For nearly a hundred years "Model Engineer" magazine has proved a source of knowledge for a wide variety of engineering practices. Its readership has included many highly experienced engineers, who have answered queries and contributed valuable information in order that everyone involved in the construction and use of machines should be able to extend both scope and skills. Many of the pieces of information regarded as most useful appeared in brief notes or articles, often many years ago, and were never republished. This compilation offers a selection of hints and tips culled from a wide time-scale of the magazine. They may save the reader time and money, and will interest and instruct anyone who works with metal.