Tables 140-142. 



CAPILLARITY. -SURFACE TENSION OF LIQUIDS. 

 TABLE 140. — Water and Alcohol in Contact with Air. 



TABLE 142. — Solutions of Salts in 



Water, t 



TABLE 141. — Miscellaneous Liquids in Contact with Air. 



• This determination of the capillar^' constants of liquids has been the subject of many careful experiments, but the 

 results of the different experimenters, and even of the same observer when tlie method of measurement is changed, 

 do not agree well to};ether. The values here quoted can only be taken as apjiroximations to the actual values for the 

 liquids in a state of purity in contact with pure air. In the case of water the values given by I.ord Raylcij;h from the 

 wave length of ripples (Phil. Mag. 1.S90) and by Hall from direct measurement of the tension of a flat film (Phil. Mag. 

 |8<)3) have been preferred, and the temperature correction has been taken as o. 141 dyne per degree centigrade. The 

 values for alcohol were derived from the experiments of Hall above referred to and the experiments on the effect of 

 temperature made by Timberg (Wied. Ann. vol. 30). 



The authority for a few of the otlier values given is quoted, but they are for the most part average values derived 

 J-om a large number of results published by different experimenters. 



t From ViilkMiann (Wied. Ann. vol. 17, p. 353). 



Smithsonian Tables. 



128 



