368 
referred to the common H. bovis.—T. R. Hewitt : The 
iarva and puparium of the frit-fly. The author de- 
scribes the external features of this destructive larva 
in greater detail than has yet been attempted, direct- 
ing attention to sensory organs in the head region, 
the mouth hooks, and the spiracles.—Prof. J. Wilson : 
Polygamous Mendelian facters. In papers on the 
colours of horses published in 1910 (Roy. Dublin Soc. 
Proc, ‘vol; -xii:,9p-, 331))and, 1912) (:bid., vol, 2am, 
p. 184) it was observed that each of the colours was 
the result of a single factor which was polygamous. 
That is to say, the factor for one colour can mate 
with the factor for any of the others, one at a time. 
When the observation was made, however, it was not 
realised to be unusual or extraordinary, but was 
assumed to be a phenomenon which might occur fre- 
quently; consequently stress was not laid upon the 
observation. It was eventually seen, however, that 
the phenomenon is very unusual, and with the data 
collected, together with additional data to be found 
in Dr. Walther’s ‘‘ Beitrage zur Kenntniss der Vererb- 
ung der Pferdefarben,’’ the phenomenon is now demoh- 
strated. It would be inferred from Dr. Walther’s 
data if the ‘“‘absences’’ which his analysis requires 
were eliminated, and the conditions which they stand 
for substituted in their stead. 
Paris. 
Academy of Sciences, May 18.—M. P. Appell in the 
chair.—Armand Gautier and P, Clausmann:; Fluorine 
in freshwater. An application of the method pre- 
viously described for determining traces of fluorine to 
the examination of water from rivers, glaciers, and 
springs. No potable waters examined contain more 
than 0-6 milligram of fluorine per litre. In Paris 
water the amount of fluorine taken a day per indi- 
vidual is about 0-12 mgr., or less than a quarter the 
amount daily excreted.—Charles Moureu and Georges 
Mignonac: A new class of nitrogen compounds, the 
ketisoketimines. This name is applied to substances 
of the type R.CR’: N.CR: CH.R", obtained by the 
action of heat upon the ketimines.._L. Maquenne and 
E. Demoussy : The mobility of potash in plant tissues. 
—J. Delauney : The times of revolution of the satellites 
of a given system presenting certain relations between 
themselves.—W. Goloubeff: Functions with discon- 
tinuous singularities.—Marcel Moulin: The position of 
the centre of gravity of spiral springs furnished with 
theoretical terminal curves.—Albert Turpain: A photo- 
graphic self-recording microammeter and the measure- 
ment which it furnishes. The apparatus described has 
given good records of messages from the Eiffel Tower 
at Poitiers, 300 km. distant. The instrument is of 
use in geodesic operations.—G. Gouré de Villemontée : 
The propagation of electricity through paraffin oil.— 
Léon and Eugéne Bloch: The spark spectra of some 
elements in the extreme ultra-violet. Wave-lengths 
are given of the lines for arsenic, antimony, tin, bis- 
muth, aluminium, and cadmium for the range 2134 to 
1855.—R. Marcelin : The evaporation of slightly super- 
heated liquids and solids. Results are _ given for 
nitrobenzene, naphthalene, and iodine.—Léo Vignon : 
The solvents of coal. Coals of different origin were 
extracted with alcohol, ether, benzene, toluene, aniline, 
nitrobenzene, pyridine, and quinoline. The soluble 
and insoluble portions of the coals were analysed. 
Bituminous coals gave a high aniline extract.—J. 
Bougault : The process of saponification of esters and 
of amides by strong sulphuric acid.—Georges Tanret : 
The constitution of galegine. This alkaloid was ex- 
tracted from the seeds of Galega officinalis, and has 
the composition C,H,,N,. Its most important re- 
action is the formation of methyl-3-pyrrolidine and 
NO...2327,. VOL. 93 | 
NATURE 
[JUNE 4, 1914 
| urea by hydrolysis with baryta water.—E. Carriére , 
The equilibrium at the ordinary temperature of the 
enol and aldehyde forms of ethyl formylsuccinate and 
ethyl formylethylsuccinate.—R. Fosse: The chemical 
activity of xanthydrol and its application to the esti- 
mation of urea.—Robert Douin: The development of 
the - fruit-bearing apparatus of Marchantia.—M. 
Marage: The sensibility. of the. physiological ear for 
certain musical. sounds.—A.. Moutier: The _ inter- 
dependence of peripheral. arterial hypotension and 
visceral arterial hypertension.~-A. Trillat and M. 
Fouassier : The action of cooling on microbial droplets. 
—J. Nageotte : Some peculiarities of the nerve fibre of 
batrachians and on the so-called alterations of the 
myeline sheath, considered as causing changes of 
excitability of the nerves.—M. Vasticar: The nuclear 
formations of the internal auditive cell—_Mme. Marie 
Phisalix : Poisonous properties of the parotidian saliva 
of Coronella austriaca.—L. Germain and L. Joubin: 
The Chetognaths of the cruises of the Prince of 
Monaco.—Gabriel Bertrand and M. Rosenblatt: The 
thermo-regeneration of sucrase. A study of the 
changes in the hydrolysing power of sucrase from 
yeast produced by exposure to varying temperatures. 
—F. Kerforne: The presence of Calymmene blumen- 
bachi in the Gothlandian of Brittany.—N. Arabu: The 
Trias of Ismid.—Léon Bertrand and Antonin Lanquine : 
New observations on the tectonic of the south-west 
slopes of the Maritime Alps.—E. A. Martel: The 
chasms of the Tertiary formations in the neighbour- 
hood of Vertus (Marne).—Alphonse Berget: A piezo- 
metric sounder. Use is made of the compressibility 
of water contained in a tube silvered internally. The 
water is in contact with mercury, and. the contraction 
of the water is measured by the amount of the silver 
removed as amalgam. The sensibility is practically 
constant at increasing depths, and gives an accuracy 
of 10 metres at a depth of about 6000 metres.—Ernest 
Esclangon: An instrument for recording the intensity 
of rainfalls.—Gabriel Guilbert : Weather prediction. 
May 25.—M. P. Appell in the chair.—Fred. 
Wallerant : Contribution to the study of polymorphism. 
Experimental details concerning the polymorphism of 
malonic acid, monochlorocamphor, benzyl cinnamate, 
benzaldoxim, paratolylphenylketone and _ trinitrometa- 
cresol.—sS. A. S. Albert, Prince of Monaco: The third 
campaign of Hirondelle IJ. (twenty-sixth of the com- 
plete series). In the course of bathypelagic work it 
has been found that certain organisms, more especially 
fishes, are only found during the daytime at a depth 
not less than 1000 metres, but are commonly obtained 
during the night at a depth of 200 metres. This 
corresponds to a change of pressure of too atmo- 
spheres.—M. Jacques Loeb was elected a correspondant 
for the section of anatomy and zoology in the place of 
the late Lord Avebury.—A. Schaumasse : Observations 
of the Zlatinsky comet (1914b) made with the 
equatorial at the Nice Observatory. Data given for 
May 18, I9, 20, 21, 22, 23. Changed from 6th mag- 
nitude on May 18 to 8-7 magnitude four days later.—~- 
Louis Fabry: The problem of the minor planets.—P. 
Chofardet: Observations of the new comet 1914b 
(Zlatinsky) made at the Observatory of Besancon. 
Four positions given for May 19-22. Was estimated 
to be of the 5th magnitude on May 19.—L. Ballif: 
The surfaces developed in two different manners by 
the motion of an indeformable curve.—W. de Tannen- 
berg: A functional equation and curves of constant 
torsion.—T. H. Gronwall: Laplace’s series.—R. W. 
Wood and L. Dunoyer: The optical resonance of 
sodium vapour under the stimulation of one only of 
the D lines. It has been proved that the resonance 
1ediation excited by the line D, alone contains that radia- 
