ねじれ秤ばかり

noun

torsion balance

A scientific instrument that measures small forces by the twisting of a wire or fiber. Used in physics experiments, notably by Coulomb.

• クーロンはねじれ秤ばかりを使つかって電でん気き力りょくを測そく定ていした。

  Coulomb measured electric force using a torsion balance.