236 PHENOMENA DEPENDENT ON MOLECULAR PATHS 90 



lowest temperature employed by Warburg and von Bab o, 

 their observations are quite unrepresentable by the formula 

 with variable values of D, A, and B, and that, on the con- 

 trary, the assumption of the values 



A = 1-203, B = 0-000378, 



which I have found as mean values, is very satisfactory. 

 For the values of the coefficient of viscosity, which are 

 calculated from the formula 



97 = 0-000378 8* (1-203 - S)~* 



with the values of B given by Warburg and von Babo, 

 agree very well with those observed, as the following table 

 shows : 



Carbonic Acid at 25-1. 



When I attempted to calculate in like manner the other 

 numbers l obtained at higher temperatures, I found for the 

 magnitude A values which were so little greater than that 

 already found, viz. 1-203, that I thought I might assume 

 this value for all the series of experiments. I thus obtained 

 the following values for A and B at the temperatures 

 named : 



Whether and how far the values of 77 calculated from the 



1 I have submitted to calculation only those results of observation in 

 which the amount of air mixed with the carbonic acid was as small as 

 possible. 



