ON THE METHOD OF DISPLACEMENT. 
189 
ART. XXVII. — OBSERVATIONS ON THE METHOD OF DIS- 
PLACEMENT. By Augustine Duhamel, and William Proc- 
ter, Jr. (Sequel to the Essay on same subject, Art. I. , No. 1, Vol. IV., 
New Series, of this Journal. ) 
In a somewhat detailed notice of this new process, and 
its adaptation to the ordinary operations of pharmacy, pub- 
lished in one of the foregoing numbers of this Journal, the 
attempt was made by one of the authors of this communica- 
tion to attract the attention of the profession towards some 
of its advantages, in the expectation that the subject would be 
followed up by our colleagues generally, and be made the 
theme of experiment, by which its merits might be properly 
tested, and accordingly appreciated. But from the little that 
has been said about it, and the apparent want of knowledge 
concerning its adaptation, we are sensible that something fur- 
ther is needed. Conscious of this, we have entered upon the 
present essa)^, with the view to contribute the sum of our 
joint experience in the application of the displacement sys- 
tem to some of the most essential preparations of medicines, 
that are brought into daily requisition ; hoping by a candid 
statement of facts connected with the results, together with 
the more tangible proofs in the exhibition of the products 
themselves, to do away with all prejudices, and convince the 
most sceptical that the great advantages, said to be derived 
from its employment, are not chimerical. 
The superiority of the method of displacement over the 
usual mode of preparing medicines, as directed by our Phar- 
macopoeia, has not escaped the sagacity of the French phar- 
maceutists. In France, this method has been extensively ap- 
plied, with almost invariable success, whilst in this country 
it is hardly known, much less applied. 
Impressed with the great advantages which would result 
from its introduction into American Pharmacy, we feel con- 
strained to make these observations at this time, while it is 
yet within the power of the revisors of our Pharmacopoeia, to 
