Much has happened since this Manual was last revised, and many surgical lessons have been learned in the hard school of war. Some may yet have to be unlearned, and others have but little bearing on the problems presented to the civilian surgeon. Save in its broadest principles, the surgery of warfare is a thing apart from the general surgery of civil life, and the exhaustive literature now available on every aspect of it makes it unnecessary that it should receive detailed consideration in a manual for students. In preparing this new edition, therefore, we have endeavoured to incorporate only such additions to our knowledge and resources as our experience leads us to believe will prove of permanent value in civil practice.

For the rest, the text has been revised, condensed, and in places rearranged; a number of old illustrations have been discarded, and a greater number of new ones added. Descriptions of operative procedures have been omitted from the Manual, as they are to be found in the companion volume on Operative Surgery, the third edition of which appeared some months ago.

We have retained the Basle anatomical nomenclature, as extended experience has confirmed our preference for it. For the convenience of readers who still employ the old terms, these are given in brackets after the new.

This edition of the Manual appears in three volumes; the first being devoted to General Surgery, the other two to Regional Surgery. This arrangement has enabled us to deal in a more consecutive manner than hitherto with the surgery of the Extremities, including Fractures and Dislocations.

We have once more to express our thanks to colleagues in the Edinburgh School and to other friends for aiding us in providing new illustrations, and for other valuable help, as well as to our publishers for their generosity in the matter of illustrations.

March 1921.