ABSTRACT
When one speaks of the relations between light and electricity, the lay mind at once thinks of the electric light. Faraday delighted in investigating the connection between light, electricity, and magnetism. The clue that Maxwell followed is well known to the initiated. It had attracted the attention of other investigators; it had suggested to Riemann and Lorenz speculations of a similar nature, although not so fruitful in their results. As a consequence velocities appear in the mutual relations between electricity and magnetism, and the constant that governs these relations and continually recurs in them is itself a velocity of exceedingly great magnitude. Electricity is able to simulate the phenomena of elasticity. The period of a single oscillation is much shorter than the total duration of the discharge. The connection between light and electricity, of which there were hints and suspicions and even predictions in the theory, is established; it is accessible to our senses and intelligible to our understanding.
