EE 
DECEMBER 4, 1913] 
NATURE 
417 
the methods adopted to eradicate the sponge from the 
infected areas.—Prof. J. Playfair McMurrich: Two 
new species of Actinians from the coast of British 
Columbia. These specimens probably represented 
stages of a single species, and belonged to a group 
hitherto not recorded from the west coast of America. 
Paris. 
Academy of Sciences, November 24.—M. F. Guyon 
in the chair—aA. Haller: The alkylation of thujone | : 
| nitrogen collected contained no argon.—Remarks by 
and isothujone by means of sodium amide. An 
account of the preparation of dimethyl-, diallyl-, and 
triallylthujone, and of dimethylisothujone and _ allyl- 
isothujone.—A. Miintz and H. Gaudechon: Contribu- 
tion to the study of clays. Experiments on the sedi- 
mentation of clays under the action of gravity alone, 
or the combined action of gravity and an electric field. 
—Edmond Perrier: The international protection of 
nature. On the initiative of M. Paul Sarrasin and 
the Swiss Government a conference was held at Berne 
at which it was decided to form a permanent com- 
mission to deal with the question of the preservation 
of rare animals and birds.—A. Verschaffel: Remarks 
on the communication of A. Claude and L. Drien- 
court concerning a new impersonal coincidence micro- 
meter.—A. Guntz and A. A. Guntz, Jr.: The hydrates 
of silver fluoride. Details of the conditions necessary 
for the isolation of the three hydrates, AgF,4H.O, 
AgF,2H.O, and AgF,H,O.—A. Calmette and V. 
Grysez: Experimental demonstration of the existence 
of a generalised lymphatic stage, preceding localisa- 
tions, in tuberculous infections. It is shown that no 
local lesion is produced at the point of penetration of 
the bacillus.—Michel Petrovitch: The minimum 
modulus of an analytical function along a circum- 
ference.—G. Kenigs: Doubly decomposable move- 
ments and surfaces which are the seat of two families 
of equal curves.—R. Fortrat: Groups of real and 
apparent lines in band spectra.—L. Margaillan: The 
neutralisation of chromic acid. The neutralisation of 
chromic acid has been studied by means of the 
hydrogen electrode. The curve of electromotive force 
shows two points of inflection corresponding to the 
change of colour of methyl orange and phenolphthalein 
respectively.—Lucien Daniel: A new graft hybrid.— 
Robert Douin: The arrangements for the absorption 
of water in the female capitule and male disc of the 
Marchantiacee.—A. Guilliermond: New cytological 
researches on the formation of anthocyanic pigments. 
These pigments and the colourless phenolic com- 
pounds are always the product of the activity of the 
mitochondria.—Raoul Combes : The experimental pro- 
duction of an anthocyanine identical with that formed 
in red leaves in autumn, starting with a compound 
extracted from green leaves. The red compound was 
shown to be identical with the colouring matter 
extracted from red leaves. Contrary to the views cur- 
rently held, it is a reduction, and not an oxidation 
product.—P. Nottin: The influence of mercury on 
alcoholic fermentation.—F. Bordas: The transmission 
of typhoid fever by the air. Remarks confirming the 
conclusions drawn in a recent paper by A. Trillat and 
M. Fouassier.—Ch. Nicolle and L. Blaizot : Stable and 
atoxic antigonococcus vaccines.—MM. Variot and 
Lavialle: The effects of sweetened milk in the treat- 
ment of dyspeptics with gastric intolerance. The 
special eupeptic properties of sweetened milk appear 
to be entirely due to the high proportion of cane 
sugar.—J. Bergonié: Posology in physiotherapy.—Ch. | 
Gravier ; Some results of the second French Antarctic 
Expedition: Alcyonaria.—R. Anthony and L. Gain: 
The development of pterylosis in the penguin.—M. 
Fauré-Fremiet: Erythropsis agilis—J. Wolfi: The 
influence of iron in the development of barley and 
the specific nature of its action. Neither nickel nor 
NO. 2301, VOL. 92] 
chromium can replace iron in the development of 
barley.—Em. Bourquelot and M. Bridel: The bio- 
chemical synthesis of the glucosides of polyvalent 
alcohols: the eglucosides of glycerol and glycol.— 
Arthur L. Day and E. S. Shepherd; Conclusions to be 
drawn from the analysis of the gases from the crater 
of Kilauea. The gases are undergoing chemical inter- 
action as they rise in the crater, with marked develop- 
ment of heat. Water vapour is present in large quan- 
tity, and chlorine in a negligible proportion only. The 
A, Lacroix and A. Gautier on the preceding paper.— 
Ph. Glangeaud: The characteristics of the spring 
waters in the volcanic formations of Auvergne.—Ph. 
Négris: The discovery of the Eocene above the 
Cristallophyllian of the Cyclades and the genesis of 
the Cristallophyllian facies in Greece—G. Valsan: 
The evolution of the Roumanian plain between the 
rivers Olt and Arges. 
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