Steel production in the United States during World War II. A steel slab produced from an ingot, is spread on a rolling mill, where it is shuttled back and forth through a succession of water-cooled rollers until it obtains the desired shape. Temperature is monitored and recorded by automatic device. Side view of hot steel plate passing between two rollers. Rolling mill operator seen in control booth. Worker monitors gauges on a panel.. The steel plate continues to reduce in thickness until it becomes a steel sheet.
A shipyard in the United States during World War II. A newly christened ship slides down an inclined slipway on its launch.
Steel production in the United States during World War II. Steel billet enters continuous rod mill. Some workers work on machines. Steel billet rolls into concrete reinforcing bars.
Manufacture of Steel at the time of World War II in the United States. Steel sheeting is run through machine rollers and cleaned specifically for use in tin plate. The sheeting is then stiffened and sheared into convenient lengths. Numerous women war workers at individual work stations of the factory, examine and stack the steel sheets. The women all wear the same type dresses and large protective gloves.
Invention of the incandescent lamp by Thomas Edison in the United States. A dramatization: Thomas Edison lying down on a table. His assistants enter the room. Edison walks towards a burning lamp. All the men observe the lamp. A diagram shows the series system of electrical current movement using a 500 Volt generator.
Invention of the incandescent lamp by Thomas Edison in the United States. A dramatization: Thomas Edison and his assistants build a 110 V dynamo. Edison builds a multiple series system. A diagram compares a multiple system with a series system.
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