No. 525] SHORTER ARTICLES AXD DISCUSSION 571 



The formula has perhaps an advantage, therefore, in suggest- 

 ing a definite usage of the concept of chance in these problems, 

 and also of suggesting, what writers sometimes confuse, the 

 marked difference between external and internal determining 

 factors. It rests upon a definite logical issue. Every scientific 

 problem arises in a more or less definite universe of discourse. 

 The limits of this universe of discourse determine the possibility 

 of discovering regularity among the experiences it defines. Such 

 internal regularity gives Law, its absence, chance. This defi- 

 nition, therefore, gives to chance a definite and precise meaning, 

 capable of an exact usage in scientific enquiries. It does not in- 

 volve the affirmation nor the denial of the ultimate uniformity 

 of nature. 



Arthur S. Dewing. 



