 | William Pole - 1844 - 282 ページ
...of five strokes per minute. During eight months ending with April, 1814, it had consumed only 12,671 bushels of coal, performed the average duty of 30'5...engine maintained its standing to the end of the year 1814, so that its average duty for the twelve months was 32 millions.92 This was the best engine at... | |
 | Thomas Young - 1845 - 660 ページ
...of 5 strokes per minute : during eight months, ending with April 1814, it had consumed only 12,671 bushels of coal, performed the average duty of 30-5...and worked at the rate of 5'7 strokes per minute." And from the same work it appears, that the average duty had, up to 1834, increased from 26-5 to 00... | |
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April, 1814, it had consumed only 12671 bushels of coal, performed the average duty of 30,5 millions, and worked at the rate of 5,7 strokes per minute. Thus pumping from a deeper mine, a seventh part more water, with the consumption of 7440 bushels of... 