1152 Wisconsin Academy of Sciences, Arts, and Letters. 
Poulsson, E. 1891 
Ueber den giftigen und bandwurmtreibenden Bestand- 
theil des aetherischen Filixextractes. 
Arch. f. exper. Path. u. Pharm., 29, p. 1. 
Filix acid is stated to occur in two forms, amorphous and crystalline. 
The first is reported to be therapeutically active, the latter is not. The 
crystalline acid is thought to be an anhydride or lactone of the amorphous 
acid. The author gives the name Filicin to the crystalline acid. 
Rayman 1891 
Wirkung des Extractnm Filicis aetherenm. 
Pharm. Post, 24, p. 933. 
It is stated that the extract of male fern is not well borne when taken 
internally if the ether has not been completely removed. 
Reuter, Ludwig 1891 
Ueber die Beziehungen des Filixsaeuregehaltes zur Wirk¬ 
ung des Extractum Filicis aethereum. 
Pharm. Ztg., 36, p. 245. [Pharm. Post, 24, p. 511; Am. 
Journ. Pharm., 63, p. 288.] 
It is stated that, in 14 out of 15 cases, prompt action was obtained using 
an extract which showed no deposit of filix acid and which left no residue 
of filix acid after treating with petroleum ether. On the other hand 
extracts which were rich in a deposit of filix acid also showed prompt action. 
Professor Kobert is cited as stating that the Russian extract is about 
ten times as active as the German extract and twenty times as active 
as the French extract. 
Riegel, S. J. 1891 
Ginger and its Oleoresin. 
Am. Journ. Pharm., 63, p. 531. [Year-Book of Pharm., 29, 
p. 168.] 
Unbleached Jamaica ginger and East Indian ginger (having epidermis 
removed) yielded 5 and 8 per cent., respectively, of oleoresin to alcohol. 
The unbleached Jamaica ginger gave 2.5 per cent, of extractive matter 
to benzin and the East Indian ginger gave 8 per cent of oleoresin to ether. 
All of the foregoing oleoresins were found to be completely soluble in 
alcohol and chloroform. 
-- 1892 
Extractum Alcannae aethereum. 
Gehe & Co., Handels-Ber. Apr. 1892, p. 46. 
The ether extract of alkanet root is stated to be completely soluble in 
oil which is said not to be true of all commercial alkanet extracts. 
