Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The Chapters on chemistry. Physics and metals are of the most elementary nature. And cover in the plainest language only the subjects that are Vital to the welders information. At the same time they are sufficiently explicit to give him a thorough working knowledge of the subjects that pertain to his work. In these pages we have consulted the works on the Manufacture and Properties of Iron and Steel, By II. II.