Building Simple Model Steam Engines

A guide to building simple oscillating steam engine models. It describes the making of four such models: Polly, a vertical steam plant, Elizabeth, a horizontal ... » 

A guide to building simple oscillating steam engine models. It describes the making of four such models: Polly, a vertical steam plant, Elizabeth, a horizontal steam power plant, Hercules, a model steam crane, and Jenny Wren, a miniature vertical steam engine. «