Categories: Alternative conceptions
An example of a historical idea in science that would now be considered an alternative conception:
"Self-induction then opposes all variation in the intensity of a current, just as in Mechanics, the inertia of a body opposes all variation in its velocity. Self-Induction is an actual inertia. Everything takes place as if the current could not be set up without setting the surrounding ether in motion, and as if the inertia of this ether consequently tended to keep the intensity of the current constant. The inertia must be overcome to set up the current, and it must be overcome again to make it cease."
Henri Poincaré (1914) Science and Method (trans. Francis Maitland) Dover Publications, 1952.