34 



NATURE 



[November 2, 191 



CenliMi ( iiiniiiiii' • itii ill'- >ui\'\ .iiiil Mii(i\ ' 



VrL<rl,;i:,.li, \'.\>'\ liV A. ti. ImM-I.X. I'p. 



/' 'v l'r.->s.} i.v. II. 1. 



>.|nL;\. H\ I . II. IhuI-iiiI. Pp. \ lii f 

 159. (LiHiiloii : .M.h iiiiil.iii and (d., I.id.i i-,. i,/. 



Macrnillan's Krlunn Aritlimctic. Us I'. \\ ili^in- in .jihI 

 F. W. Coolv. J{o.,k \'l. IV- l'4- (I.chi.Iom: MaMiiillaii 

 and Co., I. Id.) .)(/. 



t..(.|(.-i. dn Has^in d.^ i'aii-.. |',\ M. P. {..-rndini. I'|i- 

 vi f .)'i,S. (Paris: A. Jlciinann \: l''ils.) J5 fiaiK -. 



Third Isi|)(irl on tli.- i;\|).riiniiilal Work <il lln- ^uf^ar 

 !'".\|)i ! iimnl Slalion lur lli'- ^■| ars moS, iQoy, and lyio, 

 Janiaiia. Py 11. II. ( Unsiiis. P|). 135. (Kinfjston, 

 Jamaica : Hope.) 



Nouvelles Tables Tri{*onom(5triques I-Ondanu ntales 

 (f.of^arithmp-s). Hy Vvo\. H. Andoyer. Pp. .xxxii + Coj. 

 (Pai i> : A. Ilcrniann \: l'"ils.) 30 francs. 



I h<- Natural llisiorv and Am ic|iiities of Selborne in the 

 County of Southampinn. P\ (.ilbcrt White. With illus- 

 trations in colour l>\ ti. V.. Collins. Pp. x-l-476. 

 (London : Macmillan and Co., Ltd.) 10s. 6d. net. 



Die Wirbeltiere. By Prof. O. Jaekel. Pp. viii + 252. 

 (Berlin : Gebriidcr Borntraeger.) 10.60 marks. ^ 



Petits Contes Populaires. Adapted and edited with 

 exercises by F. B. Kirkman. Pp. 52. (London : A. and 

 C. Black.) M. 



Worterbuch der 1 ' ilogie. By Dr. H. Schmidt. Pp. 

 viii+581. (Leipzig : . Kroner.) 10 marks. 



L'Assaut du Pol' Sud. By I'Abb^ Th. Moreux. Pp. 

 221 (Paris: Jouv & Cie.) 1.50 francs. 



Life in the Sea. By J. Johnstone. Pp- vii+150. 

 (Cambridge University Press.) \s. net. 



New Zealand. By the Hon. Sir R. Stout and J. L. 

 Stout. Pp. viii-f-185. (Cambridge University Press.) 

 \s. net. 



Steam Turbine Design, with Special Reference to the 

 Reaction Type, including Chapters on Condensers and Pro- 

 peller Design. By Dr. J. Morrow. Pp. viii-l-471. 

 (London : Edward Arnold.) i6s. net. 



The Adventures of Jack Rabbit. By R. Kearton. Pp. 

 xii-f248. (London : Cassell and Co., Ltd.) bs. 



The Story of the Five Elements. By E. W. Edmunds 

 and J. B. Hoblyn. Pp. viii + 264. (London : Cassell and 

 Co., Ltd.) 25. 6d. net. 



Ostwald's Klassiker der Exakten Wissenschaften, No. 

 179. Abhandlungen uber Dialyse (Kolloide). By Th. 

 Graham. Herausgegeben von E. Jordis. Pp. 179. 

 (Leipzig : Engelmann.) 3 marks. 



DIARY OF SOCIETIES. 



THURSDAY, November 2. 



RovAL SociBTY, at 4.30.— Colour Blindness and the Trichromatic Theory 

 of Colour Vision. Part III. Incomplete Colour Blindness : Sir W. de W. 

 Abney, K.C.B., F.R.S.— Note on the Iridescent Colours of Birds and 

 Insects: A. Mailock, F.R.S.— The Behaviour of the Infusorian Micro- 

 nucleus in Regeneration : K. R. Lewin.— An Inquiry into the Influence 

 of the Constituents of a Bacterial Emulsion on the Opsonic Index : 

 A. F. Hayden and W. P. Morgan. — The Morphology of Trypanosoma 

 gambicnse (Dutton and Todd): Colonel Sir David Bruce, C.B., F.R.S. 

 — {i) Factt)rs in the Interpretation of the Inhibitive and Fixation Serum 

 Reactions in Pulmonary Tuberculosis ; (2) Preliminary Report upon the 

 Injection of Rabbits with Protein-free (Tuberculo-) Antigen and Antigen- 

 Serum Mixtures : A. H. Caulfeild. 



MONDAY, November 6. 



Society of Engineers, at 7.30.— Two-cycle Engines : R. W. A. Brewer. 



RovAi, Geographical Society, at 8.30.— The Norsemen in America : Dr. 

 Fridtjof Nansen, G.C.M.C. 



Society of Chemical Industry, at 8.— Deflocculation as Aflfecting 

 Lubrication : Dr. E. G. Acheson. 



TUESDAY, November 7. 



Institution of Civil Engineers, at 8.— President's Address. 



RaNTGEN Society, at 8.15.— Presidential Address: Alan A. Campbell 

 Swinton. 



Zoological Society, at 8. ^o.— Lantern Exhibition on the Moulting of the 

 Arctic Fox : R. I. Pocock, F.R.S —On the Moulting of the King's 

 Penguin (Aptenodytes pennanii) in the Society's Gardens : D. Seth-Smith. 

 —On the Presence of Two Ovaries in Certain British Birds, more 

 especially the Falconidac : T. E. Gunn.— Ontogenetical Transformations 

 of the Bill in Ardea cinerea : Prof. P. P. Sushkin.— On some CoUembola 

 from India, Burma, and Ceylon, with a Catalogue of the Oriental Species 

 of the Order : Dr. A. D. Imms. 



JVEDNESDAY, November 8. 



Faraday Society, at 8.— Address by Dr. E. G. Acheson. 



Geological Society, at 8.— On the Interglacial Gravel-Beds of the Isle 

 of Wight and the South of England, and the Conditions of their Forma- 

 tion : Prof. E. Hull, F.R.S. ; The Gopeng Beds of Kinta, Federated 

 Malay States : J. B. Scrivenor. 



NO. 2192, VOL. 88] 



Institution or Elkctrical En'. 

 Power Transforiii<-r in I'licMi'-v.! 

 Unit System : \. 



The Conckki I . — Precidentia! A 



Tanner, C. B. 



Royal Society, at ^.ya.— i' >-,.■! aite Paptrt — The Spectrjin 

 W. Crook es, O.M , Kor. Sec. K.S.— A Chemically-active .M 

 Nitrogen pro<luce(l by the Electric Discharge. II. : Hon. 1 

 F.R.S.— Production of Solid Oxygen by the Evaporation ol the 1 

 Prof. Sir J. Dcwar, F.R.S. — On the Gaseous Condensable Coi! 

 Explosive at I>}w Tcmperalures, prodticed from Carbon Di- 

 Vapour by the Action of the Silent Electric Discharge. II. : Prof 

 Dewar, F.R.S., and Dr. H. O. Jones.— fi) Optical Ditper&ion ; .'•. 

 parison of the Maxima of Absorption and Selective Reflection for 

 Substances; (2) The Influence of the Solvent on the Position of \ -"ii 

 tion Bands in Solutions : Dr. T. H. Havelock — .An Experimental li.- i; 

 gation of Gibbs's Th'-riT-"ivnr.ri,i. al Theoryiof Inlerfacial Concentrate m \. 

 the Case of an Aii-» e : Prof. F. G. Donnan, F.R.S , am 



J. T. Barker. 



London Mathematics.. .- — . . v, at 5^0. — Annual General Meeting.- 

 The Invariants of the Linear Partial Diflferential Equation of the Sccoa 

 Order in Two Independent Variables : J. E. Campl>ell.— On Invariaij(<>c 

 a Canonical Substitution : H. Hilton. — The System of Lines of a 

 Surface : C. T. Bennett. — The Relations between Borel's and 

 Methods of Summation : G. H. Hardy and J. E. Littlewood. — A 

 of Establishing the 27-line Configuration of a Cubic Surface : W. P. Ml 

 Mathematical Analogues of Mental Phenomena: H. Bateman. 

 FRIDAY, November 10. 



Royal Astronomical Society, at 5. 



Physical Society (at Finsbury Technical College) at 5. — Reflectioj 

 Polariscopes for the Study of Optical Stress in Materials : Prof. Silvanus F 

 '1 hompson and Prof. E. G. Coker ; '1 he Effects of Holes and SemicircuU 

 Notcbesinthe Distribution of Stress in Tension Members (demonstrate 

 by polarised light): Prof. E. G. Coker. — (i) A Surface-tension Phenc 

 menon ; (2) Temperature Rise in Drops as they Part ; (3) Temperature 

 of Equidensity of Liquids : Mr. C. R. Darling. — (i) Exhibition of a I>ar|f 

 Harmonograph ; (2) Physiolc«icai Effect of an Alternating Magnctj 

 Field ; (^) Demonstrations of Acoustical Experiments. New and Old 

 Prof. S. P. Thompson. 



CONTENTS. 



PAG] 



Aristotle as Biologist. By F. A. D, 



South African Orchids. By A. B. R 



The Study of Field Crops. By Dr. E. J. Russell . . 



Properties of Matter 



Marine Engines. By W, H. W 



Our Book Shelf 



Letters to the Editor:— 



Irregular Long-period Changes in Level. ( With Dia- 



^vzw.)— Prof. John Milne, F.R.S 1 



Solar Eclipse— April, 1912. — C. E. Stromeyer . . 1 

 Khartoum for an Observatory. — Dr. Q. W. Grabham 1 

 The Scientific Misappropriation of Popular Terms. — 



Prof. J. W. Gregory, F.R.S 



The Colour of a Donkey.— E. C. Spicer 



Non-Euclidean Geometry. — Harold M. Sadow- 



Pittard ; Dr. D. M. Y. Sommerville 



Dew-ponds and the Dry Season. — J. P. Clatworthy 



Charles Darwin's Earliest Doubts Concerning the 



Immutability of Species. By Prof. John W. Judd. 



C.B., F.R.S 



Anthropological Research in Northern Australia 

 The Taal Volcano. {.Illustrated.) By Prof. John 



Milne, F.R.S i 



The Solar Physics Observatory i 



Notes 1 



Our Astronomical Column : — 



Astronomical Occurrences for November 



Observations of Comets. (Illustrated.) 



Changes on Mars 2- 



Colour Photographs of Saturn 21 



Aurorae in Middle Latitudes 2' 



The Minor Planet 191 1 M.T 2' 



Geological Work in the United States. (Illustrated.) 



G. A. J. C. . . 2 



By 



Stereoscopic Vision and Instruments 2 



The Technical College, Bradford 2 



Zoology at the British Association. By Dr. J. H. 



Ashworth 2 



Old and New Views on the Treatment of Con- 

 sumption. By Dr. C. Theodore Williams .... 2 

 University Education in England and Wales ... 2 



University and Educational Intelligence 3' 



Societies and Academies 3 



Books Received 3 



Diary of Societies 3 



