Note 1 — PROPORTION.

This passage has been by some persons much misunderstood, and supposed to require, that the student should be a deep proficient in perspective, before he commences the study of painting; but it is a knowledge of the leading principles only of perspective that the author here means, and without such a knowledge, which is easily to be acquired, the student will inevitably fall into errors, as gross as those humorously pointed out by Hogarth, in his Frontispiece to Kirby’s Perspective.