A text-book on chemistryFor the use of schools and colleges . Why is this experiment deceptive? Do liquids conduct at all?How is heat disseminated in liquids ? Describe Fig. 58. D 74 PROPAGATION OF HEAT IN strata above, bring about a rapid dissemination of theheat. This may also be shown by taking a flask, Fig. 59yFig. 59. and filling it with water, in which some light substance, such as bran,is suspended. On applying a lampto the bottom of the jar, currentsare established in the wTater, risingup the centre and descending downthe sides of the liquid ; and in thismanner, new portions
A text-book on chemistryFor the use of schools and colleges . Why is this experiment deceptive? Do liquids conduct at all?How is heat disseminated in liquids ? Describe Fig. 58. D 74 PROPAGATION OF HEAT IN strata above, bring about a rapid dissemination of theheat. This may also be shown by taking a flask, Fig. 59yFig. 59. and filling it with water, in which some light substance, such as bran,is suspended. On applying a lampto the bottom of the jar, currentsare established in the wTater, risingup the centre and descending downthe sides of the liquid ; and in thismanner, new portions constantlypresenting themselves on the sur-face exposed to the flame, thewhole mass becomes uniformlyhot. The cause of this movement isdue to the fact that when water is heated it portions, therefore, which rest on the bottom ofthe vessel, and to which the heat is applied, as soon asthey become warm dilate, and, being lighter than before,rise to the top of the liquid, while colder, and thereforeheavier ones, occupy their place. In the vegetable world, advantage is taken of the non-conducting power of water in a very beautiful after sunset, the leaves and delicate parts of j:>lantsbe
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Keywords: ., bookcentury1800, bookde, booksubjectchemistry, booksubjectphysics
