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Lantern slides depicting chickens, turkeys and ducks. These slides were produced by the Province of Ontario Picture Bureau, probably in the 1920s, for use in Ontario schools.

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.

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

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

Glass lantern slides used at Belleville Collegiate Institute and Vocational School to illustrate classes on biology, probably in the 1920s.

Glass lantern slides used at Belleville Collegiate Institute and Vocational School to illustrate classes on astronomy, probably in the 1920s.