694 

Edmond Perrier; Remarks on the preceding paper.— 
Armand Gautier: Remarks on the same note of V. 
Galippe. 
August 9.—M, Ed. Perrier in the chair.—J. Comas 
Sola: Stereoscopic photography in the study of the 
proper motions of stars. The method is based on the 
extreme delicacy of the eyes, which are capable of 
producing sensations of relief by displacements of the 
order of 1m to 2m, even making use of an ordinary 
stereoscope. Placing in a_ stereoscope two corre- 
sponding images of regions near star cluster M..11, 
one taken July 12, 1912, and the other July 20, 1915, 
numerous stars show in relief. In a surface of 20° 
square, no fewer than 200 stars give evidence of move- 
ment after three years. ee Tadee Banachiewicz: The 
method of Olbers and multiple solutions.—Arnaud 
Denjoy: The four fundamental cases of derived num- 
bers.—J. Vallot: Correction for the error introduced 
by the containing vessel in the determination of the 
diathermic power of liquids. The usual method of 
correcting for the effects of the containing walls is 
erroneous, owing to reflections due to the different re- 
fractive indices of glass and liquid. A slight modification 
of the usual measurements eliminates this error. Albert 
Gascard and Emile Beignot-Devalmont : The localisation 
of projectiles by radfiography.—F. Bodroux: A method 
of preparation of hydrocarbons of the formula 
(C,H,),CH.R, R being an aromatic nucleus. Phenyl- 
magnesium bromide and bromodiphenylmethane react 
readily in ether solutions giving triphenylmethane. 
Paratolyldiphenylmethane and —_a-naphthyldipheny1- 
methane can be prepared with good yields by a similar 
reaction.—E. Léger: The resolution of B-nataloin and 
B-homonataloin into their optical isomerides.—I. 
Pouget : The use of aluminium in preventing deposits 
in boilers. It is well known that laboratory water 
baths provided with arrangements for keeping a con- 
stant level, when fed with hard waters are put out of 
action through the feed tube becoming choked with 
scale. The author has used a water-bath, painted 
inside with aluminium paint, for three years, nearly 
continuously, without stoppage, and gives the results 
of experiments showing that the presence of aluminium 
greatly diminishes scale formation—MM. Russo and 
Tussau: Geological expeditions through central 
Morocco.—Emile Belot : The deficit and excess of the 
acceleration of gravity on continents and islands with 
respect to the isostatic condition of the earth’s crust. 
—Henry Hubert: The climates of western Africa.—F. 
Garrigou ; Waters containing chlorides and iodides, 
bromides, sulphides and metals at Beaucens (Hautes- 
Pyrénées). —Mme. A. Laborde: The action of radium 
on vicious scars resulting from war wounds. The 
radium radiation was used after filtration through 
o5 mm. of platinum, and from the results of the 
cases described the conclusion is drawn that the 
radium treatment may be recommended to set free 
nerves or tendons included in cicatricial tissue, with- 
out any danger of forming fresh adhesions.—M. 
Marage : Contribution to the study of deafness result- 
ing from war wounds. The deafness results from 
lesions of the auditive centres, either new or of a kind 
very rarely observed. These lesions are due either to 
direct shocks on the cranium or to a sudden displace- 
ment of air.—Henry D. Dakin: Certain antiseptic sub- 
stances containing chlorine suitable for the treatment 
of wounds. In studying the germicidal power of anti- 
septics, it is necessary to take into account the effect 
of the presence of serum and proteid material in 
modifying the action. An antiseptic should be soluble, 
not precipitable by proteids, and possess a minimum 
toxic power and local irritating action. Hypochlorites 
fulfil some of these conditions, but are irritating and 
inconstant in composition. These two drawbacks can 
be overcome by using a solution of sodium hypo- ! 
NO. 2390, VOL. 95| 
NATURE 



[AUGUST 19, 1915 
chlorite prepared in a manner detailed. The sodium 
salts of benzene and toluene sulphochloroamides can 
also be advantageously used as antiseptics. Their 
aqueous solutions can be used under higher concen- 
trations than hypochlorites, and are very slightly toxic. 
—R. Anthony: A brain of a foetus of the gorilla.— 
Edmond Bordage: Histolytic phenomena _ observed 
during the regeneration of the appendices in certain 
Orthoptera. 

BOOKS RECEIVED. 
Elements of Finite Differences, also Solutions to 
Questions Set for Part I. of the Examinations of the 
Institute of Actuaries. By J. Burn and E. H. Brown. 
Second edition. Pp. 289. (London: C. and E. Lay- 
ton.) Ios. 6d. 
Mededeelingen van de Rijksopsporing van Delf- 
stoffen. No. 6: The Pliocene Floras of the Dutch- 
Prussian Border. By Clement Reid and Eleanor M. 
Reid. Pp. 178+plates xx. (The Hague: The Insti- 
tute for the Geological Exploration of the Nether- 
lands.) 

CONTENTS. PAGE 
The Book of France. By Sir T. E. peiei, C. Ba 
F2RiS:.-: bee sen 667 
CEnothera and Mutation. .......... . . 668 
Evolution the Other Way About. ...... 3 669 
Electricity’ for the ‘Farm ©2525 70 670 
Principles of Stock-Breeding. By Prof. James 
Willson et <i.) sten Seceied seem Re 3 671 
OurBookshelfi .) << < cu -memne et as nc 672 
Letters to the Editor:— 
Colour Sensation.—Dr. John Aitken, F.R.S.. . . 673 
‘*The History of Upper Assam, Upper Burmah, and 
North-Eastern Frontier.”—Lieut.-Col. Godwin. 
Austen FAR?S: <2 opiate mn oe 673 
Moustier Implements and Human Bones in Suffolk.— 
aE Reid’ Moir 4 aes ee ene ee 674 
The Gas Industry and Explosives ........ 674 
The Electronic Theories of the Properties of Metals, 
Byserof) CH. Lees, bakacu pene 675 
The Sterilisation of Water. By Profs Risk. Hewlett 677 
The Late Prof. J. Cook Wilson -..... Mn Aaa 3)yfr/ 
INotest ee fon 2. see cites . 678 
Our Astronomical ‘Column :— 
AuionistiMieteors =<. <) ier aie kelley ge 683 
Dhe*Detroit Observatory). 1-use) etn eye ee ee 683 
Occultation of 8 Scorpii by Jupiter (1876) . . . . . 684 
Dhe Higure} of the! Harthie sey eee ee 684 
Meteorology of the Moon. .... . enor 3 heey! 
RiiGoronz) Borealis’... > spe) eee 684 
The Pretoria Meeting of the South African Asso- 
GEVSO 5 & GYatordloeo 6.0 ° «. ty OSA 
Tropical Diseases: Statistics and Research 686 
Recent Entomological Research. By G. H.C. 687 
The Natural History of Corundum........ 688 
Ancient Arabic Meteorology... ..... .- 688 
Competitions in Connection with the Utilisation 
and Denaturing of Spirit or Alcohol for Indus- 
trial Purposes 689 
Grants for Scientific Investigation and University 
Works's (fir s+ 3 fo 5 SuRReeRe nL mee an momen 690 
University and Educational Intelligence ..... 692 
Societiesiand"Academies ~ >= i. eee 693 
meen te > taro 6 & 94 
Books Received 


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