46 On the Compofition and Properties 
The third portion being boiled with lime water, very little 
more feemed to be diffolved than in pure water. 
The fourth portion being boiled with 4 grains of fubphof- 
phate of lime, or calcined bone, no more feemed to be dif- 
folved on account of this addition. 
Nor was more diffolved in the fifth portion, by the addition 
of 4 grains of phofphate of lime, made by dropping phof- 
phoric acid into lime water. 
And the refult was the fame with the fixth portion, to 
which were added 4 grains of fuperphofphate of lime, made 
‘by adding phofphoric acid to lime water, fo as juft to make 
a clear folution, and then evaporating the folution. 
g- Urine feemed to diffolve, or at leaft to fufpend, a greater 
quantity of the precipitate than mere water; fo likewife did 
water with a little fulphate of foda. 
_ ro. The precipitate did not render folution of hard foap 
atall curdy; but, on adding the precipitate to folution of 
fulphuret of potafh, it became very turbid. 
11. The precipitate produced a ftrong effervefcence, even 
in the cold, with nitric acid, but the fumes were not thofe of 
nitrous acid; there was a clear folution, which, on evapora- 
tion to drynefs, afforded black. matter, furrounded by 4 
pink, or blood-red margin. 
' 32, The fubftance, with fulphuric acid, turned: black, 
and emitted fumes copioufly, which were fearcely thofe of 
fulphureous acid; and, on evaporation, a black mark only 
was left. 
13. I firft digefted, and then boiled, in water, the precipi- 
tate with pruffiate of iron; but the filtrated liquor afforded 
no. precipitation with fulphate of iron. 
14. Two drachms, by meafure, of nitric avid, of the fpe- 
cific gravity of 1,35, were poured upon 7 grains of the preci- 
pitate: A violent effervefcence took place, which was foon 
fucceeded by a complete folution. 
A few drops of this folution, being evaporated on glafs, 
left 
