Pr 



olume LXVII 



Number 2 



THE 



Botanical Gazette 



Editor:. JOHN M. COULTER 



FEBRUARY 1919 



Blister Canker of Apple Trees; A Physiological and Chemical Study. 



Contributions from the Hull Botanical Laboratory 246 



Dean H. Rose 105 

 iWith ten figures) 



Morphology of the Genus Actinomyces. H - - Charles Drechsler 147 



(With Plates H-IX) 



Briefer Articles 



Byron David Halsted ------- Mel. T. Cook 169 



(With portrait) 



Current Literature 



Book Reviews - - - - - - - - - - -1 71 



Soil conditions and plant growth 



Minor Notices - - - - - - - - - - -173 



Notes for Students - - - - - - - - - -174 



The University of Chicago Press 



CHICAGO, ILLINOIS, U.S.A. 



THE CAMBRIDGE UNfVERSlTY PRESS, London and Edinburgh 



THE MARUZEN-KABUSHIKI-KAISHA, Tokyo. Osaka. Kyoto. Fukaoka. Sendai 



THE MISSION BOOK COMPANY. Shanghai 



