APRIL 25, 1912] 
NATURE 
209 
internal 
therefore 
constant. The 
molecule 
ture and R is 
energy of a_ substance 
(U.+ y+ sR?) where U, is the energy due to mole- 
the gas 
is per 
cular attraction and uw, the internal energy. Formulz 
for the specific heat at constant volume and constant 
pressure, the Joule-Thomson effect, &c., were deduced 
and compared with the facts. 
Paris. 
Academy of Sciences, April 15.—M. Lippmann in the 
chair.—J. Boussinesq : The geometric theory for a non- 
rigid body of continuous displacements, as well as the 
deformations and rotations of its particles—Yves 
Delage: A self-recording bathyrheometer. A descrip- 
tion of an instrument for measuring and recording 
surface currents. It has the advantage of being 
capable of total immersion, and measures both veloci- 
ties and directions of the currents.—M. Le Chatelier : 
Remarks on a work by F. W. Taylor dealing with 
the principles of scientific organisation of works.— 
J. Bosler and P. Idrac: The spectrum of the new star 
in the Twins. Observations made at Meudon showed 
a complete series of the bright lines of hydrogen. 
The principal nebular line was also noted.—Fr. 
Iniguez: The new star in the Twins. From March 
15 to 19 the lines HS, H¢, and K were brilliant. The 
line K disappeared on March 20.—Etienne Delassus : 
The linkages of any order of material systems.—B. 
Mayor: The deformations of certain elastic systems. 
—Emile Borel: The geometric bases of statistical 
mechanics.—J. Bergonié: The phenomena of light- 
ning. A description of some peculiarities caused by 
a lightning stroke on March 20 near La Flouquette. 
—C. Dauzére: The stability of cellular vortices——M. 
Deslandres: Remarks on the preceding communica- 
tion.—A. Blondel: An_ electro-chronograph with 
synchronised sparks. The vibrator of the secondary 
coil producing the sparks is controlled by a tuning- 
fork, not directly, but by the action of a current itself 
controlled by the tuning-fork. The necessary precau- 
tions are given in detail.—C. Camichel: The measure- 
ment of the differences of phase of two alternating 
currents.—B. Szilard: The  radio-activity of the 
thermal springs of Saint Lucasbad (Hungary).— 
Albert Bruno and P. Turquand d’Auzay: The estima- 
tion of sulphates in solution by a physico-chemical 
volumetric method. The changes in electrical con- 
ductivity are measured when a solution of baryta is 
added to the sulphate solution. In the case of wine 
the method was found to be untrustworthy.—Georges 
Dupont: The oxidation of some ketohydrofuranes.— 
André Meyer: The action of oxyurea upon some 
B-ketonic esters —MM. Amouroux and Murat: Some 
syntheses starting with butyrone. Butvrone can 
readily be obtained in quantity by the catalytic action 
of thoria upon butyric acid. Various derivatives 
obtained by the Grignard reaction from this ketone 
are described.—Paul Gaubert: The circular polarisa- 
tion of liquid crystals.—Lucien Daniel: The trans- 
formation of a chrysanthemum as a result of repeated 
budding.—Henri Piéron: The variation of the sensa- 
tion law as a function of the intensity of stimulation. 
—Raphael Dubois: The physical properties of physio- 
logical light. Remarks on a recent note by M. 
Ozorio on this subject—Edmond Hue and Marcel 
Baudouin: The atavic characters of certain lumbar 
vertebrzee of men of the polished stone period. <A 
study of the lumbar vertebrz of Neolithic men from 
Vendrest proves three atavic characters, showing that 
these skeletons must be classed between anthropo- 
morphs and modern man.—A. Marie and Léon 
Mac-Auliffe: The physiognomy of assassins. Results 
of researches on this class of criminals.—Raoul 
NO. 2217, VOL. 89] 
Dupuy: Contribution to the study and treatment of 
children of arrested development.—Maurice Letulle 
and L. Nattan-Larrier; The epithelioma of the 
embryonic ectoderm. Embryonic ectodermic car- 
cinoma is always secondary to a mixed tumour either 
of the placenta or of the completely developed 
organism.—Louis Gentil: The tectonic of the Haut 
Atlas in Morocco, and its relations with the Atlas of 
the Sahara.—Henri Perrotin: An attempt at the repre- 
sentation of terrestrial temperatures as a function of 
the cloud conditions. 
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Witterung, Erdoberflache 
Lae 
fo 
und Leben: ihr Inein- 
