IS 



Mr. F. T. Trouton. On the Motion under [June 1, 



Besides the foregoing, experiments were also made in which the 

 viscosity of the liquid through which the bubble passed was changed 

 in order to experimentally verify that the velocity varied inversely as 

 the viscosity in agreement with the theory. 



For this purpose the viscosity of glycerine was gradually reduced by 

 the addition of water, and the " time of descent " of a chloroform 

 bubble through a tube of the solution observed. This could be then 

 compared with that calculated from the theory by introducing the 

 value of the viscosity ascertained in each case. 



