ABSCISSION OF FLOWERS AND FRUITS IN 



THE SOLANACEAE, WITH SPECIAL 



REFERENCE TO NICOTIAN A 



A THESIS SUBMITTED IN PAETIAL SATISFACTION OF 

 THE EEQUIEEMENTS FOE THE DEGEEE OF 



DOCTOE OF PHILOSOPHY 

 AT THE UNIVEESITY OF CALIFOENIA 



BY 



JOHN NORMAN KENDALL 



MAY, 1917 





