and polish'd, never batters or stretches it, but cuts a ture
round Hole, just in the point you first place it. You
must have several Sizes of Drills, according as your work
may require. The shape in Fig. 8. is enough to shew the
Fashion of it; but it must be made of good Steel, and
well tempered. A the Point, AB the Shank, C the
Drill-barrel: Where note, that the bigger the Drill-bar∣rel
is, the easier it runs about, but less swift.
And as you must be provided with several Drills, so
you may sometimes require more than one Drill-bow, or
at least, several Drill-strings; the strongest Strings for the
largest Drills, and the smallest Strings for the smallest
Drills: But you must remember, that whether you
use a small or strong String, you keep your Drill-bow
straining your String pretty stiff, or lese your String
will not carry your Barrel briskly about. But your
String and Bow, must both be accommodated to the
Size of your Drill; and if both, or either, be too strong,
they will break, or bend your Drill; or if too weak, they
will not carry about the Barrel, as aforesaid.
The Drill-Plate, or Breast-plate, is only a piece of flat
Iron, fixt upon a flat Board, which Iron hath an hole
punched a little way into it, to set the blunt end of the
Shank of the Drill in, when you drill a hole: Workmen
instead of it, many times use the Hammer, into which
they prick a hole a little way on the side of it, and so
set the Hammer against their Breast.