Ci3) 
place^ he wUl be neceflitated to acknow¬ 
ledge all others to be produced by the 
fame power. So that I have found the 
matter reduced to this, that we were to 
examine E'very Solid naturally included in 
a Solids viz. Whether it was produced 
in the fame place where it is found, that 
is, we were to confider the nature both 
of the place where it is found, and of the 
place where it is produced. But no Man 
will eafily determine the Place of Pro¬ 
duction, who knows x\ot iht Manner of 
the Production % and all difeourfing of 
the manner of Produdion will be to no 
purpofe, if a certain knowledge be not 
had of the Nature of Matter. Whence 
it appears, how many Queftions are to 
be refolved only to fatisfie one. 
The other Caufe,feeding doubtSjfecms 
to be thisThat in the Examination of 
Natural thingSjthofe that cannot be cer¬ 
tainly determin’d, are not diftinguiflit 
from fuch, as may be fo 5 Whence arife 
two principal forts of Philofophers: 
Some are fcrupulous to alfent even to 
Demonftrations themfelves, apprehend¬ 
ing leaft in them alfb there fhould lurk 
the like errour, as they have frequently 
difeover’d 
