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.