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Shows techniques used in the construction of parallel twin-lane traffic tunnels under the Mersey, with details of construction and problems to be overcome.
The electric arc steelmaking process produces mild steel in bulk as well as the more specialised alloy steels for which it was first used. The film follows the electric arc process from the sorting of scrap...
The British steel industry in action. Commencing with open cast mining of iron ore, shows each stage of the main manufacturing processes that are required to produce steel for industry as sheet, rod, billet,...
Using maps and models interrelated to filmed views of the terrain from the air and ground, the film encourages the formation of a mental picture of the physical features of the ground by understanding and...
Shows how Mendel first elucidated the mathematical laws of inheritance. It explains how the passage of dominant and recessive characteristics from one generation to another depends on discreet particles of...
Describes the latest production methods in steelmaking together with the basic chemical changes which take place in the transition from iron ore to steel. Shows special steels and the use of automation for...
Shows how water provides a stable environment for biological activity. Examines the related processes of diffusion and osmosis by which water carries nutrients to living cells and waste products from them...
Explains the simple school spectrometer before introducing the spectrograph with its photographic recording and extended frequency range. Line spectra are explained diagrammatically as changes of electron...
An American woman commentator looks at the effects of rationing on a typical family in Britain at the end of the war. The film is interesting not only for the explanation of how the rationing system worked...
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