654.    DAHM.  [Influence of the Iron Content of Kieselguhr on the Properties of Catalysts for the Hydrocarbon Synthesis.]  FIAT Reel K29, 1939, frames 6,945,6,948; TOM Reel 296; PB 70,218.

     Object of the work was to determine whether a favorable influence on the coarse of the synthesis with regard to an important reduction in the formation of CH₄ can be obtained by extracting the Fe from the kieselguhr used for catalysts.  The answer is negative.  2 graphs.