REVIEWS 



Geology and Ore Deposits of the Yanahara Mining District, Province 

 of Mimasaka, Japan. By Takeo Kato. Japanese Journal 

 of Geology and Geography, Transactions and Abstracts, 

 Vol. I, Nos. 3-4, Tokyo, 1922, pp. 77-116, plates XIII-XVIII 

 and text-figures 1-13. 

 These numbers of Volume I are devoted principally to a report in 

 English by Professor Takeo Kato, of the University of Tokyo, on the 

 geology and ore deposits of the Yanahara mining district, formerly a 

 producer of oxidized iron ores, now an important producer of high-grade 

 pyritic ores. The deposits are shown to be replacement deposits in 

 metamorphosed rocks, both igneous and sedimentary. The presence of 

 pyrrhotite, tourmaline and actinolite indicate high temperature condi- 

 tions of formation. The mineralizing solutions, it is clear, came from 

 the batholitic intrusions of granitic rocks common in the region. 



On pages 31 to 48 a number of abstracts in English are given of 

 geologic papers published in Japan. 



E. S. B. 



Bulletin of the Geological Society of China, Volume I, 1922, and 

 Volume II, 1923. Published by the Society, Peking, China. 



There has come to the Editor's desk Volumes I and II of the Bulletin 

 of the Geological Society of China, published at Peking. The Geological 

 Society of China was organized in the Library of the Geological Survey 

 in Peking in January, 1922, with twenty-six charter members. The 

 president of the new society is Dr. H. T. Chang, chief of the Division 

 of Geology of the Geological Survey. 



The Bulletin, published in English, is the official organ of the Society 

 and will contain proceedings of the meetings and papers presented at 

 the meetings either in full or in abstract. Its editor is Dr. V. K. Ting, 

 director of the Geological Survey. 



Among the longer articles in Volumes I and II dealing with problems 

 of Chinese Geology are: "The Sinian System," by Amadeus W. Grabau, 

 professor of petrology in the National University of Peking; "The 



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