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Introduction to "Photographs of British algae: cyanotype impressions", Part I
[Photographs of British algae: cyanotype impressions. Part I]
1843, October (Part I)
New York Public Library
Courtesy of The New York Public Library www.nypl.org, Image ID: 419691
"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 Herschelís beautiful process of Cyanotype, to obtain impressions of the plants themselves, which I have much pleasure in offering to my botanical friends."