Reviews 



Gypsum Deposits of New York. By D. H. Newland and Henry 

 Leighton. New York State Museum Bulletin 143, Albany, 

 1910. Pp. 94. 



The bulletin presents a concise but complete description of the 

 gypsum deposits and the gypsum industry of the state of New York. 

 The workable deposits are restricted to the Salina state of the upper 

 Silurian and are pretty generally confined to a single formation of this 

 series, the Camillus shale. The geology of the Salina series is carefully 

 and clearly set forth. 



Considerable attention is given to general questions relating to the 

 origin of gypsum, its properties, and the theory of its transformation 

 into plasters. The reviewer is pleased to note that the section devoted 

 to the description of mines and quarries is much shorter than is usually 

 found in a report of this character. 



E. R. L. 



Report on a Part of the Northwest Territories Drained by the Winisk 

 and Attawapiskat Rivers. By William McInnes. Geol. 

 Survey of Canada, No. 1008. Pp. 54; Figs. 5; Map 1. 



In this report the author gives the results of a reconnaissance survey 

 of the country to the southwest of Hudson Bay. Adjacent to the bay 

 there are gently folded Silurian limestones and dolomites, probably 

 of Niagaran age. Outside this belt comes a belt of bowlder clay 160 

 miles in width, overlain by post-glacial marine clays, which, below the 

 Boskineig fall in the Winisk River, have an altitude of 350 feet above 

 sea-level. Beyond this again is the Laurentian peneplain, of Archean 

 granites and schists. This is the customary rocky-lake country, heavily 

 drift covered in places. Glacial striae on exposed rock surfaces indicate 

 a glacial movement toward the S.S.W. 



The writer also gives a general description of the canoe routes, flora 

 and fauna of the country, climate and possibilities of agriculture. 



H. C. C. 



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