OF 



VEGETABLE HISTOLOGY 



1 1 



BY 



cTw. BALLARD 



Associate Professor of Materia Medico, and Director of the Microscopical 



Laboratory, College of Pharmacy, Columbia University. Microanalyst, 



Department of Health, City of New York 



NEW YORK 



JOHN WILEY & SONS, INC. 



LONDON: CHAPMAN & HALL, LIMITED 

 1921 



