= polygraph, n. 2. Obsolete.

An instrument for making multiple copies of a document, etc.; = polygraph, n. 2. rare. Now historical.

An instrument, operating on the principle of the pantograph (pantograph, n. 1), for simultaneously producing two or more identical copies of a…

an apparatus on which copies of a handwritten document can be made.

A machine for producing facsimile copies of writing, drawings, etc.

An apparatus for multiplying copies of writing: = chromograph, n. 2. Also applied to the process of taking copies by means of this.

An apparatus for, or the process of, duplicating and multiplying copies of writing by means of a gelatine slab and aniline or similar ink.