﻿Liquids under Capillary Pressure. 1155 



liquid from the tube wall. The rate of flow was determined 

 by means of a stop-watch at increments of 10 cm. along the 

 tube. In the following curves (I.) are shown the distance 

 traversed in various times for a series of aliphatic alcohols ; 

 and from these data the derived curves (II.) were obtained, 

 indicating the relationship between x and s/t, which, ac- 

 cording to the theory outlined above, should be linear for 

 values of a within a relatively wide range. 



Curves (I. 



40 60 



D /stance of trere/ /n cms. 



100 



The values of the penetration coefficients obtained from 

 the slope of these derived curves are given, together with 

 those calculated from the data on the viscosity and surface 

 tension given in the tables of Landolt-Bornst'ein according 



to the expression K = \/V , where r = 0*0 



$54 cm. 



