1and cloſ'd it ſpeedily as before; and then
waiting till the Fire ſeem'd totally ex
tinct without medling with the Pump, we
found that from the time the Veſſel was
cloſ'd till that no Fire at all could be per
ceiv'd there had paſſed about four mi
nutes: Whereby it ſeem'd to appear that
the drawing away of the ambient Air
made the Fire go out ſooner then other
wiſe it would have done; though that part
of the Air that we drew out left the more
room for the ſtifling ſteams of the Coals
to be received into.
waiting till the Fire ſeem'd totally ex
tinct without medling with the Pump, we
found that from the time the Veſſel was
cloſ'd till that no Fire at all could be per
ceiv'd there had paſſed about four mi
nutes: Whereby it ſeem'd to appear that
the drawing away of the ambient Air
made the Fire go out ſooner then other
wiſe it would have done; though that part
of the Air that we drew out left the more
room for the ſtifling ſteams of the Coals
to be received into.
Laſtly, Having taken out the Wier
and put other Coals into it, we did, in the
ſame Room where the Engine ſtood, let it
hang quietly by a ſtring in the open Air,
to try how long the Fire would laſt with
out agitation when no Air was kept from
it. And we found that the Fire began to
go out firſt at the top and out-ſides of the
Coals; but inwards and near the bottom
the Fire continu'd viſible for above half
an hour, a great part of the Coals, eſpe
cially thoſe next the bottom, being burnt
to aſhes before the Fire went out.
and put other Coals into it, we did, in the
ſame Room where the Engine ſtood, let it
hang quietly by a ſtring in the open Air,
to try how long the Fire would laſt with
out agitation when no Air was kept from
it. And we found that the Fire began to
go out firſt at the top and out-ſides of the
Coals; but inwards and near the bottom
the Fire continu'd viſible for above half
an hour, a great part of the Coals, eſpe
cially thoſe next the bottom, being burnt
to aſhes before the Fire went out.
We cauſ'd likewiſe a piece of Iron to
be forg'd, of the bigneſs of a middle ſiz'd
Char-coal, and having made it red hot
be forg'd, of the bigneſs of a middle ſiz'd
Char-coal, and having made it red hot
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