High pressure storage and purification plant at the Haber Synthetic Ammonia Catalyst Testing Plant, American University in Washington, The plant is used for testing the catalyst for the production of synthetic ammonia. This photograph was taken on January 30, 1920 by Sergeant HTZZ, This is an official US photo (077770).

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Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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