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Steam power in France
422
Mechanics, Physics, and Chemislry.
washed by machinery, as a cook could do it for your dinner. Then, by the action of machinery, they are separated from tile dirt, stones, and sticks, and pass on to two cylinder graters, at the rate of 100 bushels an hour. From the graters, by the action of machinery, they go into the sieve that separates the starch from the potato. The pulp then passes into four large cisterns, and then, again, machinery pumps it into the 64 large tubs or cisterns, before alluded to, fbr settling. Then the water is drawn off, and the starch, by a forcing-pump, is carried into the second story, and, when settled, put into the oveu I have before spoken of, which is calculated to bake a day's work being the starch from 1000 bushels, or 60,000 Ibs. of potatoes. The starch is packed in casks, and shipped East. The cost of the factory is $12,000. Considerable starch was made last season, but the rotting df some 30,000 bushels of potatoes last fall, curtailed the quantity anticipated. This large quantity of the raw material was thrown away. It served to feed many cattle and hogs of the neighborhood tbr some months. The pulp remaining as worthless, is used in fattening hogs, which the proprietor has in a yard adjoining. The factory price for potatoes is 10 cents a bushel. Mr C. has contracted with various farmers to the amount of 400 acres. The average number of bushels raised last year on an acre was 275. Allowing the same this year, it will amount to over 100,000 bushels ; but this is not half the quantity wanted. Farmers were unwilling to contract, fearing the rot. Present indications are good for the crop. All varieties are used, even the Rohan. It takes the fall and winter to destroy the potatoes, then wheat and corn are used for the same purpose. The quantity made from the potato per year will not be far fi'om 1,000,000 lbs., or 400 tons. It sells for $5 a hundred in New York. Hunt's Mereh. Mag.
Fusion of Mercury. The result of M. Person's experiments on the congelation of mercury, and the latent heat of fusion, is that the heat requisite for the fusion of mercury is about eight times that required to change the temperature of water one degree. M. Person observes that the quantity Of heat necessary for the filsiou of metals is according to the order of their tenacity. Cir. Eng. & Arch. Jour.
Steam Power in France. It appears from a recent official return that the total number of steam engines in France in 1845 was '207 ; in 1840, it was only 109. Another return respecting the produce of the iron mines states that in 1845 the quantity of iron cast was 439,000 tons, whereas in 1825 the quantity was only 190,000. The price of bar iron, which in 18'25 was 48f. the 100 kilogrammes, was in 1845 only 34f. Ib.
Mechanics, Physics, and Chemislry.
washed by machinery, as a cook could do it for your dinner. Then, by the action of machinery, they are separated from tile dirt, stones, and sticks, and pass on to two cylinder graters, at the rate of 100 bushels an hour. From the graters, by the action of machinery, they go into the sieve that separates the starch from the potato. The pulp then passes into four large cisterns, and then, again, machinery pumps it into the 64 large tubs or cisterns, before alluded to, fbr settling. Then the water is drawn off, and the starch, by a forcing-pump, is carried into the second story, and, when settled, put into the oveu I have before spoken of, which is calculated to bake a day's work being the starch from 1000 bushels, or 60,000 Ibs. of potatoes. The starch is packed in casks, and shipped East. The cost of the factory is $12,000. Considerable starch was made last season, but the rotting df some 30,000 bushels of potatoes last fall, curtailed the quantity anticipated. This large quantity of the raw material was thrown away. It served to feed many cattle and hogs of the neighborhood tbr some months. The pulp remaining as worthless, is used in fattening hogs, which the proprietor has in a yard adjoining. The factory price for potatoes is 10 cents a bushel. Mr C. has contracted with various farmers to the amount of 400 acres. The average number of bushels raised last year on an acre was 275. Allowing the same this year, it will amount to over 100,000 bushels ; but this is not half the quantity wanted. Farmers were unwilling to contract, fearing the rot. Present indications are good for the crop. All varieties are used, even the Rohan. It takes the fall and winter to destroy the potatoes, then wheat and corn are used for the same purpose. The quantity made from the potato per year will not be far fi'om 1,000,000 lbs., or 400 tons. It sells for $5 a hundred in New York. Hunt's Mereh. Mag.
Fusion of Mercury. The result of M. Person's experiments on the congelation of mercury, and the latent heat of fusion, is that the heat requisite for the fusion of mercury is about eight times that required to change the temperature of water one degree. M. Person observes that the quantity Of heat necessary for the filsiou of metals is according to the order of their tenacity. Cir. Eng. & Arch. Jour.
Steam Power in France. It appears from a recent official return that the total number of steam engines in France in 1845 was '207 ; in 1840, it was only 109. Another return respecting the produce of the iron mines states that in 1845 the quantity of iron cast was 439,000 tons, whereas in 1825 the quantity was only 190,000. The price of bar iron, which in 18'25 was 48f. the 100 kilogrammes, was in 1845 only 34f. Ib.