REMARKS ON OLEO-RESINOUS ETHEREAL EXTRACTS. 119 
powder, was put iuto the cylinder at R, and eight ounces 
of ether poured over it. The ether was nearly all absorbed 
by the powder, and scarcely anything passed into the bottle 
below : four ounces more of ether was therefore added? 
when a strongly-coloured solution passed. Heat was now 
applied, so as to boil and evaporate the ether, and in a few 
minutes afterwards a deep green liquor began to drop from 
the cylinder. As the heat was continued and increased 
the returning liquor increased in quantity, so as to run in a 
stream, until the perfect exhaustion of the worm-seed was 
indicated by the return of colourless ether. The apparatus 
was now taken out of the warm water, and allowed to 
cool. The cold water was in the next place removed from 
the space between the cylinders a and 6, by turning down 
the tube h, and the water was also emptied out of the con- 
denser (c.) The tube d was removed, the neck of the bot- 
tle into which this had been inserted being at the same time 
closed with a cork ; while from the opening into the cylin- 
der, where the other end of the tube d had been inserted, 
a tube was fixed connecting it with a Liebig's condenser. 
Hot water was now poured through the funnel and tube h 
into the space between the cylinders, which, heating and 
vaporising the ether with which the powder was saturated, 
caused it to distil over through the condenser. This being 
completed, the vessel R and its appendages was removed 
from the Woulf's bottle, and a tube made to connect the 
mouth of the bottle with the Liebig's condenser; when hot 
water being again applied to the bottle, the ether distilled 
off, until a syrupy liquor was left, which was finally evapo- 
rated to the consistence of butter in a porcelain dish. 
The eight ounces of worm-seed was thus completely ex- 
hausted in an hour and a half, with twelve ounces of ether, 
of which nine ounces was again recovered by distillation, 
and the resulting extract weighed ten drachms. With 
greater care in the condensation of the ether, I think ano- 
ther ounce might have been recovered. 
