The Production of Turbulence
This is a 1931 technical memorandum from the NASA Technical Reports Server, issued by the National Advisory Committee for Aeronautics as a research report on fluid turbulence, written for engineers and aerodynamics researchers. Its two pages carry plain line graphs of mathematical curves plotted against labelled axes, with fine grey print and scan marks; a designer might take from them the clean rhythm of stepped axes, dashed curves and sparse labels as a source of minimal technical diagram styling.
