Du Mez—The Galenical Oleoresins. 
1161 
- 1898 
Extraction Filicis aetherum. 
Gehe & Co., Handels-Ber., 1898, p. 68. [Pharm. Centralh., 
39, p. 298.] 
In the analyses of 11 extracts obtained during different years, 6 were 
found to contain aspidin, 0.2 to 3.0 per cent., but no filix acid; 4 samples 
contained filix acid but no aspidin; 1 sample showed a trace of aspidin 
and a small quantity of filix acid. 
- 1898 
Zur Arzneiform und Werthbestimmung des Filixextracts. 
Pharm. Centralh., 39, p. 873. 
The dilution of the extract of male fern with castor oil to a definite 
filix acid content is discussed. 
- 1898 
Extractum Filicis, Ph. G. III. 
Caesar and Loretz, Geschaefts-Ber., Sept. 1898, p. 72. 
A continuation of the firm’s investigations concerning the influence of 
time of harvesting upon the quality of the male fern rhizomes has shown 
that they do not contain the maximum amount of active constituents until 
the month of August. They, therefore, conclude that the rhizomes should 
only be harvested in the months of August, September and October. 
It is further reported that analyses of the extracts recently prepared 
show that the present year’s (1898) crop of rhizomes is, on the whole, lower 
in crude filicin content than that of the preceding year (1897.) 
Beliingrodt, Fr. 1898 
Ueber Rhizoma und Extractum Filicis. 
Apoth.-Ztg., 13, p. 869. 
The crude, and purified filicin content of 8 different extracts of male 
fern prepared by the author from rhizomes obtained from different sources 
are given. Similar data in the examination of 9 commercial extracts are 
also reported. 
Dieterieh, K. 1898 
Zur Wertbestimmung und Arzneiform des Filixextraktes. 
Apoth.-Ztg., 13, p. 788. 
The addition of castor oil to the extract of male fern in sufficient quantity 
to bring the filix acid content to a definite standard is recommended. 
