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San Bernardino, California. A tunnel at the ice plant through which air is blown on its way to the refrigerator cars. Cooling tubes along the walls keep the air at a constant temperature. Sourced from the Library of Congress.
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San Bernardino, California. A tunnel at the ice plant through which air is blown on its way to the refrigerator cars. Cooling tubes along the walls keep the air at a constant temperature. Sourced from the Library of Congress.

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San Bernardino, California. A tunnel at the ice plant through which air is blown on its way to the refrigerator cars. Cooling tubes along the walls keep the air at a constant temperature. Sourced from the Library of Congress.

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