The Collaborative International Dictionary of English v.0.48:

Electroscope \E*lec"tro*scope\, n. [Electro- + -scope: cf. F.
   ['e]lectroscope.] (Physics)
   An instrument for detecting the presence of electricity, or
   changes in the electric state of bodies, or the species of
   electricity present, as by means of pith balls, and the like.
   [1913 Webster]

   Condensing electroscope (Physics), a form of electroscope
      in which an increase of sensibility is obtained by the use
      of a condenser.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cinematograph \Cin`e*mat"o*graph\, n. [Gr. ?, ?, motion +
   -graph.]
   1. an older name for a movie projector, a machine,
      combining magic lantern and kinetoscope features, for
      projecting on a screen a series of pictures, moved rapidly
      (25 to 50 frames per second) and intermittently before an
      objective lens, and producing by persistence of vision the
      illusion of continuous motion; a moving-picture projector;
      also, any of several other machines or devices producing
      moving pictorial effects. Other older names for the movie
      projector are animatograph, biograph, bioscope,
      electrograph, electroscope, kinematograph,
      kinetoscope, veriscope, vitagraph, vitascope,
      zoogyroscope, zoopraxiscope, etc.

            The cinematograph, invented by Edison in 1894, is
            the result of the introduction of the flexible film
            into photography in place of glass.   --Encyc. Brit.
      [Webster 1913 Suppl.]

   2. A camera for taking chronophotographs for exhibition by
      the instrument described above.
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

electroscope
    n 1: measuring instrument that detects electric charge; two gold
         leaves diverge owing to repulsion of charges with like sign