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

Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 30

An illustration from Electrical and scientific instruments and apparatus : november 20th, 1899, 1899, leaf 30
Fig. U. W4155-56. Tripod DArsonal. … Fig. 15. W41li- 26

Electric apparatus and appliances · Equipment and supplies

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