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Ampere's Stand as it appears in the 1912 Max Kohl Catalog. |
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The apparatus with one of the wire frames in place, the pivot at the top is missing. |
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Reversing switch. |
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Each knob is numbered, 1-8 on the base and 9-12 on the second stand. |
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Troughs that hold the mercury. The two small holes allow electrical contact with the points at the end of the wire frames. |
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