## Metadata - Author: [[Alan Hirshfeld]] - Full Title: The Electric Life of Michael Faraday - Category: #books ## Highlights - That no one before Oersted had observed the magnetic aspect of electricity may seem astonishing in retrospect, especially when battery-powered electric circuits were common in 1820s-era laboratories, and compasses had been around for centuries. True, the influence of a current-carrying wire on a compass needle can be subtle. (I've tried. It helps to wrap the wire several times around the compass to concentrate the magnetic effect.) But, more important, most scientists at the time had been educated (indoctrinated?) to believe that electricity and magnetism were distinct phenomena. In France, for example, where the ideas of the influential eighteenth-century physicist Charles Coulomb dominated the scientific community, electricity and magnetism were understood to be different fluids that do not interact with each other. After Oersted's announcement, physicist Andre-Marie Ampere lamented to a friend, "You are quite right to say that it is inconceivable that for twenty years no one tried the action of the voltaic pile on a magnet. I believe, however, that I can assign a cause for this; it lies in Coulomb's hypothesis on the nature of magnetic action; this hypothesis was believed as though it were a fact [and] it rejected any idea of action between electricity and the so-called magnetic wires. This prohibition was such that when [physicist] M. Arago spoke of these new phenomena at the Institute, they were rejected . . . Every one decided that they were impossible." ([Location 1155](https://readwise.io/to_kindle?action=open&asin=B002STNBAC&location=1155))