freeing the scientist from the unavoidable imprecision of the artist's prints. So released, both have prospered and produced their impressive nineteenth- and twentieth-century outputs. It is this premise that William M. Ivins, Jr., elaborates in Prints and Visual Communication, a history of printmaking from the crudest wood block, through engraving and lithography, to Talbot's discovery of the negative-positive photographic process and its far reaching consequences.

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