February 2, 1922] 



NATURE 



159 



mentary conduction exhibited by metals during the 

 cathodic occlusion of hydrogen' is not of ordinary 

 metallic character.— J. a'. Harris and E. W.SInnott': 

 The vascular anatomy of normal and variant seedlings 

 of Phaseolus vulgaris. A comparative and biometric 

 study of the gross vascular anatomy of the seedlings. 

 — L. L. Woodruff : The present status of the long- 

 continued i>edigree culture of Paramecium aurelia at 

 Yale University. The culture has attained to about 

 8qoo generations during thirteen and a half vears of 

 life. Conjugation is not necessary, but there is a 

 periodic endomyxis. 



No. 2 (February, 1921).— A, J. Dempster: Positive- 

 ray analysis of magnesium. Isotopes of weights 24 

 25, and 26 combined in the ratio i : i : 6 are found.— 

 C. Barus : The energy content of the diapason.— 

 W. A. Setcliell, T. H. Goodspeed, and R. E. Clausen- 

 A preliminary note on the results of crossing certain 

 varieties of Nicntiana Tabacum. One general result 

 has b<Hm a demonstration of the difference from a 

 genetic point of view between any two of a number 

 of so-called fundamental varieties' of N. Tabacum — 

 J. Kendall : The correlation of compound formation 

 lonisation, and solubility in solutions : Outline of a 

 modified lonisation theory. It is assumed that ionisa- 

 tion IS preceded by combination between solvent and 

 solute, and is indeed a consequence of such combina- 

 tion -E. H. Hall: The Peltier effect. Application 

 of the author's recently proposed theories of electrical 

 conduction on metals to the discussion of the Peltier 

 eflfect.— J. H. McDonald : The roots of 

 functions. 



Bessel's 



Official Publications Received. 



Bulletin of the A 

 Art. 20: The 

 Asiatic Zooloe-ica 



frrlt'^^ri'h?.^'"'""" '^r ^''*"™' Tlistory. Vol. 44. 

 l^] ^ the Amerionn Museum of Natural History's 



Pp. 575-6,2. (N^w Y^^;r Citv" "' ''''-''''■ «^ ""^^^ B«"^- 



Pp''1r'(Vtir;t'o„''"^"^*.V «^"---*-n -^^ -^rembers. 1921-1922. 



Conseil Permanent Internat 

 Bnpnorts et Proefes-Verbanx d. 



lal pour I'Kxnloration tie la 5fer 

 Keunions — ■ — - 



Part IT. Tr.=„ V"t" •; * ° Expedition, 1913-18. Vol. 3: In- 

 r L w tI ^''^''„«n «•<- Western Arctic Coast of 

 r«n»?' n P- /"''«''s<'n- PP- 62. (Ottawa.) °' 



Canada. Department of Mines: Jfines Branch The Production 

 -3?"!oVtf J;"'" '" ''"""''" ^'"""^ '''' Calendar Telrl9?0."'pp.'i" 



sects. Part K : Insect T/ 



of 

 +.36. 



rL ";,-r„ Aul.^rj'-.-J't^L J '^","«« .Bul!_etin No. 121: Notes on 



Contae-ious Abortion in Ponv 

 and T. M. Dovle, Pp 

 Printing- Office.) 



nd Donkey Mares. By R. Branford 

 .> annas (Calcutta : Government 



Scientific Beports of the A oricultural Research Institute Pusa 

 Onclud.n^ the Reports of the Imperial Dairy Expert and the 

 .Secretary. Sug-ar Bureau). 1920-21. Pp iv+90-4-10 nlates ^r«i 

 cutta: Government Printing Office.) Rupees 18 ^ * 



Communications from the Physical LaboratorVof the University 

 of Leiden. Supplement No. 44 to Nos. l.-.'-lfiS.' Pp. 74 (I'eklen ) 



Department of .^i^riculture, Ceylon. Bulletin No. 48: Summarv 

 of i.aws and Reg-ulations in Force in Cevlon in Respect of Plant 

 Pests and Di.sea.ses. Pp. fi. .",0 eenls. Bulletin No 49 • The Culti- 

 vation of Limes. By O. G. Auchinleek. Pp. lS+2 plates .r,o cents 

 Bulletin No. .50. The Cultivation of Pineapples in Ceylon By F \ 

 Stockdale Pp. 12+4 plates. 50 cents. (Peradeniya : Department 

 of Ag-riculture.) ' 



Ceylon Administration liei.nrts for 1020. IV. : Education. Science. 

 and .Vrt. Department i,f A L-rifiiltun' : 1!( 

 Agrriculture for 1920. l'|) :fs. ( T, l■;l(l..|liv 

 culture.) 



Memoirs of the Department i.f A.m-ki 

 Series, Vol. 6, No. 2. SepteinlM i . |v :i, 

 •2i. 9fi. (Calcutta: Thacker, Snink ;iu<\ 

 .■uid Co.) 



NO. 2727, VOL. 109] 



^ of the Director of 

 n : Department of .\pri- 



ture in India. Chemical 



Nos. 4 and 5, October. 



1. ; London : W. Thacker 



Diary of Societies. 



THURSDAY, Februari 2. 



RoTAL I.vsTlTiTio.v Or Gheat BRITAIN, at 3.— Sir Napier Shaw • 

 Droughts and Floods (1). 



RoTAL SociKTT, at 4.30.-C. Shearer: The Oxidation Processes of 

 the hohinoderm Egg during Fertilisation.— J. Schmidt • The 

 Breeding Places of the Eel.— J. Gray : The Mechanism of Ciliary 

 Movement.— J. Gray : The .Mechanism of Ciliary Movement. Parts 

 1 and 2.— J. S Huxley and L. T. Hogben : Experiments on Am- 

 phibian Metamorphosis and Pigment Responses in Relation to 

 Internal Secretions. 



LiVNEAN Society of London, at 5.— F. Johanssen : The Canadian 

 A.rctic Expedition.— Dr. J. C. Willis and U. Yule: Some Statis- 

 tics of Evolution and Distribution in Plants and Animals, and 

 their Significance— Mrs. E. M. Reid : Note on Fossil Floras 



Royal Society of Medicine (Medicine Section), at 5.— Sir William 

 Hale-White, Sir William Willcox, Sir Berkeley Moynihan, and 

 Mr. Sherren : Discussion : The Treatment of Gastric Ulcer. 



Institittion of Et-kctbical Engineers, at 6.— L. J Romero and 

 J. B. Palmer : The Interconnection of A.C. Power Stations. 



Chemicai, Society, at 8.— E. J. Hartung : The Action of Li-rht on 

 Silver Bromide.— C. K. Ina-old : The Structure of the Benzine 

 Nucleus. Part I. Intra-nuclear Tautomerism.— C. K. Ineold • 

 The Structure of the Benzine Nucleus. Part II. Synthetic 

 Formation of the Bridged Modification of the Nucleus.— C. K. 

 Ingold and H. \. T>iggott : The Structure of the Benzine 

 Nucleus. Part III. The Suppression of Intra-nuclear Change. 

 FRIDAY, Febbiary 3. 



Institite of Cost and Works .Accountants (at Holborn Restaurant), 

 at 2.30.— Costing Conference on the Necessity for Scientific 

 Costing. 



Royal Society of Medicine (Laryngology Section), at 4.45. 



Royal College of Si-hgeons of England, at 5. — Prof. K. M. 

 Walker: The Nature and Cause of Old Age Enlargement of 

 the Prostate (Hunterian Lecture). 



Institition of Mechanical Engineers, at 6. — H. S. Denny and 

 N. V. S. Knibbs : Some Observations on a Producer-gas Power 

 Plant. 



EiGENics Enrc.^TioN Society (at Royal Society), at 8.— Prof. H. J. 

 Fleure : Some Social Bearings of Race Study. 



Jvnior Institution of Engineers, at 8. — Mai'oi W. Gregson : 

 Utilisation of Waste Heat from Internal Combustion Engines. 



Royal Society of Medicine (Anesthetics Section), at 8.30.— Dr. 

 A. L. Flemming and others : Discussion : The Uses and Limita- 

 tions of N2O and Oo Annesthesia. 



Royal Institution of" Great Britain, at 9.— Sir Francis Young- 

 husband : The Mount Everest Expedition. 

 itfO.Vfl.ir, Febriahy 6. 



Victoria Institute (at 1 Central Buildings, Westminster, S.W.I), 

 at 4.30.— Dr. A. T. Schofleld : Some Difficulties of Evolution. 



Royal College of Si hgeons of England, at .5,— Prof, A, H. Todd: 

 Orthopaedic Aspects of Rheum.atoici .\rthrltis (Hunterian Lecture). 



Royal Institution of Great Britain, at 5.— General :Meeting. 



Society of Engineers, Inc. (at Geological Society), at 5.30. — T. J. 

 Gueritte : Presidential Address. 



Institution of Electrical Engineers (Informal fleeting), at 7. — 

 .1. Joseph and others : Discussion : Some Practical Applications 

 of the Thermionic Valve. 



Aristotelian Society (at University of London Club. 21 Gower 

 Street, W.C.I), at 8.—X. H. Hannav : Standards and Principles 

 m Art. 



Royal Sociitt or Akts, at 8.— C. Ainsworth Mitchell: Inks (Cantor 

 Leoturo- i:fi. 



Society m ( himkai. Industry (London Section) (at Chemical 

 Society), :it S, 



Surveyors' Institution, at 8. — .Adjourned Discussion on paper by 

 W. B. Davidge : The Problems of Greater London. 



Royal Institute of British Architects, at 8.30.— President's Ad- 

 dress to Students. 



Royal Geographical Society (at .Bolian Hall), at 8.30.— Brig. -Gen. 

 G. K. Cockerill : Byways in Hunza and Chitral. 

 TUESDAY, February 7. 



Royal Institution of Great Britain, at 3— Prof. H. H. Turner: 

 Variable Stars (2), Long Period Variables. 



Royal Society of .\^rts (Dominions and Colonies Section), at 4.30. — 

 W. Turnbull : The Timbers of British Columbia. 



Zoological Society of London, at :>:.W. I'Ih' Sccrt'tary : Hijinrt 

 on the Additions made to the .'^ocirty^ Mcn.iL-.'ri'' iluriiiL'- tlii> 

 months of November and Decemljcr, l!l:21, .\, II, l'.vaii>: Soinr 

 Deductions from a Set of Cuckoo's Kg.trs taiveii near Camhritlge, 

 and now Exhibited.— Lord Clifford of Chudleigh : y nUitherium 

 mitcheUi. — Miss L. E. Cheesman : (1) Sense-organs of the Fresh- 

 water Crab, Cardisnma armatum. (2) Position and Function of 

 the Siphon in the Amphibious :\Iollu.sc. Awitnllnini rcrmiformis. 

 — C. W. Hobley : The Fauna of Knst Africa and its Future.— Dr. 

 J. Stephenson: Contribution to the .M()rpliolo,iry, Classification, 

 and Zoogeography of Indian 01igoelia>ta.— IV. the Diffuse Pro- 

 duction of Sexual Cells in a Speines of ClKietngiinter (Fam. 

 Naididae). V. Drauida japnnica (Jlichlsn.), a Contribution to 

 the Anatomy of the Jfoniligastridee. VI. The Relationships of 

 the Genera of Moniligastridse ; with Some Coiisidiratioii.s on tin- 

 Origin of Terrestrial 01igochR>ta. 



Institution of Civil Engineers, at 6.— Dr. H. 1". rai-lKill : Hydro- 

 electric Installations of the Barcelona ri:i( tioii. Lifrlit. and 

 Power Company. 



Royal Photographic Society of Great Bhitain. nt 7.— O, ,T. Wilkin- 

 son : The Application of Flashlight Photography to the Study 

 of Natural History Subjects. 



