The aeroplane handbook
A 1920 technical manual on airplane design and performance by Arthur John Swinton, published in London by The Aeroplane and General Publishing Company for engineers, draughtsmen and aviation students. Pages mix set equations with line diagrams: force polygons, braced truss bays with dimensions, angle-of-incidence and flight-path constructions in solid and dashed rule, usable as engineering linework and formula texture.
