Du Mez—The Galenical Oleoresins. 
1135 
Table 140 — Piperine content of commercial samples. 
Sample 
No. 
Date 
Observer 
Source 
Piperine 
content 
1. 
1916 
DuMez... 
Sharp & Dohme. 
Per cent. 
27.3 
33.8 
2. 
Squibb & Sons. 
The laboratory samples were prepared and tested during 
the warm months of summer, which accounts for the high 
piperine content. A very considerable amount of the latter 
precipitated out during the colder months which followed. It 
is, therefore, thought that the results obtained in the case of 
the commercial products are the more typical. 
Adulterations. 
Copper was found to be present in all of the commercial 
samples examined. See under “Ash content.” 
Bibliography. 
Planche 1823 
Von den pharmaceutischen Zubereitungen des Lupulins. 
Mag. f. Pharm., 1, p. 183. [Trommsdorff’s n. Journ. d. 
Pharm., 7, p. 345.] 
A method for preparing the alcoholic tincture of lupulin is given. It is 
further stated that an extract similar in all respects to the resin said to 
have been isolated by Ives results when the alcohol is removed from the 
tincture by evaporation. 
Geiger, Ph. L. 1824 
Versuche liber die chemisehe Zusammensetzung der Wurzel 
des maennlichen Farrenkrauts, Polypodium (Aspidium , Neplt- 
rodium) Filix Mas. 
Mag. f. Pharm., 7, p. 38. 
The article is a review of Morin's analysis of the rhizome of male fern 
with a note pointing out that Morin was not the first investigator to make 
such an analysis, but that Gebhardt had already published an analysis of 
the same in 1821 in an inaugural dissertation delivered at Kiel. Gebhardt 
is stated to have used ether for extracting the “oil." 
