132 BULLETIN OF THE 



of the Quincy ; Messrs. Cooper and Patch, of the Detroit and Portage 

 Lake smelting-works ; G. D. Bolton, M. E., and Capts. Hoatson, Dan- 

 iel, and Wells, of the Calumet and Hecla; Mr. Frank Osburn, of the 

 Troy Polytechnic School ; Agent Delano, of the Phoenix ; and espe- 

 cially to Agent B. F. Emerson and Captain John H. Moyle, of the 

 Copper Falls mine ; and others. 



Cambridge, Mass., May 18th, 1880. 



