Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 731
rent of air, so it is clear that thegreater the evaporation, the lowerthe temperature. If evaporation be made rapid enough,it is evident that sufficient cold willbe produced to freeze water. Thisis what happens in an artificial-iceplant. A liquid called ammonia is used becauseit evaporates very… … WHEKIC THE ICE IS MADE. The figure shows the most important parts ofthe artificial-ice plant. The large vat containsstrong brine; brine is used because it can becooled to zero without freezing. Coils of pipe runthrough this brine. The liquid ammonia, whichis kept in a tank under a pressure of 140…
Children's literature
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