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NEW YORK STATE MUSEUM 



The mines are mainly open pits, but drifts may be run from the 

 sides or bottom along the course of the ore and mining carried on 

 partly underground. The stripping varies from a few feet to over 

 loo feet. In the deeper bodies it would appear that underground 



The southeastern limonite district (after Putnam) 



work with caving might be introduced and would be more economical 

 than stripping so much cover. A few mines were worked through 

 vertical shafts. The abandoned open pits are now filled with water to 



