A text book of mycology and plant pathology
John W Harshberger
File Type :Online
Number of Pages :808
following pages represent in a much extended form the lectures and laboratory
exercises given by the author before his botanic classes at the University of
Pennsylvania, and before public audiences else- where, especially, Farmers'
Institutes with which he has had three years' experience as a lecturer in
Pennsylvania. The arrangement of the text has been suggested by the needs
of the classroom and from an acquaintance with similar work in other colleges
and universities in America.