218 
SELECTED ARTICLES. 
notable precipitate. A solution of 1 was very sensibly 
30.000 J J 
disturbed. Appearances of reaction did not cease except 
when the solution was 1 , acidified by 50 per cent, of 
120.000 J r 
hydrochloric acid. The solution of _L_ was not troubled by 
30.000 J 
the sulphuretted hydrogen when acidified by a much greater 
quantity of the hydrochloric acid. 
J. (TErdman and Jinnales des Mines, 
ART. XXXI. — NEW RESEARCHES UPON THE COMPOSI- 
TION OF THE ORGANIC ALKALIES. By M. V. Regnault. 
The organic alkalies have been examined by many distin- 
guished chemists, and their composition has been principally 
studied, in latter times, by M. Pelletier, Dumas, and Liebig, 
M. Liebig, has arrived at this extraordinary result, that all 
the organic bases, contain, in each atom of base, two atoms of 
nitrogen, and that their capacity of saturation is consequently 
the same as if the nitrogen existed in the state of ammonia 
in combination with a body which does not alter in any re- 
spect its combining power. This law which regulates the 
composition of vegetable bases, has been established by a great 
number of analyses, and is generally admitted by all chemists. 
Nevertheless, if we examine, with attention, the series of 
salts which these bases form with acids, we will soon perceive 
very singular anomalies. Thus, for example, the sulphates of 
quinia and cinchonia, obtained by saturating these bases with 
dilute sulphuric acid, will be subsalts, as well as the salts ob- 
tained by dissolving them in chloric and iodic acid. The 
hydriodates of strychnia and brucia, obtained by dissolving 
these bases in an excess of hydriodic acid, or prepared by 
double decomposition will be, according to the analyses of M. 
Pelletier, sesquibasic salts. The hydrochlorates of cinchonia 
and quinia, obtained by dissolving these bases in an excess of 
hydrochloric acid and crystallising, will be bibasic salts. 
