An Investigation of the Elements which Contribute to Statical and Dynamical Stability, and of the Effects of Variation in Those Elements
This is a 1918 aeronautical technical report, an investigation of stability in aircraft, issued by a government research body for engineers and aviation researchers. The single picture is a graph plotting lift against angle of incidence for a model with a medium body and tail set at a fixed angle, with curves for different tail sizes drawn as solid and dashed lines on a grid. A designer could take from it the clean ruled-grid line-chart look, with thin black curves and typed annotations, as a plain scientific diagram style.
