 Orthogonality of electric and magnetic vector fields in space was extended by hyperbolic orthogonality for the temporal factor.When Ludwik Silberstein published his textbook "The Theory of Relativity" (1914) he related the new geometry to electromagnetism.Faraday's law of induction was suggestive to Einstein when he wrote in 1905 about the "reciprocal electrodynamic action of a magnet and a conductor".