Wood versus metal in airplane construction
A 1923 technical report from the NASA Technical Reports Server, a patent-style or engineering document comparing wood and metal for aircraft frames, with line drawings of figures and stress-strain plots for a general technical readership. The pictures are plain black-and-white engineering diagrams: a biplane wing and fuselage view, a tube joint and rope fastening detail, and a curve chart of material strength. A designer might take their precise linework and labelled graphs as a model for technical diagram layouts.
