276 



NATURE 



[May 25, 1916 



The Jpurnal of the Royal Agricultural Society of 

 England. \'ol. Ixxvi. Pp. 8 + 364. (London: John 

 Murray.) los. 



The Microscopy of \'egetable Foods. Bv Dr. A. L. 

 Winton, Prof. /. Moeller, and Dr. K. B. Winton. 

 Second edition. Pp. xiv + 701. (New York: J. Wiley 

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

 2-]s. 6d. net. 



Sewerage : The Designing, Construction, and Main- 

 tenance of Sevveratre Systems. By A. P. Folwell. 

 Seventh edition. Pp. x + 540. (New York: J. Wiley 

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

 12s. 6d. net. 



The Journal of the South African Ornithologists' 

 L'nion. Vol. xi., No. i. December, 1915. Pp. 118. 

 (Pretoria ; London : Witherby and Co.) ys. 



The Nestorian Monument in China. By Prof. P. Y. 

 Saeki. Pp. x + 342. (London: S.P.C.K.) 105. 6d. 

 net. 



Text-Book of Mechanics. By Prof. L. A. Martin, 

 jun. Vol. vi., Thermodynarnics. Pp. xviii + 313. 

 (New York : J. Wiley and Sons', Inc. ; London : Chap- 

 man and Hall, Ltd.) 75. 6d. net. 



Geodetic Surveying. By Prof. E. R. Cary. Pp. 

 ix + 279. (New York: J. Wiley and Sons, Inc!^; Lon- 

 don : Chapman and Hall, Ltd.) 105. 6d. net. 



Interpolated Six-place Tables of the Logarithms of 

 Numbers and the Natural and Logarithmic Trigono- 

 metric Functions. Edited by H. W. Marsh. Pp. 

 xii+155. (New York: J. Wiley and Sons, Inc.; Lon- 

 don : Chapman and Hall, Ltd.) 5^. 6d. net. 



The Thermodynamic Properties of Ammonia. By 

 F. G. Keyes and R. B. Brownlee. Pp. V4-73. (New 

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

 and Hall, Ltd.) 45. 6d. net. 



The Universal Mind and the Great War. Bv E. 

 Drake. Pp. vi+ioo. (London: C. W. Daniel, Ltd.) 

 25. 6d. net. 



Methods in Practical Petrology. By H. B. Milner 

 and G. M. Part. Pp. vii + 68. (Cambridge: W. 

 HeflFer and Sons, Ltd.) 25. 6d. net. 



Record of a Prehistoric Industry in Tabular Flint at 

 Brambridge and Highfield, near Southampton. By 

 R. E. Nicholas. Pp. 92. (Southampton : Toogood 

 and Sons.) 



Alfred Russel Wallace : Letters and Reminiscences. 

 By J. Marchant. Vol. i., pp. xi + 320. Vol. ii., pp. 

 vi + 291. (London: Cassell and Co., Ltd.) 255. net. 



The Design of Aeroplanes. By A. W. Judge. Pp. 

 viii + 212. (London: Whittaker and Co.) 95. net. 



The Small Grains. By M. A. Carleton. Pp. xxxil + 

 699. (New York : The Macmillan Co. ; London : Mac- 

 millan and Co., Ltd.) ys. 6d. net. 



Steering by the Stars : for Night-flying, Night- 

 marching, and Night Boat-work between Latitudes 

 40° N. and 60° N. Bv Dr. J. D. White. Pp. 32. 

 (London : J. D. Potter.) 15, 



Tunbridge Wells and Neighbourhood : A Chronicle 

 of the Town from 1608 to 1915. Bv H. R. Knipe. 

 Pp. 207. (Tunbridge Wells : Pelton.) 

 ♦ 



DIARY OF SOCIETIES. 



THURSDA V, May 25. 



Royal Society, at 4.30. — Bakerian Lecture : X-Rays and the Theory of 

 Radiation : Prof. C. G. Barkla. 



Royal Institution, at 3.— The Beginnings of the Orchestra and its Instru- 

 mental Combinations : Sir Alexander Mackenzie. 



Optical Society, at 8. — Snnds used in G'ass-making, with Especial Refer- 

 ence to Optical Glass : Dr. P. G. H. Boswell. 



FRTDAY, May 26. 

 Royal Institution, at 5.30.— X-Rays : Prof. C. G. Barkla. 

 Physical Society, at 5. — 1 he Correction of Chromatic Aberrations when 



NO. 2430, VOL. 97] 



the External Media are Dispersive : T. Smith.— Note on the Use of the 



Auto-collimating Telescope in the Measurement of Angles: J. Guild. — 

 The Vi>cosity of Colloidal Solutions : E. Hatschek. 



SATURDAY, May 27. 

 KovAL Institution, at 3. — The Finance of the Great War : Prof H. S. 

 Fox well. 



TUESDAY, Mav 30. 



Royal Institution, at 3. — Optical Research and Chemic.1l Progress : 

 Dr. T. M. Lowry. 



THURSDAY, June i. 



Royal .Society, at 4.30. — Probable Papers: The Scattering of Plane 

 fc-Iectric Waves by Spheres : Dr. T. J. I 'a Bromwich. — Numerical Results 

 of the Theory of the Diffraction of a Plane Electromagnetic Wave by a 

 perfectly conducting Sphere : J. Proudman, A. T. Doodson, and 

 G. Kennedy. — Motion of Solids in Fluids when the Flow is not Irrota- 

 tional : G. I. 'I'aylor. 



Royal Institution, at 3.— Chamber Music audits 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. 



FRIDAY, June 2. 

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



du Droit : Lieut. P. H. Loyson. 

 Geolcx-,ists' Association, at 7. — The Petrology of the North Sea Drift 



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



Phenomena in Egypt : Mpry S. Johnston. 



SA TURDA Y, June 3. 

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

 Frazer. 



CONTENTS. PAGE 



Chemistry for Students and General Readers. By 



T. M. L 257 



Wireless Transmission of Photographs. ByE. E. F. 258 



Electrical Engineering Manuals. By D. R. ... 258 



An American Gardening Book. By J. B. F. ... 259 



Our Bookshelf 259 



Letters to the Editor: — 



"Summer Time" and Meteorology. — Major E. 



Gold; Major H. G. Lyons, F.K.S 260 



Geologists and Special Constables. — Prof. T. G. 



Bonney, F.R.S. 260 



National Food Supply and Nutritional Value. — Prof. 

 W. H. Thompson ; " The Writer of the 



Article" . . 261 



The Lowei Greensand Flora. — Dr. Marie C. Stopes ; 



A. C. S. 261 



Meteorological Conditions of a Blizzard. — Arthur E. 



Bostwick . 261 



The Routledge Expedition to Easter Island. By 



E. N. Fallaize 261 



The British Science Guild 263 



Notes 264 



Our Astronomical Column :— 



Comet or Nebulous Minor Planet? ........ 268 



The Pole Effect in the Calcium Arc . 268 



The Rotation of Nebulas 268 



National Defence and Development in the United 



States 268 



The Peat Industries of Wisconsin 269 



The Oxidation of Drying-oils. By T. M. L. ... 269 

 Industrial Research in the United States. By 



A. P. M. Fleming 270 



University and Educational Intelligence 272 



Societies and Academies 273 



Books Received . 275 



Diary of Societies 276 



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