Letter from Augustin Fresnel to Fraņcois Arago, on the influence of the movement of the earth on some phenomena of optics.--On the aberration of light, by G.G. Stokes.--On the relative motion of the earth and the luminiferous aether, by A.A. Michelson and E.W. Morley.--On the laws of the reflexion and refraction of light at the common surface of two non-crystallized media, by G. Green.--An essay towards a dynamical theory of crystalline reflexion and refraction (sections 1 and 3) by J. MacCullagh.--On a gyrostatic adynamic constitution for ether, by W. Thomson (Lord Kelvin).--On the electromagnetic theory of the reflection and refraction of light (an extract) by G.F. Fitzgerald.--The rotational ether in its application to electromagnetism, by O. Heaviside.--Aether and matter (sections 49-54, 102-116), by J. Larmor.--An inquiry into electrical and optical phenomena in moving bodies (introduction) by H.A. Lorentz.--Simplified theory of ical electrical and optical phenomena in moving systems, by H.A. Lorentz. ical.