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Selected Articles. 
useful in these cases, and the following experiments have 
proved the truth of this opinion : 
1. I took one and a half to two grains of well crystal- 
lized morphine, strychnine and brucine, each of these salts 
were dissolved in half an ounce of water, with the addition of 
one drop of a very much diluted acid, tannin was added to the 
solution; the abundant, white cheese-like precipitate, was col- 
lected on a linen cloth, washed and mixed with a small quan- 
tity of slacked lime, the mixture dried on a water bath, re- 
duced to powder, and treated with boiling alcohol at 36°. 
The evaporation of the menstruum was carried on in a watch 
glass, and always afforded me the vegetable alkali in a crys- 
tallized state, or susceptible of forming the most beautiful 
crystals on the addition of an acid : thus with the morphine I 
formed a silky plumose hydrochlorate, with the strychnine a 
white, acicular acetate ; and with the brucine a prismatic and 
acicular sulphate. 
2. I added the above salts in the same quantities to soup, 
wine, coffee, sugar, flour, &c, and operated as above on the 
liquids ; in the case of the flour I removed the alkaloid by 
means of cold water, acidulated with a few drops of very 
weak sulphuric acid ; then filtered and added the tannin. 
In all cases I isolated the alkaloids which were dissolved in 
weak acids, to get rid of the fatty and colouring matters of 
the soup, wine, &c. The acid solutions were carefully con- 
centrated on watch glasses, and afforded me the organic salts 
in well characterized crystals. 
3. Finally, I made mixtures of soup, wine, &c, with two 
drachms of laudanum on the one part, and with a decoction 
of half an ounce of powdered nux vomica on the other. The 
mixtures being rendered almost neutral, were subjected to the 
same mode of treatment, and afforded me very distinct crys- 
tallizations of the alkaloids. 
To conclude, these experiments which I repeated several 
times, and which only require a little care in their perform- 
ance, always succeeded with me; and I do not hesitate to 
publish them as susceptible of useful applications; I moreover 
think, that after the ingestion into the stomach of the poison- 
