- THE AUTHORS’ PREFACE. 
Ty the present work, the “ Principles of Pharmaceutical 
Materia Medica” (Grundlagen der Pharmaceutischen Waa- 
renkunde), by F. A. Fliickiger, published in 1873, appear 
in a revised form, and materially extended. In this second 
edition, the above-named author has undertaken chiefly the 
preparation of the first part, and the newly associated author 
(A. Tschirch), the second part, comprising morphology and 
anatomy, so that really a new book has been produced. Al- 
though the original plan has been essentially retained, the 
arrangement of the material within the more extended space 
has, nevertheless, necessitated numerous changes. 
It seemed to us appropriate in this revision to also take into 
consideration those crude substances of the vegetable kingdom 
possessing an organic structure which receive technical appli- 
cation. On the other hand, zoology has now been but inci- 
dentally considered, for the reason that pharmacognosy has to 
treat of only a very limited number of animal substances. 
With regard to the classification of tissues, we have thought 
it proper to follow Haberlandt’s “ Physiological Plant 
Anatomy” (Physiologische Pflanzenanatomie), Leipzig, 1884, 
_ which, besides the anatomical consideration of tissues, also 
elucidates their physiological functions. In our capacity as 
teachers, we have acquired the experience that an anatomical a 
ae description becomes of much more interest to the pupil by a oe 
oh reference to a relations, ee. the — : 
af Oe . 
