Causes of Cracking of Ignition Cable
A 1921 technical report from the NASA Technical Reports Server, issued as a record of research into why ignition cable insulation cracks, with no named illustrator. The single picture is a dark, grainy photograph of a coiled, ribbed cable lit against black, with a faint bright spark or glow above it, suggesting a designer could draw on its high-contrast, low-key lighting and sparse composition for dramatic texture studies.
