a y 



DISEASE IN PLANTS 



BY 



H?" MARSHALL WARD, Sc.D., F.R.S. 



FELLOW OF SIDNEY SUSSEX COLLEGE, HONORARY FELLOW OF CHRIST's COLLEGE 

 AND PROFESSOR OF BOTANY IN THE UNIVERSITY OF CAMBRIDGE 



PRESIDENT OF THE BRITISH MYCOLOGICAL SOCIETY, AND FELLOW OF THE 



LINNEAN AND ROYAL HORTICULTURAL SOCIETIES ; HONORARY FELLOW 



OF THE MANCHESTER LITERARY AND PHILOSOPHICAL SOCIETY 



AND OF THE BOTANICAL SOCIETY OF EDINBURGH 



MACMILLAN AND CO., Limited 



NEW YORK: THE MACMILLAN COMPANY 

 I9OI 



A II rights Reserved 



