528 
NALORLE 
[MARCH 31, 1904 
Paris. 
Academy of Sciences, March 21.—M. Mascart in the 
chair.—On hypoabelian groups: Camille Jordan.—New 
researches on the density of fluorine: Henri Moissan (see 
p- 520).—On an African trypanosome, pathogenic for 
horses: A. Laveran and F. Mesnil. In the course of their 
researches on human trypanosomiasis, Messrs. Dutton and 
Todd have discovered a new trypanosome which is patho- 
genic to horses, and to which they give the name of 
Ty. dimorphon. A comparison of this trypanosome with 
Tr. gambiense shows that the two species are morpho- 
logically distinct. That they are distinct species is also 
shown by the fact that animals which have acquired 
immunity for Tr. gambiense are still sensible to Tr. 
dimorphon; human serum, which is without action upon 
Tr. gambiense, has a feeble but distinct action upon the 
other species. The general conclusions of Dutton and Todd 
are confirmed.—On some formule useful in discussing the 
stability of a vitreous medium : P. Duhem.—On the general 
conditions and unity of formation of combustible minerals 
of all ages and of all species: M. Grand’Eury. The author 
regards all Coal-measures, of whatever epoch, as_ being 
formed under water in a similar manner by the débris of 
marshy vegetation.—On forms decomposable into linear 
factors: F. Hocevar.—The law of disappearance of the 
activity induced by radium after heating the substances 
rendered active: P. Curie and J. Danne. Plates of 
platinum, which had been exposed for some time to the 
action of radium, were heated to different temperatures, and 
the rate of loss of activity studied at the room temperature. 
The curves, taking time as the abscissee and the logarithm 
of the intensity of radiation as the ordinates, become linear 
at the higher temperatures.—The study and comparison of 
the methods of reduction of magnetic hysteresis: Ch. 
Moureu. The hysteresis may be suppressed by the action 
of an oscillating magnetic field—The action of magnetism 
on phosphorescence : Alex. de Hemptinne. All phosphor- 
escent substances do not appear to be equally susceptible 
to the action of a magnetic field.—The application of the 
electric spark to the chronophotography of rapid move- 
ments: Lucien Bull. An instrument is described which is 
capable of taking 1500 images per second.—The study of 
colloidal solutions: Victor Henri and André Mayer. 
] 
It | 
has been generally held that the phase rule cannot serve as | 
a guide in the case of colloidal solutions. The author holds 
that the phase rule may be applied to the systematic study 
of the precipitation of colloids whenever the phenomena of 
precipitation are reversible-—The transformation of oxides 
and oxygenated salts into chlorides: C. Matignon and 
F. Bourion. Further applications are given of the use of 
a mixture of chlorine and sulphur chloride in the preparation | 
of anhydrous chlorides. The substances studied include 
tungstic acid, chromic and ferric oxides, the oxides of nickel 
and cobalt, zinc, manganese and tin, boric anhydride and 
the sulphates of barium and calcium. In the last two cases 
the transformation is so complete that the reaction may 
serve as the basis of a quantitative method.—The lead and 
silver salts of the monoalkylphosphoric acids: J. Cavalier. 
—Arnisterine, the phytosterine of Arnica montana: T. 
Klobb.—On some aminoalcohols with alcoholic function of 
the type R.C(OH)(CH,).CH,.N(CH,),: E. Fourneau. 
—Hyphoene coriacea, the textile palm of Madagascar : 
Pascal Claverie.—On the persistence of alternate structure 
in some Labiates: G. Chauveaud.—Specific action of some 
parts of the body on certain phosphorescent screens: 
Augustin Charpentier.—On the colour reactions resulting 
from the action of tyrosinase: C. Gessard.—On the 
presence of an apparatus for accommodation in the com- 
pound eyes of certain insects: Pierre Vigier. Proofs are 
given of the existence in the compound eyes of Aeschna of 
a real accommodation apparatus, allowing of the adaptation 
of the sight to different distances.—Study of the law of 
action of maltase. The influence of the concentration of 
the maltose: E. F. Terroime. The influence of the con- 
centration of the maltose is similar to the cases of invertine; 
emulsin, amylase and trypsin.—Studies on the action of 
maltase. The constancy of the ferment: Mlle. Ch. 
Philoche. When maltase from Taka diastase is allowed 
to act at 40° C. the activity of the ferment undergoes no 
appreciable change in the first twenty-four hours.—On the 
NO. 1796, VOL. 69| 
duration of the treatment of arterial hypertension in 
arteriosclerosis by d’Arsonvalisation: A. Moutier. Under 
appropriate diet, the arterial tension in patients suffering 
from arteriosclerosis can be rapidly reduced to the normal 
by the use of high frequency currents.—-The action of metals 
in the colloidal state and of artificial oxidases on the evolu- 
tion of infectious diseases: Albert Robin and G, Bardet.— 
The action of formic acid on the muscular system: E. 
Clement. Sodium formate increases the muscular power 
and also the resistance to fatigue to a marked extent.—The 
fusion of ice by electricity, and the application of this principle 
to navigation in Arctic seas: F. Romanet du Caillaud. 
DIARY OF SOCIETIES. 
TUESDAY, Arpt 5. 
NaTIONAL AssociaTION OF ManuaL TrRaininG TEACHERS.—Annual 
Conference at Hastings, at 3.—The Psychological Importance of Manual 
Training : Sir John Cockburn, 
THURSDAY, Aprit 7. 
LInNEAN Society, at 8.—The Morphology and Anatomy of the Stem 
of the Genus Lycopodium: C. E. Jones. 
ROnTGEN Society, at 8.30.—Exhibition Evening. 
FRIDAY, Aprit 8. 
GgoLoacisTs' AssociaTION, at 8.—On the Metamorphism of Sediments : 
G, Barrow. 
Macacotoaicat Society, at 8.—Description of apparently New Species 
of Corbicula, Melania, Vivipara and Lagochilus from Java: Rev. R. 
Ashington Bullen.—The Hawaiian species of Opeas: E. R. Sykes.—On 
some Non-marine Hawaiian Mollusca: C, F. Ancey.—Description of 
a New Species of Ancilla from New Zealand: Rev. W. H. Webster.— 
Report on a Small Collection of Helicoids from British New Guinea, 
with Description of a New Species: G. K. Gude. 
Royat, ASTRONOMICAL SOCIETY, at 5. 
CONTENTS. 
Science in the Days of the Inquisition. 
PAGE 
By Prof. 
GH. Bryan, FUR SS 22 Jv. 2-0 eth eS Oly 
A Monograph on Imported Parrots. By O. V. A.. 507 
Multiplication Table. By ©. V.B: ... =. . . 495, 508 
The Zoological Record for 1902, ByR.L. .... 508 
Our Book Shelf ;— 
Hooper : ‘‘ Ether and Gravitation.”—W. M. H. . 509 
Buckley : ‘‘ Highway Construction in Wisconsin” . 510 
French and Boardman : ‘‘ Practical Chemistry’” . . 510 
Tompkins: ‘‘ Marsh-Country Rambles” . 510 
Letters to the Editor :— 
The Occurrence of Thorium in Ceylon.—Prof. 
Wyndham Dunstan, F.R'S.. . . - : « <a). 510 
Ionisation of Air.—Norman N.Campbell. ... 511 
Respiration in Frogs.—Dr. A. Keith . Beier theo. St: 
Degradation of Elements.—S. H. Woolhouse ; 
Sir William Ramsay, K.C.B., F.R.S.. ec 
Remarkable Destruction of Birds in Cardigan Bay.— 
C. W. Herbert Greaves . SCO oe Qe 
Distribution of the Nightingale. —Alfred O. Walker 512 
The Natural History of Venezuela, (J//ustrated.) . 513 
Patent Laws, By Ivan Levinstein EM. 0 GLV:! 
Bird Migration in Great Britain and Ireland. By 
Wim: EagleiClarkemas-miewc ccfic. + ic) ccc 516 
Notes Pe sc 517 
Our Astronomical Column :— 
Astronomical Occurrences in April een ceo SA) 
Standard Velocity Stars! — - . - 2) os) tei een 20 
Observed Motions in the Nova Persei Nebula. . . . 521 
A New Form of Equatorial Mounting . . . . .. . 521 
The Weonid Shower of 19039 5 = =) <5 3) wen ere) eee 
The Institution of Naval Architects - Paria ch, GOL 
Recent Discoveries in Bacteriology. ...... . 522 
Fluorescent Bodies Excited by Radium. By F. 8S. 523 
The Palolo Worm of Samoa, (J//ustrated.)... . 523 
University and Educational Intelligence ..... 524 
Societies and Academies Ths, ) ayn ire eee 
Diaryomsocieties: . .. «sarin aren nome 
528 
