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RELATION OF

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Originally appearing in Volume V05, Page 275 of the 1911 Encyclopedia Britannica.
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RELATION OF See also:

SURFACE-TENSION TO TEMPERATURE It appears from the experiments of See also:Brunner and of See also:Wolf on the ascent of See also:water in tubes that at the temperature I° centigrade T =75•2o (1-0.001870 (Brunner) ; =76•o8 (1—o•oo2t+0.0000041512), for a See also:tube •02346 cm. See also:diameter (Wolf) ; =77.34(1—o.00l8it), for a tube •03o98 cm. diameter (Wolf). See also:Lord See also:Kelvin has applied the principles of See also:Thermodynamics to determine the thermal effects of increasing or diminishing the See also:area of the See also:free surface of a liquid, and has shown that in See also:order to keep the temperature See also:constant while the area of the surface increases by unity, an amount of See also:heat must be supplied 275 to the liquid which is dynamically See also:equivalent to the product of the See also:absolute temperature into the decrement of the surface-tension per degree of temperature. We may See also:call this the latent heat of surf See also:ace-See also:extension. It appears from the experiments of C. Brunner and C. J. E. Wolf that at See also:ordinary temperatures the latent heat of extension of the surface of water is dynamically equivalent to about See also:half the See also:mechanical See also:work doi1e in producing the surface-extension.

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