389.     BRUNAUER, S., EMMETT, P. H., AND TELLER, E.  Adsorption of Gases in Multimolecular Layers.  Jour. Am. Chem. Soc., vol. 60, 1938, pp. 309-319; Chem. Abs., vol. 32, 1938, p. 4037.

      Polarization theory of multimolecular adsorption discussed critically.  The adsorption energy, owing to attraction of dipoles induced into a nonpolar gas such as A, is insufficient to constitute a major portion of the binding energy between adsorbed layers.  Adsorption-isotherm equations for multimolecular adsorption are derived on the assumption that the same forces that produce condensation are responsible also for multimolecular adsorption.  Numerous applications of the equations are given to experimental adsorption isotherms.