Lapham, Increase Allen, 1811-1875Entered for copyright by both Lapham and Silas Chapman. "Lith. by L. Lipman, Milmaukee." Includes "Geological section, from Prairie du Chien to Milwaukee." 1 map: col.; 56 x 51 cm, on sheet 71 x 56 cmJPEG942c53a3-4daa-43eb-a36a-3617d5d872a3engPublicA new geological map of Wisconsin prepared mostly from original observations; by I.A. Lapham.MapsWisconsin1869University of Michigan