392 REVIEWS 



History of the Clay Working Industry in the United States. By 



Heinrich Ries, Ph.D., and Henry Leighton, A.B. Pp. 270, 



with 8 plates and 3 figures. New York: John Wiley and 



Sons, 1909. 



The arrangement of this admirable book is very simple. In the first 



part the history of the clay- working industry is treated by products; in 



the second part the development in each state is taken up in alphabetical 



order. This manner of treatment necessitates more or less repetition, but 



it permits the presentation of a more connected chain of events for each 



district. 



A great amount of detailed statistical information has been gathered 

 together and made available for use. Through a historical record of iso- 

 lated facts, figures, and statistics, the authors of this treatise have such a 

 thorough command of the subject that they have instilled much of their 



own enthusiasm into its pages. 



R. T. C. 



Norsk geologisk tidsskrijt {Norwegian Geological Magazine) , Vol. I. 

 Kristiania; J. O. Brogger, bookseller, 1910. 



The geologists in Norway have formed an association, "Norsk geologisk 

 Forening," in Kristiania and published the first volume of a magazine. The 

 chief contributor is the well-known student of petrography and of the 

 geology of ore bodies, J. Vogt, who writes in German. His important 

 article on anchi-eutectic and anchi-monomineral eruptives is published 

 here. 



Th. Vogt (son of J. Vogt) has written a mineralogical article on barytes. 

 A. Hoel communciates new observations on the geology of Spitzbergen 

 (Norwegian with summary in English). The rest of the papers treat of 

 Norwegian geology. All but two have English summaries. 



Hans Reusch 



