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A huge and impressive twenty three foot long chart showing 5,885 years of history, from 4004 B.C.. to 1881 A.D. First issued in 1871, Adams put out several editions in many formats. Rosenberg and Grafton in "Cartographies of Time" say that as a timeline, Adams Synchronological Chart "was ninetheenth-century America's surpassing achievement in complexity and synthetic power."
see note field above
Rosenberg and Grafton, pp 171-177.