------------------------------------------------------------------------ | UP TRIP, | DOWN TRIP, | | AUG. 27, 1844. | AUG. 28, 1844. | ----------------------------+---------------------+----------+----------| |"Ontario."| "New |"Ontario."| "New | | | England."| | England."| | (Copper | (Iron | (Copper | (Iron | | Flues.) | Flues.) | Flues.) | Flues.) | ----------------------------+----------+----------+----------+----------| Time, running | 9h. 7m. | 7h. 41m.| 10h. 44m.| 8h. 19m.| " standing at stations. | 4h. 2m. | 3h. 7m.| 2h. 12m.| 3h. 8m.| Cords of wood burned | 6.68 | 5.50 | 6.94 | 6. | Cubic feet of water | | | | | evaporated | 925.75 | 757.26 | 837.46 | 656.39 | Ratio, cubic feet of water | | | | | to a cord of wood | 138.57 | 137.68 | 120.67 | 109.39 | ------------------------------------------------------------------------ The conditions of the experiments not being absolutely the same in each case, the results could not of course be accepted as entirely accurate. They seemed to show, however, no considerable difference in the evaporative efficacy of copper and iron tubes.