Op"ti*graph (?), n. [Optic + -graph: cf. F. opticographe. See Optic, a. ]

A telescope with a diagonal eyepiece, suspended vertically in gimbals by the object end beneath a fixed diagonal plane mirror. It is used for delineating landscapes, by means of a pencil at the eye end which leaves the delineation on paper.

 

© Webster 1913.

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