1154 Wisconsin Academy of Sciences, Arts, and Letters. 
Weppen and Lueders 1892 
Ueber Extractum Filicis. 
Apoth. -Ztg., 7, p. 514. [Pharm. Ztg., 38, 922; Pharm. 
Post, 25, p. 1173.] 
It is stated that the extract prepared according to the D. A. Ill should 
have a yellowish-green color but not a deep green color. Preparations 
having a deep green color probably have chlorophyll or copper salts added 
to them. Copper can best be detected by dissolving the ash in hydro¬ 
chloric acid and making the usual tests for the metal. 
Two samples (commercial) of a deep green color were found to contain 
0.056 and 0.044 per cent, of copper, respectively. 
- 1893 
Extractum Filicis aethereum. 
Gehe & Co., Handels-Ber., Apr., 1893, p. 43. 
The condition of the season in which the rhizomes are harvested is 
stated to have a marked effect on the color of the extract. Sometimes 
the genuine extract is very dark green in color, especially in dry seasons. 
Beckurts and Peters. 1893 
Extractum Filicis. 
Apoth.-Ztg., 8, p. 549. 
Upon examination, two beautiful green samples of the commercial ex¬ 
tract were found to contain 0.135 and 0.044 per cent, of copper, respectively, 
evidently added for the purpose of coloring the product. An extract pre¬ 
pared by the author was yellowish green in color and contained no copper. 
A warning is issued against the use of copper utensils in the preparation 
of the extract. 
Dieterich 1893 
Extracta spissa et sicca. 
Helfenberger Ann., 1893, p. 38. 
One sample of extract of cubeb showed a “moisture” content of 32.7 
per cent, and gave 0.50 per cent of ash (p. 39). 
Three samples of extract of male fern contained 1.15, 1.60 and 1.75 per 
cent, of “moisture” and gave 0.50, 0.50 and 0.50 per cent, of ash, 
respectively (p. 39). 
Dyer and Gibbard 1893 
Determination between Genuine and Exhausted Ginger. 
Analyst, 18, p. 197. [Proc. A. Ph. A., 42, p. 936.] 
The ether extract of genuine ginger is stated to be 3.0 to 5.2 per cent. 
After exhausting with ether, alcohol was found to yield 0.8 to 1.5 per cent, 
additional extractive matter. 
