Perspectograph \Per*spec"to*graph\
(p[~e]r*sp[e^]k"t[-o]*gr[.a]f), n. [L. perspectus (p. p. of
perspicere to look through) + -graph.]
An instrument for obtaining, and transferring to a picture,
the points and outlines of objects, so as to represent them
in their proper geometrical relations as viewed from some one
point.
[1913 Webster]