482 



NATURE 



[December 26, 1912 



marriage customs of the Gehara Kanjars, who are an 

 endogamous section of an aggregate of tribes of a 

 gi[)sy-like character scattered all over northern India, 

 .ire remarkable for two or three survivals. The authors 

 find a strict observance of the primintive exogamic law, 

 a proper recognition of the occupational origin of the 

 tribe, a reverence for the tribal token, beater oVdeal 

 by way of consulting the oracle, and mock combat 

 between the bride's and bridegroom's respective par- 

 ties.— Dr. P. C. Ray and Rasik Lai Datta : Isomeric 

 allylamines. — Rasik Lai Datta : The preparation and 

 decomposition of monochloro- and dichloro-benzyl- 

 amines. — Jitendra Nath Rakshit : Action of stannic 

 chloride on phenylhydrazine. 



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Grundzuge der allgemeinen Phytopathologie. By 

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Fortschritte der naturwissenschaftlichen Forschung. 

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Abhandlungen iiber den mathematischen Unterricht 

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The Entomologist's Log-book and Dictionary of the 

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The History of the Collections contained in the 

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Catalogue of the Mammals of Western Europe 

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The Genus Iris. By VV. R. Dykes. With 47 

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Miners' Nystagmus: its Causes and Prevention. 

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The Works of .Aristotle. Translated into English 

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Churchill.) 



A. Galle. 

 Teubner.) 



under the Editorship of J. A. Smith and W. D. Ross. 

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A History of Chemistry from the Earliest Times 

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Mathematische Instrumente. By Prof. 

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Hereditv and Memory, being: the Henry Sidgwick 

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CONTENTS. PAGE 



American Anthropology, By Rev. John Griffith . 457 



Ceramic Chemistry. By W. B 457 



Two Books on Heredity. By L. Doncaster .... 458 



Photographic Annuals , . 459 



Our Bookshelf 460 



Letters to the Editor: — 



The Natiual Fr.acture of Flint. (Illustrated.)— I. 



Reid Moir 461 



Excitalion of 7 Rays by o Rays. — ^J. Chadwick ; 



A. S. Russell 463 



The Prickly Pear in Western China.— Prof. T. D. A. 



Cockerell 464 



Anthropology in India and Malta. (lUusti-ated.) . . 464 



New Hydrogen Spectra 466 



Pellagra 467 



Notes 467 



Report of the Development Commissioners .... 472 

 Recent Publications on the Fertility of the Soil. 



By E. J. R 473 



Upper Air Investigations 474 



Bird Notes. By R. L . 475 



Stock Diseases and their Suppression in South 



Africa P.y Dr. Arnold Theiler, C.M.G 475 



University and Educational Intelligence 47S 



Societies and Academies • . 479 



Books Received ; . . . 482 



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