Investigation of the diaphragm-type pressure cell
A 1932 NASA technical report investigating a diaphragm-type pressure cell, issued from the NASA Technical Reports Server for engineers and instrument researchers. Its four pictures are plain line graphs with gridded axes plotting diaphragm deflection in inches against pressure in inches of water, with several labelled data series, fitted lines and scatter points. A designer might take from them a restrained scientific chart style: dense grid, legend boxes in the upper corner, and muted dashed-and-solid line variations for distinguishing series.
