SCIOPTIC

, or Scioptric Ball, a sphere or globe of wood, with a circular hole or perforation, where a lens is placed. It is so fitted that, like the eye of an animal, it may be turned round every way, to be used in making experiments of the darkened room.

SCIOPTRICS. See Camera Obscura.

SCIOTHERICUM Telescopium, is an horizontal dial, adapted with a telescope for observing the true time both by day and night, to regulate and adjust pendulum clocks, watches, and other time-keepers. It was invented by Mr. Molyneux, who published a book with this title, which contains an accurate description of this instrument, with all its uses and applications.