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[Untitled photo, possibly related to: Summit, California. The brakeman opening the retainer valve on a car on the Atchison, Topeka and Santa Fe Railroad between Barstow and San Bernardino, California. From here to San Bernardino is one long downgrade of more than 2700 feet]. Sourced from the Library of Congress.

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[Untitled photo, possibly related to: Summit, California. The brakeman opening the retainer valve on a car on the Atchison, Topeka and Santa Fe Railroad between Barstow and San Bernardino, California. From here to San Bernardino is one long downgrade of more than 2700 feet]. Sourced from the Library of Congress.

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