CINEMATOGRAPH n.
A machine, combining magic lantern and kinetoscope features, for projecting on a screen a series of pictures, moved rapidly (25 to 50 a second) and intermittently before an objective lens, and producing by persistence of vision the illusion of continuous motion; a moving-picture machine; also, any of several other mach…
CRYSTAL n.
um carbonate, brought from Iceland, and used in certain optical instruments, as the polariscope. -- Rock crystal, or Mountain crystal, any transparent crystal of quartz, particularly of limpid or colorless quartz.