AMERICAN NARCOTIC AND OTHER EXTRACTS. 205 
ART. XLIX. — ON AMERICAN NARCOTIC AND OTHER 
EXTRACTS. 
About four months ago the Editors of this Journal received 
from Messrs. Tilden and Co., of New York, four specimens 
of Vegetable Extracts prepared at their establishment at 
New Lebanon, New York, derived respectively from Co- 
nium, Hyoscyamus, Taraxacum and Sanguinaria, and the 
reception of which should have been acknowledged in our 
last number, but owing to accident they were overlooked at 
the proper time. 
The chief merits claimed by the manufacturers for these 
extracts, are such as arise from a proper selection of the 
crude material grown in their extensive botanical garden, 
and from a careful preparation of the extracts by means of 
apparatus for evaporation in vacuo. We have here all the 
elements for their successful fabrication — assuming that the 
plants are imbued with their natural medicinal force and 
that the operators understand the principles of the process. 
In reference to the specimens submitted, we will observe 
that whilst they present in an eminent degree the sensible 
properties of the plants they represent, we consider them to 
be deficient in a few particulars which we will notice, not 
in a hypercritical spirit, but with a view to the improvement 
of the articles noticed, so far as it can be done by hints. 
It may be well to state here that we believe that any manu- 
facturer who justly claims the patronage of pharmaceu- 
tists, should be careful to derive his products from the precise 
sources designated in our National Pharmacopoeia ; and 
avoid embracing in them any substance not called for in 
that authority. 
1st. Extract of Dandelion. — Thif extract is too soft, 
having a pulpy consistence ; the evaporation has not been 
carried far enough; it has an herbaceous odor, and dark 
olive green color, due to the chlorophyllin of the leaves, the 
