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SourcesDespretz C., Traité élémentaire de physique, Méquignon-Marvis, Libraire-éditeur, Paris, 1832, pag. 315, TAV. 6, fig. 168.
Drion Ch. - Fernet E., Traité de physique élémentaire, G. Masson éditeur, Paris, 1877, pag. 156, fig. 168.
The indications that complete the voice "Working" have the following meaning: P = partial; R = repaired; * = used for the didactics; X = verification impossible.