1817

1817 is a year in the 19th century.

Events

 * Augustin-Jean Fresnel and François Arago begin their experiments on polarisation.
 * Friedrich Stromeyer discovers Cadmimum.
 * British physicist David Brewster patents the Kaleidoscope.
 * Johann Arfvedson discovers Lithium.
 * Jöns Berzelius discovers Selenium.