1903.] 



of the Diffusion of Salts in Solution. 



213 



The vessel is then ready for the introduction of the salt solution, 

 which is allowed to drop into the funnel Ci from which it passes 

 through the pipe C into the vessel A, where it gradually floats the 

 water upwards and continually forces it out through the pipe B. 



It will be noticed that the water which is thus forced out is that 

 which lay below the point marked " level " ; after say an hour the 

 first portions of the salt solution reach the point marked " level " and 

 are then forced out, and ultimately the salt solution of the normal 

 density, i.e., the density used, occupies the lower half of the vessel, and 

 pure water occupies the upper half, and there is no mixing at the 

 common surface. 



