Sinossi
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: ..." " 2, 64 " " 4. Two steam engines constructed for the island of Ceylon, working 10 hours per day for 300 days in the year, will convert 5760001b. of paddy5 into rice worth £116035, while by the common method, the same quantity of paddy converted into rice, would yield only £64799.c Allowing £20000 per annum, for interest, repairs, and the extra expense of working the machinery, what is the average daily amount saved by each engine? Arts. 104Z. 2s. 4.8c?. a As the piston must move forward and back at each stroke, the distance passed through per minute is 160ft. fa Rice in the husks. c Partington. 5. An engine at the Wheal Hope mine, in Cornwall, works 8 pumps, the length of stroke of each being 8ft.; their pistons support and lift at each stroke, columns of water, whose joint weights are 277661b., and in the month of December, 1826, they made 261890 strokes.4 Required the velocity per minute, and the tatal dynamical effect.b Ans. Velocity 46.93ft.; effect 1303058.381b. 6. The working effect of 1 bushel of coals, or the number of pounds which could be raised 1ft. high by 1 bushel is called the Duty of the engine. Required the duty of the engine in the preceding example, the amount of coal consumed being 1242 bushels. Ans. 46838246. 7-10. A cubic foot of water makes 1689 c. ft. of steam, at the temperature of 212.c Estimating the pressure of the atmosphere at 2120 lb.a on a square foot, what will be the dynamical effect of 1 lb. of each of the following kinds of fuel?d 5 §8. The Water-wheel. The pressure of water on any surface is equal to the weight of a column of water with the same base as the surface pressed, and of a height equivalent to the depth of the centre of gravity. If the surface is of any regular shape, th...
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