54 



Colonel Sir Almroth E. Wright 



[March 9, 



sinks ; and at the same time the colouring matter from B is gradu- 

 ally conveyed up the wick in the direction of C, but is not carried 

 up in the direction of A. 



In the next experiment (Fig. 14) we have again a series of three 

 tubes arranged tandem and connected up by wicks as in the last 

 experiment. In A we have plain water, in B an albuminous fluid, 



i 



u 



.-> 



Fig. 14. — Tube A contains plain water, Tube B a watery solution 

 of cKU-albumen, and Tube C saturated salt solution. 



and in C saturated salt solution — all hlled in to exactly the same 

 height. As in the last experiment, tbe level of the fluid rises slowly 

 in C and sinks away in A and B. AVe then unship Tabes A and C, 

 add salt to A, and then boil both. We find that a great deal of 

 albumen has l)een carried over into (', and that none has diffused 

 over into A. 



