22.
It will be neceſſary that thou know all ſsuch inſtruments
that thou ſhalt uſe about thy furnace and glaſſes, whereof ſome
are already expreſſed, and ſome more ſhall be here deſcribed.
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A, Signifies an iron rod with two iron rings at the ends thereof, which muſt
be heated red hot and applyed to that part of the glaſſe which thou
wouldeſt break off. When thou haſt held it there ſo long till the glaſſe be
very hot, then take it off, and drop ſome cold water, where thou wouldeſt
have it break off, and it will preſently crack in ſunder. Theſe rings are
for ſuch glaſſes as will goe into them : Thou muſt have divers of this
sort, even of all ſizes.
B, An iron hook which must be heated hot and applyed to any great glaſſe
that will not goe into a ring, this hook hath a wooden handle.
C, A paire of tongs which are for divers uſes.
D, A crooked iron to rake betwixt the grates to clear them.
E, An iron rake to rake the aſhes out of the aſh hole.
A thread dipt in melted brimſtone and tyed about a glaſs, and
then fired, may ſerve in ſtead of the iron rings, and the hook.
