Foreign Vegetables. 231 
In a chymical Analyfis , two Pounds and eleven 
Ounces of Venice Turpentine diftilled in B. V. yield- 
ed one Drachm and an half of fubacid Phlegm ; 
and ten Ounces, fix Drachms and an half of fubtile 
clear Oil. The Refi&uum being put into a Retort, 
and diftilled with a reverberatory Fire, which was 
gradually increafed, gave up two Ounces and two 
Drachms of acid Phlegm : A little urinous Phlegm ; 
with twelve Ounces, two Drachms and fifty four 
Grains of yellowifh Oil fomething thicker than the 
former, and at laft feventeen Ounces and four 
Drachms of Oil which was ftill thicker and reddifti. 
The Mafs remaining behind in the Retort was 
black, fhining, fmooth and fpongy, and weighed 
fix Drachms and twelve Grains. This being cal- 
cined in a Crucible for eight Hours, acquired a 
reddifh brown Colour, weighed only twenty two 
Grains, was entirely void of Tafte, and yielded no 
Salt by Lixiviation. The Lofs of Parts in Diftil- 
lation was about one Drachm, and in Calcination 
almoft fix Drachms. Hence it appears that this 
Turpentine chiefly confifts of fubtile Oil and acid 
Salt, which are combined together fo as to confti- 
tute a refinous Compound ; and that the Proportion 
of Earth and alkaline Salt contained in it are ex- 
ceeding fmalk In fhort, if the Spirit of Turpen- 
tine, and the acid Spirit of Vitriol, be digefted to- 
gether for fome Days, they change into a Refin, 
like Turpentine *, and this by a longer Digeftion 
grows thicker and thicker, tili at length ft is con- 
verted into a black Bitumen . 
We muft obferve that Turpentine gives a violet 
Smell to the Urine, not only when it is taken in- 
wardly, or inje&ed by way of Clyfter, but alfo 
when it is applied externally, or only received by 
the Breath into the Lungs. Hence we may con- 
clude, that its Efficacy is principally owing to fpi- 
Q^4 rituous 
