One of the most useful functions of a modern lathe is its ability to cut any form of external or internal thread of any thread form, pitch or diameter within the overall capacity of the machine. Detailed information of a practical nature is, however, not easy to find - a situation that this book does much to rectify. The author was a very experienced engineer with the capability of converting factual analyses into easily understood forms. His own expertise and the standards to which he worked are evident in his writing, and in addition he is also quite at home with both imperial and metric measures having considerable experience in the conversions required when working in partially metricated areas. This book is not only an invaluable treatise on lathe screwcutting but is also a useful demonstration of working in both imperial and metric standards.