REMARKS ON OLEO-RESINOUS ETHEREAL EXTRACTS. 117 
tral mouth of which the metallic vessel (R, fig. 12) is fitted 
by means of a cork. 
The vessel R consists of a metallic cylinder [a, figs. 11 
and 12,) having a perforated strainer (k) near the bottom, 
and terminating with a funnel-neck, to admit of its being 
fitted into the Woulf's bottle. This cylinder is surrounded 
by a second cylinder (b,) the space between them being in- 
tended to contain either hot or cold water. In the top of 
the inner cylinder (a) a slightly conical vessel (c) is made 
Fig. 11. Fig. 12. 
Apparatus for making Ethereal Tinctures. 
to fit air-tight, as shown in the drawing. This vessel (c) is 
intended to be used as a condensing apparatus, and for this 
purpose it is filled with cold water. From the second or 
