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  • I continue to form a column. If the column contains about twenty of these couples of metal, it will be capable of giving to the fingers several small shocks.

    ALESSANDRO VOLTA
  1. black
  2. grey
  3. blue
  4. red
  5. brown
  6. white

I continue to form a column. If the column contains about twenty of these couples of metal, it will be capable of giving to the fingers several small shocks.