Photo-copying from tracings
By: Keuffel & Esser
Publisher: Keuffel & Esser
Published: 1888
Place of publication: New York
Language: eng
Number of pages: 12
Notes: Cover title.

"Blue process (negative). Nigrosine process (positive). Chromide dry process (positive). Cyanotype process (positive)".

"Prices of material and full directions for printing".

"May, 1888".