﻿314 Profs. J. N. Mukherjee and B. C. Papaconstantinou on 



Table I V. 

 Barium Chloride. 



Concentrations. 



Times. * *• -. 



0-852N/9OO. 0-852N/1000. 0-852N/1100. 



— 00453 0-0453 0-0453 



1 0-2257 — 0-1603 



2 0-2867 — 0-2007 



4 0-3529 — 0-2687 



5 0-3836 0-3051 0-3051 



7 0-438 0-3431 0-3237 



8 0-4497 0-3336 



9 0-4497 03836 0-3529 



11 — 0-4263 0-363 



13 — 0-4497 0-363 



16 — 0-3732 



The limits within which the rate of coalescence could be 

 varied were restricted by the fact that when the rate is 

 slow the particles begin to settle, leaving a clear layer 

 at the top, and the measurements are not reliable. Also, 

 with time, some of the particles stick to the sides of the 

 vessel. Lastly, it is difficult to avoid dust particles for 

 a long time. 



The values given in Tables II.- V. were plotted graphi- 

 cally, and the time intervals given in Tables V.-VI1. below 

 were determined from these curves. 



Each of these curves is characterized by a definite value 

 of T (or e). Corresponding to the three concentrations of 

 any one of these electrolytes, there are three intervals which 

 must pass in order that the absorption coefficient may have 

 the same value. These intervals are co-related by the 

 following relation according to equations (1) to (3) 

 or (6) :— 



h _ ^2 % 



T, ~ T, ~ IV 



(11) 



1 x 2 



or 



^:t 2 :^ 3 = T 1 .T 2 :T 3 = i:i:-. .... (12) 

 e t e 2 e 3 



Since T 1? T 2 , and T 3 are constant, the ratio of the time- 

 parameters corresponding to the same absorption coefficient 

 should be independent of the absolute value of the absorp- 

 tion coefficient. Corresponding to different values of the 

 absorption coefficient we get different values of t l9 t 2i and t 3 . 

 All these values should show a constant ratio. In the 



