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)
rcular disks Avhich fit closelyin the cylinder. As the wheel is revolved(usually by a crank) the diskssuccessively enter the cylinderand carry the water up beforethem, into the trough, fromwhich it is discharged. Thearrows indicate the directionof the movement. The chain pump is made invarious… … HYDRA ULICS. 1:21 lar intervals to a rope, have been substituted. It has been used in allcountries, and is extensively employed at the present day. It had itsorigin, probably, in China, many centuries ago. This pump seems to be the connecting link between the chain ofpots and the ordinary lifting…
Physics · Astronomy
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