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From MapHist.com - Dictionary of Mapmakers M Samuel Augustus Mitchell converted the maps in Tanner's atlas from copperplate engravings to lithography, enabling longer print runs. The Universal Atlas continued to 1859. About this time S.A. Mitchell Jr. took over the firm and in 1860 introduced Mitchell's New General Atlas which was published in large numbers for many years. The Mitchell firm dominated American commercial atlas publishing at this time This Article was published on MapHist.com - http://www.MapHist.com |