;8o 



NATURE 



[July 5, 19 17 



high plateau and of Lhe eastern Cordillera stood at 

 sea-level in the late Tertiary. — W. H. Bucher : Large 

 current-ripples as indicators of palajogeography. A 

 study oi the Cincinnati anticline. — E. C. MatDowell : 

 The bearing of selection experiments with Drosophila 

 upon the frequency of germinal changes. A study of 

 extra bristles indicates that they are primarily occa- 

 sioned by one germinal unit, and that no change of 

 evolutionary or practical significance has occurred 

 during fifty generations. — S. Taber : Pressure pheno- 

 mena accompanying the growth of crystals. Many 

 phenomena connected with the metamorphism of 

 rocks, the growth of concretions, and the formation 

 of mineral deposits are difficult to explain under any 

 other hypothesis than that growing crystals have 

 made room for themselves by exerting pressure on the 

 surrounding material. — T. B. Johnson and A. A. 

 Ticknor : A new method of transforming esters of 

 G-amino-acids into their corresponding isothiocyanates. 

 — W. G. Foye : The geology of the Fiji Islands. It 

 cannot be said that the modern reefs of Fiji fully 

 support Darwin's theory. — D. F. Jones : Dominance 

 of linked factors as a means of accounting for 

 heterosis. — E. F. Smith : Chemically Induced crown- 

 galls. Small tum:>urs have been produced by the 

 application of various chemicals. — G. D. Birkholl : 

 Dynamical systems with two degrees of freedom. 



BOOKS RECEIVED. 



Transactions of the Royal Society of Edinburgh. 

 Vol. li., part ii. Session 1915-16. Vol li,, part iii. 

 Sessions 1915-16-17. (Edinburgh : R. Grant and 

 Son.) 33s. and 35s. 



Modern Man and his Forerunners. By H. G. F. 

 Spurrell. Pp. xi+192. (London: G. Bell and Sons, 

 Ltd.) 75. 6d. net. 



A Year of Costa Rican Natural History. By A. S. 

 Calvert and P. P. Calvert. Pp. xix+577. (New 

 York : The Macmillan Co. ; London : Macmillan and 

 Co., Ltd.) 125, 6d. net. 



Microscopic Analysis of Cattle-foods. By T. N. 

 Morris. Pp. viii+74. (Cambridge: At the University 

 Press.) 2s. net. 



The Biology of Dragonflies. By R. J. Tillyard. 

 Pp. xi + 396. (Cambridge: At the University Press.) 

 155. net. 



Fossil Plants : a Text-book for Students of Botany 

 and Geology. By Prof. A. C. Seward. Vol. iii. 

 Pp. xviii + 656. (Cambridge : At the University Press.) 

 185. net. 



Explosives. By A. Marshall. Second edition. Vol. 

 ii. Properties and Tests. Pp. ix+4ii to 795. (Lon- 

 don : J. and A. Churchill.) 3Z. 35. net two vols. 



The Statesman's Year Book, 1917. Edited by Dr. 

 J. Scott Keltie, assisted by Dr. M. Epstein. Pp. xllv + 

 1504 + 4 plates. (London : Macmillan and Co., Ltd.) 

 125. 6d. net. 



The Standard Cvclopaedia of Horticulture. By 

 L. H. Bailey. VoL vi., S-Z. Pp. v+3043 to 3639 + 

 plates. (New York : The Macmillan Co. ; London : 

 Macmillan and Co.. Ltd.) 255. net. 



Health and the State. Bt Dr. W. A. Brend. Pp. 

 xi + 354. (London : Constable and Co., Ltd.) 105. 6d. 

 • net. 



PractlcaL Chemistry for Medical Students. By Dr. 

 A. C. Gumming. Second edition. Pp. 8+165. (Edin- 

 burgh : J. Thin.) 



How to Know the Ferns. By S. L. Bastln. Pp. 

 viii+136. (London: Methuen and Co., Ltd.) 15. 6d. 

 net. 



Farm Forestrv. By Prof. J. A. Ferguson. Pp. viii+ 

 241. (New York : J. Wiley and Sons, Inc. ; London : 

 Chapman and Hall, Ltd.) 65. net. 

 NO. 2488, VOL. 99] 



Introduction to the Rarer Elements. By Dr. P. E. 

 Browning. Fourth edition. Pp. x + 250. (New- 

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

 and Hail, Ltd.f 7s. net. 



Steam Turbines. By J. A. Moyer. Third edition. 

 Pp. xI+468. (New York: J. Wiley and Sons, Inc.; 

 London: Chapman and Hall,. Ltd.) 165, 6d. net. 



A Bibliography of British Ornithology from the 

 Earliest Times to the End of 1912. By W. H. Mullens 

 and H. Kirke Swann. Part vi. (London : Macmillan 

 and Co., Ltd.) 6s. net. 



Researches of the Department of Terrestrial Mag- 

 netism. Part HI. Oceanic Magnetic Observations, 

 1965-16, and Reports on Special Researches. By L. A. 

 Bauer and others. Pp. viI+447. (Washington : Car- 

 negie Institution.) 



The Human Worth of Rigorous Thinking. By 

 Prof. C. J. Keyser. Pp. 314. (New York : Columbia 

 University Press ; London : H. Milford.) 



Soil Conditions and Plant Growth. By Dr. E. J. 

 Russell. Third edition. Pp. vIii + 243 + diagrams. 

 (London : Longmans and Co.) 65. 6d. net. 



DIARY OF SOCIETIES. 



FRIDAY, July 6. 

 Geologist,s' Association, at 7.3o-— Notes on Volcanic Phenomena in 

 New Zealand : Miss M. S. Johnston.— Flint-working Sites in the Sub- 

 merged Forest of Carmarthen Bay: A. L. Leach. 



CONTENTS. PAGE 



The Classical System of Education. By Sir E. A. 



SchSfer, F.R.S 3^1 



Applied Chemistry in the United States 362 



War Medicine and Surgery. By R. T. H 363 



Our Bookshelf 3^4 



Letters to the Editor: — 



The Radiation of the Stars.— J. H. Jeans, F.R.S. ; 



Prof. A. S. Eddington, F.R.S 3^5 



Protection from Glare.— L. C. Martin ... 365 

 Electric Discharge from Scythe. — Charles E. 



Benham . . . • • 3^6 



The Future of Education, By Prof. J. B. Farmer, 



F.R.S. 367 



The Work of the Ministry of Munitions 369 



Dr. Robert Bell, F.R.S 37° 



Notes 370 



Our Astronomical Column : — 



Comet 19163 (Wolf) • 375 



Comet 1917a (Mellish) 375 



Comet 1917/^ (Schaumasse) 375 



Rotation in Planetary Nebulas . . 375 



The Use of Zirconia as a Refractory Material ... 375 



Hydro-geology in the United States. By B. C. . . 376 



Science and Industry • • • 37^ 



The American Association.— Stanford Meeting of 



the Pacific Division 377 



University and Educational Intelligence 37^ 



Societies and Academies ...... P^ 



Books Received 3^° 



Diary of Societies 3^0 ■ 



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