Du Mez — T1te Galenical Oleoresins. 
1165 
Dieterich 1901 
Extracta spissa et sicca. 
Helfenberger Ann., 1901, p. 170. 
One sample of extract of male fern, D. A. IV, gave 5.23 per cent, of 
“moisture” and 0.32 per cent, of ash (p. 171). 
Matzdorff, M. 1901 
Wertbestimmung des Rhizoma Filicis. 
Apoth.-Ztg., 16, pp. 233, 256 and 273. 
The various constituents of the extract of male fern are discussed with 
respect to their therapeutic activity. Of these filix acid is thought to 
be the most important. Tables showing the crude filicin and filix acid 
content of ethereal fluid extracts prepared by ordinary percolation and 
by extraction with a Soxhlet’s apparatus are given. 
Stoeder 1901 
Bestimmnng der Filixsaenre in Extractum Filicis. 
Pharm. Ztg., 46, p. 541. 
A method very similar in all respects to that of Fromme for the esti¬ 
mation of the filix acid in the extract of male fern is described. 
--- 1902 
Oleoresin of Insect Powder. 
Southall Bros. & Barclay, Lab., Rep., 10, p. 20. 
This oleoresin is said to be extracted from the powdered drug and is 
offered for sale, in the crude form, as an extract, or precipitated, in the 
form of a coarse powder. 
It is said to be useful as a basis for nursery hair lotions, dusting pow¬ 
ders and similar articles. 
-- 1902 
Extractum Filicis. 
Caesar and Loretz, Geschaefts-Ber., Sept. 1902, p. 73. 
It is stated that the crude filicin contains the amorphous acid recently 
shown by Kraft to be the active principle of male fern extract. The 
estimation of the crude filicin will, therefore, be continued by the firm. 
Buttin, L. 1902 
Extract de Fougere male. 
Schweiz. Wochenschr. f. Chem. u. Pharm., 40, p. 234. 
A short review of the early work on the constituents of the extract of 
male fern is given. 
The variation in the constituents of the rhizomes due to the locality in 
