Air Entraining Agent
Description:
Caption says, "5-AL-480. Specification No. 1133. View of 2.75 foot by 2.75 foot concrete box siphon at Station 100+80, Altus 4.8 lateral, showing metal markers used to designate structures in which air entraining agent has been used in concrete."
Date:
January 9, 1947
Creator:
Parker, D. B.
Item Type:
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Photograph
Partner:
Museum of the Western Prairie