This book attempts to provide useful information on all phases of arc welding: for the machine designer, the structural engineer, the architect, the fabricator, the welder, the supervisor, the inspector, the industrial engineer, the metallurgist, the contractor, the student, and all others interested in any way in metal joining. This 11th edition has not departed from the general form of the book that has proved so practical, but does modernize the contents of that form. The information in the 11th edition on all phases of arc welding includes the many significant developments in the industry during the past five years.