Heat And Its Control

Produced in collaboration with Johns-Manville. "Emphasizes value of heat in accomplishing most of the world's work, and its control by insulation. Pictures religious veneration of sun and flame centuries ago, and re-enacts the research work of James Watt. Shows fabrication of rock wool insulation; uses of this material in homes and industry. Closing scenes show some of the uses of insulation in covering huge boilers, in lining rotary kilns, in the petroleum and iron industries." "Useful to observe the effects of heat, uncontrolled; to learn how heat is transferred by conduction, convection, and radiation; to observe the manufacture and use of some insulators." Washington state