974 Wisconsin Academy of Sciences , Arts, and Letters. 
1880 
Oleoresina Aspidii 
Oleoresin of Aspidium 
[Oleoresina Filieis, Pharm., 1870] 
Aspidium, 1 in No. 60 powder, 3 one 
hundred parts .100. 
Stronger Ether, 4 a sufficient quantity. 
Put the aspidium into a cylindrical 
glass percolator, provided with a 
cover and receptacle suitable for vola¬ 
tile liquids, 6 press it firmly, and 
gradually pour stronger ether upon it, 
until one hundred and fifty (150) 
parts of liquid have slowly passed. 6 
Recover 7 the greater part of the 
ether by distillation on a water-bath, 
and expose the residue, in a capsule, 
until the remaining ether has evap¬ 
orated. 8 
Keep the oleoresin in a well stopped 
bottle 9 . 
Note. Oleoresin of aspidium us¬ 
ually deposits, on standing, a granu¬ 
lar crystalline substance. 10 This should 
be thoroughly mixed with the liquid 
portion, before use. 11 
1890 
Oleoresina Aspidii 
Oleoresin of Aspidium 
Aspidium, 1 recently 2 reduced to No. 60 
powder, 3 five hundred grams 
. 500 Gm. 
Ether 4 a sufficient quantity. 
Put the aspidium into a cylindrical 
glass percolator, provided with a stop¬ 
cock, and arranged with cover and 
receptacle suitable for volatile liquids. 6 
Press the drug firmly, and percolate 
slowly with ether, added in succes¬ 
sive portions, until the drug is ex¬ 
hausted. 6 Recover the greater part 
of the ether from the percolate 
by distillation on a water-bath, and, 
having transferred the residue to a 
capsule, allow the remaining ether to 
evaporate spontaneously. 8 
Keep the oleoresin in a well-stop¬ 
pered bottle. 9 
NOTE. Oleoresin of Aspidium 
usually deposits, on standing, a gran¬ 
ular-crystalline substance. 10 This 
should be thoroughly mixed with the 
liquid portion before use. 11 
