[NATURAL HISTORY - UNITED STATES GEOLOGICAL SURVEY]. A pair of atlases, comprising:

VAN HISE, Richard. Atlas to Accompany Monograph XXVIII on the Marquette Iron-Bearing District of Michigan. Washington, D.C., 1896. 36 maps, most colored. Original gilt-lettered brown cloth. -- CLEMENTE, Julius M. Atlas to Accompany Monograph XLV on the Vermillion iron-bearing District of Minnesota. Washington, 1903. 23 maps, many colored. Original gilt-lettered brown cloth. -- Together, 2 works in 2 volumes, bother folios, BOTH FIRST EDITIONS, condition generally very good.