This book is for amateurs, with the author describing how to make alterations out of simple and easily obtainable materials, or how to avoid the necessity for expensive tools at all. He also describes how to dismantle and assemble movements, what may go wrong with them, and how to set faults right. He tells you how to oil the right parts and how to restore cases in all stages of decay. The book is illustrated with over 270 line drawings specially drawn to the author's specification, ranging from step-by-step demonstrations of how to do things, to diagrams of movements identifying each part and its position in the movement.