420 



NATURE 



[July 24, 19 19 



Mechanism of typhoid infection in the rabbit. Anti- 

 typhoid vaccination by the mouth. — A. C. Hollande : 

 Pathogenic yeast forms observed in the blood of 

 Caloptentis italicus. — J. Dufrenoy : The parasitic dis- 

 eases of Cnethocampa pityocampa of Arachon pines. — 

 MM. Yamanouchi, Iwashima, and Sakakaiiii : Studv of 

 the influenza epidemic of 19 18-19. Experiments' on 

 fifty-two voluntary subjects proved that the virus is 

 filterable, and is found both in the sputum and in the 

 blood of infected persons. 



Sydney. 



Linnean Society of New South Wales, March 26. — Mr. 

 J. J. Fletcher, president, in the chair.— F. H. Taylor : 

 Australian Tabanidae, No. iv. One new genus is 

 proposed in the subfamily Tabaninte, and twenty-siji. 

 species and one variety, referable to the genera Silvius, 

 Cydistomyia, and Tabanus, are' described as new. — 

 T. Steel : The external parasites of the dingo {Canis 

 dingo, Blum.). The occurrence of two fleas {Cteno- 

 cephalus felis and C. canis), a larval tick (near Ixodes 

 holocyclus), and a louse (Trichodectus latus, or nearly 

 related species) is recorded from a full-grown, pure- 

 bred male dingo. — Dr. R. Greig-Sraith : The germicidal 

 activity of the eucalyptus oils, part i. When a serum- 

 suspension of M. aureus was absorbed in cotton and 

 placed in dilutions of the eucal3'ptus oils in olive oil 

 for two hours at 20° C, it was found that the bac- 

 tericidal power was proportional to the acidity of the 

 oils. The germicidal effect was not caused by the 

 acidity, but was assisted by it. .The effect upon 

 JB. coli communis was of much the same nature, 

 although the action of the acid was not so clearly 

 shown. The iodide reaction was no criterion as to 

 the germicidal value of the oils. The vapours of the 

 oils had a decided bactericidal action. 



April 30. — Mr. J. J. Fletcher, president, in the chair. 

 — Dr. R. J. Tillyard : The morphology and systematic 

 position of the family Micropterygidae (sens. lat.). 

 Introduction and part i. : The wings. This family 

 of archaic, moth-like insects has been regarded as 

 belonging to the order Lepidoptera until quite 

 recently, when Dr. T. A. Chapman, on one 

 hand, removed the genus Micropteryx alone to a 

 new order Zeugloptera, retaining Eriocrania and 

 its allies in the Lepidoptera, while, on the other. 

 Prof. Comstock has removed the whole family bodily 

 into the Trichoptera. The object of the paper was 

 to elucidate the morphology of the group and to 

 determine its correct ordinal position within the In- 

 secta. — A. H. S. Lucas: Notes on Australian marine 

 Algae. . No. ii. Descriptions of four new species. ^- 

 Dr. A. B. Walkom : A' collection of Jurassic plants 

 from Bexhill, near Lismore, N.S.W. The known 

 flora of the Clarence series in northern New South 

 Wales is increased from four species to eleven, the 

 additions indicating conclusively that the portion of 

 the series from which they were obtained is of Jurassic 

 age. This flora shows a closer resemblance to the 

 Jurassic flora of Victoria than to any other Austratian 

 flora of similar age. 



BOOKS RECEIVED. 



Four-Place Logarithmir and Trigonometric Tables, 

 together with Interest Tables. Edited by Prof. Louis C. 

 Karpinski. Pp. 30. (Michigan : George Wahr, 1918.) 

 30 cents. 



La Theorie Atomique. By Sir J. J. Thomson. 

 Pp. vi + 57. (Paris: Gauthier-Villars et Cie, 1919-) 

 2.40 francs net. 



Geodesie Topom^trique. Troisieme Fascicule. 

 Determination du Point par Relevement. Methode 

 du Service Hydrographique de la Marine Dite du 



NO. 2595, VOL. 103] 



"Point Approche." By Emile Balu. Pp. vi-l-57 + 

 2 plates. (Paris : Gauthier-Villars et Cie, 1919.) 

 6 francs net. 



Introduction. ^- la Chimie G^n^rale. Lois Fonda- 

 men tales de I'Atomisme et de 1 'Affinity Expos^es k 

 des Chimistes Debutants. By Prof. H. Copaux. 

 Pp. vi+2i2. (Paris: Gauthier-Villars et Cie, 1919.) 

 7.50 francs net. 



The Urethroscope in the Diagnosis and Treatment 

 of Urethritis. By Major N. P. L. Lumb. Pp. xii f 

 51+10 plates. (London: John Bale, Sons, and 

 Danielsson, Ltd., 1919.) los. 6d. net. 



Annual Reports on the Progress of Chemistry for 

 1918. Issued by the Chemical Society. Vol. xv. 

 (London : Gurnev and Jackson, 19 19.) 4s. 6d. net. 



Science and War: The Rede Lecture, 1919. By 

 the Right Hon. Lord Moulton. Pp. 59. (Cambridge : 

 At the University Press, 1919.) 2S. 6d. net. 



Smithsonian Institution : Bureau of American 

 Ethnologv. Bulletin 59. Kutenai Tales. By Franz 

 Boas. Together with Texts collected by Alexander 

 Francis Chamberlain. Pp. xii + 387. (Washington: 

 Government Printing Office, 1918.) 



Senior Practical Chemistry. By H. W. Bausor. 

 Pp. viii+217. (London: W. B. CHve, University 

 Tutorial Press, Ltd., 1919.) 35. 6d. 



A Dictionary of the Flowering Plants and Ferns. 

 By Dr. J. C. Willis. Fourth edition, revised and re- 

 written. (Cambridge Biological Series.) Pp. xii + 

 712 + lv. (Cambridge : At the University Press, 1919.) 

 20i-. net. 



CONTENTS. PAGE 



A Guide to Lens Calculations. By T. S 40'i 



Colloid-Chemistry. By A. F 401 



Physiology for Students and Practitioners .... 402 



Our Bookshelf 403 



Letters to the Editor :— 



Research and Service.— Sir James W. Barrett; 



Prof. Frederick Soddy, F.R.S .404 



Wild Birds and Distasteful Insect Larvae.— Dr. 



Walter E. Collinge 404 



Science and Salaries. — C . ... 404 



Modern Single-Observer Rangefinders, (Illustrated.) 



By James Weir French ..... 40'S 



The Bournemouth Meeting of the British Associa- 

 tion • • 407 



Notes 408 



Our Astronomical Column : — 



A Bright Meteor . . 4" 



The Light of the Aurora and the Auroral Line . . 411 



The Spiral Nebulae 4" 



Chemists in Conference 4^X 



Physiology and Metaphysics 412 



A League of Universities - _ • 4^3 



Science in Industry: Lectures at the British 



Scientific Products Exhibition 4^4 



Cotton and Cotton-seed Industries 414 



Collision of a- Particles with Light Atoms. By Sir 



E. Rutherford, F.R.S. 415 



University and Educational Intelligence 418 



Societies and Academies 4'9 



Books Received 420 



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