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A tangent galvanometer by the Central Scientific Company of Chicago with brass ring and copper bezel meter on a wood base with adjustable tripod legs; image credit on full record.

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Electricity; Galvanometer, Central Scientific Co, Tangent Type, 11 inch.

Tangent galvanometer by the Central Scientific Company, Chicago, Illinois, brass ring, copper bezel indicator with paper dial divided into four quadra... [more detail available via subscription]

p4A Item E8942259
Category:  science & technology    Origin:  Illinois
Type:  electricity    Year:  1900 - 1940

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