5'o 



NATURE 



[June 24, 1909 



of a very fine conducting point resting with a fixed 

 pressure on natural pyrites. It worl<s without a battery, 

 and has the advantage of not being injured by strong 

 waves. — The observation, made parallel to the lines of 

 force, of the unsymmetrical positions and intensities of the 

 iiiagretic components of certain lines of emission : a new 

 type of position dissymmetry : A. Dufour. — The physical 

 origin of the evolution of electricity in chemical reactions : 

 M. do BrOKlie and L. Brixard. The production of an 

 electric charge in tlio cases studied is altogether in- 

 dependent of the chemical reaction. — The magnetic 

 dichrolsm of the rare earths : Georges Mealin, — An 

 arrangement for controlling signals at a distance with or 

 without wires : M. d'lvry. A detailed description with 

 diagrams. — Comparisons between nitriles and carbamincs : 

 P. Lemoult, A thermochemical paper. — Some double 

 sulphates of calcium : M. Barre. Owing to the forma- 

 tion of the double sulphate CaSO,.(NH,)..SO,.H.O, a 

 salt which is stable between o° C. and ioo° C. in presence 

 of an excess of ammonium sulphate, the solubility of 

 calcium sulphate is largely increased in the presence of 

 ammonium sulphate. Similar results are obtained with 

 potassium sulphate. — The metallic character of an organic 

 group : R. Fosse. The pyryl group, 



forms compounds which behave with mineral acids, picric 

 acid, .-uul sulp'r retted hydroifcn_ in a manner strikingly 

 resembling meta.c salts. Pyryl bromide with hydrochloric 

 acid gives pyryl -hloride and hydrobromic acid ; pyryl 

 chloride is ^r .pitated by hydrogen sulphide, pyryl sulphide 

 forming the precipitate. Boiling hydrochloric acid acting 

 on this sulphide regenerates the chloride, sulphuretted 

 hydrogen being given off. — The action of cacodylic and 

 methylarsinic acids on antimony trichloride: L. Barthe 

 and .A. Minot. — .Aromatic alcohols and hydrocarbons 

 derived from funone : J. Leroide. — The j3-napht'hane diols : 

 Henri Leroux. — Results of the geological and minera- 



logical exploration of EgucJ-i : G. Garde The extension 



in Chaouid of the /irs, or fertile lands of western Morocco : 

 Louis Gentil. — The possibility of keeping animals a';vc, 

 after complete ablation of the thyroid apparatus, by adding 

 salts of calcium or magnesium to their food : .Mbert 

 Frouin. — k method permitting the measurement of the 

 dehydration of the organism by the lungs and the skin. 

 The variations of this dehydration with altitude : H. 

 Guillemard and R. Moogr- The loss of weight of the 

 body in unit time is smaller in the mountains than in 

 the plains, and this is also the case with the amount of 

 \yater eliminated. — Cardiac arythmia and d'.Arsonvalisa- 

 tion : E. Doumer and G. Lemoine. — The treatment of 

 intermittent claudication and of gangrene of the lower 

 extremities by d'Arsonvalisation : A. Moutier. — Some 

 biological properties of the linn'lliis fiidolhrix : Fernand 

 Gudgruen. — A new case of hermaphroditism in Oirstcidia 

 ruslica : Mieczyslaw Oxner. — Demonstration of the exist- 

 ence of an artificial deformation of the skull at the Neo- 

 lithic epoch in the Paris basin : Marcel Baudouin. — The 

 geosyncMnals of the chain of the .Alps during Secondary 

 times: ]:mile HaiiST, — The earthquake of June it, ioo<) : 

 Alfred Angrot. This earthquake was completely registered 

 by the seisinograph at Pare Saint-Maur, and communica- 

 tions have been received frpm nine other observatories 

 giving the times recorded. 



DIARY OF societies: 



THURSnAV, Jim jj. 

 Royal Societv, at 4.30 (Meeting .it the Roval .•\>lronomic.nl SocictyX— 

 (i)On P^c^5u^c PcrpcndicuUir to the Shear PInncsin Finite I'ure .She.irs ; 

 .-ind on the LenRthening of Loaded Wires when 'r«iste<l ; U) The Wave 

 .Motion of a RevoIvinR Shaft, and a Sufzwestion as to the Angtilar 

 Momentum in a Be.im of Circularlv I'..liiri.*ed Light : Prof. I. H. 

 Poynting, F.R.S.— The Effect of a Masnclic Field jn the FJectrical 

 Conductivity of Flame: Prof. H. A. Wiljon. F.R.S.— Studies of the 

 rro..;.,,-. O,., ,.„v,: Ir, %Am\,,n-.. XI.— The DisBlacemenl of Salts from 

 S' I- : Prof. H. E. Aimsirong, F.R.S..an<l 



''' Mctivitvof .\ir and other Oases: (".eorge 



\'' ' ior» of the Horses living under Domes- 



"■■ ' Is. S.-Thc Alcoholic Ferment of Yeast- 



• niTr i-.,,r ) \ . - I h-- I ' rni-i.iation of Olucose. Manno-e, and Fructose 

 hy Sewi-juice; llr. A. Harden, F.R.S.. and \V. J. Young.— The 

 ElcctricMl Reactions of Certain Bacteria, and an Application in the , 



NO. 2060. VOL. 80] Q 1 



Detection of Tu 



Charles Russ.— 



of Bacteria ( K.ir 



ofHe.-tlthy K^.1.1 



Hermaphio<lili-i" in (.refidula f.<mK«la: I. H. Orton - 



Micro-bal.int. s. .in,l a New Method of Weighing Minute gi 



U. D. -Stscl • ■■ " 



Ii- Bacilli in Urine hy Means of an Electric Current : 



F.rTectof the Injection of the Intracellular Constituents 



il Endotoxins) on the Opsonising Action of the Serum 



Prof. K.T. Hewleti.— OntheOccurrrnceof I'rolandii,: 



—Sensitive 



uantities : 



■ Rays 



Mailer, ami on the 

 Velocity: W. Wilsoi 

 lalion and Ki^spiratit 

 for Using Increase 

 Assimilation in Ix:as-< 



r Grant. — The Polarisation uf Secondary y Kays ; 

 On the Absorption of HomoKeneoos p Kays by 

 Variation of the Absorption of the Rays wit), 

 — Kxperimental Researches on \'eBetable Assimi 

 I. V. — A Critical Examination of Sachs' Method 

 f I)iy Weight as a Measure of Carbon Dioxida 

 : D. Thoday.— And other Papers. 

 FRIDAY, JuNi-; 35. 1 



Phvsical Sociktv. at 5. — A Transition Point in Zinc Amalgam : Prof. 1 

 Carbart. — A .Method of Producing an Intense Cadmium Spectrum, with a 

 Proposal for Ills- Use of Mercury and Cadmium as Standards in 

 Refractomelry : Ur. T. M. Lowry.-On the Measurement of Wave- 

 length for High Frequency Electrical Oscillations: A. Campbell.— 

 An Electro-magnetii- Method of Studying the 'theory of and Solving 

 Algebraical Equations of any Degree : Dr. A. Russell and J. N. Ally — 

 The Sine Condition in Relation to the Coma of Optical Systems : S. D. 

 Chalmers.— Ejihibilion of a new Feiy Thermo-electric Calorimeter: 

 C. V. Drysd;.le — An Instrument for Measuring the Strensth of an 

 Intense HoH/onal Magnetic Field: F. W. Jord.in.-On a Method "f 

 Determining the Sensibility of a Balance: Prof. Poynting, F.R.S., 

 anil G. W. Todd.— The Balance as a Sensitive Barometer: G. W. 

 Todd. 



MONO A y, June a8. 



Roval Geographical Society, at 8.45 (In the Albert Hall).— 



Exploration in the South Polar Region : Lieut. E. H. Shackteton. 



TUESDAY, June 29. 



Royal Anthropological Institute, at 8.15. — The Social Organisation 



of the Andamanese : A. R. Brown. 



CONTENTS. PAGE 



Evolution : Old and New. By Prof. R. Meldola, 



F.R.S 481 



Prof. Fischer's Investigations on the Carbohydrates 



and on Ferments. By T 485 



The f ■,;/,//:;,; Expedition. By J. W. J 4S6 



The Geological Society of Glasgow. By G. W. T. 487 

 Our Book Shelf;— 



dc luiilehache : " Uniles Klectriques." — Dr. J. A. 



Marker 4S8 



Fabry : " Traite de MathematiquesgeniJraleS a I'usage 

 des Chimistes, Physiciens, Ingenieurs, et des Lleves 



des Faculies des Science." — J. P 4SS 



Diiflein : " Probleme der Protistenkunde. I. Die 

 Tiypanosomen ihre Bedeutunc fiir Zoologie, 

 Medizin und Kolonialwirlschaft." — R. T. H. . 4S9 

 Riley: ".American Philosophy: the Early Schools " 489 

 Mees : " The Photography of Coloured Objects " . . 489 

 Nelting : " The Nautic- Astronomical and Universal 



Calculator " 490 



Russell: "The Theory of Electric Cables and 



Networks." — J. P 490 



Letters to the Kditor : — 



On llie Relation of "Recoil" Phenomena to the 

 Final Radio-active Product of Radium. — Prof. 



J. C. McLennan 490 



Molecular Ellusion and Transpiration. — Martin 



Knudsen 491 



The Germ-layer Theory. — Ric. Assheton 492 



The I'dllinalion of the Primrose. — W. E. Hart . 492 

 Frost and Ice Crystals. (lUuslnU.d.) By G. F. H. S. 492 

 Water Power in the United States, {/lliislraled.) . 494 

 Scientific Research in the Sudan. (I/liislraUd.) By 



J. W. 'W. S 49S 



The Darwin Commemoration at Cambridge .... 496 



Notes 49S 



Our Astronomical Column : — 



Discuvcry ui a Comet, igCKiiJ 502 



Elemenis an.! Ephemeris for Winnecke's Comet, 1909 502 



The Rcceni Lunar Eclipse, June 3 502 



The Phcu.ili.-lionieter 503 



The Km 11^ of Position of Images photographed 



throiiijh (ilass 503 



A New Institute of Physiology at University 



College, London. ;/./'»,i.v, ;/,■,/.) ... . 503 



The Investigation of Gaseous Explosions. {IVith 



nhqninn. Ux Prof. E. G. Coker 505 



"Chemical l-;mbryos. lly A. D 507 



Spectroscopic Researches . . 508 



University and Educational Intelligence 508 



Societies and Academies 509 



Diary of Societies 510 







