520 

use of X-rays.—C. Guichard: Triply indeterminate 
systems of spheres, circles, and double points.— 
Jules Andrade: An arrangement of four regulating 
springs producing a constant friction and a quadratic 
friction —J. B. Senderens: The catalytic dehydration 
of alcohols by dilute sulphuric acid. Both the 
ether and substituted ethylene can be prepared by 
the action of sulphuric acid on the corresponding 
alcohol, and the ratio of ether (alkyl oxide) to 
ethylene can be varied by the addition of water 
to the acid.—Ph. Glangeaud: A trial boring for 
petroleum at Crouelle, near Clermont-Ferrand (Puy- 
de-Déme). The boring was taken down to 856 metres, 
and full details of the strata met with are given. 
At 596 metres there was a strong evolution of 
inflammable gas and about a ton of a heavy oil 
was collected (density 0-963, sulphur 9-3 per cent.). 
More oil, in smaller quantities, was obtained at 
greater depths. The tube was broken by an accident 
at 787 metres.—M. Emanuele Paterno was elected 
foreign associate, in succession to the late Prince of 
Monaco.—Georges Bouligand : Some points in func- 
tional analysis.—W. Margoulis: The general theory 
of the representation of equations by means _ of 
mobile elements.—J. Haag: The problem of » bodies 
in relativity——Henry Hubert: A method, considered 
as new, for the stereoscopic representation of topo- 
graphical surfaces.—R. Dufour : High trequency 
induction furnaces.—A. Leduc: A new improvement 
of the equation of state of gases.—Léon and Eugéne 
Bloch: Spark spectra of higher order. A study of 
the spectrum of mercury obtained by the oscillating 
discharge in a silica tube without electrodes. The 
appearance and number of lines change as the 
voltage increases.—C. E. Guye: The kinetic inter- 
pretation of the rule of van’t Hoff—Réne Audubert : 
The action of gelatin upon concentration cells. 
A study of the effect of the progressive addition 
of gelatin on the E.M.F. of the concentration cells 
AgI—AgNO, ; AgCl—AgNO,; Ag.S—AgNO;. The 
results appear to show that the Ag ion is adsorbed 
by the gelatin—L. Bert: A new synthesis of 
cumene and /-cymene. Isopropyl sulphate reacts 
with C,H;MgBr giving cumene: the magnesium 
derivative of p-bromotoluene with isopropyl sulphate 
reacts similarly, giving p-cymene.—Emile André: 
The acid-alcohols contained in the oil from grape 
stones.—Henry Joly: Some peculiarities of the 
Bajocian in the neighbourhood of Montmédy (Meuse). 
—Ch. Maurain: Magnetic measurements in Brittany. 
The results of observations made at forty-one stations 
in August and September 1922, and the magnetic 
elements (declination, inclination, and horizontal 
component) reduced to January 1, 1922.—Filippo 
Eredia: The temperature of the air in the province 
of Tripoli—L. Blaringhem: New facts relating to 
the hybrids of wheat and A2gilops—H. Colin and 
Mlle. Y. Trouard-Riolle : Dissociation of the hybrid : 
smooth-bearded black barley and Albert barley.— 
Lucien Daniel: Regeneration of the potato by 
grafting. An account of attempts to increase the 
resistance to disease of the potato by grafting on 
tomato. The experiments have given promising 
results.—A. Polack : The accommodative compensa- 
tion of the chromatism of the eye. Insufficiency 
of d’Alembert’s theory.—L. Garrelon and D. 
Santenoise: Relations between the resistance of the 
organism to poisons and the rapid modification of 
the oculo-cardiac reflex. Contribution to anti- 
anaphylaxy.—Marc Romieu: Contribution to the 
comparative histology of striated muscle.—Mme. J. 
Samuel Lattés: The physical conditions which 
accompany the phenomenon of necrosis produced by 
radium radiation. 
NO. 2789, VOL. I11| 

NATURE 


[Apri 14, 1923 

Official Publications Received. 
Report of the Rugby School Natural History Society for the Year 1922. 
Pp. 52. (Rugby.) 
Calendar for the Year 1922. Pp. 
The National University of Ireland. 
viii +3823+334+86. (Dublin.) 
Vol. 9, Part 3: The Sphegide of 
Vol. 9, 
Annals of the Trausyaal Museum, 
South Africa. By Dr. George Arnold. @Part 2. Pp. 143-190. 
Part 4: The Sphegidie of South Africa. By Dr. George Arnold. Part 3. 
Pp. 191-253. (Cambridge : Printed at the University Press.) . 
Stonyhurst College Observatory. Results of Geophysical and Solar 
Observations, 1922. With Report and Notes of the Director, Rey. A. L. 
Cortie. Pp. xv+43. (Blackburn.) J 4 
‘Annuaire de l'Observatoire Royal de Belgique, 1924. Pp. vi+550, f 
(Bruxelles: M, Hayez.) 
a 

Diary of Societies. 
MONDAY, Apriv 16, 
RoyaL GEoGRAPHICAL Socrety (at Lowther Lodge, Kensington Gore), 
at 5.—W. Irwin: The Salts of the Dead Sea and River Jordan. 
RoyaL CoLLEGE OF SURGEONS oF ENGLAND, at 5.—Prof. Shattock : 
Demonstration of Specimens Illustrating Repairs of Fractures. 
British PsycHoLocicaL Society (Industrial Section) (at University 
College), at 6.—Dr. G. H. Miles: Rest Pauses. 
RoyaL Society oF Arts, at 8.—E. Kilburn Scott: The Fixation of 
Nitrogen (2). (Cantor Lecture.) 
Cuemicat INpustry Ciur (at 2 Whitehall Court), at 8. 
TUESDAY, Apri 17. 
Royat Instiretion or Great Brirary, at 3.—Sir Arthur Keith: The 
Machinery of Hunan Evolution (2). How Old Structures are Lost. 24 
Roya Society or Mepicrye, at 5.—General Meeting. va 
RovAL STaTISTICAL Socrery, at 5,15.—Dr. E. C. Snow: Trade Forecasting — 
and Prices. « 
Roya Society oF Meprcrxe (Orthopxdies Section), at 5.80. 
INSTITUTION OF CIVIL ENGINEERS, at 6.—Special General Meeting. \ 
INSTITUTE OF MARINE Enaineers, Inc., at 6.30.—R. Clark : The Opera- — 
tion of Water-tube Boilers for Cargo-Passenger Ships. y 
RoyaL PHOTOGRAPHIC Society oF GREAT Britain, at 7.—J. C. Dollman: 
Difficulties in Painting and Photography. 
RovaL ANTHROPOLOGICAL INsTITUTE, at 8.15,—Miss Tyra de Kleen: The 
Ceremonial Dances and Magic Rites of the Island of Bali, Dutch East 
India. 
WEDNESDAY, Aprnrit 18. 
Roya Merrorovoercat Society, at §.—W. H. Dines and L. H. G. Dines: — 
‘An Examination of British Upper Air Data in the | 
Norwegian Theory of the Structure of the Cyclone. — Tatuo Kobayasi : — 
The Mevhanism of Cyclones and Anti-cyclones.—Capt. B. ©. Shankland: — 
Notes on the Fluctuations of Mean-sea-level in Relation to Change of | 
Atmospheric Pressure, from Observations at Liverpool, August and | 
September 1920, ; 
GroLoarcat Society or Lonpon, at 5.30.—J. F. N. Green: ‘The Structure — 
of the Bowmore-Portaskaig District of Islay. - , yh 
Rovan Microscoricat Society, at 8.—D. W. Cutler: The Protozoa of 
the Soil.—Prof. A. C. Seward: The Use of the Microscope in ‘Palwo- 
botanical Research. a 







THURSDAY, Apri 19. yd 
Roya INSTITUTION OF aed ee at 3.—Prof. A. O. Rankine: 1 
Transmission of Speech by Light (2). 
LInneAN Socrety oF Lonpon, at 5,—E. Heron-Allen and A, Earland: — 
The Foraminifera of Lord Howe Island, South Pacific.—The General — 
Secretary ; The History of Botanic Illustration in Colour during Four 
Centuries. * ay 
InstiTuTION OF MINING AND METALLURGY (at Geological Society of ; 
London), at 5.30. xe 
Socrery FoR Constructive Birt Controt AND Racial PROGRESS (at. 
Essex Hall, Strand), at 8.—C. E. Pell: Is the Fall in the Birth-rate a — 
Natural Law? Y; 
CuemicaL Society, at 8.—R. Ibbotson and J. Kenner: The Influence of — 
Nitro-groups on the Reactivity of Substituents in the Benzene Nucleus. 





























Part VII. Reactions of 2:5- and 4: nitro-m-xylene.—S. F. Birch, — 
G. A. R. Kon, and W. 8. G. P. Norris: The Chemistry of the Three 
Carbon System. Part I. The Influence of the Cyclohexane Ring on, me 
ap-8y Change.—S. Medsforth : The Promotion of Catalytic 
Part I. 
FRIDAY, Aprit 20, 
Royat Socrery or Arts (Dominions and Colonies and Indian Sectio 
at 4.3 Sir Richard A. 8. Redmayne: The Base Metal Resoure 
the British Empire. : 
RoyaL COLLEGE oF SuRGEONS OF ENGLAND, at 5.—Sir Arthur fk 
The Shape aud Relationships of the Stomach. 
INSTITUTION OF MECHANICAL ENGINEERS, at 6. . 
Juntor INSTITUTION OF ENGINEERS, at 7.30.—H. H. Munro: The Busin 
of Engineering. 
INSTITUTION OF ENGINEERING INSPECTION (ab Royal Society of A 
7.30.—C. H. Richardson : The Inspection of Ball se 
Rovat Puoroorapnic Society oF Great Brita, at 8.—J. Sewell : 
Commercial Aspects of Pictorial Photography. ‘ 
Roya Society oF Mepicrne (Anesthetics Section) (Annual G 
Meeting and an Ordinary Meeting), at 8.80.—Dr. J. H. Chaldecott 
others: Discussion on Coroners’ inquests; the Classification of Ant 
thetic Deaths as violent or unnatural. ‘ 
Royat Socrery oF Mepicixe (Hlectro-The 
Dr. R. W. A. Salmond: A case illustrati 
cardium. “j 
Roya Institution or GREAT Brivaty, at 9.—Dr. W. J. 8. Lockyer 
Growth of the Telescope. * 







rapew 
ng the value of Pne 


