The Measurement of Pressure Through Tubes in Pressure Distribution Tests
A 1928 NASA technical report on measuring air pressure through long tubes in wind tunnel pressure distribution tests, published for aeronautical engineers and researchers. Its pictures are plain engineering graphs with curved lines, dotted data points, and labelled axes, showing how tube length and rise time affect pressure loss and time lag; a designer might take their clean grid layout and restrained line-chart vocabulary for technical diagrams.
