Archimedes Texts

11
cavity it possesses, it will not let in the
Air, and yet may be put in or taken out
at pleasure, for uses to be hereafter men
tioned. In order to some of which, it is
perforated with a little hole, (8) traversing
the whole thickness of it at the lower
end; through which, and a little brass
Ring (L) fastned to one side, (no matter
which) of the bottom of the stopple
(FG) a string (8, 9, 10) might pass, to
be imploy'd to move some things in the
capacity of the empty'd Vessel; without
any where unstopping it.

The last thing belonging to our Recei
ver, is the stop-cock designed in the first
Figure by (N.) for the better fastening
of which to the neck, and exacter exclusi
on of the Air, there was soder'd on to
the shank of the Cock (X) a Plate of
Tin, (MTUW) long enough to cover
the neck of the Receiver. But because
the cementing of this was a matter of
some difficulty, it will not be amiss to
mention here the manner of it, which
was, That the cavity of the tin Plate was
fill'd with a melted Cement, made of
Pitch, Rosin, and Wood-ashes, well in
corporated; and to hinder this liquid
Mixture from getting into the Orifice (Z)