270 



NATURE 



[Apkil 20, I'H I 



Royal Irish Academy, April 10.- Rcr. J. P. Mahaffy, ( PHvstrA!, Sorirrv. m 5, 



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■HijthtenUon Flterjlrotlatk WkttiiMUn 

 Affectfd by Tempei 

 - on the Behavi 



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i'roportion* of Air mmI 



Commercial and T«cfai>ica) 

 Frame Thomtoo. 



trar. 



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 11 iIk- ((luniiy li\ i1k- aiilluM" an- j^ivdi and 



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Royal Society of Sciences.— The Na,Jni. hlui (physico- 

 in.ilhi-iii.-iiical s.riiuni. pari i. for Km. (nni.ains the 

 fdlliiwiii:; UK'iiKiii- ((■iiiiinmi( riled In llv vi,ri.-i\ : 



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 of till' i.irihV rru-t in (icrm.-m \'.:\^\ Aliira. 



J.iiuiaiv i^. mil. \\". VoiRt : Cuiil rihulion^ to Lord 

 l\i\!.i'liV llKi,r\ nf !;ralin^-iiinc\i(in. 



I". iMiiL X. Galli .-ind 1\. Fdrsterlingr : 

 i -I .ind i\pii iiiK iilal r. si-,ir( iii-^ on iIk- optical 



1" ii,.\ ii'iii 111 niiiiiinal iiii iallic t'llni-.. 



\(i\-i'nil)i ]• j(i, ii)i(), ainl janu,ir\ j.s, imii.- W. Voigti 

 ^''^ 'li ■■' 'loll' l)y 11. A. Lorontz : (linrr.-il considerations on 

 eii;:"ien .iiul ali^m-pl inn in c.uineclii)n with the question of 

 DK a-iuinienl.., of inlen>iiv in tlie Zecinan effect. 



DIARY OF SOCIETIES. 



THURSDAY, April 20. 



Society of Dyers and Colol-rists, at 8.— The Dyein? of Paper Pulp : 

 R. Bicker.-tafTc. 



MONDAY, April 24. 



Illuminatinc. lONcaxKURiNG SOCIETY, at 8.— The Ratio of Light to 

 Illumination: Havdn T. H.irrison.— Some Notes on the Effect of Wall- 

 papers upon the Illumination of Interiors : P. J. Waldram. 



V'CTORIA Institute, at 4.30.— The Sidereal Universe : Sir David Gill, 



TUESDAY, AiRiL 25. 



■Royal Anthropoi.ogicai, Institutk, at S.i=;.— River Life and People 



in Upper India: P. B. Bramlcy. 

 J^ovAL Statistical Society, at 5.— The Application of the Method of 



,. i"'^' ^°"^'^''°" '° '^<= Estimation of Post-censal Populations: 



E. C. Snow. 



WEDNESDAY, April 26. 



Royal Society of Arts, at 8.— The Production and Identification of 



Imitation and Artificial Gems : Noel Heaton. 

 Geological Society, at 8.— The Llandovery and Associated Rocks of 



North-eastern Montgomeryshire : A. Wade.— Geology of Northern 



Nigeria: Dr. J. D. Falconer. 

 British Astronomical Association, at 5. 



THURSDAY, April 27. 

 Royal Society of Arts, at 4.30.— The Trend of Mineral Development 



m India : Sir Thomas Henry Holland, K.C.I. E., K.R.S. 

 Royal Institution, at 3.— The Optical Properties of Metallic Vapours : 



Prof. R. W. Wood. 



AIathematical Society, at 5.30.— On the Geometry of a Deformable 

 Octahedron: G. T. Bennett. — A .Symmetrical Method of Apolarly 

 Generating Cubic Curves: W. P. Milne.— The Solution of the Homo- 

 Seneous Linear Difference Equation of the Second Order (Second Paper) : 

 G. N. Watson.— A Cartesian Theory of Complex Geometrical Elemenis 

 of Space : G. B. Mathews.— The Number of Primes of given Linear 

 torm : Lieut.-Col. A. Cunningham.— On the Proofs of the Properties of 

 Kiemann s Surfaces discovered by Luroth and Clebsch : Prof. M. J. M. 



Institution of Electrical Engineers, at B.-Battery Economics and 

 Batiery Discharge Arrangements : A. M. Taylor. 



FRIDAY, April 28. 



^'^vv\ JfSTiTiTTiON. at 9 —The Revolutions of Civilisaion : Prof W. M 

 Hinders Petne, F.R.S. 



CONTENTS. pa';e 



Engineering Articles in the Encyclopaedia 



Britannica. By W. H. W 237 



Experimental Zoology. liy L. D 238 



Reference Books of Biochemistry. ]!y Prof. Ben- 

 jamin Moore 239 



Metabolism of Plants. By J. R. G. . . . 240 



Agricultural Essays i 



Microscopy for Zoologists and Anatomists 



A. N. D 241 



Darwinism and Philosophy. By J. A. T 242 



Geology and the Doctrine of Descent - ;z 



Our Book Shelf ;| 



Letters to the Editor: — 



Further K-vperiments with the Gramophone. (A./ • 



/ra/^rfl'.)— Prof. John G. McKendrick, F.R.S. . 244 

 A New Variety of Zebra. {^Illustrated.) — Dr. 



William Ridgeway 245 



Implements of Moustierian Type from the Rock of 



Gibraltar.— Dr. W. L. H. Duckworth 245 



Damage done to Skulls and Bones by Termites. — 



Douglas E. Derry 245 



What is the genotype of X . . us Jones, 1900, biseJ 

 upon a Species erroneously determined as albus 



Smith, 1890?— C. W. Stiles 246 



A Kinetic Theory of Gr.ivitation. — Dr. C. V. Burton 246 

 Development of British Forestry. {Illus! .. . . z\^ 

 The Troglodytes of Europe. {Illustrated) ... j;S 



Major George Lamb, LM.S. By J. H. A .-9 



Notes J 49 



Our Astronomical Column: — 



April Meteors 254 



The Spectrum of Nova Lacerl.v 254 



The Different Quality of the Light Reflected from 



Various Parts of the Lunar Surface 254 



The Pyrheliometric Scale 254 



Double-star Observations 255 



Micromelrical Measurements of NebuL-e 255 



The Motion of Certain Stars in Space 255 



The Composition of the Gases caused by Blast- 

 ing in Mines 552 



Drainage and Malaria. By Col. W. G. King . . . 25? 



Some Papers on Invertebrates. By R. L 256 



Papers on Systematic Botany 257 



Reports on Glaciology 257 



The Association of Economic Biologists .... 258 

 The Conservation of our National Water Re- 

 sources. By M. F 258 



The Composition of Pine Wood. i;y T. M. L. . 259 

 Recent Advances in Turbines. {Illustrated.) By 



the Hon. C. A. Parsons, F.R.S 259 



Australasian Association for the Advancement of 



Science 263 



University and Educational Intelligence 267 



Societies and Academies 269 



Diary of Societies 270 



NO. 2164, VOL. 86] 



