The Collaborative International Dictionary of English v.0.48:

Sciagraph \Sci"a*graph\, n. [See Sciagraphy.]
   1. (Arch.) An old term for a vertical section of a building;
      -- called also sciagraphy. See Vertical section, under
      Section.
      [1913 Webster]

   2. (Phys.) A radiograph. [Written also skiagraph.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sciagraphy \Sci*ag"ra*phy\, n. [Gr. ?, fr. ? drawing in light
   and shade; ? a shadow + ? to delineate, describe: cf. F.
   sciagraphie.]
   1. The art or science of projecting or delineating shadows as
      they fall in nature. --Gwilt.
      [1913 Webster]

   2. (Arch.) Same as Sciagraph.
      [1913 Webster]

   3. (Physics) Same as Radiography.
      [Webster 1913 Suppl.]