IZ^]o'^' 



-ji 



BULLETIN OF THE UNIVERSITY OF KANSAS 



Vol. XXI. 



MARCH 15, 1920. 



No. 6. 



Science Bullettn 



Vol. XII, Nos. 1 and 2 



(Continuation of Kansas University Quarterly.) 



LAWRENCE, KANSAS 



Published Semimonthly from January to June and Monthly from July to 

 December, inclusive, by the University of Kansas. 



Entered as second-claes matter December 29, 1910, at the post office at Lawrence, Kansas, 



under the act of July 16, 1894. 



8-3058 



