116 -Balt of Lead, potfonouu 
of the primary ones, and others from them 
again to a great Number of Gradations, 
forming thereby a very pretty Figure, the 
Reprefentation of which is given at D. 
Give me Leave now to obferve, that ra* 
dialed Figures of Spar much refembling 
thefe, and which probably owe their Form 
to the fame Principles, are fometimes found 
in Lead-Mines, of which I have at this 
Time a Specimen before me. 
Not with handing it may feem wandering 
from my Purpofe, I ibould think myfelf 
greatly wanting in my Duty towards Man¬ 
kind, if I clofed this Chapter without warn¬ 
ing them of the Mifchiefs that may arife 
from taking this or any other Preparation 
of Lead internally, as the poifonous Quali¬ 
ties of that Metal are not to be fubdued ot 
cured, and thofe who have much to do with 
it feldom fail fadly to experience its bad Ef¬ 
fects. I am fenfibie this Salt has frequent¬ 
ly been prefer! bed in Quin lies. Inflamma¬ 
tions, and other Diforders where great 
Cooling has been judged necefTary : But 
Dr. Boe'rhaave declares he never knew it 
given with Suceefs, nor derfb himfelf ever 
preferibe it internally, from his Knowledge 
that there is fcarce a more deceitful and de« 
fkudive Poifon than this, which returns to 
Cerufe as foon as the Acid is abforbed there¬ 
from by any thing it may meet with : and 
that it proves afterwards a moil dangerous, 
- - ’ 6 and 
