25 



a = 



ta' s'-i r dr fa \ / a'\ 



S 



in vvhicli the quantit}' f/ for tlie lower limit passes into y*" — (<i*—.9'), 



, . , . ^ .. «'— *' 1— 't' 1 

 which becomes = O tor o) = = = — as before. The 



value of a will, therefore, again approach to logarithmically infinite 

 for fp = fp^=zl:k\ This is, accordingly, entirely independent of the 

 exponent t in the assumed law of force ƒ (v) .-. ?-—'. 



