Bacon, Francis, Sylva sylvarum : or, a natural history in ten centuries
page |< < (81) of 389 > >|
11581Century IV. or no ſmell; ſo that the ſmell is a ſecond ſmell that iſſueth out of the Flower
after wards.
THe continuance of Flame, according unto the diverſity of the Body en-
11366. flamed, and other circumſtances, is worthy the enquiry;
chiefly, for
22Experiments
in Conſort,
touching the
Continuance
of Flame.
that though Flame be (almoſt) of a momentany laſting, yet it receiveth the
More, and the Leſs:
We will firſt therefore ſpeak (at large) of Bodies en-
flamed, wholly, and immediately, without any Wiek to help the Inflamma-
tion.
A ſpoonful of Spirit of Wine, a little heated was taken, and it burnt
as long as came to 116 Pulſes.
The ſame quantity of Spirit of Wine, mixed
with the ſixth part of a ſpoonful of Nitre, burnt but to the ſpace of 94
Pulſes.
Mixed with the like quantity of Bay-Salt 83 Pulſes. Mixed with the
like quantity of Gun-powder, which diſſolved into a Black-water 110
Pulſes.
A Cube or Pellet of Yellow Wax, was taken, as much as half the
Spirit of Wine, and ſet in the midſt, and it burnt onely to the ſpace of 87
Pulſes.
Mixed with the ſixth part of a ſpoonful of Milk, it burnt to the
ſpace of 100 Pulſes;
and the Milk was crudled. Mixed with the ſixth part
of a ſpoonful of Water, it burnt to the ſpace of 86 Pulſes;
with an equal
quantity of Water, onely to the ſpace of four Pulſes.
A ſmall Pebble
was laid in the midſt, and the Spirit of Wine burnt to the ſpace of 94
Pulſes.
A piece of Wood of the bigneſs of an Arrow, and about a Fingers
length, was ſet up in the midſt, and the Spirit of Wine burnt to the ſpace
of 94 Pulſes.
So that the Spirit of Wine Simple, endureth the longeſt, and
the Spirit of Wine with the Bay-ſalt, and the equal quantity of Water, were
the ſhorteſt.
Conſider well, whether the more ſpeedy going forth of the Flame, be
33367. cauſed by the greater vigor of the Flame in burning;
or by the reſiſtance of
the Body mixed, and the averſion thereof to take Flame:
Which will appear
by the quantity of the Spirit of Wine, that remaineth after the going out of
the Flame.
And it ſeemeth clearly to be the latter, for that the mixture of
things leaſt apt to burn, is the ſpeedieſt in going out, and note by the
way, that Spirit of Wine burned, till it go out of it ſelf, will burn no more,
and taſteth nothing ſo hot in the mouth as it did;
no nor yet ſour, (as
if it were a degree to wards Vinegar) which burnt Wine doth, but flat and
dead.
Note, that in the Experiment of Wax aforeſaid, the Wax diſſolved in
44368. the burning, and yet did not incorporate it ſelf with the Spirit of Wine, to
produce one Flame;
but whereſoever the Wax floated, the Flame ſorſook
it;
@ill at laſt it ſpred all over and put the Flame quite out.
The Experiments of the Mixtures of the Spirit of Wine enflamed, are
55369. things of diſcovery, and not of uſe:
But now we will ſpeak of the continu
ance of Flames, ſuch as are uſed for Candles, Lamps, or Tapers, conſiſting
of Inflamable Matters, and of a Wiek that provoketh Inflamation.
And this
importeth not onely diſcovery, but alſo uſe and profit;
for it is a great
ſaving in all ſuch Lights, if they can be made as fair and right as others, and
yet laſt longer.
Wax pure made into a Candle, and Wax mixed ſeverally
into Candle-ſtuff with the particulars that follow, (Viz.
Water, Aqua-vitæ,
Milk, Bay-ſalt, Oyl, Butter, Nitre, Brimſtone, Saw duſt,) every of theſe bear-
ing a ſixth part to the Wax;
and every of theſe Candles mixed, being
of the ſame weight and wiek, with the Wax pure, proved thus in the
burning, and laſting.
The ſwifteſt in conſuming was that with Saw-
duſt, which firſt burned fair till ſome part of the Candle was

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