916 Wisconsin Academy of Sciences , Arts, and Letters. 
early workers attempted to employ it in the extraction of other 
plant drugs, and it was not until 1834, when Beral again called 
attention to the use of ether as a solvent in his preparation of 
Piperoide du Gingembre, our present oleoresin of ginger, that 
its value in the extraction of oleoresinous drugs appears to have 
been recognized. From then on, however, its use seems to have 
widened rapidly as the French Pharmacopoeia of 1839 contained 
no less than nineteen ethereal tinctures. The increase in the 
number of oleoresins was not as rapid as might be expected in 
view of the statement concerning the ethereal tinctures. Only 
two other members of this class of preparations made their ap- 
appearance before 1850, namely, the Extraction Cubebarum 
aetkereum and the Extractum Seminis Cinae aethereum. 
Some idea of the rate at which the Extracta aetherae, our pres¬ 
ent oleoresins, came into existence and were given official recog¬ 
nition will become evident from the following: 
In the Prussian Pharmacopoeia of 1829, but one such prepara¬ 
tion was official, namely, 
Extractum Filicis aethereum. 
The Baden Pharmacopoeia of 1841 contained three prepara¬ 
tions of this class, viz: 
1. ) Extractum Badicis Filicis Maris aethereum. 
2. ) Extractum Cubebarum aethereum. 
3. ) Extractum Seminis Cinae aethereum. 
The Danish Pharmacopoeia of 1850 contained two prepara¬ 
tions of this class, viz: 
1. ) Extractum Cubebarum aethereum. 
2. ) Extractum Filicis Maris aethereum. 
The third edition of the United States Pharmacopoeia, which 
appeared in 1851, included two fluid extracts prepared with 
ether as a menstrum, viz: 
1. ) Extractum Cubebae fluidum. 
2. ) Extractum Piperis fluidum. 
