152 
dried without melting: the 
vapour of water and a keen 
aromatic smell were developed, 
which resembled greatly oil of 
rosemary mixed with a little 
of empyreuma, occasioned by 
an empyreumatic oil: there was 
no sublimate of crystalline mat- 
ter: at length we obtained a 
little thick empyreumatic oil : 
there remained a residue of 
carbonate of lime mixed with 
a little charcoal, 
8. Solubility of camphorate 
of lime in cold water, Twenty 
grains of this salt well dried were 
shaken for an hour and a half 
with 60 grains of water, at a 
temperature of 15° Reaumur ; 
13 grains were dissolved, for 
there remained seven grains of 
dry salt: thus five parts of cold 
water dissolve a little more 
than one part of salt, or 100 
parts retain 21 and two-thirds 
solution. 
On the Camphorte Acid, 
of aqueous vapours and a little 
very liquid oil, the empyreu- 
matic smell of which was very 
slight, but it had a strong taste 
of balsam of Peru. From the 
beginning, benzoic acid was 
sublimed, but this soon ceased: 
the residue was the same with 
that of camphorate of lime. 
The production of an empy- 
reumatic oil analogous to the 
balsam of Peru, and obtained 
from a benzoate of lime per- 
fectly pure aud crystallized, is 
certainly worthy the attention 
of chemists. 
8. Solubility of benzoate of 
lime in cold water. Fifty 
grains of this salt treated like 
the camphorate with 60 grains 
of water, were not dissolved, for 
there remained two grains in 
the filter: 100 parts of water, 
therefore, at a medium tempe- 
rature cannot dissolve more than 
five parts of this salt. 
The salts formed by these acids vary therefore considerably, 
and may still serve to elucidate the nature of these two acids : 
the case is the same with their combination with potash, as I 
sha!l now show. 
9. Properties of camphorate 
of potash. This salt does not 
crystallize until its solution has 
been brought to the consistence 
of a liquid syrup, and it is then 
spoita eously evaporated : we 
then obtain small crystals: these 
crystals meit in their water of 
crystallization, the liquor be- 
comes brownish, and requires a 
long time before the salt is hard- 
ened: it has then a pungent 
gud caustic taste, while the 
crystals 
9. Properties of benzoate of 
potash. The benzoate of pot- 
ash with a slight excess of acid 
crystallizes easily in small la- 
mine, or thin needles, which 
are not very soluble in water, 
since this salt requires 10 parts 
of water at the temperature of 
15° Reaumur. (The neutral 
combination of benzoate of pot- 
ash is much more soluble, since 
this salt attracts humidity from 
the air.) The acidulous ben- 
zoate 
