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AN easie way to Dispart a Peece of Ordnance. First, Take the Diameter of the Peece upon the thickest part at the Breech with a pair of Callabasser Compasses, and likewise at the Musle at the thickest part thereof; then draw upon a Paper or Board both Diameters: So laying a Ruler through
the Centre, draw the Diameter, and then you may the easier take the Difference betwixt them.
Example.* 1.1The Diameter of the Breech (in the preceding Figure) is EF, the Diameter at the Musle CD, and the Diameter of the Bore AB; so you see the Difference betwixt the two Cir∣cles is DF or EC, which is the true Dispart of that Peece. If you take a piece of Wax, or Straw, or Stick, of the length DF, and set on the Muslle at D, you have a true Dispart: I have made them of Iron and screwed them on.
The only way to Dispart a Peece of Ordnance.