On the Coneine of Geiger. 
243 
fluid, on the addition of a small quantity of sulphuric acid and 
subsequent evaporation furnished an odorous salt. 
A second portion was treated in the same manner, but 
without ether. The product was volatile and alkaline; it 
formed white clouds on hydro-chloric acid being brought near 
it. When saturated with this acid and evaporated, it pro- 
duced an odorous saline mass of a red colour. This mass, 
when dissolved in water, treated with animal charcoal and 
evaporated, gave a colourless and inodorous salt. 
A third portion was treated in the same manner, but with 
potash. The distilled liquid was placed in a capsule, this 
capsule in a larger one containing weak hydrochloric acid, 
and the whole covered with a bell glass, and left at rest for a 
day at a temperature somewhat higher than that of the air. 
The fluid in the small capsule was somewhat alkaline, but lost 
this property on evaporation. That in the larger vessel gave 
a slightly coloured salt. 
Extract of conium without chlorophylline, alcoholic extract 
prepared in 1832 and 1833, the extract of Caventou, that of 
Starck of 1832, that of Parmentier prepared some years be- 
fore, extract of the seeds, the seeds themselves, and the dried 
plant, treated in the same manner, afforded the same results. 
Some drops of the solution of these hydrochlorates, when 
evaporated on a piece of glass, presented the beautiful arbo- 
rescent crystallization of hydrochlorate of ammonia, and all 
these salts on the addition of potash and at the ordinary tem- 
perature, disengaged ammonia, which was more or less pun- 
gent according to the colour of the salt. 
The acetous vapour which passed through the plant in the 
preparation of the extract of Caventou, when collected and 
evaporated at a moderate temperature, gave out alkaline 
fumes on the addition of potash. 
An acetous extract prepared by infusing the fresh plant in 
in water acidulated with strong vinegar, (de Mollerat) one 
drachm to the pound of plant, was preserved in a jar covered 
with paper. A year after its preparation, it was soft and 
odorous, its smell being analogous to that produced by the 
evaporation of the liquid obtained on the distillation of the 
