Ampere's Stand
Ampere's Stand as it appears in the 1912 Max Kohl Catalog.
The apparatus with one of the wire frames in place, the pivot at the top is missing.
Reversing switch.
Each knob is numbered, 1-8 on the base and 9-12 on the second stand.
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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