324 
Barnard noted a star on the photographs made at 
the Yerkes Observatory with an annual displacement 
of 10-3”, the largest known. This star has been found 
in the photographic catalogue of Algiers, and gives 
an annual displacement of 10-286’. It is the nearest 
star known; its parallax corresponds to 3-26 light 
years. Full details of the method of reduction will 
appear shortly in the Bulletin Astronomique.—Ch. Ed. 
Guillaume ; Modifications of the expansibility of invar 
by mechanical or thermal actions. Both’ in annealed 
and tempered invar wires 
rapid lowering in the coefficient of expansion; the 
coefficient is also affected by the heat treatment. Pro- 
longed heating to 100° C. not only renders the condi- 
tion of the metal after wire-drawing stable, but gives a 
material with a coefficient of expansion which is prac- 
tically zero under the tension used in geodesic opera- 
tions, and hence eliminates temperature errors.—G. 
Keenigs: The general geometrical form of the proper- 
ties of the second order of plane movements with two 
parameters.—M. Mesnager : Formula of the thin plate, 
with edges fixed on a plane rectangular contour.—L. 
Fabry and H. Blondel : The elements of the planet dis- 
covered by M. Sy at Algiers, May 26, 1916. It is 
proved that'the elements of the Sy comet do not coin- 
cide with those of 562 Salomé. It would appear prob- 
able that this planet is new.—H. Arctowski: The fluc- 
tuations of the solar constant. It is shown that be- 
sides the sun-spots, other phenomena affect the solar 
constant in a manner sufficiently strong partially, or 
even totally, to’ mask the effect of the spots.—R. 
Ledoux-Lebard and A. Dauvillier: Theoretical and ex- 
perimental researches on the bases of radiological 
estimations. In the special formr of X-ray tube de- 
scribed by the authors, giving intense K spectra, the 
energy supplied (continuous current) being known, 
the estimation is reduced to a time measurement.— 
J. Repelin: The geology of the islands of Pomégnes 
and Ratonneau (Bay of Marseilles). The islands have 
been erroneously assumed to be a continuation of the 
massif of Notre Dame de la Garde, but are now shown 
to be constituted by Urgonian limestones arising from 
an accident altogether independent of this massif, and 
spreading out as a layer on a substratum of the upper 
Aptian.—A, Boutaric: Nocturnal radiation. A theo- 
retical expression is developed for the nocturnal radia- 
tion, the loss of heat per minute of 1 sq. cm. of a 
black surface exposed to the air. Some experimental 
data obtained at’ Montpellier in 1913 and 1914 are in 
fair agreement with the formula, and show at least 
that the results of calculation and observation are of 
the same order of magnitude.—F. Gérard: Four new 
Ochnaceze of Madagascar.__A.  Bédlére: Fhe in- 
oculability of variole in the vaccinated, but not com- 
pletely immunised, calf. 
BOOKS RECEIVED. : 
University of Sheffield. Calendar for the Session 
1916-17. Pp. 742. _ (Sheffield.) 
A Defence of Classical Education. By. R. W. 
Livingstone. Pp. xi+278. (London: Macmillan and 
Co., Ltd.) 4s. 6d. net. 
A Text-Book of Organic Chemistry for Students of 
Medicine and Biology.. By Prof. E. V. McCollum. 
Pp. xiii+426. (New York: The Macmillan Co.; 
London: Macmillan and Co., Ltd.) tos. net. 
The World as Imagination. By E. -D. Fawcett. 
Series I. Pp. xlii+623. (London: Macmillan and 
Co.,’ Ltd.). -1<s, net. 
. Decennial Index of the Analyst. 
Compiled by M. A. Baker. Pp. 733. 
kin, Marshall and Co., Ltd.) 9 ~* 
NO. 2460, VoL. 98] 
Vols. xxxi.—xl. 
(London : Simp- 
drawing down causes a | 
NATURE 
[DECEMBER 21, 1916 
What is Instinct? By C. B. Newland. Pp. xv+ 
217. (London: John Murray.) 6s. net. ey os 
The Control of Hunger in Health and Disease. By 
A. J. Carlson. Pp. vii+319. (Chicago: University 
of Chicago Press; Cambridge: At the University 
Press.) gs, net. ; 
Second-Year Mathematics for Secondary Schools. 
By E. R. Breslich. Pp. xx+348. (Chicago: Univer-— 
sity of Chicago Press; Cambridge: At the University 
Press.) 4s. net. : 
The High Price of Sugar and How to Reduce It. 
By H. H. Smith. Pp. iv+54. (London: John Bale, 
Ltd.) 1s, net. 
Highways and Byways in Nottinghamshire. By 
J. B. Firth. | Pp. xviiit+426. (London: Macmillan 
and Co., Ltd.) 6s. net. 
Some Questions of Phonetic Theory. By Dr. W. 
Perrett. Pp. vit+i1ro. (London: University of Lon- 
don Press, Ltd.) 2s. 6d. net. 
Charts: Their Use and Meaning. Prepared by Dr. 
G. H. Fowler. Pp. iv+47+ charts viii, (London: 
J. D. Potter.) 4s. 
DIARY OF SOCIETIES. 
THURSDAY, DECEMBER 21. , 
CuemicaL Sociery, at 8.—Studies on the Walden Inversion. V. The 
Kinetics and Dissociation Constant of = Src pie eee Acid: 
G, Senter and G. H. Martin.—The Alcohols of the Hydroaromatic and 
Terpene Series. ILI. The Isopulegols corresponding with /-Menthol and 
d-Neomenthol: R. H Pickard, W. Lewcock, and H. de Pennington.— 
Lead Sub-iodide, with Details of the Preparation of Lead Suboxide: 
H. G. Denham.—Note on the Solubility of Lead Iodide: H. G. Denham. 
—Chromium Phosphate: A. I’. Joseph and W. N. Rae. 
INSTITUTION OF MINING AND MEYTALLURGY, at 5.30.—The Economic 
Geology of the Insizwa Range: W. N. Goodchild, y 
CONTENTS. PAGE 
A Text-book of Human Parasitology. ...... 305 
Acoustics and Beyond PHP is % | Spe 
Morphology: Old and'New ssn eee 306. 
By By AV. Myths «oh 
Our Bookshel&¢ 1) ecb (uses tenet et vale ae + («JO 
Letters to the Editor:— 
Pre-Columbian Use of the Money-Cowrie in America. 
—H. Newell Wardle; J. Wilfrid Jackson . 308 
Field Glasses for Army Use.—Countess Roberts . 310 
Science and Industry in Australia . .. .. 310 
The Eradication of Sleeping Sickness from Prin- : 
cipe../' By]... Ws. WS, oo: oct eee . Bir 
Clement Reid, F.R.S. ove elated o.oo 
William Ellis, F.R.S. By W. W. B.. . . Se 
Notes STAs ic Meee Pes co : 313 
Romer’s Discovery of the Velocity of Light . .. . 317 
Parallaxes of Two Stars with Common Motion . . 317 
The Direct Joining of Glass at Moderate Tem- 
peratures ee Z . ie 2,15) oa 
The Exploitation of Inshore Fisheries. By Prof. 
W. A. Herdman, F.R.S. th CP Phas. 
The London Mathematical Society. By Sir Joseph - 
Larmor, M.P., F.R.S. cttw 2. te Se 
University and Educational Intelligence . . . .. 321 
Societies and Academies... ....,..... ote gee 
Books ‘Rereived’ |. :. : ue ce 6 on 
Diary of Societies ARES Site iwi 
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