The resistance to the steady motion of small spheres in fluids
A 1926 technical report on the resistance that fluids offer to small spheres moving steadily through them, issued by NASA's Technical Reports Server and aimed at engineers and physicists. The pictures are plain log-scale graphs with hand-plotted data points and fitted curves, one plotting a drag ratio against a dimensionless group and one plotting terminal speed against sphere diameter with a labelled Stokes' law line. A designer might take from them only a restrained, clinical graph vocabulary of fine grid lines, open circles, and annotated axes.
