3224.     SMITTENBERG, J.  [Influence of Temperature and of Pressure on the Adsorption of Hydrogen by Nickel.]  Rec. trav. chim., vol. 52, 1933, pp. 112-122; Chem. Abs., vol. 27, 1933, p. 2362.

        Isotherms for the adsorption of H₂ gas on N at 300°, 210°, 123°, and 15° and the isobar at 760 mm. for this temperature range were obtained.  Adsorption is of 2 types:  Between 10 and 760 mm. it is rapid and and reversible; below 10 mm. it is slow, and equilibrium is reached only after some days.