1firſt we thought might be ſome ſtain up
on the Glaſs; but after, finding it to
be in divers Qualities like the Oyl,
and Salt of the Concrete we were Di
ſtilling, we began to ſuſpect that the
moſt ſubtle and fugitive parts of the im
petuouſly aſcending Steams, had pene
trated the ſubſtance (as they ſpeak) of
the Glaſs, and by the cold of the am
bient Air were condenſ'd on the ſur
face of it. And though we were ve
ry backward to credit this ſuſpition, and
therefore call'd in an Ingenious Perſon
or two, both to aſſiſt us in the Ob
ſervation, and have Witneſs of its e
vent, we continued a while longer to
watch the eſcape of ſuch unctuous Fumes,
and upon the whole matter unanimouſly
concluded, That all things conſider'd,
the ſubtle parts of the diſtill'd matter
being violently agitated, by the exceſ
ſive heat had paſſ'd through the Pores
of the Glaſs, widen'd by the ſame heat.
But this having never happen'd but
once in any of the Diſtillations we have
either made or ſeen, though theſe be
not a few, it is much more reaſonable
to ſuppoſe, that the perviouſneſs of
our Receiver to a Body much more
on the Glaſs; but after, finding it to
be in divers Qualities like the Oyl,
and Salt of the Concrete we were Di
ſtilling, we began to ſuſpect that the
moſt ſubtle and fugitive parts of the im
petuouſly aſcending Steams, had pene
trated the ſubſtance (as they ſpeak) of
the Glaſs, and by the cold of the am
bient Air were condenſ'd on the ſur
face of it. And though we were ve
ry backward to credit this ſuſpition, and
therefore call'd in an Ingenious Perſon
or two, both to aſſiſt us in the Ob
ſervation, and have Witneſs of its e
vent, we continued a while longer to
watch the eſcape of ſuch unctuous Fumes,
and upon the whole matter unanimouſly
concluded, That all things conſider'd,
the ſubtle parts of the diſtill'd matter
being violently agitated, by the exceſ
ſive heat had paſſ'd through the Pores
of the Glaſs, widen'd by the ſame heat.
But this having never happen'd but
once in any of the Diſtillations we have
either made or ſeen, though theſe be
not a few, it is much more reaſonable
to ſuppoſe, that the perviouſneſs of
our Receiver to a Body much more