May 21, 1914] 
NATURE 
315 
regulator for the flow of water in streams and reser- 
voirs with constant level_—J. W.: Nicholson: The 
atomic weights of the elements of nebula. A_dis- 
cussion of the results recently published by MM. 
Bourget, Fabry, and Buisson on the spectra of nebule. 
—A. Buhl: The geodesic torsion of closed contours.— 
N. E. Nérlund: Series of faculties and the methods of 
summation of Cesard and Borel.—Léopold Fejér : The 
number of changes of sign of a function in an interval 
and its moments.—Léon Brillouin: The diffusion of 
light by a homogeneous transparent body.—André 
Léauté ; The mathematical theory of the working of 
electric lines formed of two. different trunks.—J. de 
Kowalski: The oscillating spark as an economical 
source of ultra-violet light.—Alexandre Dufour: A 
kathodic oscillograph.—René Constantin ; Fluctuations 
of concentration in a _ colloidal emulsion.—André 
Helbronner and Gustave Bernstein: The vulcanisation 
of solutions of india-rubber by ultra-violet light.— 
(échsner de Coninck and M. Gérard: The determina- 
tion of the atomic weight of nickel. The figure 58-57 
was obtained as a mean of five determinations of the 
amount of nickel obtained by the reduction of. the 
hydrated oxalate.in hydrogen at 270° C.—M. Picon : 
The preparation of normal pentene. Remarks on the 
inelting and boiling points of the first terms of the 
true normal acetylene hydrocarbons. This hydro- 
carbon has been prepared by the interaction of normal 
propyl iodide and an ammoniacal solution. of mono- 
sodium acetylene at —20° C. Its physical constants 
are given.—Georges Dupont: The synthesis of the 
acetylene y-diketones. Good yields are obtained by 
the oxidation of the acetylene y-glycols by chromic 
acid in acetic solution. Three examples of the reaction 
are given.—Andre Brochet: The catalytic hydrogena- 
tion of liquids under the influence of the common 
metals at moderate temperatures and pressures.— 
Charles Tanret: The plurality of the starches.—R. 
Souéges : New observations on the embryogeny of the 
Crucifereze.—Paul de Beauchamp: The evolution and 
affinities of the genus Dermocystidium.—MM. Variot 
and Fliniaux: Tables of the comparative growth of 
infants raised at the breast or by the bottle during the 
first year of life. Contrary to current ideas, there is 
a very small difference between the size and weight 
of children raised at the breast or by the bottle, if the 
food in the latter case is properly made up.—Louis 
Roule: The influence exercised on the migration of 
salmon (Salmo salar) by the proportion of dissolved 
oxygen in the streams. On the coast of Brittany it 
has been noticed that the salmon select certain rivers 
in preference to others and for no obvious reason. 
Determinations of the proportions of dissolved oxygen 
in the river waters shows that the salmon select those 
in Which this proportion is highest.—Rémy Perrier 
and Henri Fisher: The existence of spermatophores in 
some Opisthobranchs.—Ch. Gravier: The Madrepores 
collected by the second French Antarctic Expedition 
(1908-ro0).—A. Malaquin and A. Moitié: Experimental 
observations and researches on the evolutive cycle of 
Aphis euonymi, destructive to the beetroot.—R. Fosse : 
The simultaneous presence of urea and urease in the 
same plant.—Em. Bourquelot and Alex. Ludwig : The 
bicchemical synthesis of — B-anisylglucoside.—L. 
Lematte: The estimation of the monoamino-acids in 
the blood. The albumenoids and ammonia are pre- 
cipitated by phosphotungstic acid, neutralised with 
soda and the excess of the phosphotungstic acid pre- 
cipitated by calcium chloride, and excess of the latter 
by oxalate. The solution then contains the amino- 
acids, and can be determined by the formol method.— 
Louis Mengand: The tectonic of the neighbourhood of 
Infiesto, Arriondas and Rivadesella (Asturia).—M. 
Dalloni : The Neocomian in the west of Algeria. 
NWomeea25, VOL. 93] 
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