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Subject Chemical reactions Remove constraint Subject: Chemical reactions

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    • 1928-Aug-21

    General view of an apparatus used to study the thermal decomposition of ammonia of the surface of tungsten, molybdenum, nickel, and iron catalysts at the U.S. Department of Agriculture's Fixed Nitrogen Research…

    • 1928-Aug-21

    General view of a test tube used to study the activity of potassium ions and electrons in the activation of nitrogen gas and hydrogen at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in…

    • circa 1928

    General view of a high-frequency apparatus used in the Fixed Nitrogen Research Laboratory's Arc Laboratory. In the early 20th century, the arc process, in which electric generators are used to combine nitrogen and…

    • circa 1928

    General view of apparatus used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory for the reaction of active nitrogen with carbon monoxide, carbon dioxide, and oxygen and hydrogen gas.

    The Fixed…

    • circa 1928

    General view of the apparatus used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory to introduce silica gel into an arc process. In the early 20th century, the arc process, in which electric…

    • circa 1928

    Apparatus for the production of catalysts used to initiate water-gas shift reactions at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The water-gas shift reaction…

    • 1927-Jul-26

    General view of an apparatus used to oxidize ammonia at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.

    The Fixed Nitrogen Research Laboratory (F.N.R.L.) was…