142 W. C. CURTIS. 



has not yet reached such a point of general acceptance or rejec- 

 tion, but that it will bear further illustration in any case in 

 which there are facts particularly germane to the question and with 

 these two points in view I have attempted the foregoing for- 

 mulation. 



UNIVERSITY OF MISSOURI, 



COLUMBIA, Mo., May i, 1903. 



