Audels Sheet Metal Workers Handy Book

"The purpose of this book is to present the fundamentals of Sheet Metal Work layout in a clear and simple language. The subject matter is divided into two parts: 1 - Practical Pattern Cutting, followed by instructions in the use of various Sheet Metal Machines, Welding of Sheet Metal and Boiler Plate Work.2 - Drafting, Plan reading, Geometrical Problems and Mathematics necessary for proficient workmanship in the modern sheet metal shop."