| Anna Atkins Introduction to "Photographs of British algae: cyanotype impressions", Part I [Photographs of British algae: cyanotype impressions. Part I] 1843, October (Part I) Cyanotype NYPL - New York Public Library Courtesy of The New York Public Library www.nypl.org, Image ID: 419691 LL/39578 "The difficulty of making accurate drawings of objects so minute as many of the Algae and Confervae has induced me to avail myself of Sir John Herschel’s beautiful process of Cyanotype, to obtain impressions of the plants themselves, which I have much pleasure in offering to my botanical friends."
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