The instructional units and related materials in this guide are designed to assist in the preparation of courses of study/instruction in (1) power mechanics specifically, (2) power mechanics which serve as introductory courses in other areas of industrial arts, and (3) automotive mechanics which also cover the broader aspects of power mechanics. Each unit presents a broad coverage of the topic indicated by its title, covers the scientific principle involved, suggests methods of applications of the technical and scientific information, and lists selected references to further technical and scientific information. These references are keyed by numbers in parentheses to the complete list of selected references at the end. There are 40 units presented under seven section headings: (1) Natural Power (muscle power, waterwheels, windmills, heat collectors, and solar stills); (2) Mechanical Power (simple and compound machines, lubrication, springs, clutches, and dynamometers), (3) Steam Power (steam engines and turbines), (4) Thermal Power (high-energy rate forming, powder-actuated tools, jet and rocket engines, gasoline testing, carburetion, two- and four-cycle engines, wankel engines, thermostats, and welding processes), (5) Electrical Power (dry cells: primary cells, storage batteries: secondary cells, generation of electricity, transmission of electric power, transformers, spark plugs, ignition systems, electric motors, fuel cells, photoelectric cells, and semiconductor power rectifiers), (6) Hydraulic Power (jacks and presses, machine tools, braking systems, fuel pumps, power steering, and air conditioners), and (7) Pneumatic Power (air-powered tools, spray guns, and vacuum pumps). Appendix A presents a relatively brief course outline for industrial arts power mechanics, and appendix B a comprehensive course outline for industrial arts automotive mechanics. Appendix C contains terminology on the storage battery. Appendix D is assignment sheets. (JT)