1162 Wisconsin Academy of Sciences, Arts, and Letters . 
Duesterbehn, F. 1898 
Rhizoma und Extractum Filicis in therapeutisoher, chem- 
ischer und toxicologischer Beziehung. 
Apoth.-Ztg., 13, pp. 713, 720, 729 and 734. 
The article is principally a review of the literature on the extract of 
male fern and its constituents. 
Lefils 1898 
Zur Herstellung von Filixextract. 
Pharm. Centralh., 39, p. 901. [Zeitschr. d. oest. Apoth. 
Ver., 37, p. 167; Pharm. Ztg., 43, p. 939.] 
The author advises the mixing of the powdered rhizomes with castor oil 
before preparing the extract as he is of the opinion that this procedure 
will retard the evaporation of the volatil oil and the precipitation of the 
crystalline filix acid. 
Idris, T. H. 1898 
Notes on Extract of Ginger. 
Am. Journ. Pharm., 70, p. 466. 
The alcoholic extract of ginger known as gingerine does not contain all 
of the aromatic principles of the rhizome, as most of the essential oil is 
lost on removing the alcohol upon evaporation. Acetone boiling at 58°C 
was found to be the most suitable solvent for extracting ginger. The 
acetone extract is a dark brown substance of treacly consistence, intensely 
pungent and at the same time possessing the full aroma of ginger, the 
quality of which largely depends on the variety of ginger used. 
Miehle, Feodor 1898 
Eine empfehlenswerte Form der Verordung von Extractum 
Filicis. 
Apoth.-Ztg., 13, 777. [Pharm. Centralh., 39, p. 873.] 
The author recommends diluting the extract with castor oil in order to 
make a standard preparation containing a definite amount of filix acid. 
He advises the introduction of such a preparation into the D. A. IV, 
under the name Extractum Filicis oleatum . 
Plzak, F. 1898 
Extractum Filicis. 
Pharm. Centralh., 39, p. 687. [Jahresb. d. Pharm., 33, 
p. 547.] 
The author found 6.48 per cent of filix acid in the extract of male fern 
by the Kraft method, 6.0 per cent, by Fromme’s old method and 5.2 per cent, 
by Fromme’s improved method. 
