Engines and fuels
A 1923 technical report from the NASA Technical Reports Server, catalogued under engines and fuels, consisting of laboratory data for engineers and fuel researchers. The two pictures are plain line graphs with no illustrative artwork: one plots volume in cubic centimetres against a temperature axis as a rising curve, and the other shows distillation of an 'Extra' gasoline sample, with a labelled specific gravity and a steep near-linear rise from about 75 to 125 degrees. A designer might take only the clean grid-and-curve layout as a model for scientific chart styling.
