Mobile Telephones 1949
How the mobile telephone system works, and how mobile phones can benefit businesses such as trucking and construction companies.

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Dial Comes to Town 1946
A grandfather is reluctant to use the new dial telephones coming to his town. Gives background of the change to dial service, and also illustrates proper dial usage.

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Thrills for You 1940
Pioneering 3D promotional film about the Pennsylvania Railroad.

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Pete-Roleum and His Cousins 1939    star_border 6.5
Pete Roleum, an oil droplet, narrates a presentation about the history and uses of oil: He starts by introducing some of his relations, with illustrations of the things that they have done throughout history. He then turns to the modern era, and shows that oil has a great many important uses, some of which might come as something of a surprise.

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