Oxy-Acetylene Welding And Cutting

e of these operations being to add or retain certain desirable qualities in the materials being handled. For this reason the following subjects have been included Annealing, tempering, hardening heat treatment and the restoration of steel. In order that the user may understand the underlying principles and the materials employed in this work, much practical information is given on the uses and characteristics of the various metals on the production, handling and use of the gases and other materials which are a part of the equipment and on the tools and accessoriep for the production and handling of these materials. An examination will show that the greatest usefulness of this book lies in the fact that all necessary information and data has been included in one volume, making it possible for the workman to use one source for securing a knowledge of both principle and practice, preparation andfinishing of the work, and both large and small repair work as well as manufacturing methods used in metal working. An effort has been made to eliminate all matter which is not of direct usefulness in practical work, while including al1 that those engaged in this trade find necessary. To this end, the descriptions have been limited to those methods and accessories which are found in actual use today. For the. same reason, the work includes the application of the rules laid down by the insurance underwriters which govern this work as well as instructions for the proper care and handling of the generators, torches and materials found in the shop. Special attention has been given to definite directions for handling the different metals and alloys which must. be handled. The instructions have been arranged-. t o form rules. which are placed in the order of their use during the work described a. nd the work has been subdivided in such a way that it will be found possible to secure information on any one point desired without the necessity of spending time in other fields. The facts which the expert welder and metalworker finds it most necessary to have readily available have been secured and prepared especially for this work, and those of most general use have been combined with the chapter on welding practice to which they apply. The size of this volume has been kept as small as possible, but an examination of the alphabetical index will show that the range of subject and details covered is complete in all respects. This has been accom-, plished through careful classification of the contents and the elimination of all repetition and all theoretic, historical and similar nlatter that is not abso-111 t cly necessary. Free use has been made of the information given 1-those nannfactnrers who are recognized as the leaclers in their respective fields, thus insuring that tlic work is thoroughly practical and that it represents present day methods and practice... --This text refers to the Paperback edition.