the allowance ofwater. The drum of a seventeenth-century clepsydrashown in the illustration, was so constructed by meansof water compartments that the contained water, perco-. lating from one to another of the divisions, would con-tinually alter the centre of gravity and, resisting thetension of… … Parish Church Clock, with detail of weights. of the apertures in the bottom of the water compart-ments. So it may be seen that this form of clepsydrawas really a gravity clock, water being used as a kindof counterweight. The sands of time is, to be sure, a pleasingfigure, but it suggests no more to…
Pottery · Glass · Glassware
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
