506 Mr. T. Tate's Experimental Researches on the 



general rule the substance which has the higher absorbing power 

 for one liquid will also have the higher absorbing power for any 

 other liquid. 



Experiment X. 



The liquid used in this experiment was linseed oil, and the 

 absorbent was unsized paper, whose absorbing power for water 

 at 60° is expressed by the formula T = 3S 2 . The experiment 

 was made at two different temperatures. 



Taking the diffusibility of water as unity, that of the oil will 

 be expressed by \ I gj = *216. 



The results of this experiment also show that the rate of dif- 

 fusion is increased by an increase of temperature. Within cer- 

 tain limits, the diffusibility of different liquids seems to increase 

 proportionably with an increase of temperature. 



The following experiment was made to determine the diffusi- 

 bility of different solutions of starch in water. 



Experiment XI. 



The first solution of starch contained \ per cent, of starch, 

 the second 1 per cent., and the third 2 per cent. ; that is, the 

 weights of starch dissolved in the same weights of water were as 

 the numbers in the geometrical progression \, 1, and 2. The 

 absorbent used was unsized paper of high absorbent power. 



The results of the experiment gave the following formulas of 

 ascent of the different liquids : — 



Formulae of ascent. 

 Distilled water . . . . T=MS 2 

 Solution No. 1 . . . . T= 2 S 2 

 Solution No. 2 .... T=56S 2 

 Solution No. 3 . . . . T= 16 S 2 



Hence we find from equation (10), diffusibility of water being 

 unity, 



