JUNE 25, 1914| 
extracted from pitchblende was 206-74, or 0-4 less 
than the atomic weight of ordinary lead. This figure 
confirms the theoretical indications.—E. Berger: The 
reduction by hydrogen of the oxides of copper and 
nickel in presence of a dehydrating agent. 
reduction of these oxides is strongly accelerated when 
the water vapour is removed as fast as it is formed. 
The reduction of copper oxide is continuous, but there 
are indications of the existence of a nickelous oxide, 
Ni,O.—Jacques Joannis: The oxidation and reduction 
of copper.—L. Gay, F. Ducellier, and A. Raynaud : The 
bromination of benzene and its homologues. The 
catalytic action of manganese. Metallic manganese 
exerts a marked accelerating action in the bromina- 
tion of benzene and toluene. If the reagents are dry 
the metal is unchanged.—Marcel Godchot: Thujone 
and thujamenthone. The direct passage from one to 
the other. Thujone and hydrogen in the presence of 
nickel give a good yield of thujamenthone.—Léo 
Vignon: The synthetic preparation of a coal gas. 
A scheme for the conversion of a mixture of coal gas 
and water gas, or water gas alone, into a gas possess- 
ing approximately the heating value of ordinary coal 
gas and free from carbon monoxide. It is based on 
the use of lime, nickel, and other catalytic agents.— 
Georges Friedel: A layer of iodargyrite in France. 
This rare mineral has been found in cavities in a 
vein of campylite at Les’ Montmans, near Echassiéres. 
G. André: The velocity of hydrolysis and of displace- 
ment by water of the nitrogenous and mineral mate- 
rials contained in leaves.—Charles Nicolle and Georges 
Blanc: Are the spirilla of recurrent fever virulent 
during the successive stages of their evolution in the 
flea? Demonstration of their virulence at an invisible 
stage.—]J. E. Abelous and C. Soula: Modifications of 
the cerebral action in anaphylaxy. An experimental 
study in the changes in the cerebral metabolism result- 
ing from the injection of a non-fatal dose of urohypo- 
tensine.—Auguste Lumiére and Jean Chevrotier: The 
vitality of cultures of gonococcus. It would appear 
from the experiments’ described that the poisonous 
substance to which the rapid sterilisation. of gono- 
coccus cultures is due is an oxidation product of the 
exotoxines secreted by the organism. Consequently 
by working under anaerobic conditions the vitality of 
gonococcus cultures can be increased.—Louis Roule : 
The deep-water fishes belonging to the family of the 
Eurypharyngideze.—Gabrie! Bertrand and M. Rosenblatt : 
The thermo-regeneration of the various diastases of 
yeast.—S,. Sécerov: The influence of ultra-violet light 
on the coloration of the fur of rabbits and guinea- 
pigs. The white fur of these animals becomes yellow 
or reddish under the action of ultra-violet light.—H. 
Bierry and Mlle. Z. Gruzewska: The estimation of 
sugar materials in the liver.—M. de Lamothe: The 
ancient alluvial sheets and terraces of the Rhéne and 
Isére, near Valence.—G. Gardet: New fossiliferous 
horizons in the upper Muschelkalk in the neighbour- 
hood of Bourbonne-les-Bains.—M.'de Montessus de 
Ballore: The probable epirogenic origin of earth- 
quakes in New Zealand. 
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Beitrage zur Naturdenkmalpflege. Band iv., Heft 2. 
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NATURE 447 
Ueber den Schutz der Natur Spitsbergens. By H. 
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Livingstone College Year Book, 1914. Pp. 136. 
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The Romanes Lecture, 1914. The Atomic: Theory. 
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Roger Bacon: Essays contributed by various writers 
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Der Sdugetierorganismus und seine Leistungen. 
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plates. Zweiter Teil. Pp. 173. (Leipzig: P. Reclam, 
jun.) Two parts in one volume. 1.75 marks. 
The Unconscious. By Prof. M. Prince. Pp. xii+ 
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The Essence of Astronomy. By E. W. Price. 
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Studies in Economic and Political Science. Edited 
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Studien in der Geophysik und der Kosmischen 
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