392 THE BOTANISTS OF PHILADELPHIA. 



training, his theoretical knowledge of pedagogy being 

 obtained in 1892-93, while a member of the University 

 Extension Seminar. 



Having combined <^ith his studies for the bachelor's 

 degree the branches leading to the degree of Doctor of Philos- 

 ophy, in June, 1893, he was granted that degree by the Uni- 

 versity, having prepared as a thesis, " Maize : A Botanical 

 and Economic Study," which was published in Vol. I, No. 2, 

 Contributions from the Botanical Laboratory, University of Penn- 

 sylvania. This piece of work was noticed favorably in 

 botanical journals, both at home and abroad. The pam- 

 phlet of one hundred and twenty-five pages was later trans- 

 lated into Spanish by Dr. Nicolas Leon, of Mexico.* 



In 1893 he was appointed Instructor in Botany, 

 Biology and Zoology at the University, in the Veterinary 

 Department, where he teaches botany, general biology and 

 zoology, and in the School of Biology, where he teaches 

 botany. In order to make his lectures in the Veterinary 

 School more attractive and interesting. Dr. Harshberger 

 drew in colored crayons a series of three hundred or 

 more botanical and zoological wall charts. These are 

 mounted on muslin, the crayon being fastened perma- 

 nently to the black pattern paper by means of gum mastich 

 dissolved in alcohol. In the fall of 1896 Dr. Harshberger 

 was appointed a lecturer in the Philosophical Faculty of 

 the University, where, as one of the teachers, he will give 

 instruction to the student candidates for the degree of 

 Doctor of Philosoph3^ 



For three years, ending 1895, he was one of the staff of 



* El Maiz. Estudio Botdnico y Econdmico por John W. Hars[h]t>erger, Ph. D., 

 (Universidad de Pensilvania) Traduccion, octavo, 164 pp. Mexico. 1894. 



1 



i 



