940 Wisconsin Academy of Sciences , Arts , and Letters. 
Mohr 
1847 
Neuer Extractions Apparat fner Weingeist nnd Aether. 
Arch, der Pharm., 100, p. 305. [Am. Jonrn. Pharm., 21, 
P-117]. 
The apparatus consists of a two-necked Woulf’s bottle, figure 
78 p, into the central mouth of which the metallic vessel R, figure 
79, is fitted by means of a cork. The vessel R consists of a me¬ 
tallic cylinder a 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 intended to 
contain either hot or cold water. In the top of the inner cylin¬ 
der a, a slightly conical vessel c is made to fit air tight, as shown 
in the drawing. This vessel c is intended to be used as a con¬ 
densing apparatus, and for this purpose it is filled with cold 
water. From the second or lateral opening of the Woulf’s bot¬ 
tle, a glass or tin tube d, figure 78, is carried to the upper part of 
the cylinder a, where it is inserted as shown in figure 80. The 
cold water in the vessel c is renewed through the pipe e which 
conducts it to the bottom, while the warm water runs off from 
the top through the pipe /, figure 79. Hot or cold water is re¬ 
newed to the space between the two cylinders R by the tube 
funnel h, figure 78, and the water from this space overflows into 
g and is carried off together with that from /. The tube Ji is 
inserted through a perforated cork at i so that by turning the 
