372 
is shown that the species /dzophyllum rotundiflorum is a 
synonym of Meurofterts rarinervis, and that the genus Idio- 
phyllum has no status in fossil botany.—The precipitation of 
ammonium vanadate by ammonium choride, by IF. A. Gooch 
and R..D. Gilbert. Previous work on the separation of vana- 
dium as ammonium metavanadate by means of ammonium 
chloride having led to contradictory results, the method has 
been exhaustively re-examined, with the result that under suit- 
able conditions, easily realised experimentally, the determination 
by Gibbs's method is accurate.—Some additions to the alunite- 
jarosite group of minerals, by W. F..Hillebrand and S. L. 
Penfield.—The Niagara limestones of Hamilton County, 
Indiana, by Edward M. Kindle.—On the velocity and’ the 
structure of the nucleus, by C. Barus. —Note on corundum and 
a graphitic essonite from Barkhampstead, Connecticut, by B. K. 
Emerson. 
SOCIETIES AND ACADEMITES. 
PARIS. 
Academy of Sciences, September 22.—M. Bouquet de la 
Grye in the chair.—The president announced to the Academy 
the loss it had sustained by -the death of M. Damour.—The 
extension of ermat’s principle on the economy of time to the 
relative movement of light in a transparent homogeneous body 
subject to a rapid translation, by M. J. Boussinesq. It is 
shown that the principle of least time as enunciated by Fermat 
applies to the case of a body subjected to a rapid translatory 
motion. Polarisation is also unaffected. —The enclosures in the 
andesites from Mont Pelée, by M. A. Lacroix. The enclosures 
contain a greenish or yellowish-grey rock of a microlitic 
character; the mineralogical composition is always the same 
qualitatively, but the proportion of the elements varies con- 
siderably. |The most complete type contains plagioclases, 
hypersthene, augite, titanomagnetite, hornblende and _ olivine. 
These enclosures are not fragments of solid rock torn off from 
the depths of the volcano, there being abundant evidence that 
they have been formed in place. They greatly resemble certain 
nodules of hypersthene-andesite from the last eruption of San- 
torin.—Spectral researches on the rotation of the planet Uranus, 
by M. H. Deslandres. The first researches on the rotation of 
the planets have been made by simply measuring the movement 
of certain well-defined points; if the image is uniform and 
without detail, this method fails. On account of the small 
apparent diameter and feeble lustre of Neptune and Uranus, their 
time of rotation has hitherto remained undetermined. A new 
mode of attacking this problem is by applying the Doppler- 
Fizeau principle. This was first applied successfully to the Sun 
in 1889, to Jupiter and Saturn in 1895, and to Venus in 1900. 
The same method in a modified form has now been applied to 
Uranus, with the result that it is very probable that this 
planet turns in a _ retrograde sense, like its satellites. 
To obtain more definite measurements, further researches must 
be carried out in observatories nearer the equator, with more 
powerful instruments and in a very calm atmosphere, and for a 
period of twenty-one years. Encouraging results have also 
been obtained by the application of the same method to the 
planet Neptune.—On the combinations of silicon with cobalt, 
and on a new silicide of this metal, by M. P. Lebeau. When 
cobalt is heated in the presence of an excess of fused silicon, 
or when a mixture of silicide of copper, cobalt and silicon is 
submitted to the temperature of the electric furnace, a well- 
crystallised cobalt silicide of the composition Si,Co is formed, 
the physical properties and chemical reactions of which are 
given in detail. Cobalt thus forms three definite crystalline 
compounds with silicon, having the formulz SiCo,, SiCo and 
Si,Co, these compounds forming a series in all respects com- 
parable with the silicides of iron.—On the calorific power of 
coal, by M. Goutal. By an examination of 600 specimens of 
coal of different kinds, the calorific value (P) is found to be 
given, with an approximation of 1 per cent., by the formula 
P = 82 C + aV, in which C is the fercentage of ash-free coke, 
V the volatile matter, and a a coefficient, a curve for the 
determination of which is given in the paper. The error may 
amount to 2 per cent. of the calorific value in the case of 
anthracite and some lignites.—On the existence of stable yeast 
No. 1718, VoL. 66] 
NALORE 
[Ocruser 2, 1902 
forms in some moulds, by M. G. Odin.—On a modification 
produced in Scopolta carnolica following its grafting on the 
tomato, by M. Lucien Daniel. 
New SoutH WALES. 
Royal Society, August 6.—Prof. Warren, president, in the 
chair.—On the mitigation of floods in the Hunter River, by Mr. 
J. H. Maiden. The piper discusses the subject from the point 
of view of the forester. 
CONTENTS. 
Fusils de Chasse. By F. J.-S. 
The Completion of Roscoe and Senculeenmene 
Organic Chemistry. By Prof. R. Meldola, F.R.S. 
Japanese Mythology . 
Our Book Shelf :— 
Maenair: ‘‘ An Introduction to Chemistry” 
Davey: ‘‘A Tentative List of the Flowering Plants 
and Ferns for the County of Cornwall, including 
the Scilly Isles” é 
Goodrich-Freer : ‘* Outer Isles” 
“*The Fauna of British India, Including Ceylon Bnd 
Burma”’ . : St <i tese 
Letters to the Editor: — 
The Carnegie Institution of Washington, D.C.— 
PAGE 
545, 
546 
546 
Dr. Daniel C. ‘Gilman 7 5 548 
Re Vegetable Electricity.—Prof. face) Chunder 
Bose; Dr, A. D. Waller, F.R.S. 549 
British Association Meetings.—W. E, P. ; 55 
Helmholtz on the Value of the Study of Philesagive 
B. Branford oS 4 550 
Trade Statistics.—F. Evershed; Dr. F. Mollwo 
Perkin . ap i 
Bipedal Locomotion of Lizards:—Rose ae 
Thomas 551 
Rudolph Ludwig Karl Virchous By R. T. H. 551 
The Abel Festival in Christiania 552 
Mr. F. W. Rudler and the Museum of Bracueal 
Geology . . Vf.) mciMeiNeimenire) | -ukoit loti sats iii 
Notes 553 
Our atconamicall Colum — 
Ephemeris for the Search of the Comet Tempel,- 
SEER OD olio O o-oo uo oO 557 
Grige’s Comet. eae 557 
Reappearance of Eros 557 
A Remarkable Meteor 557 
Meteor Radiants . . avo 557 
Instructions on the Oeaton of the Sun. - 557 
Corrections to the Right Ascensions of the Principal 
Stars of the Berliner Jahrbuch .......~. . 55% 
Observations of Perrine’s Comet, 19020. (L//us- 
trated.) . ae is ohste rah ¢ 558 
Forthcoming Books of Science yo 0 558 
The British Association at Belfast :— 
Section I1.—Anthropology.—Opening Address by 
A. C. Haddon} MeA.) (Sc.D 2 hb Rass 
M.R.I.A., President of fio Section . 
Section I.—Physiology.—Opening Address by w. D. 
Halliburton, M.D., F.R.S., Professor of Physi- 
ology in King’s College, London, President of the 
Section 
University and Educational Tnteihpence 
Scientific Serials . 
Societies and Academies 
561 
