P R E F A C E.

I At first intended to have published this treatise in different lectures, as they were delivered in one course of Midwifery; but I found that method would not answer so well, in a work of this kind, as in teaching: because in the course of my lectures, almost every observation has a reference to the working of those machines which I have contrived to resemble and represent real women and children; and on which all the kinds of different labours are demonstrated, and even performed by every individual student.