44 
ON QUINOIDINE. 
There can be no doubt, however that quinoidine may 
be made and sold as heretofore, without any reference to 
the patent • and it will be a question for the profession to 
consider, whether they will purchase it under its old and 
well-known appellation, and at its fair market value, or 
whether they prefer paying for the privilege of using it 
under a new, assumed, but false title. — Ibid. 
Note. — In our October number, an article on Amorphous Quinia 
appeared from the pen of Baron Liebig, which exposed the fact that a 
large portion of the Quinoidine or precipitated extract of Bark of 
European commerce, was composed of the alkaloid Quinia in a pecu- 
liar condition isomeric with ordinary quinia, and capable of forming 
salts, — and is in fact the active agent in the black extract-like substance 
officinal in our Pharmacopceia of 1830, under the name of " Impure 
Sulphate of Quinia." Quinoidine is the matter precipitated when car- 
bonate of potassa is added to the mother liquor that yields " impure 
sulphate of quinia" by evaporation. The London pharmaceutists and 
chemists have been thrown into a ferment, by the announcement that 
a patent had been granted to J. Lloyd Bullock, for the exclusive pre- 
paration of "Amorphous Quinia" on behalf of a foreigner; — and as 
this announcement was not made until after the publication of Liebig's 
paper, and the general currency of the facts contained in it, when the 
manufacturers of sulphate of quinia had prepared themselves to furnish 
the article, these gentlemen think themselves illy used. Liebig's 
name is not used in the patent, but the editor of the Pharmaceutical 
Journal and others suppose that he is the " foreigner abroad" for whom 
the patent was obtained, which has called forth some severe animad- 
versions. From the above paper by "Mr. Redwood, the so-called 
amorphous quinia is little more than the quinoidine of commerce, and 
if so the patent can hardly stand. An extract from the patent follows. 
W. P. Jr. 
