CONCERNING THE EFFECT OF GRAVITY ON THE CONCENTRATION 

 OF A SOLUTE. BY HAROLD S. DAVIS, B. A., Dalhousie 

 College, Halifax, K S.* 



Read 3 1st May, 1911. 



Suppose that a solution of uniform concentration is placed 

 in a tube of constant cross-section and of vertical height, 7, and 

 is exposed to the influence of gravity. 



In general the concentration must now change throughout 

 the solution in order to produce equilibrium which obtains after 

 an infinite time. 



If (Fig. 1) the height <4_ A, 



of the tube is represented 

 by M N", and the concen- 

 tration at any point by a 

 distance x perpendicular 

 to M. N, then x will trace 

 out a line A B represent- 

 ing the concentration of 

 the solution at any point. 

 At the beginning, A B will 

 be a straight line parallel 

 to xy. At final equil- 

 ibrium it will be a straight 

 line which )is in general 

 inclined to M N". See L. 

 Vegard, Contributions to 

 the Theory of Solutions, 

 Phil. Mag., series 6, no. B, 

 77, page 258). For any 

 time t less than infinity, A B will represent the distribution of 

 the solute. 



* Published in this part by porinision of the council of the N. S. Institute of 

 Science. 



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