MEW YOR1 

 j&OTANICAl 

 v GARDEN 

 Bulletin No. 33 April 13, 1900 



THE PUBLICATIONS OF 



The University of Arizona Agricultural Experiment Station 



An Inquiry into the Cause and Nature of 



Crown-Gall 



By J. W. TOUMEY 



WASHINGTON, D. C. 



JUDD & DETWEILER, PRINTERS 



1900 



