280 
NATURE 
[May 6, 1915 

radioscopic method for the localisation of projectiles.— 
H. Morize; The determination of the position of pro- 
jectiles in the human body by radioscopy. Remarks 
on a note by Dr. Foveau de Courmelles (January 18) 
on the same subject.—Mare de Selys Longchamps : 
Autotomy and regeneration of the viscera in Poly- 
carpa tenera.—Lucien Semichon:; The use of heat for 
fighting insects and parasitic cryptogams in cultivated 
plants. Hot water may be used provided its tempera- 
ture does not exceed 70° to 75° C. Details are given 
of the temperatures required to kill various forms of 
mould and larval pests.—Em. Bourquelot, \. Bridel, 
and A. Aubry: The biochemical synthesis of the 
B-mono-d-galactoside of ethylene glycol. The synthesis 
was effected with the aid of emulsin. 
BOOKS RECEIVED. 
Morale fondée sur les Lois de la Nature. Cinquieme 
et Sixiéme Mille. By M. Deshumbert. Pp. tor. 

(London: Watts and Co.) 
Proceedings of the Royal Society of Edinburgh. 
Session 1914-15. Part 1. Pp. 112. (Edinburgh: R. 
Grant and Son.) 
A Study of Prolonged Fasting. By F. G. Benedict. 
Pp. 416. (Washington, D.C.: Carnegie Institution.) 
The Water-Relation between Plant and Soil. By 
B. E. Livingston and I. A. Hawkins. The Water- 
Supplying Power of the Soil as Indicated by Osmo- 
meters. By H. E. Pulling and B. E. Livingston. 
Pp. 84. (Washington, Dic: Carnegie Institution.) 
The Absorption Spectra of Balaton as Studied by 
Means of the Radiomicrometer. By H. C soe and 
Collaborators. Pp. 202. (Washington, D.C.: Car- 
negie Institution.) 
Joseph Pennell’s 
Plates xl+ Notes. 
net. 
Pictures in the Land of Temples. 
(London: W. Heinemann.) 5s. 

DIARY OF SOCIETIES. 
THURSDAY, May 6. 
Roya Society, at 4.30.—Some Problems Illustrating the Forms of Nebulz : 
G. W. Walker.—Observations on the Resonance Radiation of Sodium 
Vapour: Hon. R. J. Strutt.—-Local Differences of Pressure near an 
Obstacle in Oscillating Water: Hertha Ayrton. 
Rover INSTITUTION, at 3.—Advances in General Physics: Prof. A. W. 
orter. 
Rovat Society oF ARTS, at 4.30.—Constantin Meunier et les Sculpteurs 
Belges de son Temps: M. Paul Lambotte. 
LINNEAN SOCIETY, at 5.—Some Bird Problems : W. Percival Westell.—The 
Brown Seaweeds of the Salt-marsh: II.: Dr. Sarah M. Baker and Miss 
M. H. Bohling.—A Collection of Borneo Mosses made by the Rev. C. H. 
Binstead : H. N. Dixon.—Photographs of a Curiously-grown Tree from a 
Tunbridge Wells Garden: Rev. T. R. R. Stebbing. 
FRIDAY, May 7. 
Royat InstTITUTION, at 9.—Electrons and Heat: Prof. O. W. Richardson. 
Geotoeists' AssociaTion, at 8.—Radio-activity and the Measurement of 
Geological Time : A. Holmes. 
SATURDAY, May 8. 
Roya. INSTITUTION, at 3.—Photo-Electricity : Prof. J. A. Fleming. 
MONDAY, May xo. 
Roya. Society oF Arts, at 8.—Foodstuffs: Dr. D.Sommerville. 
TUESDAY, May tt. 
Roya InstITUTION, at 3.—The Animal Spirits : Prof. C. S. Sherrington. 
ZOOLOGICAL Society, at 5.30.—The House-fly Campaign: Prof. H. 
Maxwell Lefroy.—Minchinia: A Haplosporidian: Mrs. Helen L. M. 
Pixell-Goodrich.—The Head Cavities and Development of the Eye 
Musclesin 77ichesurus vulpecula, with Notes on some other Marsupials: 
Miss Elizabeth A. Fraser.—(1) The Organ of Jacobson and its Relations in 
the ‘‘Insectivora.” II.: Talpa, Centetes, and Chyrsochloris ; (2) The 
Anomodont Genera Pristerodon, and Tropidostoma: Dr. R. Broom. 
Society oF ENGINEERS, at 7.30.—Some Future Developments in Heating 
and Ventilation; A. H. Barker. 
WEDNESDAY, May 12. 
Rovat Society oF Arts, at 8.—Recent Progress in Pyrometry: C. R. 
Darling. 
INSTITUTE OF METALs, at 8.30.—The Passage of Electricity through 
Metals: Sir J. J. Thomson, O.M. 
Grotocicat Society, at 8.—Parka decipiens: Dr. G. Hickling and 
A. W. R. Don. 
THURSDAY, May 13. 
Rovat Society, at 4.—Election of Fellows. At 4.30.—Probable Papers: 
The Development of the Thymus, Epithelial Bodies and Thyroid in the 
Vulpine Phalanger (777chosurus vulpecula): Elizabeth A. Fraser and 
Prof. J. P. Hill_—Some Observations on the Development of the Thymus, 
Epithelial Bodies and Thyroid in Phascolarctos, Phascolomys and 
Perameles: Elizabeth A. Fraser.—Measurement of the Specific Heat 
NO. 2375, VOL. 95| 


of Steam at Atmospheric Pressure and 104°5° C., with a-Preface by Prof. 
H. L. Callendar. —Thermal Properties of Carbonic Acid at Low Tem- 
peratures. II.: C. F. Jenkin and D. R. Pye. 
Roya INSTITUTION, at 3.—Tne Movements and Activities of Plants: 
Prof. V. H. Blackman. 
Roya Society OF ARTS, at 4.30.—Indian Trade and the War: Sir C. H. 
Armstrong. 
Iron AND STEEL. INSTITUTE, at 10.30.—A Selection of : Diffusion of Carbon 
in Iron: F. W. Adams. —Supplementary Notes on the Forms in which 
Sulphides may exist in Steel Ingots, II.: Prof. J. O. Arnold and G. R- 
Bol-over.—Researches on Iron, Silicon and Carbon Alloys: G. Charpy 
and A. Cornu.—Corrosion of Iron in Aqueous Solutions of Inorganic 
Salts: Dr. J. A. Newton Friend and P. C. Barnet.—(r) Relative Corro- 
dibilities of Gray Cast Iron and Sel (2) Note on the Removal of Rust 
by means'of Chemical Reagents : J. A. Newton Friend and C. W. 
Marshall.—Communication on the vtiecine of an Open-hearth Furnace 
by means of Tar: Dr. A. Greiner.—Sound Steel Ingots and Rails: Sir 
R. A. Hadfield and Dr. G. K. Burgess.—The Nature of the Ag ‘Irans- 
formation in Iron: K. Honda.—Brinell Hardness and Tenacity Factors 
of aseries of Heat-treated Special Steels; Dr. A. McWilliam and E. J, 
Barnes.—Thermo-electric Properties of Special Steels: A. M. Portevin 
and E. L. Dupuy.—Stress-strain Loops for Steel in the Cyclic State : Dr. 
J. H. Smith and G. A. Wedgwood.—Detection of Burning in Steel, and 
Iron, Carbon, and Phosphorus: Dr. J. E. Stead. 
FRIDAY, May 14. 
Roya InsTITUTION, at 9.—The Archives of Westminster Abbey: Rey. 
E. H. Pearce. 
IRON AND STEEL INSTITUTE, at 10.30.—A Selection of Papers mentioned 
above. 
Roya ASTRONOMICAL SOCIETY, at 5. 
INSTITUTION OF MECHANICAL ENGINEERS, at 8.—The Distribution of 
Heat in the Cylinder of a Gas-engine: Prof. A. H. Gibson and W. J. 
Walker. 
MALACOLOGICAL Society, at 8.—A Dibranchiate Cephalopod (Plesioteuthis) 
from the Lithographic Stone of Bavaria: G. C. Crick.—Description of a 
New Species of Zingis from British South West Africa: J. R. le B 
‘Yomlin.—Diagnosis of a New Species of Dyakia: G. K. Gude. 
SATURDAY, May 1s. 
Roya INsTITUTION, at 3.—Advances in the Study of Radio-active Bodies : 
Prof. F. Soddy. 

CONTENTS. PAGE 
The Technology of Illumination ........ . 253 
Plant Life in Iceland and Cyprus .. . abn Bx 
Prime Numbers and the Complex Variable, By 
GeByaM.. ron) 
Farm Management and Rural Improvement DRerns 
dieses ot Paysite a hove arc y tree sits has aon aa 
Our Bookshelf ... PRE rs chou cee Oyo“) 
Letters to the Editor :— 
The Age of the Earth.—C. E. Stromeyer. ... 
Man’s True Thermal Environment. Taare Robert 
Milne . 
The Australian Antarctic Expedition. 
By Jove Gan = 
Recording Rain Gauges. 
Robert Mill . 
Insect Pests and War. (ittustrated.) By Dr. H. B. 
Fantham. . bhai NS Sy gree 
The Supply of Optical Glass . etieikoumensc) te: = sacra 
Asphyxiating Gases in Warfare .. . orhaaite 
Chemical Standards for Whisky. By C. Si ee 
Niotesiy-g i Sg cia sic) fetta Ch 
Our Astronomical Column :— 
Comet 19152 (Mellish) . . . 9. «5 2 2 - 3 = 
Orbit of Jupiter’s Ninth Satellite soy cater snc to a 
The Satellites of Uranus 
The Greenwich Section of the Astrographic Catalogue 
Recent Papers in the ‘‘ Astronomische Nachrichten ” 
Smithsonian Institution Explorations. (//ustrated.) 
Recent Work on Vertebrate Palzontology. By 
RL © Rar Gr cc 
The United States Bureau of Standards ..... 
University and Educational Intelligence ..... 
Societiestand Academics) 2) <-) seen ns n= 
Books)Receiveds <7). ...0:.  sWicnieieeinam- Ve mk om 
Diarysotgsocieties |... | ty asucee aL 
254 
256 
257 
258 
259 
260 
” (Uustrated. ) 
ewo slo to Hem 
(Utustrated.) By Dr. Hugh 
262 
265 
266 
267 
268 
269 
274 
274 
274 
274 
274 
275 
276 
277 
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280 
280 


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