BULLETIN OF THE UNIVERSITY OF KANSAS 



VOL. XXI. MARCH 15, 1920. No. 6. 



SCIENCE BULLETIN 



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-class matter December 29, 1910, at the post office at Lawrence, Kansas, 

 under the act of July 16, 1894. 



