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JAMES JACKSON, M.D.

PROFESSOR EMERITUS OF THEORY AND PRACTICE OF PHYSIC IN THE UNIVERSITY AT CAMBRIDGE, HONORARY MEMBER OF THE ROYAL MEDICO-CHIRURGICAL SOCIETY OF LONDON, ETC. ETC.

DEAR SIR,

Please to accept the accompanying volume. It is written, not as I would, but as I have been able. The remedy of pain was discovered in this city, and has already taken its place among the most important agencies for the benefit of man. It is due to it, that what it has accomplished should have its earliest embodiment in our own literature. In relation to Surgery, this has already been done in the publications of JOHN C. WARREN, M.D. Professor Emeritus of Anatomy and Operative Surgery, and GEORGE HAYWARD, M.D. Professor of Surgery, in the University at Cambridge; and of J. MASON WARREN, M.D.

Occupying a somewhat public position as a teacher of Midwifery,—a department of medicine which has derived special and vast benefit from the discovery referred to, it seemed not out of place for me to collect, and present to the profession, the results of its application, amongst ourselves and elsewhere, to that branch of the medical art. This I have attempted to do in the following pages.

In my labor, I have not forgotten is done

nor do I forget, now that my work that I received from you my earliest and most important lessons in the study of medicine. I was then a young man; and, now that I am an old one, it is to me a most pleasant office to ask your acceptance of this, the latest product of my professional life, and, with it, assurances of a grateful memory and a sincere respect.

Very truly your obliged friend,

BOSTON, September, 1848.

WALTER CHANNING.

The APPENDIX is referred to in the body of the Work. But I would again solicit for it the reader's attention, as it contains both original and selected matter, which has an important bearing on the subject of the volume.