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 1352.    HAMMERICH, T.  Analytical-Arithmetical Way of Finding the Research Octane Number in Gasoline of the Fischer-Tropsch Synthesis.  FIAT Reel K-25, 1940, frames 3,853-3,889; PB 70,216; TOM Reel 292.

       Gasolines of the Fischer synthesis were selected since they contain only straight chains of aliphatic hydrocarbons.  From these gasolines the C₃ and C₄ hydrocarbons were separated.  Density at 15° C., I number after the Rosenmund and Kuhnhenn method, and the distillation curve were determined for each gasoline.  From a comparison of the olefin contents, I number, and boiling range, certain relations could be established, which were reproduced in a graph.  By adding the gasifying property of gasoline new graphs could be drawn for direct octane-number reading.