PREFACE TO THE FIRST EDITION 
The aim has been to eliminate from this book all those topics that 
are of minor importance to the student and practitioner of Phar- 
macy. As a pharmacist and teacher, the writer feels that the botan- 
ical preparation for Pharmacognosy and Materia Medica, in those 
colleges where Botany is given for one year, should include mainly 
the structural and systematic aspects of the science. In the Medico- 
Chirurgical College, of Philadelphia, Botany is taught the first year, 
extending over a period of 155 hours. The author has introduced in 
this concise volume the important subject matter of his lectures given 
to first year students, and has omitted laboratory directions for the 
obvious reason that fixed subjects for laboratory study are unneces- 
sary. It is not a book on Pharmacognosy, however, since it does not 
describe how one drug differs from another of the same group in all 
of its details. 
The work is included in two parts. Part I is largely devoted to the 
morphology (gross and minute) and, to a less extent, the physiology 
of the Angiosperms. Part II deals with the taxonomy of plants, 
mainly but not wholly of medicinal value, together with the parts 
used and the names of the official and non-official drugs obtained 
from these. 
The author does not claim sole originality for the facts presented, 
but has consulted many sources of information, mention of which will 
be found in the bibliography of the text. 
Acknowledgment is here rnade to his esteemed friends, Dr. Fran- 
cis E. Stewart of the Medico-Chirurgical College and Dr. John M. 
Macfarlane of the University of Pennsylvania, for valuable assis- 
tance in the reading of the proofs and preparation of the index. 
H. W. Y. 
Philadelphia. 
