On the definition of the standard atmosphere
A 1921 technical report from the NASA Technical Reports Server, catalogued as a study on defining the standard atmosphere, with no named illustrator and no stated audience beyond engineers and scientists. Its three pictures are scientific line graphs plotting altitude in metres from 0 to 14000 against pressure, density, temperature and related quantities, with several curves per chart, dashed reference lines and a labelled law curve. A designer could take their clean, restrained grid-and-curve layout as a reference for technical diagram styling.
