7i8 



NATURE 



[February 27, 1913 



1912. Sitzungsberichte und 

 (Vienna : K. K. Hof und 



28 Mai bis i Juni, 

 Vortrage. Pp. v+i"; 

 Staatsdruckerie.) 



Transport de Force : Calculs Techniques et Eco- 

 nomiques des Lignes de Transport et de Distribution 

 d'Energie Electrique. By C. Le Roy. Deux. Partie. 

 I^p. 143. (Paris : A. Hermann et Fi!s.) 6 francs. 



Aborigines of South America. By the late Col. 

 G. E. Church. Edited by Sir C. R." Markham. Pp. 

 xxiv + 314. ( London : Chapman and Hall, Ltd.) 

 10.?. 6rf. net. 



Calendario della Basilica Pontificia del Santissimo 

 Rosario in Valle di Pompei per I'Anno 1913. (Valle 

 di Pompei : Scuola Tipografica Pontificia.) 



Canada. Department of Mines. Mines Branch. 

 Report of the Building and Ornamental Stones of 

 Canada. Vol. i. By \V. A. Parks. Pp. xiii + 376 + 

 vi + lxxvii plates. (Ottawa: Government Printing 

 Bureau.) 



Transactions of the Institution of Engineers and 

 Shipbuilders in Scotland. Fifty-sixth Session, 1912-13. 

 Part iv. Pp. 109 + diagrams. (Glasgow.) 



A Treatise on Hydromechanics. By A. S. Ramsay. 

 Part ii., Hydrodynamics. Pp. xiii4-36o. (London: 

 G. Bell and Sons, Ltd.) 



DIARY OF SOCIETIES. 



THURSDAY. February 27. 



POYA SoclETV, at 4.^0.— The Thermal Properties ofCarbonic Acid at Low 

 Temperatures : C. F. lenkin and D. R. Pye.— Re-reduclions of Dover 

 Tidal Observations, 18SJ-1SS4. etc^ : E. Roberts.— The Formation of tlie 

 Anthocyan Pigments of Plants. Part IV. The Chromogens : Prof. F. 

 Keeble, E. F. Armstrong, and W. M. [ones.— The Formation of the 

 Anthocyan Piements of Plants. Part V. The Chromogens of White 

 Flowers : W. N. Jones.— The Changes in the Breathing and the Blood at 

 Various High Altitudes : Mabel P. Fitzgerald. 



CoN'CRETi^ Institute, at 7.30. — Economy in Reinforced Concrete Design : 

 J. A. Davenport. 



Society of Dvehs and Colourists. at S.— Starch and Decomposition 

 Products : Dr M. Hamburg —A Method for the Testing of Malt Ex- 

 tracts : R. J. May.— The Valuation of Malt Products: W. P. Dreaper.— 

 .•\ Contribution to the Methods of Testing Malt Extracts : Dr. A. Herz. 



Institution of Electrical Engineers, at 8. — Fourth Kelvin Lecture— 

 The Ohm, the Ampere, the Volt, A Memory of Fifty Years (1862-1912) : 

 Dr. R. T. Glazebrook. 



FRIDAY, February 28. 



Royal Institution, at 9. — .Active Nitrogen : Hon. R. J. Strutt. 



Physical Society, at 5.— Interference by RJintgen Radiation : Prof. C. G. 

 Barkia and G. H. M.irtyn.— Alternating-current Magnets: Prof. E. 

 Wilson. -A Graphical Method of Optical Imagery : W. R. Bower. 



SATURDAY, M.^rch i. 

 Royal Institution, at 3 — The Properties and Constitution of the Atom : 



Sir J. J. Thomson, O.M. 



MONDAY. ^'ARCH 3. 

 Society of Engineers, at 7.3c.— Presidential Address ; A. Valon. 

 Aristotelian Society, at 8. — Does Consciousness "Evolve"?: Prof. 



L. P. Jacks. 

 Society of Chemical Industry, .at 8.— Notes on Chinese Antimony 



Ores, Crude and Regulus : W. R. Schoeller.— Notes on Ther.mometry': 



J. H. Coste. 

 Victoria Institute, at 4.30.— Pompei : E. J. Sewell. 

 Royal Society of Arts, at 8.— Cantor Lecture— Coal Gas as a Fuel for 



Domestic Purposes : F. W. Goodenough. 



i TUESDAY, March 4. 



Royal Institution, at 3.— 'I he Stars and their .Movement? : Prof. H. H. 



RoNTtiEN Society, at 8.15. — The Physiological Effects of the Magnetic 

 Field : Dr. H. Lewis Jones.— The Rationale of the Static Current: Dr. 

 H. Humphris. 



Royal Anthropological Institute, at 8.15.— .\ Saxon Graveyard at 

 Ea-t Shefiford, Berks : H. Peake and Dr. E. A. Hooton. 



Zoological Society, at 8.30. — Coniribuiions to the .Anatomy and Sys- 

 tematic .Arrangement of the Ce.stnidea. — IX. A New Genus of Ichthvo- 

 tffiniids ; Dr. F. E. Heddard. — Zoological Results of the Third Tanganyika 

 Expf-dition conducted by Dr. W. A. Cunnington, 1904-1905. Report on 

 the Branchiura : Dr. \V. A. Cunnington. — New Species of Rhopalocera 

 from Costa Rica: W. Schaus.— Notes on Plankton collected across the 

 Mouth of the St. Croix River opposite to the Biological Station at St. 

 Andrews, New Brunswick, in July and August, 1912 : Dr. A. Willey. 



Institution of Civil Engineers, at 8.— Notes on City P.issenger- 

 Transportation in the United States : G. D. Snyder. 



WEDNESDAY. March 5. 

 Geological Society, at 8.- The '■ Kelloway Rock" of Scarborough: 



S. .S. Buckm:in.— Jurassic .-Xmrnonites from JebelZorghuan (Tunis): L. F. 



Spath. 

 Entomological Society, at 8. 

 Society of Public Analysts, at 8.— The Accurate Determination of 



Carbon Dioxide in Carbonates : F. S. Sinnatt.— Egyptian Butter and j 



NO. 2261, VOL. 90] *V 



Semna : S. H. Trimen.— The Bacterial Testing of Disinfectants : A Prac- 

 tical Criticism : C. T. Kingz^tt and R. C. Woodcock.— .A Quick and 

 Improved Method for the Estimation of Boric Acid in Milk and Cream : 

 F. W. Richardson and W. K. Walton.-The Moisture in so nc English, 

 Colonial, and Foreign Butters during 1910-1912, with a Note on the 

 Mitchell-Walker Moisture Test : L. Gowing-Scopcs. 



Royal Society op Arts, at 8. — Ordinary Meeting — The Development of 

 Research Work in Forest Products : E. R. Burdon. 

 THURSDAY. March 6. 



Royal Society, at \.-^o.— Probable Papers: An Automatic Method for 

 the Investigation of the Velocity of Transmission of Excitation in Mimosa: 

 Prof. J. C. Bose.— The Evolution of the Cretaceous ."Vsteroidea : W. K. 

 Spencer.— A Preliminaiy Note on the Fossil Plants of the Mount Potts 

 Beds, New Zealand, collected by Mr. D. G. Lillie, Biologist to Capt. 

 Scott's Antarctic Expedition in the Terra Nova in 1911 : Dr. E. A. 

 Newell Arber. — (i) Trypanosomes found in the Blood of Wild Animals 

 Living in the Sleeping Sickness Area, Nyasaland ; (2) Tiypanosome 

 Diseases of Domestic Animals in Nyasaland. II. Trypanosoma Capra; 

 (Kleine) ; (3) Morphology of Various Strains of the Trypanosome causing 

 Dieases in Man in Nya-aland. I. The Human Strain : Surg. -Gen. Sir 

 D. Bruce, F.R.S., Majors D. Harvey, A. E. Hamerton, and Lady Bruce. 



RovAL Institution, at 3.— Surface Energy : W. B. Hardy. 



Institution of Electrical Engineers, at 8. — Recent Developments in 

 the Street Lighting of Manchester : S, I.. Pearce and H. A. Ratcliff. 



Royal Society of Arts, at 4,30. — Indian Section — The City of Karachi \ 

 J. F. Brunton. 



j'~R/DAY, March 7. 



Royal Institution, at 9.— Photography of the Paths of Paiticles Ejected 

 from Atoms : C. T. R. Wilson. 



SATURDAY. March S. 



Royal Institution, at 3. — The Properties and Constitution of the Atom : 

 Sir J. J. Thomson, O.M. 



CONTENTS. p.AGE 



Botany for Students 693 



Modern Physics. By E. R 694 



Philosophy and Psychology, llvj. AH 695 



Mathematical Text-books 697 



Our Bookshelf 69S 



Letters to the Editor: — 



On the Appeaiance of Helitim and Neon in Vacuum 

 Tubes.— Prof. J. NormanCollie.F.R.S.; Hubert 



S. Patterson 699 



The Occurrence of the Portuguese Man-of-War (Phy- 

 salia), and of a Giant Spider-Crab, Hoiiiola 

 (Paromola) iia'icri, in the English Channel. — 



J. H. Orton 700 



Actual Conditions affecting Icebergs. — W. Bell 



Dawson 700 



Fresh Light on the Cause of Cancer. By Dr. E. F. 



Bashford 701 



The International Aero Exhibition at Olympia . . 702 

 The Scientific Work of the Local Government 



Board. l!y R. T. H 703 



The Mountains and their Roots 703 



Sir William Arrol 705 



Notes 705 



Our Astronomical Column: — 



Astronomical Occuirinces for March 7'0 



The Solar Activity . 710 



Photographic Magnitudes of Stars in Coma Berenices 710 



The Distribution of Spectroscopic Binary Stars . . . 710 



High-level Measurement of Solar Radiation .... 710 



The Bleaching of Flour 710 



Reeves's Night Marching Watch . . 711 



The Vegetation of the Transcaspian Lowlands. By 



F. C 7" 



The "Aeroscope"' Kinematograph Hand Camera. 



l!yC. P. B , . 712 



The National Physical Laboratory 712 



Progress in Agricultural Education . 7'5 



University and Educational Intelligence 715 



Societies and Academies 7'^ 



Books Received 717 



Diary of Societies 7'^ 



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