maintains, that iilex might be made to
afford allum with acid of vitriol after
it has been dhfolyeddn liquor filicum
with fal fodæ. But when the fufions
are made in veffels whifrii contain no
argillaceous earth,, no allum can be
obtained with acid of vitriol, which
however may be obtained when the
vegetable alkali is kept fluid during a
confiderable time in a common crucible,
becaufe the alkali diffolves fome
part o f the veifel itfelf. Pure filiceous
earth is intirely indiflbluble by itfelf
in acid o f vitriol, let it be treated in
any manner whatfoever.
Let this account o f thefe dreadful
devaftatlons be fuflicient.
Homo naturæ niinifter & Interpres,
tantum facit 6c intelligit, quantum de
naturæordine, revel mente qbfervave-
rit;, nec amplius fcit aut poteft. Baco^
P I N ! S.
