THE NUMBER A1TD DISTRIBUTION 



■ OP TRIALS III ' " IN 



THE 7/HITE RAT. 



BY JOHN I. UXRIOH. 



1913. 



Dissertation submitted to the 

 Board of University Studies 

 of the 

 Johns Hopkins University 

 in conformity with the require- 

 ments for the degree of 

 Doctor of Philosophy. 



