Following Thomas Young’s ideas, light was regarded in the 19th century to move as vibrations (undulations) in a substance called the Luminiferous aether, contrary to Newton’s ideas that light itself was made of substantive corpuscles.
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With Achille Delesse he was for many years editor of the Revue de géologie and contributed to the Extraits de géologie, and he joined with Alfred Potier in the geological surveys undertaken in connection with the Channel Tunnel proposals.