Blake, William P. (William Phipps), 1826-19101 map : col. ; 55 x 85 cm"Accompanying the report of Rossiter W. Raymond, United States Commissioner of Mining Statistics."The Base is the Military Map of the United States by permission of the Chief Engineer.JPEGG 3701 .C5 1872 .H500093231339015091195209engPublicGeological map of the United StatesMapsUnited States1872University of Michigan