Leçons sur la théorie mathématique de l'électricité: Professées au Collège de France

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Cited in a few places of [Ampère, Assis, & Chaib 2015](https://isidore.co/calibre/browse/book/5464) ([original source](http://www.ifi.unicamp.br/%7Eassis/Amperes-Electrodynamics.pdf)) regarding how Ampère's law is the only one acting along the straight lines collecting the elements that gives the same force between current elements as the integrated force gives between current loops of arbitrary shape.Duhem also has a § of Bertrand's derivation (cf. p. 166) of Ampère's law in Duhem's [*Leçons* vol. 3](https://isidore.co/calibre/browse/book/3407) pp. 309-332 (DjVu pp. 322-345). Duhem in *ibid*. also considers Bertrand's " *belles recherches sur la loi d’Ampère* ", e.g. * Joseph Bertrand, “[Sur La Démonstration de Un Formulé Qui Représente l’action Élémentaire de Deux Courants](https://isidore.co/misc/Physics%20papers%20and%20books/Zotero/storage/N2X5XTC8/Bertrand%20-%201872%20-%20Sur%20la%20d%C3%A9monstration%20de%20un%20formul%C3%A9%20qui%20repr%C3%A9sente%20.djvu),” *Comptes Rendus Physique* 75 (1872): 733–36.