| A Chicago Apparatus Company resistance box used for circuit testing and laboratory work with a gutta-percha bed and mahogany base; image credit on full record. |
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Electricity; Resistance Box, Chicago Apparatus Co, Lab Equipment, Mahogany.
Chicago Apparatus Company resistance box, Science Laboratory Equipment, Chicago, Illinois, with a gutta-percha bed, brass resistance plug sockets, and... [more detail available via subscription]
p4A Item E8942258
Category: |
science & technology |
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Origin: |
Illinois |
Type: |
electricity |
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Year: |
1900 - 1940 |
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