Aircraft Speed Instruments
A 1933 technical report from the NASA Technical Reports Server, issued as a series of engineering charts and instrument photographs for aeronautical engineers and pilots. The pictures are plain graph sheets of calibrated grid lines with labelled axes for air speed, air density, temperature and pressure, plus one photograph of a boxed bench instrument with a cylindrical sensing tube. A designer might take from them the restrained look of printed engineering nomograms: fine ruled grids, slanted line families and small numeric scales.
