ART OF BUILDING. 361 … intermittent supply, must be sufficiently large to allow ofits filling during the time the wateris turned on from the mains. Theflow of water into the cistern isregulated by a ball cock, so calledfrom its being opened and shut bya lever, with a copper ball, whichfloats on the surface of the water.…
Architecture · Building
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![An illustration from Rudiments of the art of building : represented in five sections [...] for the use of architects, builders, draghtsmen, machinists, engineers and mechanics (1853)](https://img.insideoutlibrary.com/img/200/ia-rudimentsofartof00bull-84-53.webp)
