February io, 192 i] 



NATURE 



779 



logues of ethylene sulphide, i : 2-thiopropane and 

 I : 2-thiobutane. These two sulphides have been pre- 

 pared in a pure state, and their principal physical 

 constants are given and compared with the isomers 

 described bv Grichk^vitch-Trokhimovsky. — R. Fo»«e : 

 The svnthesis of cyanic acid by the oxidation of forni- 

 amidc and of oxamic acid. Formamide was oxidised 

 by potassium permanganate in strongly ammoniacal 

 solution and the resulting; solution heated with am- 

 monium chloride; urea was proved to be present by 

 the xanthydrol reaction.— C. Dulr«l««e : The auto- 

 oxidation of a-bromostyrolene.— O. Menfjel : The inter- 

 Glacial and post-Glacial tectonic movements of the 

 eastern end of the Pyrenees. — C. Dufoor : The values 

 of the magnetic elements at the Val-Joycux Observa- 

 tory on January i,. 102 1. — .Ad. Dawv de Vlrville : 

 Modification of the form and structure of a moss 

 (Hypnum commutatunt) kept under water. After six 

 months marked changes in the mode of growth were 

 observed. — E. Mlifle : The action of rhloropicrin on 

 the germinative faculty of .seeds. The destruction of 

 parasitic insects on seeds with chloropicrin vapour is 

 readily carried out, but in some cases the .seeds are 

 injuriously affected. Leguminous seeds are not injured 

 by this treatment. — P. Mai* : The chemical mechanism 

 oif the assimilation of carbon dioxide by green plants. 

 — A. Vtzari : The latent period in experiments of 

 testicular transplantation and the law of " all or 

 nothing."— M. Marajje ; The limits of audition.— C. 

 Parcher and I.. Panl«»et : Exporimenfal researches on 

 colostrum. Colostrum Is not a special fluid secreted 

 by the mammnrv glaml, but the product of phago- 

 cvtosis of ordinar\' milk; it is a product of retention. 

 The lactose is .nbsorbed, and the DhasJorvtes att.nck 

 the colloids and fat globules. — E. Kayter : The 

 influence of lifht rndi.Tfions on the azotobacter. — H. 

 Vallfc and ff. Carrt : The adsorption of the aphthous 



Books Received. 



The Dcvelopmint of Institutions under Irrigation. 

 Bv Prof. G. Thomas. Pp. xi-H293. (New York : 

 The Macmillan Co.; London: Macmillan and Co., 

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Laboratory Projects in Physics : A Manual of 

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 Pp. xiii + 267. (New York: The Macmillan Co.; 

 London: Macmillan and Co., Ltd.) <)s. net. 



The Origin and Development of the Nervous 

 .System from a Physiological Viewpoint. By Prof. 

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 of Chicago Press ; London : Cambridge University 

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An Introduction to Zoology for Medical Students : 

 By Prof. C. H. O'Donoghue. Pp. x + 501. (London : 

 Ci. Bell and .Sons, Ltd.) i6v. net. 



.Mechanism, Life, and Personality : An Examina- 

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• • Dr. J. .S. H.Tldane. Second edition. Pp. vii+iS2. 

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New .Studies of a Great Inheritance : Being Lec- 

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 I'.v Prof. R. S. Conway. Pp. viii + 241. (London : 

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First Course in General Science. By Prof. F. D. 

 I', irber and others. Pp. vii+607. (New York : H. 

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Elementarv Vector .Analysis : W'ith .Applirnlipn to 



• '■omefrv and Phvsirs. By Dr. C. E. Weatherburn. 

 I'p. xxvii+iS4. (London: G. Bell and Sons, Ltd.) 

 17?. net. 



NO. 2676, VOL. 106] 



Anuario del Observatorio de Madrid para 192 1. 

 Pp. 591. (Madrid.) 



Botany with .Agricultural Applications. By Prof. 

 J. N. Martin. Second edition, revised. Pp. xii+604. 

 (New York: J. Wiley and Sons, Inc.; London: 

 Chapman and Hall, Ltd.) 2i:>. net. 



.A Laboratory Manual of Organic Chemistry for 

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 net. 



Geography for Junior Classes. By E. Marsden and 

 T. .Alford Smith. Pp. viii-t-278. (London: Macmillan 

 and Co., Ltd.) 5s. 



Purpose and Transcendentalism. An Exposition of 

 Swedenborg's Philosophical Doctrines in Relation to 

 Modern Thought. By H. S. Redgrove. Pp. xvi-t-170. 

 (London: Kcgan Paul and Co., Ltd.; New A'ork : 

 E. P. Dutton and Co.) 5i'. net. 



The Carnegie Trust for the Universities of Scot- 

 land. Nineteenth .Annual Report (for the Year 1919- 

 20) Submitted by the Executive Committee to the 

 Trustees on February 9, 1921. Pp. iv+102. (Edin- 

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Orographical, Regional, and Economic .Atlas. 

 Edited by T. Franklin. Part 3 : .Asia. Pp. 32. 

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Memoirs of the Geological Survey. Special Reports 

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 G. W. Lamplugh and others. Pp. iv-l-240+viii plates. 

 I2X. 6d. net. Vol. xiv. : Refractory Materials : Fire- 

 clays. Resources and Geologv. Pp. iv+243-(-iv plates. 

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Diary of Societies. 



THURSDAY. FMEUUii 10. 



VLoxkh Ii»»TiT«iiO!f or UncAT BH1T41.N, Bt 3.— Vrof. W. A. Herdmui: 

 Oceanogrmpta; (Probleim of the PUnkton). 



BoTAL 80CICTI, St *.3«.— lloT. John Uotcoe : Certain Kthnologiol 

 fekturea of tJganda. , , » 



Loicoo.i .MATH«>iAtic»L SociiTt (»t Roy»l A«tronomic«I Sooletj), at 

 6.— Prof. A. 8. Eddington : World Geometry (with particular 

 refercnoK to Weyl's Klcctromagnetic Thcor.v).— J. Brill ; Note on 

 the Elcctrnmasrnitio Kquation«.— J. E. I.ittlcwood : llescarohea in 

 the riiforv of thi- Kicuiann Zetafunction.— 8 Pollard : A New 

 Condition "for Cauohy's Theorem.— I. J. Schwatt : (1) An Inde- 

 pendent Korm of the Number! of Bernoulli ; (2) Euler • 

 Nambom of Hiirher Order; (3) Certain Numberi whieh are 

 related to Kuler^n Numbert of Higher Order.— 8. Tunoiohenko : 

 (1) The Tension of a Prism one of the CroMieotion* of whiob 

 remains Plane; (2) The Analogy with Membranea in the Cue 

 of the Bending of a Prlem. 



CaiiB-STtni Socirrr (at Rot«1 Sanitary In«titnte). at «.— Dr. 

 O. H. Mllen: Torational Tentii. 



ImTiTVTion or Kitcrnicii. KNomncia (at Inatitntlon of Cl»11 

 Engineers), at 0.— l>i«eu»iiion on Electrio Appliances for Domeitlo 

 I'nrposrs. to be introdtioed by Dr. E. Orifllths and V. H. Sehoflelo 

 in a Paper on Some Thermal Characteristics of Electric Orenl 

 and Hot IMntes. 



Lo.inojc DinuATOtxioicAl SooiRT, at (I.— Dr. Sibley ; Alopeota 

 (Chesferflcld l.eetur»>. 



OmcAL Socirrr, at 7.30. 



UOTAL Socirrr or MtoiriKH (Neurology Section) (at National Hoi- 

 pftal for Faralyiia and Epilepsy), at 8. 



rniDAT, rnBSABT n. 



ROTAL AimioKOMiCAi. SociiTT (AnnlTersary Meeting), at 5. 



RoTAt BociiTT or Mtnici!»» (Clinical Medicine. Surgery), Joint 



Meeting, at 5.— Dr. H. Maekeniie, J. Berry, and (Hhere : Di» 



enssion : The Medical and Surgical Treatment of Ora»e«' Disease. 

 RoTAi. Cotiror or Si:«o«o»ii or Exounn, at 8.— Prof. A. O. T. 



Fisher: Tx>«>se Bodies in Joints. 

 ParairAi, ^ociKTT or I.oipox (at Imperial College of Scii-nce), at 



5. — Diaonaalon on Absolute Measurement* of Elertricsl Kesist. 



anoe. and Instruments Based on the T^pU'-rniiiri \r.ruiHi.ii <if 



Beaistanoe.— Sir Ilichard OlasebriKik and ' 



Meaaurement* of Kleetrical Resistance. -It 



Prof. H. I,. Callendar : The Compensate.! r I 



Inatmment for the Meararement of Radiation.— C. 11. Durling : 



The Karlv Work of Slemena on the Resistance Pyrometer.— 



