This book is the 23rd edition of “The 'Model Engineer' Series”. With step-by-step directions for designing and building steam turbines for model boats, this volume is highly recommended for the model boat enthusiast, and would make for a fantastic addition to collections of related literature. Contents include: “General Considerations”, “Pressure Developed on Surfaces by an Impinging Jet. Velocity and Flow of Steam Through Orifices”, “Method of Designing a De Laval Steam Turbine”, “Complete Designs for De Laval Turbines. Method of Making Vaners. Shrouding”, “The Theory of Multiple Stage Turbines”, etc. Many vintage books such as this are becoming increasingly scarce and expensive. It is with this in mind that we are republishing this volume now in an affordable, high-quality edition complete with a specially commissioned new introduction on the history of toys.