946 Wisconsin Academy of Sciences, Arts, and Letters. 
of tinned copper, which distributes the ether over the surface of 
the drug when it has been volatilized by placing the receiver 
in hot water. After the exhaustion of the drug, the receiver is 
removed, the lower orifice of the percolator closed, and the head 
well refrigerated; a stream of hot water is then passed into the 
jacket ar‘ound the percolator, by which means the contained 
ether may be recovered. 
- 1886 
Remington’s Practice of Pharmacy 1886, p. 366. 
The apparatus consists of a cylindrical percolator fitted into 
the mouth of a receiving bottle with the aid of a cork. The 
upper part of the percolator being closed and a small opening 
left in the cork to allow the escape of air from the receiving 
bottle. 
A continuous extraction apparatus can be made of this per¬ 
colator by enclosing the upper part in a suitable case and pass¬ 
ing cold water between, arranging the apparatus like a Liebig’s 
condenser. A glass tube is connected with the top of the perco¬ 
lator and the mouth of the bottle by rubber tube connections, 
