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Sources0.22684100 1518289456, 29, Joubert J., Traité Élémentaire d'electricité, G. Masson Éditeur, Vol. 29, pag. 0, TAV. 433, fig. 0.
The indications that complete the voice "Working" have the following meaning: P = partial; R = repaired; * = used for the didactics; X = verification impossible.