284
ON THE DURATION OF MACHINERY.
| Years. | Approximate number of Engines reported. |
Average duty of the whole. |
Average duty of the best Engines. |
| 1813 | 24 | 19,456,000 | 26,400,000 |
| 1814 | 29 | 20,534,232 | 32,000,000 |
| 1815 | 35 | 20,526,160 | 28,700,000 |
| 1816 | 32 | 22,907,110 | 32,400,000 |
| 1817 | 31 | 26,502,259 | 41,600,000 |
| 1818 | 32 | 25,433,783 | 39,300,000 |
| 1819 | 37 | 26,252,620 | 40,000,000 |
| 1820 | 37 | 28,736,398 | 41,300,000 |
| 1821 | 39 | 28,223,382 | 42,800,000 |
| 1822 | 45 | 28,887,216 | 42,500,000 |
| 1823 | 45 | 28,156,162 | 42,122,000 |
| 1824 | 45 | 28,326,140 | 43,500,000 |
| 1825 | 50 | 32,000,741 | 45,400,000 |
| 1826 | 48 | 30,486,630 | 45,200,000 |
| 1827 | 47 | 32,100,000 | 59,700,000 |
| 1828 | 54 | 37,100,000 | 76,763,000 |
| 1829 | 52 | 41,220,000 | 76,234,307 |
| 1830 | 55 | 43,350,000 | 75,885,519 |
| 1831 | 55[1] | 44,700,000 | 74,911,365 |
| 1832 | 60 | 44,400,000 | 79,294,114 |
| 1833 | 58 | 46,000,000 | 83,306,092 |
(342.) The advantage arising from registering the duty done by steam-engines in Cornwall has been so great that the proprietors of one of the largest mines, on which there are several engines, find it good economy to employ a man to measure the duty they perform every day. This daily report is fixed up at a particular hour, and the engine-men are always in waiting, anxious to know the state of their engines. As the general reports are made monthly, if accident
- ↑ These fifty-five engines consumed, on the average for the year 1831, 81,867 bushels of coals monthly, being 1488 bushels for each engine.
