Du Mez—The Galenical Oleoresins. 
943 
The above form of percolator was mentioned by Procter 
(1849) in his article entitled The Preparation of the Oleoresin- 
ous Ethereal Extracts. 
-1873 
Utensilien zur Bereitung der aetherischen nnd weingeistig- 
aetherischen Extracte. 
Hager’s Commentar zur Pharmakopcea Germanica, 1 , p. 620. 
This consists of a cylinder bb fitted into a cork / which is in¬ 
serted into the neck of a flask or bottle g, aa is a cover which 
serves as a condenser. In the lower end of the cylinder bb is 
a tin sieve plate ss in the center of which is a tin tube rr en¬ 
closed in a glass tube vv. The glass tube is held firmly in place 
by a cork at each end pp. The condenser aa has a conical 
shaped bottom N around the interior of which run two cor¬ 
rugated rings zz of tin. The space a , Fig. B, contains cold 
water which enters from the openings cc and flows out through 
