THE DYNAMICAL THEORY OF GASES. 



A, 



sin' = 2'6595 ........................... (15), 



The paths described by molecules about a centre 

 of force S, repelling inversely as the fifth power of 

 the distance, are given in the figure. 



The molecules are supposed to be originally 

 moving with equal velocities in parallel paths, and 

 the way in which their deflections depend on the 

 distance of the path from S is shewn by the dif- 

 ferent curves in the figure. 



3rd. Integration with respect to dN,. 



We have now to integrate expressions involving various functions of r,. 

 , and V with respect to all the molecules of the second sort. We may 

 write the expression to be integrated 



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