164 Treatise on 
of urinous Spirit; and three Ounces and twelve 
Grains of foetid, bitter, acrid Oil. 
The black Mafs left in the Retort, which was 
like a Coal, and quite void of Tafte, weighed ten 
Ounces, four Drachms and a Half; and being cal- 
cined in a reverberatory Fire eight Hours, there re- 
mained only four Ounces, two Drachms and a Half. 
From thefe, by Lixiviation, were got three Drachms 
and fixty Grains of cauftick Salt, purely alkaline, 
which in the Solution of corrofive Sublimate pre- 
cipitated a Powder of a deep Saffron Colour. The 
Lois of Parts in Diftillation was about twelve 
Ounces and one Drachm ; and in Calcination fix 
Ounces and two Drachms. 
The Principles afforded in this Analyfis, when 
they are mixed together, conflitute a refino-gum- 
mous Compound ; that is, the alkaline Salt, which 
abounds in Colocynth, is joined with fome Porti- 
on of acrid Oil into the Confiflence of a Gum, 
whilft another middling Portion of Oil, with a 
iittle acid Salt, forms a Refin ; and from thefe, 
condenfated with Earth, arifes an acrid refino-gum- 
mous Compound, which Mon. Boulduc confirms by 
feveral Experiments, related in the Memoirs of the 
Royal Academy of Sciences for the Year 1701. 
From eight Ounces of the Pulp of Colocynth, 
cleared of the Seeds, he obtained near three Ounces 
of a gummous Extract; and from the fameWeight, 
half an Ounce of a refinous Extra# with Spirit of 
Wine. In the next Place, he macerated fome of 
the Pulp a long Time in hot Water, whereby its 
gummous Subftance was feparated, but could draw 
ho Tin#ure from it afterwards ; whereas, after he 
had macerated fome Pulp in Spirit of Wine, and 
fo taken out its refinous Parts, he got by the Means 
of Water two Ounces of a gummous Extra#. A 
Deco#ion of the Pulp, in Diftillation, yielded a 
clear 
