curred in Midwifery; but in London, since the year 1740, to the present time, I have been more careful and minute in forming a collection, with a view to make it public.

From a great number of instances, I have selected only the most material, and such as were adapted to the nature of my plan for, I was unwilling to tire the reader with a succession of parallel histories that contain noting essentially different from one another.

In order to render the performance still more complete, I have taken from authors of the best authority, a few extraordinary cases, which seldom occur, as well as borrowed some medical transactions from the most approved modern physicians.

From the instances of natural and tedious labours, the young practitioner will learn how the behave in the like occurrences, and above all things, to beware of being too hasty in offering assistance, while nature is of herself able to effectuate the delivery.