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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1857 Excerpt:...steam is cut off at-fths the stroke. Am. 3-476 cubic feet. 250. Kequired the pressure of steam in the cylinder of an engine before expansion, if the steam be cut off at fths the stroke, the dimensions of the cylinder being 54 inches diameter, length of stroke 4 feet 4 inches, and number of revolutions 21; the boilers evaporating 3 cubic feet per minute. Here diameter=54 inches=4-5 feet. Velocity=4x42 = 182 feet. Log. 33-7=1-527969 Ana. 33-7 lbs. 251. If the boilers of an engine evaporate 250 cubic feet an hour, what will be the pressure of the steam in the cylinder before expansion, its diameter being 70 inches, length of stroke 6 feet, steam cut off at fths the stroke, and the number of revolutions of crank 16? Ana. 52-5 lbs. 252. Find the diameter of the cylinder of an engine to develop 150 horae-power when the steam is cut off at-§ths the stroke, the length of stroke being 5 feet 4 inches, and number of revolutions of the crank 18, if the boilers evaporate 1 2 cubic feet per minute. Here velocity=36 x5J=192 feet. Log. 1-2=-079181 Constant log.= 6-531475 Tup (0-133858 From Table E=J.002201 2)-768978 Log. 2-42=-384489 2-42 x 12 = 29-04 inches. Am. 253. Find the diameter of the cylinder of an engine of 100 horse-power, if the number of revolutions of the crank, when the steam is cut off at f the stroke, is 20, the length of stroke being 5 feet, and the evaporation of the boiler 1 cubic foot a minute. Am. 5 feet nearly. 254. Having given the diameter of a cylinder 80 inches, the length of stroke 7 feet 10 inches, the number of revolutions of crank 12, and the pressure of steam in the boiler (by the gauge) 15 lbs., before the expansion, which takes place at f the stroke; find the requisite evaporating power of the boiler. Here diameter = 6-666 feet, Velo...