form is continually vivified, sustained, and preserved in the order of its life.
Let it not then be supposed, that the body and its operations are alone the objects of my view in presenting you with the following Letters; for, had this been the case, I should have been content to refer you to the writings of those numerous and able anatomists, who have done themselves so much credit, and the world so much benefit, by their unwearied and accurate researches into the astonishing mechanism of the corporeal or material part of the human constitution.
These writings, however, excellent as they are, contain descriptions only of the casket of what may be denominated MAN but tell you nothing of the jewels and other valuables which it contains; or, to change the meta-
