| Boyle, Robert New experiments physico-mechanicall, touching the spring of the air and its effects 1660 |
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of that colour to be most easily kindled)
& carefully closing the Vessel we brought
it to a Window at which the Sun, not very
faire from the Meridian, shone in very free
ly: then drawing out the Aire with speed
united the Sun-beames with a burning
Glass upon the combustible matter which
began immediatly to send forth a Smoke
that quickly darkned the Receiver, but
notwithstanding all our care and diligence
the externall Aire got in so fast that after
diverse tryals we were fayne to leave off
the Experiment in that Glasse and induc'd
to make tryall of it in our great Re
ceiver.
Haveing then after some difficulty
lodg'd the combustible matter in the ca
vity of this Vessell in such manner as that
it was almost contiguous to that side
thereof that was next the Sun, we did en
deavor with a pretty large burning Glass
to kindle it, but found, as we fear'd,
That by reason of the thickness of the
Glass, (which was also of a less pure and
less Diaphanous matter then the o
ther) the Sun-beams thrown in by the
burning Glass, were in their passage
so Dislocated and Scattered (not now to
mention those many that being reflected,
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