December 21, 191 1] 



NATURE 



269 



jjlanets. The similarity between the disturbances in the 

 atmosphere of Jupiter and the sun is pointed out, and also 

 I he importance of extending these observations to other 

 lanets.- — M. Tzitzeica : The R networks. — Maurice 

 Potron : Some properties of the linear substitutions with 

 Loetlicient? ^o and their application to the problems of 

 production and wages. — Louis Roy : Viscosit)' in the move- 

 ment of flexible membranes. — M. Girousse : The protec- 

 tion of installations with weak currents against disturb- 

 ances due to alternating currents. Supplementary to an 

 earlier note on the same subject. The limits between 

 which the electromotive force and frequency of the disturb- 

 ing current may be varied have been worked out. — A. 

 Guillet : The measurements of small displacements by 

 electrical means. The electrical method proposed is based 

 on the mutual induction of two circuits, and is of the same 

 order of delicacy as the micrometer screw or the optical 

 interference method. — H. Pecheux : The resistance and 

 thermoelectricity of tantalum. From the examination of 

 three wires of different purity, the conclusion is drawn 

 that the specific resistance and thermoelectric power of the 

 tantalum increased with the purity. — P. Vaillant : The 

 variations in the conductivity of a phosphorescent body 

 under the action of light. — J. Carvallo : The conductivity 

 of pure ether. By careful purification of the ether and the 

 glass apparatus, the electrical conductivity was reduced to 

 less than one-tenth that found by Schroder. Even this 

 figure is regarded by the author as too high, and he 

 'n->Hlci-s that it is itniinssihlc to stud\- coni()1i'ifl\ the con- 

 (lurtivity of Dure ether in glass vessels. — (irorgrs Meslin : 

 The use of doubly refracting prisms for obtaining inter- 

 ference fringes. — A. Lafay : The phenomenon of Magnus. 

 A study of the effect pi^oduced by a currenl of air (lii'i'cted 

 normally against a cylinder rotating with a V(r\ liigh 

 velocity. — .\ndr^ Brochet : Plotting the lines of ecjual 

 potential in an electrolyser. — Eugene Fouard : The 

 m-chanism of osmosis. The experiments described are not 

 in accord with the usual interpretation of the isotonic 

 coefficients of de \'rles, nor with the views of fiirard and 

 Henri. — G. Urbain and V . Bourion : Europous chloride. 

 Europic chloride, EuCl,, was first prepared in a pure state ; 

 this, reduced in a current of hydrogen at a temperature 

 between 400° C. and 450° C, givo^ the lower chloride 

 I-'uCl^, the prop-Arties of which are di'scribed. — P. 

 Gaubert : The indices of refraction of mixed liquid 

 crystals. — J. Tournois : The formation of embryos in the 

 hop bv the a tioTT of the pollen of hemp. Tt has been 

 fdund that tie tiosphere nf the hop roniniences to segment 

 iinil>r the action of Ivinp pollen. This development only 

 ai);!'-'!--, utifler favmiralile conditions of nutrition, and even 

 uii'ler I he Ite^i condilion^ the development is always limited, 

 'h. Qravier : Sexual dimorphism in the Capitellians. — 

 .'\. Vaissi&re ; The Opisthobranchs and the inarseniads 

 of ih'- Gulf of Tadjoiitnh. Fd. Chevreux : The aniphi- 

 piid- of tlv French Antanlic expi'dii ions.-— .\Tiecz\slaw 

 Oxner : Tin- b'ological anal\'-i< of a serir^s of experiments 

 concrniiie \\\( altaininenl of ~.xual maturity, i-egcii. ra- 

 tion, and inanition in I.iiirus ruhrr anrl I.. Inclcus. K. 

 Goupil : fxesearclies on .1 »; v/e)iM'i e\ I\()uxii. — Mile. 

 Robert : The influence of c.alciuni on ih' development and 

 min'tal con. position of A s[irrililliis iii^rr. Within the 



mg. calcium) calcium 



limits of .accuracy I'uiploved (, 

 doet not appear to have anv innuencc 

 "f ihi-- ruonlii.- M. Javillier and 1!. 

 iivl--I}'ii-^ah!e lo tlie form.alion of 



I /■',<,'///»> iiii^rr? — Raphael Dubois 

 Porvinquidre : The geology of tli 



-oei ialK- i, (hi' neighhourhooi 



n tile develo|)nient 



Sauton : [■^ iron 

 (he i-onidia of 

 Atmol\siv. l./'on 



xtrenie south of Tnnis. 



of f ili.'idanie^. l-jnije 



A 



■ f (h 



HauK : 

 r.-\yeux 



lihieraK 

 ' Franr... p 

 -a>l .,f (he f 

 ■'.ilava- and C; 

 \oveniber if). 



Derember 1 1 

 van Tieerhem 

 i' Villard 



.f Ml 



"oniprnason 

 Pnited S(; 

 Thoulot : 



'.nlf of I. VI 

 iiii' f'ren-,. 



■(\Vi 



and (lareonll (V 

 ■n (he I I Lii'i ini; 



. and (he 01 

 h.adivlltliol, 



h.'tUei.n S 



. Rothe 



ron niinei-aK 

 map of th»' 



)(.--M 



dh 



aL. 



M. \ 



nd 



N' ). 



I')'), vol 



'^i;in( ii'i' in 

 rl.aeea-, a ivw fai 

 Abraham : I h' 



fwi-en ?o,i,(,o an 



nerl ,J ,,l;nie. ,,f 



' •■ plo-;-.-!' iioleniia! 



881 



I hair.— Ph. 



d lnn\aile;r. 



uii mini ( if 



is a linear fini 



tion of the distance of the electrodes. .A similar relation 

 has also been shown to hold for the case of spherical elec- 

 trodes carried to symmetrical potentials. — Paul Sabatier 

 and A. Maiihe ; The preparation of the alcoholic amines 

 by catalysis. An extension of the general method described 

 in an earlier paper, the catalytic action of thoria upon a 

 mixture of the vapours of the alcohol and ammonia. 

 Isopropyl alcohol gives isopropylamine, with a little di-iso- 

 propylamine, and diphenylcarbinol gives aminodiphenyl- 

 methane. Numerous amines have been prepared, starting 

 with cyclohexanol and its homologues. A modification of 

 the catalytic process is described in which the ammonia is 

 replaced by a primary amine ; good yields of mixed 

 ladary a. nines are obtaim d. — 1- . Quemssct : Idioio- 

 graphs of the planet Venus obtained at the Observatory of 

 Juvisy. The photographs demonstrate for the first time 

 the existence of spots on the surface of this planet. — 

 Kyrille Popoff : A cause which may have an influence on 

 the estimation of the magnitude of stars. It is suggested 

 that the luminosity of that part of the sky in which a 

 star i^ situated may be a cause of the discrepaiu\ bet\\cei\ 

 the visual and photographic determination of magnitude. — 

 Flenri Renan : Results of the discussion of observations 

 made by MM. Lancelin and Tsatsopoulos for determining 

 by wireless telegraphy the difference of loneiuKii hiiwe.ii 

 Paris and Bizerta. The usual method has hi. 11 nmdiiied 

 by the introduction of an automatic recording in^n iiment 

 for the method of passages. The personal 1 Ljuaiion is 

 greatly reduced, as is shown in a set of observations given. 

 — A. Soret : A bilateral magnetic audiphom.- ( .. Rcboul : 

 Photographic impressions on copper. .\ plate of jiolished 

 copper, after coating with a very tiiin la\er of rliloride or 

 bromide by exposure to the vapours of clilorine or lironiine, 

 will give a positive after exposure to sunlight under a 

 negative. The image is not permanent, even in the dark. 

 — Jacques Duclaux : The absorption of gases by ]iorous 

 bodies. — Daniel Berthelot and Henry Gaudechon : i In- 

 stability of various types of smokeless powder towaids the 

 ultra-violet rays. It is shown that the ultra-viol, i rays 

 from a quartz mercury vapour lamp acceler.Ui^ tli. spon- 

 taneous decomposition of smokeless powdr-. i'iiis 

 promises to be a valuable method of in\!-.!ii;at:ne ihe 

 stability of smokeless powders, supplementing tin 1 -1- at 

 present in use. — A. Recoura : A comhination ol h nic 

 sulphate and alcohol. Contribution to the const iuii ion of 

 ferric sulphate. — Marcel Guichard : Tiie form.ulc 

 decomposition of anhydrous bodies: the (a-. o 

 anhydride. — A. Behal and A. Detoeuf : I 

 monochlorurea upon ketones. Monochlorui 

 solution gives with ketones good yields of 1!;. ;n>.i 

 ketones. The preparation of several of (h. -. i- .h 

 and also of the corresponding semic.n ha/on. s- 

 Vig:uier : Some derivatives of tetrolir aldehMh 

 acetal. — G. Andr6 : The soluble suhvt.ance- .u.-u: 

 the plasma of tubercles of the potato. d'h- ni' 

 potato were immersed in ether-, .-uid the ruim on- ■ 

 (luis expelled collected and .-nialw.d for nitroi^. p., 

 •id, and potash. — Lecl.i-e du Sablon : I ii. 



phot-ii 



pir.-ition of cactus plants . ih 



Desg-rez, P. Rcg-nior, rmd 1' 



'ni I h\ lannne ehloidhv di al .■ 

 In exp.-rinieiits on guinea-pigs 

 ilorohvdrale i-au-ed :, r.duelii 

 tions and an inn-eas.- in the di'-dmti 

 pounds. — C. Gessard : Tin- 

 tion of the blood. A -lu.K .d 

 (hasiase and c.-ilcium -ah-- I in 

 eoagiilaiion of albumin h\ hiat 

 point of view of the estimation 

 d he whole of the albumin i- noi 

 .•ilher in pri'-.eiiie of .-!. id-, or . !• . 

 an- ohtain.d U\ ii-in;'; I an! . I '- ' 

 \ (h.-i( ih. -.■ hi:.' 

 Thooria : \ u 

 !o attilude-, and 

 |)hali.-m .'ilid ae 



and 

 iodic 

 ■; of 



.- .if 



Intion 

 phos- 

 trans- 



' intluelice of \]'J. 



:. Moogr : Till- ic'' 

 ai t III- nut i-i( i\'.' ■ ■. 

 ,-ind rahhits trim. th\ 



m in (iv nhi .1;- e. ,; 



(ion ol -ah- . - 

 f ih.- i-.'lation 

 11 in Vallcry 



a( . ( "oii-.-qiti : 

 t alhnndn 



-i\.n for ihf 

 A. Marie an 

 •angl.- aceori! 

 Rabaud : I 

 Ant*»ony .ni 

 the i^vrus r. 

 Colin : Ih. 



1 tieepiialian 

 . de Santa-Maria : I h 

 in til.- Pi ^ Rochai"' 



,d" Ih.- : l-d le lit.' 



ip up 



dl 



l^di(^ 



.1 (1 



-(al 



;iiai-|z 

 aeid- 



'he 



•i ih 



