Experimental investigation of the physical properties of medium and heavy oils, their vaporization and use in explosion engines. Part I
This is a 1926 NACA technical memorandum on the physical properties and vaporization of medium and heavy oils for explosion engines, produced by the National Advisory Committee for Aeronautics for engineers and researchers. The first picture is a line graph of numbered curves rising steeply across a grid, and the second is a technical line drawing of a laboratory apparatus with glass tubes, a heating vessel, a return cooler, and a vertical gauge, suggesting clean schematic diagrams for engineering layouts.
