ON AMORPHOUS QUININE. 
181 
magnesia, as a gelatinous hydrate, thrown down from epsom 
salts by caustic soda or potassa, and well washed, is employ- 
ed, the poisonous acid is removed from the solution in a com- 
paratively short time; but not near so quickly as by hydrated 
sesquioxide of iron — which I believe to be a more eligible 
antidote, and quite as quickly prepared, being more easily 
washed than the magnesia. 
It would be inferred, a priori, as the arsenite of magnesia 
is an insoluble salt, that sulphate of magnesia would be a 
perfect antidote for arsenite of potassa, but on adding a so- 
lution of epsom salts to Fowler's arsenical solution the mix- 
ture remains transparent! 
The importance of M. Bussy's conclusions to toxicolo- 
gical knowledge, deserve a more extended examination 
than I have been able at this time to give them.— W. P., jr. 
9 
ART. XXXV.— ON AMORPHOUS QUININE AS IT EXISTS IN 
THE SUBSTANCE KNOWN IN COMMERCE AS QUINOI- 
DINE. 
By Baron Liebig. 
The following excellent paper appeared in The Lancet 
of the 23d May : — 
In the preparation of sulphate of quinine, after all the 
crystals which can be obtained are separated, a dark- 
coloured mother-liquor remains, having an extremely bitter 
taste. On the addition of an alkaline carbonate, this liquid 
loses its colour and bitter taste, depositing at the same time, 
a yellowish-white, or brownish precipitate, which, after 
