[Engravings and photogenic drawing in The mechanic and chemist]

Ackermann, Rudolph, 1764-1834 · 1839

"...three of the earliest attempts at illustrating the principles and results of the photographic process. The [wood engraving] negative-positive example of April 13, is the first pictorial example of the concept. The facsimile of the photogenic drawing [of insect wings, May 18] is the second published after THE MIRROR. The example of "Photogenic Printing" [May 25] is the first published example from a cliché verre created on glass and printed directly on the block."--Hanson collection catalog, p. 6