May g, 1912] 
and P. de la Gorce: Photometric measurements made 
during the eclipse of April 17. 
the results is unsymmetrical with respect to the time 
of the maximum. phase.—Fred Vlés and Jacques 
Carvallo; The kinematographic registration of the 
solar eclipse of April 17 on the Spanish portion of its 
trajectory.—M. Yazitzéica: Isothermal networks.—E. 
Delassus ; Lagrange systems with principal parameter. 
—KEmile Borel; Arithmetical and analytical models of 
apparent irreversibility —G. Ribaud: The appearance 
of new lines in a Geissler tube containing bromine 
placed in a magnetic field. 
a secondary effect due to a modification in the nature 
of the. discharge. In a Geissler tube, the magnetic 
field transforms the continuous discharge into a more 
or less condensed discontinuous discharge.—R. Fortrat : 
The structure of some spectral bands. An analysis of 
the green carbon band, the bands of hydrocarbons 
and of water.—Jean Meunier: Gaseous combustion in 
vortices and its analogy with the appearance of nebulz | 
and comets.—Paul Bary: The approximate value of 
the molecular weight of india-rubber. On 
assumption that vulcanised rubber is (C,oH,,),S., ex- 
periments on the least amount: of sulphur required to 
vulcanise a fixed amount of rubber gave a value for n 
of 18'4.—N. L. Miiller: Remark on the communica- 
tions of M. Pierre Achalme on the réle of the inter- 
atomic electrons in catalysis and electrolysis. A claim 
for priority.—P. Achalme : Concerning the communica- | 
tion of M. N. L. Miller. A reply to the preceding 
paper.—Albert Granger: The methods of manufacture 
of earthenware obtained from the excavations at 
Suziane.—Camille Matignon: The function of the 
valency in the stability of binary metallic compounds. 
—Maurice Nicloux: The preparation of iodic acid for 
the estimation of carbon monoxide. The Stas method 
of preparing iodic acid by the reaction of fuming nitric 
acid and iodine is capable of giving much higher yields 
than those indicated by Stas, more than 90 per cent. 
of the iodine being converted into iodic acid if suitable 
precautions are adopted.—J. B. Senderens: The 
catalysis of the cyclanols in the wet way by means of 
sulphuric acid. The preparation of the cyclenes. The 
cyclanols lose water readily under the influence of 
diluted sulphuric acid, giving cyclenes. The reaction 
must be referred to a specific catalytic action of the 
sulphuric acid rather than to a direct dehydration.— 
Marcel Delépine: New classes of oxyluminescent sub- 
stances.—E. Carriére: The acylic acid aldehydes. The 
acid aldehyde of succinic acid. Formyl-succinic ethyl 
ester, (C,H,.CO.).CH,.CH(CHO)(CO,C.H.), is readily 
hydrolysed by aqueous oxalic acid, the acid aldehyde, 
OCH.CH,.CH,.CO,H, being formed. — Georges 
Dupont: The aci-nitro-derivative of tetramethylketo- 
furane.—Henry Hubert: The gold-bearing strata in 
western Africa.—Ph. Nogier : 
based on increasing and decreasing the activity of 
the endocrinal glands by physical methods. The 
glandular secretions can be stimulated by using the 
electric current or reduced by using filtered X-rays or 
the y radium rays.—A. Conte: Encyrtus sericophilus 
and its use in sericiculture.—A. Pézard: The deter- 
mination of the secondary sexual characters in the 
Gallinaceze.—Mieczyslaw Oxner: New experiments on 
the nature of the memory in Coris julis.—R. Fosse : 
The direct production of urea at the expense of albu- 
minoids either by oxidation or hydrolysis. An account 
of the method of isolating the urea formed from 
albumin by the action of an aqueous solution of 
potassium permanganate.—H. Labbé and G. Vitry: 
Contribution to the study of non-dialysable substances 
in urine.—Louis Gentil : The origin of the folds of the 
Saharan Atlas.—Fernand Meunier: The Protoblattine 
and Mylacrinz of the Commentry coal measures. 
NA, 22170, vou. 8a] 
The change of colour is | 
| and under indefinitely high pressure. 
Therapeutic methods | 
NATURE 
The curve expressing | 
261 
GOTTINGEN. 
Royal Society of Sciences.—The Nachrichten (physico- 
| mathematical section), parts i. and ii., for 1912, con- 
the | 
tain the following memoirs communicated to the 
society :— 
July 13, 1911.—K. Forsterling: Theoretical con- 
siderations on the propagation of light in absorbing 
active uniaxal crystals. 
October 28, 1911.—C. Runge: The astronomical 
determination of position in ocean ships and aircraft. 
December 9, 1911.—F. Kérber: The two limiting 
volumes of a liquid at the absolute zero of temperature 
December 23, 1911.—B. Diirken: Unilateral extirpa- 
tion of the eye in young tadpoles. 
December 23, 1911.—L. Bieberbach: Minkowski’s 
reduction of the positive quadratic forms and the finite 
| groups of linear integral substitutions. 
January 13, 1912.—R. Fricke: Contributions to the 
transformation-theory of the automorphic functions 
(ii.).—G. Révész: Demonstration that in so-called 
musical pitch two independent properties of sound are 
distinguishable. 
February 3, 1912.—E. Riecke: The molecular theory 
of the piezoelectricity of tourmalin. 
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