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hectographChromograph Chro"mo*graph, n. [Gr. ? color + -graph.]
An apparatus by which a number of copies of written matter,
maps, plans, etc., can be made; -- called also hectograph. HectographHectograph Hec"to*graph, n. [Gr. ? hundred + -graph.]
A contrivance for multiple copying, by means of a surface of
gelatin softened with glycerin. [Written also hectograph.] hectographHectograph Hec"to*graph, n. [Gr. ? hundred + -graph.]
A contrivance for multiple copying, by means of a surface of
gelatin softened with glycerin. [Written also hectograph.] Perspectograph
Perspectograph Per*spec"to*graph, 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.
Perspectography
Perspectography Per`spec*tog"ra*phy, n.
The science or art of delineating objects according to the
laws of perspective; the theory of perspective.
Meaning of Ectograph from wikipedia