170. BERENBRUCH, A. (I. G. Farbenindustrie A. G.). Apparatus for Exothermic Catalytic Gas Reactions. United States Patent 1,869,736, Aug. 2, 1932, Chem. Abs. Vol. 26, 1932, p. 5230.

Tubes containing the catalyst are closely packed together in a bundle in a reaction chamber. Describes various structural details.