Definitions for "Water glass"
See Soluble glass, under Glass.
An instrument consisting of an open box or tube with a glass bottom, used for examining objects in the water, as upon the sea bottom in shallow places.
A water gauge for a steam boiler.
Keywords:  clepsydra
A clepsydra.
a cylindrical lens, focusing light horizontally but not vertically
Keywords:  clock, escape, measures, time
clock that measures time by the escape of water