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For broadcast quality material of this clip or to know more about our Public Domain collection, visit or contact us at info@ 1938 Blacksmith cranking forge, red hot iron in coals. Animation of molecules moving about. Kinetic Theory of matter illustrated. Slow down as temperature decreases. Rod heated.. Superimposed heat driving turbines, locomotives, automobiles. 13:38:06 Animated illustration of air forced up through coals from bottom & carbon & oxygen of air uniting to give off heat. 13:38:31 Large steam locomotive engine to stop. Animated overlay showing workings of steam engine w/ firebox, boiler & cylinder moving to power wheels making use of sliding valve to bring in hot steam. 13:40:17 Vanes of airwheel turned by air. Animation of steam turbine in cut-away showing multiple rotors. 13:41:36 Turbine seen in place in large electric generating plant. 13:41:53 Automobile sedan pulls up to service station gasoline pump. A
