This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1817. Excerpt: ... acquaintance with their habits, or peculiar wants and desires. We cannot, therefore, so well perceive the reasons of those varieties of formation we discover, nor judge of their adaptation to the peculiar exigencies of the being that possesses them. In many instances also the organization is extremely obscure, and in some it is probable that it never can be developed.