Conduction of Heat by Rarefied Gases. 203 



J *(*+0*(flrff- J«(»-©#(B<*?- const. + sf *(f)rff. (6) 







where 



d=^ 



.f *«)*(?)# + 0*. 



1 + /3 



(7) 



# means the temperature of the plate, and </>(£) is an abbre- 



i _± 

 viation for the integral 0(f) = f Ay <fy ; the meaning of ft is 



o 

 explained later on. This is the same equation as has 

 been found, in a somewhat specialized form, by Kundt and 

 Warburg, and applied to the slipping of a gas. 



Fig. 3. 



p 1 c 



By 



7 



X 



Its solution, which can be effected by several methods 

 of approximation, gives the curve CC, representing the tem- 

 perature Q(x) as a function of the distance from the plate a 9 

 as shown in fig. 3, where the value of ft is supposed to be 



