364 

vaporisation to the absolute boiling point was found 
to be 9, or half the experimental value. But using 
the characteristic equation for a gas given by the 
author in 1900, in place of the mVan der Waals 
equation, the Despretz-Trouton constant is 18, in 
exact accord with experiment.—E. Léger : Magnesium 
citrate and the supposed basic magnesium citrates.— 
O. Bailly: The synthesis of o-glycerophosphoric acid. 
Sodium allylphosphate, treated with potassium per- 
manganate, gives the a-glycerophosphate free from 
the B isomer. The solubilities of the calcium, barium, 
and strontium salts were determined.—J. Bergonié : 
The detection, localisation, and extraction of mag- 
netic projectiles by means of the electro-vibrator. A 
summary of the advantages of this method as com- 
pared with the usual surgical operation with the assist- 
ance of the X-rays.—Félix Legueu: Biological re- 
actions in prostatic adenoma. 
BOOKS RECEIVED. 
Catalogue of the Ungulate Mammals in the British 
Museum (Natural History). Vol. iv. By R. 
Lydekker. Pp. xxi+438. (London: British Museum 
(Natural History); Longmans and Co., and others.) 
ros. 6d. 
The Principles of Agriculture through the School 
and the Home Garden. By C. A. Stebbins. | Pp. 
XXVili+ 380. (New York: The Macmillan Company ; 
London: Macmillan and Co., Ltd.) 4s. 6d. net. 
Societal Evolution. By Prof. A. G. Keller. Pp. 
xi+338. (New York: The Macmillan Company ; 
London: Macmillan and Co., Ltd.) 6s. 6d. net. 
A Report on Library Provision and Policy by Prof. 
W. G. S. Adams to the Carnegie United King- 
dom Trustees. Pp. 104. (Edinburgh: Neil and Co.) 
Three-Colour Photography: with Special Reference 
to Three-Colour Printing and Similar Processes. By 
A. Freiherrn von Hiibl. Translated by H. O. Klein. 
Pp. 138. (London: P. Lund, Humphries and Co., 
Ltd.) 
The Material Culture and Social Institutions of the 
Simpler Peoples. By LL. Ue Hebhouses iG: .C: 
Wheeler, and M. Ginsberg. Pp. 299. (London: 
Chapman and Hall, Ltd.) 2s. 6d. net. 
Surveying and Field Work. By J. Williamson. 
Pp. xxii+363. (London: Constable and Co., Ltd.) 
7s. 6d. net. 
Single-Phase Electric Railways. By 
Pp. xiv+303. (London: Constable and Co., 
21s. net. 
La Science Allemande. By Prof. P. Duhem. 
143. (Paris: A. Hermann et Fils.) 
Continuous Current Electrical Engineering. 
W. T. Maccall. Pp. viiit+466. (London: 
Tutorial Press, Ltd.) tos. 6d. 
E. Austin. 
Ltd.) 
Pp. 
By 
University 

DIARY OF SOCIETIES. 
THURSDAY, May 27- 
INSTITUTION OF ELECTRICAL ENGINEERS, at 8.—Annual General Meeting. 
FRIDAY, May 28. 
Roya Instirution, at 9.—Engineering Problems of Mesopotamia and 
Euphrates Valley : Sir John Jackson. 
INSTITUTION OF PETROLEUM TECHNOLOGISTS, at 8.—The Evolution of the 
Oil Tank-ship: H. Barringer. 
Puysicat Society, at 5.—Numerical Relations between Electronic and 
Atomic Constants: Dr. H. S Allen.—A Method of Calculating the 
Absorption Coefficients of Homogeneous X-Radiation: H. Moore. Two 
Experiments Illustrating Novel Properties of the Electron Currents from 
Hot Metals : Prof. O. W. Richardson.—High Permeability in Iron: Prof. 
E. Wilson.~-An Experiment showing the Relative Width of Hydrogen 
and Neon Lines: T. R. Merton. 
SATURDAY, May 20. 
TANNEAN Society, at 3.—Anniversary Meeting. 
MONDAY, May 3:. 
Rovat GEOGRAPHICAL Society, at 8.30.—Geography of the War Theatre 
in the Near East: D. G. Hogarth. 
NO. 2378, VOL. 95] 
NATURE 


[May 27, 1915 
TUESDAY, June x. 
Rovat InsTITUTION, at 3.—The Evolution of Stee!—Influence on 
Civilization; Prof. J. O. Arnold. 
R6nTGEN Society, at 8.15.—Annual General Meeting. 
WEDNESDAY. Juxe 2. 
Society or Pusric ANaLysts, at 8.—The Estimation of Starch in Cocoa 
by the use of Taka Diastase: C. Revis and H. R. Burnett.—The 
Volumetric Estimation of Ferrocyanides: B, Campbell.—Corean Bees- 
wax : Seiichi Ueno.—Determination of B-Naphthol in Lysol and ent 
compounds: R. Bodmer.—The Composition of Dutch Cheese: J. J. L. 
van Ryn. 
ENTOMOLOGICAL Society, at 8. 
THURSDAY, June 3. 
Roya Society, at 4.—/20bable Papers : Svil Protozoa and Soil Bacteria = 
E. J. Russell.—The Chromosome Cycle in Coccidia and Gregarines: C. 
Dobell and A. P. Jameson.—The Influence of Gases on the Emission of 
Electrons and Ions trom Hot Metals: Prof. O. W. Richardson. —The 
Shapes of the Equipotential Surfaces in the Air near Long Buildings or 
Walls, and their Effect on the Measurement of Atmospheric Potential 
Gradients : Prof. C. H. Lees. —The Band Spectrum associated with 
Helium: J. W. Nicholson. 
Roya InstiTuTION, at 3.—Methods of presenting Character in Biography 
and Fiction: Wilfrid Ward. 
FRIDAY, June 4. 
Roya InstiruTion, at 9-—Radiations from Exploding Atoms: Sir E. 
Rutherford. 
Geotoeists’ Association (at University College), at 8.—Lakes and their 
Origin, with Special Reference to Rock-basins: Prof. E. J. Garwood. 

CONTENTS. PAGE 
The Science of Vulcanology. ByJ. W.J. . 337 
Liquids Unmathematically Treated. By G. H, B. 337. 
Insects and Man. By H. M. L. eon eh: 

Culture and Bictaphysies.4 are E. . Crawley. =) ) 4359) 
Our Bookshelf 0 a) erect SOME 
Letters to the Editor :— 
Supposed Horn-Sheaths of an Okapi.—Dr, Cuthbert 
Christy . . 342 
A Further Extension ofthe Spectrum. Prof, Theodore 
Lyman... 343, 
The Distribution of the Electrons i in Atoms. ~Arthur 
H. Compton; Prof. W. H. Bragg, F.R.S.. . 343 
Early Figures of the Remora. eee Fee 
C.R. Eastman .. Rete A - 344 
A Mathematical Paradox.—A. S.E. . - ..h-: - 345 
A Mistaken Wasp.—W. A. Gunn : conde ok 
The Penguinery Re-visited. (Mlustrated.) Bie rts | 
The Antiquity of Hindu Chemistry. By T. .... 347 
The Supply of Optical Glass and Instruments. - 348 
Notes .. Sisalefiie toon + weit rteaee RG aes 
Our Astronomical Column :— 
Comet Tempel 2 . . sive sede, seen me SE 
Observations of Saturn at ‘Flagstaff SOUL och OR, 
The Spectrum of the Inner Corona . . 353 
Spectroscopic Analysis of the N’ Kandhla and other ’ 
Meteoric Irons . . Sita Go war eon 5 A 
Measures of Southern Double Stars... ..... 354 
Measuring Heat from Stars. . . ee ei ey: 
Recent Work in Palzontology. By G. A. af Coleiae »* 354 
The Place of Lavoisier in the pe of Chemistry. 
Bhp IL Iles 6 os is: th eee SOF 
Fishery Research in India, By J. J. Serer ce che is\ 
Ventilation and Health. . pease cei SGV 
The Utilisation of Solar Energy. ‘Uilustrated.) By | 
A. S. E. Ackermann ae De SS 
The Rigid Dynamics of Circling Flight. By Prof. 
G. H. Bryan, F.R.S. 360 
Early Recognition of the Phases of the Planet 
Venus. zs 5 2 gee ROMs 
University and Educational Intelligence PREM yy. joven 21 
SocietiesiandjAcademies” > 2) 35 Semen coe Le 
Books Received MEPEMETI o O56 Oo Ol cKBE oS hee 
Diary, ofsocieties: . .. .\ | - astern ou eee 



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