[381] Philosoph. Transact. vol. lxv. part i. p. 126.
[382] Traité du Mouvement des Eaux.
[383] Du Hamel, Hist. de l’Academ. l. i. c. 3, p. 99.
[384] Tentamina Experimentorum Acad. del Cim. p. 183.
[385] Dissertation sur la Glace. Paris, 1749, 12mo, p. 187.
[386] Philosoph. Transact. vol. lxv. part i. p. 124.
[387] [In India, one mode of cooling wines, is to suspend the bottle in a thick flannel bag, or folds of blotting-paper, kept constantly wetted, and placed in the sun’s rays, or a current of air, or both; by which means the evaporation, and therewith intense coldness, is produced.]
[388] Philosoph. Transact. vol. lxxi. part ii. p. 511. [M. Boutigny’s beautiful experiment of making ice in a red-hot crucible is a striking phænomenon of this kind. It is thus performed:—A deep crucible of platinum is heated to a glowing red heat; liquid sulphurous acid, which has been preserved in the fluid state by a freezing mixture, and some water are then at the same instant poured into the crucible. The rapid evaporation of the volatile sulphurous acid, which boils below the freezing-point of water, produces such an intense degree of cold as to freeze the water, which is then thrown out of the crucible as a solid lump.]
[389] Philosoph. Transact. vol. lxxi. part ii. p. 252: the process of making ice in the East Indies; by Robert Barker.
[390] [There is no question that this refrigeration is caused by the evaporation of a portion of the water, whereby a very large quantity of heat becomes latent in the vapour. A clear serene sky being necessary for the success of the production of the ice, would tend to show that the further loss of heat by radiation, which always ensues to a great extent at nights, when the sky is clear, is necessary.]