TABLES 14O-142. 



CAPILLARITY. -SURFACE TENSION OF LIQUIDS.* 



TABLE 140. Water and Alcohol in Contact with Air. 



TABLE 142. Solutions ol Salts in 

 Water, t 



* This determination of the capillary 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 the method of measurement is changed, 

 do not agree we ll together. The values here quoted can only be taken as approximations 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 Lord Rayleigh from the 

 wave length of ripples (Phil. Mag. 1890) and by Hall from direct measurement of the tension of a flat film (Phil. Mag. 

 1893) have been preferred, and the temperature correction has been taken as o. i 4 i 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 other values given is quoted, but they are for the most part average values derived 

 from a large number of results published by different experimenters. 



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



SMITHSONIAN TABLES. 



128 



