THE TEMPERATURE OF LIQUIDS. CREIGHTON 



167 



TABLE II. 



Calculation of the Fluidity of Octane (A) from the Fluidities of 



Benzene (B). 



c = 0.000354. 





Observed 









Differ- 





absolute 



Ratio of 



Calcu- 





Observed 



Temperature 



observed 



lated 

 absolute 



Calcu- 

 lated 



ence 







Fluidity 



Octane® 



Ben- 

 zene^ 



Temper- 

 atures 



Temp- 

 rature 



Fluidity 



calc. 

 minus 







Ta 



273.1 



Tb 



287.6 



Ta-Tb 



Ta 





 142.6 



obs. 



142.2 



0949.7 



273.4 



+ 0.4 



163.2 



283.1 



296.8 



0954 . 0* 



283.1 



163.2 



0.0 



174.8 



288.1 



301.3 



0955.7 



288.1 



174.8 



" 0.0 



185.9 



293.1 



306.1 



0957.6 



293.0 



185.7 



-0.2 



197.4 



298.1 



310.8 



0959.1 



298.0 



197.2 



-0.2 



209.0 



303.1 



315.5 



0960.5 



303.2 



209.2 



+ 0.2 



233.7 



313.1 



324.9 



0963 . 7 



313.1 



233.7 



0.0 



259.4 



323.1 



334.1 



9967.3 



322.8 



258.8 



-0.6 



286.1 



333.1 



343.3 



0970.1 



333.2 



286.3 



+ 0.2 



6. Landolt-BSrnstein, "Physikalisch-Chemische Tabellen.' S. 78, Berlin 1912. 



7. Ibid., S. 80 



The preceding examples are only a few of those that have 

 been studied. In most cases the agreement between the cal- 

 culated fluidity values and those determined by experiment is 

 closer than the fluidity values determined by two different in- 

 vestigators. This agreement indicates that this method can 

 be applied to the calculation of the fluidity or viscosity of liquids 

 with a close approximation of the truth. 



In order to calculate the fluidity of a liquid A from the known 

 values of another liquid B, the fluidity of the former is deter- 

 mined at any two temperatures T'a and Ta . The ratios 

 T'a Ta 



— -- = R' and • = R are then obtained, the values plotted 



T'b Tb 



as abscissae against the absolute temperatures T'b and Tb as 



ordinates, and a straight line drawn through the two points. 



