Preface to the Fifth Edition 
Since the fourth edition of this volume was issued, there have 
been notable advances in the development of pharmaceutical 
botany. A new United States Pharmacopceia and a new 
National Formulary have appeared. The Commonwealth 
Fund Educational Research Committee has rendered its report 
on the study of Pharmacy from the functional standpoint and 
in it the findings of its botanical studies. 
These events alone made some additions and alterations of 
the text necessary. But the writer has gone further. A large 
part of the text has been rearranged, rewritten and amplified 
with a view toward improving the clarity of certain portions of 
the subject matter, and extending its adaptability. 
More than a hundred pages of new matter and one hundred 
and twenty-four new figures comprising original drawings and 
photographs and borrowed cuts from classic works have been 
added, and some of the older illustrations have been replaced 
by better ones. 
The botanical findings of the Commonwealth Fund Educa- 
tional Research Committee have been incorporated, although 
the text is not limited to these. 
Sufficient new information has been added to make the book 
a distinct improvement over the former editions, and this should 
make it better for use in professional pharmaceutical colleges 
and for the courses in botany now prescribed for Pre-medical 
students in academic colleges, as well as for students in Bachelor 
of Science courses in colleges of pharmacy. 
The table of contents clearly indicates the changes made in 
the form of the text which now contains twenty-five chapters; an 
increase of sixteen over the previous edition. 
It is believed the increased number of chapters and their 
new sequence will be found convenient for teachers in assigning 
work alike for study and collateral reading. 
It is hoped that the new edition will also be of value to 
research students in various fields of botany, since it furnishes in 
the classified list of reference works a summary of a large 
amount of literature of the subject. HOW. Y. 
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