Lamp : Prof F. W. Hardwick.— The Health of Old Cobiers : Dr. 



J. S. Haldane. — The Estimation of Moisture in Coal : T. F. Winraill. — 



(i) The Absorption of 0.\ygen by Coal. VIII. and IX. ; (2) The Oxidation 



of Pyrites : T. F. Winmill. 

 Optical Society, at 8.— Modern Technical Applications of Radium and 



other Luminous Substances : F. Harrison Glew. 



FRIDAY, June 9. 



Royal Institution, at 5.30. — Eyesight and the War: Dr. E. Clarke. 



Royal Astronomical Society, at 5. 



Malacological Society, at 8. — Note on Erato guttula^aw. : J. R. le B. 

 Tomlin.— An Undescribed Ammonoid from the Lower Greensand (.^ptian) 

 of Kent : G. C. CxxcV.— Helix scytodes : Prof. G. K. Gude. 



SATURDAY, June 10. 

 Royal Institution, at 3. — Folk-lore in the Old Testament: Sir J. G. 

 Frazer. . 



CONTENTS. PACK 



Apple-growing for Profit. By F. K 277 



Thermodynamic Chemistry. By Dr. Francis W.Gray 277 



Applied Mechanics 278 



Our Bookshelf 279 



Letters to the Editor:— 



Meteorological Conditions of a Blizzard. — W. H. 



Dines, F.R.S. 280 



EconoQiic Work of the Geological Surveys. — Prof. 



Grenville A. J. Cole 280 



Antarctic Physiography. [Ilhisirated.) 280 



Ptolemy's Catalogue of Stars. By J. L. E. D. . . 282 



Prof. H. C. Jones. By J. W 2S3 



Notes 283 



Our Astronomical Column :— 



Large Daylight Fireball on May 20 288 



Comet 19163 (Wolf), 1916 ZK (Planet) 288 



A Possible New Comet 289 



Venus 289 



Meteorological and Magnetic Autographs. By 



W. W. B. . 289 



Researches on Hops. By E. S. S 290 



"Tropisms" ... 290 



Studies in Mendelism 291 



Effect of Temperature on Soils 291 



The Search for New Coal-fields in England. {Illus- 

 trated.) By Dr. A. Strahan, F.R.S 292 



Electrical Methods in Surgical Advance. By Sir 



James Mackenzie Davidson 294 



University and Educational Intelligence 295 



Societies and Academies 295 



Books Received 296 



Diary of Societies 296 



Editorial and Publishing Offices : 



MACMILLAN & CO., Ltd., 



ST. MARTIN'S STREET. LONDON, W.C. 



Advertisements and business letters to be addressed to the 

 Publishers. 



Editorial Communications to the Editor. 

 Telegraphic Address : Phusis, London. 

 Telephone Number : Gsrrard 8830. 



