Reviews — Canada : Department of Mines. 427 



glad to be rid of the numbering of the entries, a troublesome and 

 annoying business to compilers, and a useless thing to readers in such 

 a work. We thank the Carabrid<ie Press for coming to the rescue of 

 the Royal Society and giving us this volume, and we congratulate 

 the Royal Society on the assurance that its great undertaking is now 

 secure to a conclusion. 



III. — Economic Geology. By Charles H. Eichaiidson". 8vo ; 

 pp. 320, ix, with 133 figures in the text. New York and 

 J^ondon : McGraw-Hill Book Company, 1913. 



LIKE many textbooks, Professor Richardson's Economic Geology 

 has emanated from a series of lectures given to students fi"om 

 year to year. The lectures on which this book is based were com- 

 menced some twenty years ago, so that the author is fully justified in 

 now giving them to a wider circle of students. The book deals only with 

 metals and their ores, but the author promises a companion volume on 

 non-metallic minerals, a textbook for which there must be considerable 

 demand. 



The treatment of the subject is methodical and simple. Metals are 

 classified as precious, useful, and rare ; the ' useful metals ' are taken 

 in the order of their chemical separation. Under each metal ai'e 

 considered its properties, ores, origin and distribution of ores, 

 method of extraction and uses. Special chapters deal with the 

 classification and origin of ore deposits, and there is a final chapter 

 giving statistical iuformation. 



The work is furnished with an excellent index and is illustrated by 

 133 photographs and diagrams, carefully chosen from the best books 

 on ore deposits. W P ^ 



IV. — Canada : Department of Mines. Geological Survey Guide- 

 books. Ottawa: Government Printing Bureau, 1913. 



ri HESE Guide-books were prepared for the use of members of tlie 

 I Twelfth International Geological Congress. They contain a large 

 amount of information relating to the geology and physiography of 

 the various areas visited by members of the Congress. 



There is a general introduction to each excursion, followed by 

 a fuller treatment of the country surrounding the special centres of 

 observation, which is copiously illustrated with maps, sections, and 

 photographs. Notes are also given in explanation of the features of 

 tlie country seen en route. 



Space does not permit of even a cursory survey of the valuable 

 matter in these little books ; it must sufiice to give a bare list of 

 contents. 



No. 1 (2 parts). Excursion in Eastern Quebec and the Maritime Provinces. 

 (A useful general geological map of Canada, on the scale of 100 miles to an inch, 

 is included.) 



No. 2. Excursions in the Eastern Townships of Quebec and the Eastern 

 part of Ontario : — 



The Haliburton-Bancroft area of Central Ontario. 

 Asbestos Deposits of the Province of Quebec. 

 Mineral Deposits near Kingston, Ontario. 



