662 REVIEWS 



Mineral Solution and Fusion Under High Temperatures and Pres- 

 sures. By Arthur L. Day. (Carnegie Institution of Wash- 

 ington, extracted from Fourth Year Book, pp. 224-30.) 



After a statement of the new equipment of the laboratory, the resuks 

 of experiments with feldspars and pyroxenes is given, and the paper closes 

 with a brief description of the author's visit to European laboratories. 



E. W. S. 



