The letter E you shall form in its square thus: Draw a transverse line
e. f. bisecting a. b. and c. d. in e. and f.; then draw the great
vertical limb of the letter, to the left, as you did for D. Next draw
also an upper transverse limb of narrower dimensions, parallel to a. b.
and in length six-tenths minus one-third of one-tenth of the length of
a. b.; and the end of this bend downwards one-tenth of the length of
a. b. and use this as the diameter of the circle with which you round
out the inner angle of this extremity: then draw your narrow middle limb
parallel to the median line e. f. and above it, so that it may be
shorter than the upper limb by one-tenth of the length of a. b., but at
its terminus double as wide; & you are to round it out (in either
direction) by the arc of a circle whose diameter is one-sixth the length
of e. f. Now construct your lowest limb upon the line c. d., so that at
its ultimate angle it may exceed in length the upper limb by one-tenth
of c. d.; the cusp, however, you are to prolong beyond this part by
two-thirds of one-tenth part, and erect above it to one-sixth of the
length of c. d., and round out the same by a circle whose semi-diameter
is also a sixth of c. d. In like manner the final angle of the letter
you shall round out by an arc of the same circle by which you rounded
out the middle transverse limb: the other angles you are to leave acute,
as in the following cut.
[Illustration: E]