Topographical drawing and sketching : including applications of photography (1888)
Reed, Henry A. (Henry Albert), 1844-1930 author · New York : John Wiley & Sons, 15 Astor Place · leaf 259
obtained, to almost any degree, by em- ploying the usual process of retouching. Enlargements or reductions to any desired scale are readily effected by the ordinary photographic process. In applying the tangent-glass, it is more convenient to place the negative, film down, upon its etched face, and… … and ruler and triangle may be applied without inconvenience. The negatives also should be labelled so as to be readily identified. To prepare prints for accurate plotting, proceed as follows: Construct a duplicate of the tangent-glass lines on the film of an exposed, blank, developed and fixed dry…
Topographical drawing · Photographic surveying
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
