May 25, 191 1] 



NATURE 



439 



The minimum modulus of integral functions. — M. 

 Riquier : The existence of integrals satisfying given con- 

 ditions along a contour. — Michel Piancherel : The appli- 

 cation of Laplace's series to the method of summation of 

 M. de la Vall6e-Poussin. — Louis Roy : Viscosity in the 

 motion of flexible wires. — H. \Grsr\& : A developmeni in 

 series and its application to the problem of liquid waves 

 by emersion. — L. Hartmann : The mechanism of the 

 permanent deformation in metals submitted to extension. 

 A description of the application of the method previously 

 published to aluminium, nickel, two ferro-nickel alloys, 

 copper-nickel, and other alloys. — J. Olive: Experiments 

 made with the installation for aerodynamical measure- 

 ments of the aviation establishment of Vincennes. The 

 installation has for its object aerodynamical measurements 

 on apparatus of full size displaced in calm air. Results 

 are given for a Wright aeroplane.^M. Rabut : Partial 

 tunnelling under the Rue de Rome and Boulevard des 

 Batignolles. In the extension of the width of the line it 

 was necessary to cut under these streets, portions of which 

 were then supported on brackets of reinforced concrete. — 

 L. Houllevig^ue : A radiation emitted in the interior of 

 incandescent lamps. — A. Leduc : The work of magnetisa- 

 tion. — H. Woltereck : The production of ammonia and 

 the economy of nitrogen in peat. It is shown that the 

 treatment of peat by steam alone produces only one-third 

 the quantity of ammonia obtained under similar conditions 

 by the use of a mixture of steam and air. — G. Charpy 

 and S. Bonnerot : The gases contained in steels. A 

 source of error noted in these experiments was the slow 

 evolution of gas due to a reaction between the heated 

 metal and minute traces of water given off in the mercury 

 pump. Extra precautions against this water vapour 

 gradually diminished the continuous evolution of gas, but 

 it could not be completely stopped.— Ed. Chauvenet : The 

 action of carbon oxychloride on artificial and natural 

 sulphides. The action of carbon oxychloride upon nine 

 sulphides of different metals has been studied. The 

 temperature of the reaction was in no case higher than 

 450° C, and in each case the normal chloride was the sole 

 product. Examples are given of the application of the 

 reaction in quantitative analysis. — F. Bodroux and F. 

 Taboury : The bromination of some hydroaromatic com- 

 pounds. Cyclohexane, prepared by the Sabatier and 

 Si nd-nns method, is not sensibly attacked by bromine in 

 till ilark at the temperature of the boiling point of the 

 hydrocarbon. In sunlight the action is regular, hvdro- 

 bromic acid being evolved and a good yield of cvclohnxyl 

 bromide being produced. Ultra-violet light cannot roplare 

 sunlight in this reaction. Higher bromine derivatives woe 

 also prepared.— M. Lanfry : A dinaphthothiophcne.— P. 

 Freundler : Researches on the oxyindazoles. — G. 

 Gauthier : The synthesis of tertiary a-ketonic alcohols. 

 Cyanhydrins are first prepared by the interaction of hydro- 

 cyanic acid and ketones, and these treated with an alkvl 

 magnesium iodide. Three examples of the application of 

 this genoral method are given. — A. de Schulten : The 

 crystallographic examination of some fluorides obtained bv 

 M. Henri Moissan and his pupils. — V. Vermorel and E. 

 Dantony : .An nnfirn'ptogamic colloidal copper solution. 

 Full details for the preparation of the nr-w solu- 



tion, which certain advantages over those in 



current use.— M. Maragre : Contribution to the study of 

 consonants.— N. A. Barbieri : The mobility of ne'uro- 

 plasma. — Pierre Lesne : The battle against the caterpillar 

 Zcuzcra pyrina.-^K. Bataillon : Embrj'ogenesis provoked 

 in tlie virgin egg of .Amphibia bv inoculation with the 

 blodd O!" spi'i-m of a mammril. Trautn:i! ;- p.n ''i- in .-i n, sis 

 and inipni^'nafiun without ;miphiini\i,i. MM. Bordas 



The original acidity of mil! 

 of milk, using phrnolphtha! 



Arinrnid Gnutinr 



and Touplain 



firigliial acirlit' 

 indicator, is ''• 

 Mostowski 

 I'.. Kayser : i ; 



Mav 15.— M 

 Deslandres and V. Burson : T!i 

 movements of thp solar p 

 displacement of tli' K ' 

 appear to correspond with li 

 of rotation increases with 

 layers immediatelv ahove th 



Tin 



M. St. 

 one. — 



■■ a^-ii;np: ;i>'i 

 the ahitiide, 

 (•hronias])lier. 



chair. — H. 



latitig to the 



"Iv of th-- 



- -.1, served 



! !iie velocity 

 least in the 

 No !ii<ht has 



been thrown on the question as to whether the displace- 

 ments east and west are equal or unequal. — J . 

 Carpentier : The ophegraph, designed by M. Guillery. 

 An account of an instrument for drawing tangents to a 

 given curve by mechanical means. By means of this 

 instrument, given a curve representing a function, the 

 curve of the first differential of this function can be 

 obtained graphically. — ^A. Blondel : Harmonic functions 

 determined by certain conditions at the contour. — A. 

 Chatelet : Abelian bodies of the third degree. — Ch. 

 Bertin : A table of positions for purposes of navigation. 

 — Captain Duch&ne : Good control of the aeroplane in air 

 in motion. A description of two additions to an aero- 

 plane, one designee' .or preserving longitudinal equilibrium, 

 the other for transversal equilibrium. — M. Yvon : Cata- 

 photography. Remarks on a recent publication of .M. 

 Guillaume de Fontenay. — Guillaume de Fontenay : Cata- 

 pliotography. Acknowledging the priority of ^L Yvon. — 

 -M. de Brogrlie : A particular case of distribution of 

 ionisation in a gas. A very thin superficial layer contain- 

 ing ions of both signs. In the case of the ionisation of 

 air by sulphate of quinine at the surface of the salt during 

 the variations in hydration, there is an infinitely thin 

 layer containing a high density of ions of both signs. — 

 L. D#conribe : A physical interpretation of non-compen- 

 sated heat. — H. P^labon : The resistivity of the selenides 

 of antimony. From measurements of the specific resist- 

 ances of various fused mixtures of antimony and selenium 

 it was hoped to get some evidence as to the existence of 

 definite compounds of these two elements. It was found, 

 however, that the differences in resistance caused by 

 tempering or annealing were so large that no definite con- 

 clusions could be deduced from the experimental figures. — 

 A. Rosenstiehl : Some historical data relating to osmotic 

 pressure. — Marc Landau : The action of the ultra-violet 

 rays upon lactic acid. The gas evolved was mainly carbon 

 dioxide, with some carbon monoxide. Ethyl alcohol, 

 together with traces of pyruvic acid and an aldehyde, were 

 detected. — Camille Matignon : The presence of zinc 

 nitride in zinc dust and in commercial zinc. Zinc nitride 

 appears to be present in all commercial samples of zinc 

 dust. It is also met with, although in extremely small 

 quantities, in certain solid zincs. — Pierre Jolibois and 

 Eugene L. Dupuy : The definite compounds of arsenic and 

 tin. From the metallographic study of a series v' 

 of tin and arsenic only two compounds could be . 

 defined. These had the composition of Sn^.As, and Sn.\s. 

 — G. Darzens : A new method for the csterification of 

 alcohols by the hydracids. The alcohol is treated with 

 thionyl chloride and a tertiary base (B) such a^ di. thyl- 

 aniline, quinoline, or pyridine, when the reaction 

 R.OH-|-SOCij-t-B = RCl-i-SO, + B.HCl 

 takes place quantitatively. A similar reaction with 

 .SOBr^ gives good yields of bromides.- — .\. Petit : llie 

 fixing of phosphoric acid by the organic matter of tlie v,,il. 

 Soils rich in organic matter do not fix any ajiiirrciable 

 amounts of phosphoric acid. — P.ud Becquerel : The sup- 

 posed production of new plant forms !iy tlie method of 

 traumatisms. The auihoi' conckiiles iha! ueiiii. r in liis 

 own e.xperimeiii s with Zinnia nor those ol M . Hlaringheni 

 with maize have new forms been really produced. 11. 

 Haliopeau : The region of primary invasion of s\i>lin's. 

 — .Albert Berthelot : Researches on di-iodot\ losine ami ii- 

 possible utilisation in therapeutics. l",\]>eriiiieni^ made 

 with 3 : 5-di-/-iodotyrosine showed that it is well lojeraied 

 by man and by animals, and promises to be a u-^eful means 

 of introducing relatively large quantities of icnline into ihe 

 body without prejudicial after ft'fe( is.- Jules Amar : Walk- 



ing on an inclined plane.- IV Ac 



The influence of the \' • ' 

 .actions. .\n inrre.a-.^ 



duced by the addi; ■,< 1 ., .: . 

 influence on di.i-ialie aelion wh; 

 with the varial ioM- ;:j: : ■ .ihi, , .j ' 



discussion < 

 is resei \-efl 

 parai'-. 

 .and ; 



of reuiliM'H 

 is repeated!' 

 lu- vhakin'' 



ml M. Bresson 



iin upon 'i' 



the liui; 



f till 

 f.M- 



i' redui e(I li\- amnioniuni sulphide 

 witii air, after twentv-five or thi 



NO. 216^), VOL. 86] 



