 In 1856 Jules Jamin began working on, and completed his well known instrument, the Jamin interferometer.In 1858 he was awarded the Rumford Medal, from the Royal Society, for his work on light and in 1863 he became a professor at the Faculty of Paris, succeeding César Despretz as the associate chair of experimental physics.Based on his lectures at the École Polytechnique, he published a compelling paper titled "General essay on Physics".