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Tractors play a major role in mining and cultivating salt in the 1920s, at a salt field. (1920s)
1930s: Coffee beans are pulped and washed before being laid out to dry, as demonstrated in these scenes from a 1930s film about the Hills Bros Coffee Company.
Construction of roads and test site structures at Enewetak Atolls in the Pacific Ocean for Operation Sandstone, 1947. (1940s)
CIRCA 1931 - Raw materials are mined and transported by train and ship.
CIRCA 1920s - Silent 1920s era science film showing what happens when air is pumped and put under pressure.
Silent 1920s era science film showing what happens when air is pumped and put under pressure.
CIRCA 1940s - The usefulness of portable emergency phone equipment is demonstrated in 1948.

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CIRCA 1920s - Tractors play a major role in mining and cultivating salt in the 1920s, at a salt field.

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  • 2:58

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