Leçons sur l'électricité et le magnétisme (vol. 1): Les corps conducteurs à l'état permanent 1.0

pp. 13ff. mention [Lagrange's introduction of the scalar potential in 1777](https://archive.org/stream/oeuvresdelagrang04lagr#page/396/mode/2up) cf. [this Physics StackExchange answer](https://physics.stackexchange.com/a/321814/10024). **TXT** & **EPUB** are a [DeepL](https://www.deepl.com/translator.html) Pro [NMT](https://www.deeplearningbook.org/contents/applications.html#pf1f) machine **English translation**.