The Artizan . 170 to 290 revolutions, which latter corresponds to a circumferentialvelocity due to a head of 36ft. 6in., very nearly, as calculated by theformula given above; and if the quantity of water which one of thepumps should discharge when working at a mean velocity of 230 revo-lutions be calculated on the assumption that it is constructed in con-formity with the principles above enunciated, it is found that it shoulddischarge about 13i million gallons of water in twelve hours; and as thecapacity of one of the docks is rather better than 14 million gallons, one 1,18
The Artizan . 170 to 290 revolutions, which latter corresponds to a circumferentialvelocity due to a head of 36ft. 6in., very nearly, as calculated by theformula given above; and if the quantity of water which one of thepumps should discharge when working at a mean velocity of 230 revo-lutions be calculated on the assumption that it is constructed in con-formity with the principles above enunciated, it is found that it shoulddischarge about 13i million gallons of water in twelve hours; and as thecapacity of one of the docks is rather better than 14 million gallons, one 1,1865. J Work mid Vis-viva. 149 Fig. of these pumps should nearly empty it in a working day of twelvehours. The engines are horizontal, and have cylinders of 21in. diameterx 4ft. stroke, working expansively hy means of a cut off slide valve,and the maximum rate of expansion is about from \ of the stroke;they make from 30 to 50 revolutions. There are two wells, each ofthem, we presume, connected with its own dock,
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Keywords: ., bookcentury1800, bookdecade1840, booksubje, booksubjecttechnology
