892 



REVIEWS 



Van Hise and others 1 have discussed the geology of the 

 Lake Superior region in previous reports, both general and 

 detailed. The present report is a summary of the earlier reports, 



1 See especially " Principles of Pre-Cambrian Geology," in Sixteenth Annual 

 Report, Part I, U. S. Geol. Surv.; pp. 571-874; Bulletin No. 86, U. S. Geol. Surv.; 

 Monographs U. S. Geol. Surv., Vol. XIX, XXVIII, XXXVI; and Folio U. S. Geol. 

 Surv., No. 62. 



