Likewise the letter N you shall make in its square thus: First you are
to draw two standards vertical and slender, so that at top & bottom they
may touch the square, & that being produced, the nigh one at the bottom,
and the farther at the top, they may touch the angles at c. and b. Now
join these two by a broad oblique limb, running from the angle a. to the
point e., by which is denoted the remote side of the farther limb, where
you shall allow the acute angle to remain; but at the top, this limb,
produced beyond the angle a., you are to round out to a fifth part of
the length of a. b. This prolongation should incurve below, a fifteenth
part of the distance a. b. projected on two arcs, the upper one the
greater, the lower the less. For the lesser arc, therefore, you shall
take as diameter of its circle, a line the fifth part of the distance
a. b. and its centre is to be taken outside the square, so that the foot
of the compass may touch the tip of the extension and the angle a.; then
extend a little the feet of the compass, and shift its centre until the
arc touch both the tip of the part produced, & the broad oblique limb,
in the middle point between the side a. c. & the nearer of the two
slender vertical limbs.
Or you may make the letter N in such fashion that its upper nigh
extension shall remain within the square; or you may make from it an
acute angle as shown overleaf.
[Illustration: N]