which muſt be done by degrees otherwise the glaſſe will certainly crack in the place where it is nipped.
Note that the pan muſt ſtand upon ſome frame or ſome hollow place that there may be a paſſage for the pipe to come through it.
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Alſo the bolt head muſt ſtand upon a trefoot or ſome other firme place according to this figure.
An Explanation of ſuch hard words, and tearms of art,
which are uſed in this enſuing Treatiſe.
AMalgamation, is a calcining or corroding metals with quick-ſilver, and is done thus. Take any metall except iron, beaten into thin leaves, or very ſmall powder, mix it with about 8 parts of quick-ſilver (which may the better be done if both be heated firſt) that they may become one uniform maſſe; evaportae the quick-ſilver over the fire, and the metall wil be left in the bottome as a thin calx.
