950 Wisconsin Academy of Sciences , Arts , and Letters. 
Alpers, William C. 1896 
Oleoresinae. 
Merck’s Rep., 5, p. 593. [Proc. Am. Pharm. Assoc., 45, p. 435.] 
The apparatus consists of a cylindrical percolator a. The 
upper end of the percolator is closed with a large cork b through 
which two holes have been bored—the one for receiving a bent 
glass tube c, the other for a small glass funnel d. The lower 
narrow end of the percolator is closed by a cork e through which 
a straight connecting glass cock / passes into another perforated 
cork g that closes the receiving bottle Ji. This cork contains 
a second perforation with a small bent glass tube i. The glass 
tubes c and i are joined by means of a small piece of rubber 
tubing at k. 
Coblentz’s Handbook of Pharmacy, p. 290. 
1902 
A is a percolator with a stop cock C. It is inserted into a 
receiver B. The receiver B and percolator A are connected 
