56 NATURE 
Georges Claude: The maintenance of temperatures | 
about —211° C. by the use of liquid nitrogen. An 
admission of priority to Sir James Dewar.—R. 
Swyngedauw : The integration of the equation giving 
the distribution of the density of an alternating cur- 
rent in cylindrical conductors.—P. Th. Muller and R. 
Romann: The dissociation of good electrolytes and the 
law of mass action.—J. Bougault: The isomerisation 
of the a-hydroxy #y-unsaturated acids into y-ketonic 
acids. The views of Fittig, Thiele, and Erlenmeyer 
on this well-known isomeric chatge are discussed. 
The author puts forward experimental evidence in 
favour of the following simplified scheme :— 
R.CH=CH.CH(OH).CO,H—> 
R.CH(OH).CH=CH.CO,H—> 
R.CO.CH,.CH..CO,H. 
—Em. Bourquelot and M. Bridel: The biochemical 
synthesis of glucosides of polyvalent alcohols; the 
a-glucosides of glycerol and glycol.—Stanislas Meunier : 
An unrecognised point in the fossilisation of organic 
débris. 
BOOKS RECEIVED. 
Research in China. (In three volumes and Atlas.) 
Vol. iii. : The Cambrian Faunas of China, by C. D. 
Walcott. A Report on Ordovician Fossils collected 
in Eastern Asia in 1903-04, by S. Weller. A Report 
on Upper Paleozoic Fossils collected in China in 1903— 
o4, by G. H. Girty. Pp. vii+375. (Washington, 
U.S.A.: Carnegie Institution.) 
The Infinitive in Anglo-Saxon. By Prof. M. 
Callaway, Jr. Pp. xiii+339. (Washington, U.S.A.: 
Carnegie Institution.) 
Botanical Features of the Algerian 
W. A. Cannon. Pp. vi+81+36 plates. 
U.S.A.: Carnegie Institution.) 
The Diffusion of Gases through Liquids and Allied 
Experiments. By Prof. C. Barus. Pp. vii+88. 
(Washington, U.S.A.: Carnegie Institution.) 
The Fermentation of Cacao. Edited by H. H. 
Smith. Pp. lvi+318. (London: J. Bale, Sons, and 
Danielsson, Ltd.) tos. net. 
The Poisonous Terrestrial Snakes of our British 
Indian Dominions (including Ceylon), and How to 
Recognise Them, with Symptoms of Snake Poisoning 
and Treatment. By Major F. Wall. Pp. xiv+149+ 
(Washington, 
iv. Third edition. (Bombay: Bombay Natural 
History Society; London: Dulau and Co., Ltd.) 
3 rupees. 
A Handbook for Birmingham and the Neighbour- 
hood. Prepared for the eighty-third Annual Meeting 
of the British Association for the Advancement of 
Science. Edited by Dr. G. A. Auden. Pp. vii+637. 
(Birmingham: Cornish Bros., Ltd.) 3s. 6d. net. 
Gruppenweise-Artbildung unter spezieller Bertich- 
sichtigung der Gattung Oenothera. By Prof. Hugo 
de_ Vries. Pp. viii+365+22 plates. (Berlin: 
Gebriider Borntraeger.) 22 marks. 
Chemical Technology and Analysis of Oils, Fats, 
and Waxes. By Dr. J. Lewkowitsch. Fifth edition, 
entirely rewritten and enlarged. Vol. i. Pp. xxiii+ 
668. (London: Macmillan and Co., Ltd.) 25s. net. 
Vectorial Mechanics. By Dr. L. Silberstein. Pp. 
vilit+197. (London: Macmillan and Co., Ltd.) 
7s. 6d. net. 
Principles of Thermodynamics. By Prof. G. A. 
Goodenough. Second edition, revised. Pp. xiv+ 327. 
(London: Constable and Co., Ltd.) 14s. net. 
NO. 2289, VOL. 92] 
Sahara. By | 
[SEPTEMBER II, I913 
Sinopsis de los Ascaldfidos (Ins. Neur). 
Longinos Navas, S.J. Pp. 99+2 plates. 
Institut d’Estudis Catalans.) ; 
Abhandlungen der K.K- Geglogischen Reichsanstalt. : 
Band 16. Heft 4. Beitrage zur Kenntnis der 
Schichten von Heiligenkreuz (Abteital, Siidtirol). By _ 
Dr. E. Koken. Pp. 43+6 Taf. (Vienna.) 12 kronen. 
Handbuch der Morphologie der Wirbellosen Tiere. 
Edited by A. Lang. Erster Band. Protozoa. Lief, 2. 
Pp. 161-320. (Jena: G, Fischer.) 5 marks. 
Minds in Distress. By Dr. A. E. Bridger. Pp. 
xii+181. (London: Methuen and Co., Ltd.) 2s. 6d. 
net. 
Pheasants and Covert Shooting. By Capt. A. Max- 
well. Pp. ix+332+16 plates. (London: A. and C. 
By R P- 
(Barcelona : 
Black.) 7s. 6d. net. 
Annals of the Astrophysical Observatory of the 
Smithsonian Institution. Vol. iii. Pp. xi+2qr1. 
(Washington.) 
CONTENTS. PAGE 
The State Mycologist in the Colonies. By E. S. S. 27 
Physical Training. By Dr. MinaL., Dobbie... . 27 
Our Bookshelf . 
Letters to the Editor :— 
Branch Product in Actinium C.—E. Marsden; R. H, 
Wilson... .. . See mite 29 
The Terrestrial Distribution of the Radio-elements and 
the Origin of the Earth. George Craig. ... . 29 
The International Union for Solar Research, By 
Prof. A. Fowler, F.R.S. 
The British Association :— 
Arrsngements for the Birmingham Meeting ..... 31 
Inaugural Address by Sir Oliver J. Lodge, D.Sc., 
LE. D.,:F.R.S.,, President) =: 7.45) ae ov too 
INotes®.. . . . 2. a 2 2 48 
Our Astronomical Column :— 
A New Comet ....4, 4) sate ole ceie nee 52 
‘Another'Comet . ... .). + e+) | o)shanienene 52 
The Protection of Silvered Mirrors from Tarnishing . . 52 
Researches on the,San ..)) 4-4). Gee A ibe 
Thesinstitute of ‘Metals. .5) Viti wa.) ieee 5S 
The Past Summer, By Chas, Harding ...... 53 
A Memoir on the Arthropod Eye. By H.G. J... 54 
Biology of Aquatic Plants. By F.C........ 54 
University and Educational Intelligence ..... » 54 
Societies and Academies. ........ = 2 aed 
Books Received. ..... @isife & 2 ele - 56 
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