i BULLETIN OF THE UNIVERSITY OF KANSAS 



' Vol. XXI. DECEMBER 1, 1919. No. 17. 



Science Bulletin 



Vol. XL 



(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. 



m 



I K ered as second-class matter December 29, 1910, at tJie post office at Lawrence. Kansas, 

 ! under the act of ,iuly 16, 1394. 



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