Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
ng a tight-working fit. SeeFig. 42, Chart 4 (353). Operation. — As the wheel isturned, tiie wings, working water-tight in the case, drive the waterbefore them through the valve intothe discharge-pipe, H ; and the butment, F, rising and ftiUing on theface of tiie wings, prevents the water from… … 177. Figure 22.— Double cog-wheel rotary pump.— This is one of the oldest rotary steam-engines, but now principally HYDRAULICS. 127 employed as a suction and force pump, for wliicli purpose it is a power-ful machine. It consists of two cog-wheels, the teeth working water-tight intoeach other, and…
Physics · Astronomy
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