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. 1877 Excerpt: ...which is represented in Fig. 26-4, is for domestic use, as the quantity of ice it can produce is small. The larger apparatus constructed by the same inventor for the commercial manufacture of ice is arranged differently. A is the boiler where the solution of ammonia is heated. The gas which escapes from it is carried ...
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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. 1877 Excerpt: ...which is represented in Fig. 26-4, is for domestic use, as the quantity of ice it can produce is small. The larger apparatus constructed by the same inventor for the commercial manufacture of ice is arranged differently. A is the boiler where the solution of ammonia is heated. The gas which escapes from it is carried to the receiver, B, where it liquefies by cooling, C is a reservoir out of which a jet of cold water constantly runs to renew the water in the receiver. The liquefied gas passes on to fill the hollowed sides of the refrigerator, G, where vessels filled with the water to be frozen are placed. The water of the boiler, deprived of its dissolved gas and cooled, then passes into a vessel, E, which is in communication with D, and with the refrigerator. The liquid ammonia resumes the gaseous state, to dissolve again in the water in the vessel E, and it is by the cold caused by this evaporation that the water freezes in the vessels Fio. 2it;.--Carry's large apparatus for tV artificial manufacture of ice. placed within the refrigerator. The water restored to its original state again, is raised by a pump, F, to the boiler, so that the manufacture of ice goes on in an almost continuous manner. We next give some further details on the artificial production of ice based on the cold that results, not only from the brisk evaporation of a liquid, but from the solution of certain substances. The cause is still a change of state, but here it is a liquefication of a peculiar kind, requiring molecular work, and, in consequence, absorbing a more or less considerable quantity of heat. The set of substances thus mixed to produce cold is called a freezing mixture. The following are some of the freezing mixtures most commonly employed: --Two parts of snow or pounded ice..
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