582.    COAL CARBONISATION.  Petroleum and Lube Oils From Coal.  Vol. 1, 1935, p. 66; Wärme, vol. 58, 1935, p. 206.

      Products of the Fischer-Tropsch process for making gasoline and lubricating oils from hard-coal coke are in no way inferior and in some ways superior to natural petroleum products.  For example, the cold-test of a good natural winter oil is –16° C. whereas that of a synthetic product is –42° C.