CHLORINE AND ORGANIC ALKALIES. 
165 
strychnia is always in solution in acid liquors, or those ren- 
dered such,) when a white cloud appears on the passing of 
the bubble, and spreads through the liquid. Among organic 
substances, I am acquainted with only albumen and gelatin 
which produce like phenomena; but the precipitate formed 
from strychnia is soluble in alcohol and ether, while the pre- 
cipitates formed by chlorine in a solution of albumen or gelatin 
are insoluble in alcohol and ether. If strychnia is precipitated 
by chlorine from a liquid containing albumen or gelatin, we 
may separate these precipitates by means of alcohol. 
The action of Chlorine upon Brucia. 
As a first experiment, I passed a current of pure chlorine 
gas through a neutral solution of hydrochlorate of brucia. In 
acting at first on a soluble salt of brucia, I had in view to 
ascertain whether analogous phenomena to those observed in 
treating a salt of strychnia would be manifested, and whether 
there would be a formation of insoluble matter immediately 
on the passage of the first bubbles of the gas, a fact which I 
could not so well ascertain by using brucia in powder, simply 
suspended in distilled water. The liquid did not become 
cloudy, but from being without color, it became first yellow, 
then orange, afterwards a clear red, and finally blood-red. 
From this point the color diminished, passing through the 
same tints. At the point where it had become only yellow, 
flocculi were formed in the liquor and continued to be pro- 
duced for three days, the operation being carried on during 
that time. After this interval, the filtered liquid gave but 
slight flocculi by chlorine, it had become very acid. 
In a second operation, pure chlorine gas was passed through 
distilled water, holding powdered brucia in suspension, and the 
brucia was dissolved. As long as any brucia remained un- 
dissolved, the liquid exhibited no acidity, although hydro- 
chloric acid was formed; for as soon as the acid was produced 
at the expense of one portion of the brucia, it was neutralized 
by the free brucia. At the moment when all the brucia was 
