1 osa 



vibrations. In agreement with Rutherford, Pkrrin, and otlieivs T sliall 

 assume the moment of" inertia of the atom to be very small, even 

 in comparison with ma'^ {m = mass, a = radius of the atom). Then 

 the frequency of this rotative vibration will be great compared with 

 V. In connection with this we shall put the energy of these vibra- 

 tions equal to zero, a)id entirely disregard possible atomic rotations. 



4. The rotation of the molecule. Of this we may assume for all 

 the cases of equilibrium that have been experimentally investigated 

 that they represent two degrees of freedom, which present the equi- 

 partition amount, whereas the rotation round J/j M^ practically has 

 an energy zero. We shall represent the position of the axis of the 

 molecule by the aid of the angles a and ^ indicating the longitude 

 and the latitude. 



Instead of equation (19) p. 88 loe. cit. we now find for the 

 number of dissociated pairs of atoms : 



n^ = N^e \'i dx^di/^dz-^ I m^ i d,v^di/^dc^ X 



X dx^dy^dzj niA dx^dif^dz^ =z ). . (19a) 





For the number of bound pairs of atoms we find, representing 

 the moment of inertia of the molecule by M : 



nu = N^e ^\e ^ t{i''fv)dxzdijzdzz{iiiy~\-rn^^dtKzdyzdzzyi 



m^m^ • . • • 



X dr dr sin^ adadiMf^dadS. = 



m,^m^ \ (19 'a) 



= N'e ^ {2jr{7n,-{-m^)<9fl-2 — — X 4 jr X 2^ .I/O» 



vh 



1 mm. 



For f,, depends on r through the term r\ which term 



2 m^+m, 



we shall call ^^y ■ In connection with this equation (18) loc. cit. must 

 now be written as follows: 



