Construction and standardization of six self inductance coils
A 1918 engineering thesis by Ching Lee Hsun, submitted at the University of Illinois, on building and calibrating six self-inductance coils. The plates are hand-drawn bridge circuits in thin ink line, each diamond-shaped network set inside a red rule border on cream paper, with coiled helices, battery stacks, resistance boxes and dial galvanometers labelled by typed figure numbers.
