The Collaborative International Dictionary of English v.0.48:

Papyrograph \Pa*pyr"o*graph\, n. [Papyrus + -graph.]
   An apparatus for multiplying writings, drawings, etc., in
   which a paper stencil, formed by writing or drawing with
   corrosive ink, is used. The word is also used of other means
   of multiplying copies of writings, drawings, etc. See
   Copygraph, Hectograph, Manifold. [Obsolescent]
   [1913 Webster +PJC]