Uhe 



Botanical (Ba^ette 



B /fcontbls Journal Embracing all departments ot botanical Science 



dited by John M. Coulter, with the assistance of other members of the botanical staff of the 



University of Chicago. 



Issued July 15, 1912 



Vol. LIV 



CONTENTS FOR JULY J912 



No 



nil: DEVELOPMENT OF THE VASCULAR STRUCTURE OF DIAXTHERA AMERI- 

 CANA (with PLATES i-iv). \V. Ralph Jon --------- 



THE TOXIC ACTION' OF ORGANIC COMPOUNDS AS MODIFIED BY FERTILIZER 



SALTS (with five figures). Oswald Schr r and /. J. Skinner - 



THE EFFECT OI EXTERNAL CONDITIONS UPON THE AFTER-RIPENING OF THE 



SEEDS OF CRATAEGUS MOLLIS. Contributions from the Hull Botanical 

 Laboratory 157. Wilmer E. D is and R. Callin Rose 



E STRUCTURE OF THE STOMATA OF CERTAIN CRETACEOUS CONIFERS 

 (with pl.yti and vi). IE. P. T; mpson --------- 



BRIEFER ARTICLES 



Eduard Strasburger (with two 1 rtraits). Charles J. Chaml lain - - - - 



:jrrent literature 



BOOK REVIEWS - - - - - - 



THE CHICAGO TEXTBOOK. AN ELEMENTARY TEXT 



1 



9 



6 



6 





MIXOR OT1CES --------------- 7 6 



NOTES FOR STUDENTS - - - - - - 77 



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