2114.     LINDE, R.  [Progress in Large-Scale Production of Oxygen.]  Glückauf, vol. 72, 1936, pp. 114-118; Chem. Abs., vol. 30, 1936, p. 6142.

        Methods of fractionating liquid air for O₂ are discussed.  The Fränkl method employing intermittent regenerators in heat exchange, instead of countercurrent exchanges, has proved most efficient.  98% O₂ can now be produced at 1.5 pf. per m.³

        LINGH, A. E.  See abs. 3668.