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LECT. IV.]

PRINCIPLES OF PROPORTION,

PLATE IV.

1. Draw by the eye an accurate circle as—
A. B. C. D.

2. Draw by the eye three quarters of a circle as
—E. F.

3. Draw by the eye half a circle as—G. H.

4. Draw by the eye a quarter of a circle as—H. I.

OBSERVE

In copying these, or similar lines, care should be
taken that the copy resemble the original, not only
in length, or breadth, but also in direction : i. e. per-
pendicular, horizontal or oblique. As the use of
these subjects is to bring the eye acquainted with
true proportion, and resemblance, too much exactness
cannot be used in imitating them : the habit they are
intended to produce will greatly facilitate following
studies; and when it is requisite to draw a subject on
a different scale from the original, whether larger or
smaller, the benefit arising from correct imitation of
thesej will be felt to great advantage.

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