motor in cases where the 12 hours of the day, and the descending ones on EF, there was not at. one’s disposal a continuous feed which per- a screw, D, that actuates a crosspiece, c, movable between those of the night. These divisions will not all be exactly the two uprights of a frame affixed to… … Fig. 2.—EGYPTIAN HYDRAULIC CLOCK. . Fig. 1.—CONSTANT LEVEL APPARATUS. Fig. 8.-EGYPTIAN HYDRAULIC CLOCK SET IN ACTION BY THE SsvUN. Fig. 1 shows one of these apparatus. Let H T be the ves- with the height of the liquid above the orifice through which sel, in which a constant level is to be obtained…
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![An illustration from Essai de physique, par Mr. Pierre van Musschenbroek ... avec une description de nouvelles sortes de machines pneumatiques, et un recueil d'expériences par Mr. J. v[an] M[usschenbroek] Traduit du hollandois par Mr. Pierre Massuet .. (1751)](https://img.insideoutlibrary.com/img/200/ia-essaidephysiquep02muss-436-68.webp)
