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Unidad documental compuesta Science and technology Con objetos digitales
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Milk and dairy

Lantern slides used for teaching agriculture at Belleville Collegiate Institute and Vocational School, Belleville, Ontario, in the 1920s.

These slides were distributed by Scott & Van Altena of 6 East 39th St., New York, for the Educational Department of the De Laval Separator Company.

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Belleville Business: Stewart-Warner

This file contains an essay titled "Four Decades of Radio, Television and Electronics" written in June 1986 and gives a brief history of the Belleville based business Stewart-Warner Alemite. The essay was published as part of a supplement to the Intelligencer celebrating 65 years of the firm, where the authors are identified as F. C. Ethier and S. D. Hagerman.