630 
| 
surface of the water.—R. Boulouch: The general con- 
dition of stigmatism in a system of. diopters of 
revolution round a given axis.—MM. Massol and 
Faucon: The absorption of ultra-violet radiations by 
the chlorine derivatives of methane. Pure carbon 
tetrachloride gives no absorption band, and the band 
ascribed to this substance by several observers has 
been traced to the presence of carbon disulphide. 
Chloroform and dichloromethane also give no absorp- 
tion bands.—J. Larguier des Bancels: The photo- 
chemical properties of the coloured resinates.—Ch. 
de Rohden: The constant presence of rare earths in 
scheelite as shown by cathodic phosphorescence. In 
scheelites of different origin a study of the phosphor- 
escence spectrum has shown the _ presence of 
samarium, dysprosium, erbium, terbium, europium, 
neodymium, and praseodymium. All the elements to 
which the method is applicable have been found, but 
the relative proportions of the rare elements differ 
considerably from one scheelite to another. All the 
spectra found can be explained with the known rare 
elements.—Marcel Duboux : The estimation of potash 
and magnesia by a_ physico-chemical volumetric 
method. Application to the analysis of wine. The 
method is based on the changes of electrical conduc- 
tivity produced by the gradual addition of an appro- 
priate reagent.—J. Blumenfeld and G. Urbain: The 
isolation of neoytterbium. As a criterion of purity 
of a fraction, the magnetisation coefficient possesses 
advantages over the usual spectrum methods. This 
has been applied to the products resulting from a 
long series of fractionations of the earths of the 
ytterbium group, and the name neoytterbium has 
been given to one of the earths isolated in this way. 
It is defined by its magnetisation coefficient, spec- 
trum, and atomic weight (173:54).—André Brochet 
and André Cabaret: The addition of hydrogen in the 
presence of nickel at atmospheric pressure to com- 
pounds with fatty ethylene linkings. Details of ex- 
periments on the hydrogenation of r-octene, cinnamic 
acid: and its derivatives, allyl, alcohol, anethol, iso- 
safrol, and some unsaturated ketones.—MM. Cousin 
and Volmar: Some nitro- and amino-derivatives of 
orthocyanophenol.—F. Jadin and <A. Astruc: Man- 
ganese in some springs of the central massif.— 
Julien Loisel: The construction of a monogram re- 
presentative of the mean direction of the wind.— 
M. Gazaud ; Contribution. to the study of the mistral. 
—M. Chifflot : The extension of Marsonia rosae in 
cultures of roses. Precautions necessary to prevent 
the attack of rose trees by this parasite.—Em. Miége 
and H. Coupé: The influence of the X-rays on vegeta- 
tion.—Mme. Victor Henri: Study of the metabiotic 
action .of the ultra-violet rays. Modification of the 
morphological and biochemical characters of anthrax 
bacilli. Transmission of the acquired characters.— 
Mme. Z. Gruzewska: The action of some diastases on 
the dextrins.—T. Salimbeni: Bacteriological  re- 
searches on scarlatina. A description of a new 
micro-organism found in the blood of fifteen out of 
twenty cases of the disease. 
BOOKS RECEIVED. 
Report of the Fourteenth Meeting of the Austra- 
lasian Association for the Advancement of Science. 
Held: at ‘Melbourne;to1g- “By. Dr) 19. Ss) Hall: “Ep: 
xcii+751. (Sydney: Australasian Association.) 
British Museum (Natural History). British Hae 
arctic (Terra Nova) Expedition, 1910. Zoology. Vol. 
Not ae Fishes: 7 By. (©. (0.2 Regans (.sPp. ee4e-ocit 
plates. (London: British Museum (Natural History), 
and Longmans, Green and Co.) tos. 6d. 
Indian Forest Insects of Economic Importance. 
NO, 2227, Votnoel 
NATURE 
[AUGUST 13, 1914 
Coleoptera. By .E. .P. XVi+ 648. | 
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Eyre and Spottiswoode.) 15s. : 
English Literature for Schools. The Early Life of 
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net. 
Carnegie Endowment for International Peace. — 
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ment.) 
Department of the Interior. U.S. Geological 
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of Débris by Running water, by G. K. Gilbert. . Pp. 
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xiiif191. (London: Mills and Boon, Ltd.) 2s. 6d. 
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Recent Progress in Aeronautical Science. . 614 
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