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21 Mai 1734 Jahr - "Charles du Fay através de estudos sobre os experimentos de Gray, descobriu a existência de dois tipos de eletricidade, conhecidos hoje como positiva e negativa."

Zugefügt zum Band der Zeit:

Hist 2

ByLucas Dick
4 Dez 2018
2
0
657

Datum:

21 Mai 1734 Jahr
Jetzt
~ 291 years ago
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