The Power Catechism is a technical question-and-answer handbook compiled from material originally published in the engineering journal Power. First issued in 1897, it was designed to assist engineers, mechanics, and students studying for professional examinations or seeking practical information about power-plant machinery.

The book explains the fundamental principles of steam engineering and power transmission through direct questions followed by concise answers. Its subjects include steam engines, boilers, pumps, engine indicators, combustion, efficiency, mechanical power, and the operation of industrial equipment.

The “catechism” format made complicated engineering principles easier to study and remember. Books like this were especially valuable when stationary engineers were expected to understand, operate, and troubleshoot an entire steam-powered plant.

The museum’s copy is identified on its title page as the seventh impression, demonstrating the handbook’s continued usefulness during the early 20th century.