HYDROGEN INTO ATOMS 



157 



The data obtained by these experiments are given in Table II. In the 

 second and third columns are given the characteristics of the filament in 

 good vacuum (0.00007 mm.). Wr is expressed in watts per centimeter, 

 and R in ohms per centimeter. The figures in the other columns give the 

 differences between the observed power consumption at different pressures 

 and those in vacuum. 



DISCUSSION OF EXPERIMENTAL RESULTS 



The experimental data contained in Table I and II give, as a function 

 of both temperature and pressure, the total heat carried by the surrounding 

 hydrogen from a heated tungsten filament in this gas. 



It has been shown in the previous papers that this energy carried by 

 the gas can be resolved into two parts, Wc and Wd. 



W = Wc + Wd (i) 



The temperature coefficient of Wc is given by 



where 



Wc = S(^ — <pi) 



(2) 



