<a href="https://en.wikipedia.org/wiki/Antonie_van_Leeuwenhoek" id="mwTQ" rel="mw:WikiLink" title="Antonie van Leeuwenhoek">Antonie van Leeuwenhoek</a> writes a letter to the Royal Society describing "<a href="https://en.wikipedia.org/wiki/Animalcule" id="mwTg" rel="mw:WikiLink" title="Animalcule">animalcules</a>", later known as <a href="https://en.wikipedia.org/wiki/Protozoa" id="mwTw" rel="mw:WikiLink" title="Protozoa">protozoa</a>.<sup about="#mwt39" 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="./September_17#cite_note-6" id="mwUA" style="counter-reset: mw-Ref 6;"><span class="mw-reflink-text" id="mwUQ">[6]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-6"><cite about="#mwt36" class="citation web cs1" id="CITEREFAnderson">Anderson, Douglas. <a class="external text" href="https://web.archive.org/web/20160820153516/http://lensonleeuwenhoek.net/content/wrote-letter-39-1683-09-17-ab-76-francis-aston" id="mwCFM" rel="mw:ExtLink nofollow">"Wrote Letter 39 of 1683-09-17 (AB 76) to Francis Aston"</a>. <i id="mwCFQ">Lens on Leeuwenhoek</i>. Archived from <a class="external text" href="http://lensonleeuwenhoek.net/content/wrote-letter-39-1683-09-17-ab-76-francis-aston" id="mwCFU" rel="mw:ExtLink nofollow">the original</a> on 2016-08-20<span class="reference-accessdate" id="mwCFY">. Retrieved <span class="nowrap" id="mwCFc">2016-09-26</span></span>.</cite><span about="#mwt36" class="Z3988" id="mwCFg" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=Lens+on+Leeuwenhoek&amp;rft.atitle=Wrote+Letter+39+of+1683-09-17+%28AB+76%29+to+Francis+Aston&amp;rft.aulast=Anderson&amp;rft.aufirst=Douglas&amp;rft_id=http%3A%2F%2Flensonleeuwenhoek.net%2Fcontent%2Fwrote-letter-39-1683-09-17-ab-76-francis-aston&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ASeptember+17"></span></span>