HOLMAN. — THERMO-ELECTRIC FORMULA. 



211 



TABLE IX. — Continued. 

 Exponential Equation. — Data minus Equation in Per Cent. 



Discussion of the Deviations. 



Plots are given in the following diagram with temperatures as 

 abscissas and percentage deviations between the data and the sundry- 

 equations as ordinates, i. e. 100 8/e where 8 = data-equation. Inspec- 

 tion will show that with one exception (viz. the logarithmic equation 

 applied to the Barus data) these plots, whether the equation is the 

 ordinary parabolic, the Avenarius, the Barus, the exponential, or the 

 logarithmic, have the same general form, which may be imperfectly 



