The small diesel engine as an automotive engine
A 1921 technical report on the small diesel engine as an automotive engine, issued by NASA's Technical Reports Server from an earlier engineering record. The single picture is a line diagram of a pressure or curve trace, with dashed and solid curves falling from a flat plateau to a baseline, marked with roman numeral points and a 1 cm scale bar. A designer could take from it a clean, minimal technical-plot style: thin black lines, sparse labels and a scale reference for an industrial graphic.
