( 305 ) 



of coordinates and the space of velocities. Also if we do not neglect 

 the collisions a motion of the ensemble will take place in the moments 



Zir 



CO 



Fig. l. 



between the collisions in the indicated direction, so to the state with 

 uniform mean density in the narrow strips extending lengthwise over 

 a small but finite distance, hounded by the same combinations of 

 velocities (symbolically represented by the horizontal regions a of 

 fig. 2). In consequence of the collisions, however, the mean density 

 in narrow vertical regions approaches uniformity. Nor need these 



comb, of place 



FiK. 2. 



comb, of velocities 



