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Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)

Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 172

An illustration from Electrical and scientific instruments and apparatus : november 20th, 1899, 1899, leaf 172 — Fig. 141: HOTCHKiss Oscillograph (Assembled). … Fig. 143. HoTCHKiss Oscillograph (Not Assembled).

Electric apparatus and appliances · Equipment and supplies

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