• The first step to be taken, is to study carefully the fundamental phenomenon above described, and to examine all the various circumstances under which it presents itself.

    John Farrar, Jean-Baptiste Biot, César Mansuète Despretz (1839). “Elements of Electricity, Magnetism, and Electro-dynamics: Embracing the Late Discoveries and Improvements, Digested Into the Form of a Treatise : Being the Second Part of a Course of Natural Philosophy, Compiled for the Use of the Students of the University at Cambridge, New England”, p.2