At the time of the decease of the author of this work he had under contemplation a new edition, with various enlargements. Several of the topics he had treated of assumed more importance as a wider experience of life taught him the follies and weaknesses of his fellow men.

It has been thought best to group these additions in the form of an Appendix, rather than to incorporate them in the body of the book. While this has been done, the text itself has undergone careful examination, and whatever errors noted have been corrected, and general statements altered, where necessary, into accordance with the progress of medical science.

The very high estimation in which this book has been held by so many of the best authorities in the land, does away with the necessity of any praise of it on the part of the present editor. It is sufficient to point to the testimonials which accompany the volume, to see its rank and character.