Physicist <a href="https://en.wikipedia.org/wiki/Augustin-Jean_Fresnel" id="mwSA" rel="mw:WikiLink" title="Augustin-Jean Fresnel">Augustin Fresnel</a> reads a memoir on <a href="https://en.wikipedia.org/wiki/Optical_rotation" id="mwSQ" rel="mw:WikiLink" title="Optical rotation">optical rotation</a> to the <a href="https://en.wikipedia.org/wiki/French_Academy_of_Sciences" id="mwSg" rel="mw:WikiLink" title="French Academy of Sciences">French Academy of Sciences</a>, reporting that when polarized light is "depolarized" by a <a href="https://en.wikipedia.org/wiki/Fresnel_rhomb" id="mwSw" rel="mw:WikiLink" title="Fresnel rhomb">Fresnel rhomb</a>, its properties are preserved in any subsequent passage through an optically-rotating crystal or liquid.<sup about="#mwt41" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-6"}}' id="cite_ref-6" rel="dc:references" typeof="mw:Extension/ref"><a href="./March_30#cite_note-6" id="mwTA" style="counter-reset: mw-Ref 6;"><span class="mw-reflink-text" id="mwTQ">[6]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-6">A. Fresnel, "Mémoire sur les couleurs développées dans les fluides homogènes par la lumière polarisée" ("Memoir on colors developed in homogeneous fluids by polarized light"), read 30<span id="mwBxQ" typeof="mw:Entity"> </span>March 1818; printed in A.<span id="mwBxU" typeof="mw:Entity"> </span>Fresnel (ed.<span about="#mwt37" data-mw='{"parts":[{"template":{"target":{"wt":"tsp","href":"./Template:Tsp"},"params":{},"i":0}}]}' id="mwBxY" style="white-space: nowrap;" typeof="mw:Transclusion"><span id="mwBxc" typeof="mw:Entity"> </span></span> H. de Senarmont, E.<span id="mwBxg" typeof="mw:Entity"> </span>Verdet, and L.<span id="mwBxk" typeof="mw:Entity"> </span>Fresnel), <i id="mwBxo">Oeuvres complètes d'Augustin Fresnel</i>, Paris: Imprimerie Impériale, <a class="external text" href="https://books.google.com/books?id=1l0_AAAAcAAJ" id="mwBxs" rel="mw:ExtLink nofollow">vol.<span about="#mwt40" data-mw='{"parts":[{"template":{"target":{"wt":"tsp","href":"./Template:Tsp"},"params":{},"i":0}}]}' id="mwBxw" style="white-space: nowrap;" typeof="mw:Transclusion"><span id="mwBx0" typeof="mw:Entity"> </span></span>1</a>, 1866, pp.<span about="#mwt38" data-mw='{"parts":[{"template":{"target":{"wt":"tsp","href":"./Template:Tsp"},"params":{},"i":0}}]}' id="mwBx4" style="white-space: nowrap;" typeof="mw:Transclusion"><span id="mwBx8" typeof="mw:Entity"> </span></span>655–83, at pp.<span about="#mwt39" data-mw='{"parts":[{"template":{"target":{"wt":"tsp","href":"./Template:Tsp"},"params":{},"i":0}}]}' id="mwByA" style="white-space: nowrap;" typeof="mw:Transclusion"><span id="mwByE" typeof="mw:Entity"> </span></span>659–60.</span>