Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660

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                <pb xlink:href="013/01/120.jpg" pagenum="80"/>
              and cloſ'd it ſpeedily as before; and then
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              waiting till the Fire ſeem'd totally ex­
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              tinct without medling with the Pump, we
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              found that from the time the Veſſel was
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              cloſ'd till that no Fire at all could be per­
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              ceiv'd there had paſſed about four mi­
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              nutes: Whereby it ſeem'd to appear that
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              the drawing away of the ambient Air
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              made the Fire go out ſooner then other­
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              wiſe it would have done; though that part
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              of the Air that we drew out left the more
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              room for the ſtifling ſteams of the Coals
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              to be received into. </s>
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              <s>Laſtly, Having taken out the Wier
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              and put other Coals into it, we did, in the
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              ſame Room where the Engine ſtood, let it
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              hang quietly by a ſtring in the open Air,
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              to try how long the Fire would laſt with­
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              out agitation when no Air was kept from
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              it. </s>
              <s>And we found that the Fire began to
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              go out firſt at the top and out-ſides of the
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              Coals; but inwards and near the bottom
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              the Fire continu'd viſible for above half
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              an hour, a great part of the Coals, eſpe­
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              cially thoſe next the bottom, being burnt
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              to aſhes before the Fire went out. </s>
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              <s>We cauſ'd likewiſe a piece of Iron to
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              be forg'd, of the bigneſs of a middle ſiz'd
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              Char-coal, and having made it red hot </s>
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          </chap>
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