Du Mez—The Galenical Oleoresins. 
1159 
— ____ 1897 
Extractum Filicis, Ph. G. III. 
Caesar and Loretz, Geschaefts-Ber., Sept. 1897, p. 62. 
[Pharm. Centralh., 38, p. 34.] 
Investigations carried on by the firm showed that the best time for 
harvesting the rhizomes of male fern is from the middle of September 
to the end of October. Ehizomes collected in the spring yielded an ex¬ 
tract low in filix acid content. 
The consistence of the abstract is said to be dependent upon variations 
in the rhizomes, thus rhizomes rich in wax give an extract which is not 
fluid at ordinary temperatures. 
Fromme’s improved method for estimating the filix acid is given. 
— -- 1897 
Extractum Filicis aethereum, P G.. III. 
Gehe & Co., Handels-Ber., Apr. 1897, p. 60. 
The results obtained in the assay of male fern extracts by the methods 
of Daccomo and Seoccianti, Bocchi, and Fromme are tabulated. 
Boehm, R. 1897 
Beitraege zur Kenntniss der Filixsaeuregruppe. 
Archiv. f. exp. Path. u. Pharm., 38, p. 35. 
In addition to the volatile oil, fixed oil and filix acid, Boehm isolated 
four acid substances from the extract of male fern, viz*, aspidm (C 23 H 32 0 7 ), 
flavaspidic acid (C 23 H 28 0 8 ), albaspidin (C 22 H 28 0 7 ) and aspidinol (C 12 H 16 0 4 ). 
Candussio 1897 
Ueber die Bereitung des Extractum Filicis aethereum. 
Pharm. Post, 30, p. 7. 
The author is impressed with the low cost of the commercial extract of 
male fern as compared with the cost when prepared by the apothecary him¬ 
self. The examination of a number of samples from the best German 
houses showed a low filix acid content when estimated according to the 
method of Daccomo and Seoccianti. They were all of a beautiful green 
color, however. 
Dieterich 1897 
Extracta spissa et sicca. 
Helfenberger Ann., 1897, p. 244. [Apoth.-Ztg., 13, p. 788; 
Pharm. Centralh., 39, p. 775.] 
Two samples of extract of male fern, D. A. Ill, lost 4.5 and 4.72 per 
cent., respectively, on drying at 100°C; and gave 0.43 and 0.52 per cent, 
of ash, respectively. 
Dieterich contends that a standard, which does not take into consideration 
