1847. Mitchell, S. Augustus (Samuel Augustus), 1792-1868. Copyright entered by H.N. Burroughs.;Detached from an atlas, no. 31.;Includes table of steam boat routes.; Lead region.; Washington.;Relief shown p... Philad[elphi]a : S. Augustus Mitchell.
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1847. Mitchell, S. Augustus (Samuel Augustus), 1792-1868. Washington prime meridian. "Entered according to Act of Congress, in the year 1846, by H.N. Burroughs, in the Clerks Office of the Eastern District...
1847. Mitchell, S. Augustus (Samuel Augustus), 1792-1868. Longitude in degrees west from Greenwich and east from Washington, D.C.; latitude in degrees north from equator.; Colored by county; borders of sta... S.A . Mitchell (Philadelphia, Pa).