According to his own account, <a href="https://en.wikipedia.org/wiki/Otto_von_Guericke" id="mwNA" rel="mw:WikiLink" title="Otto von Guericke">Otto von Guericke</a> completes his book <i id="mwNQ">Experimenta Nova (ut vocantur) Magdeburgica de Vacuo Spatio</i>, detailing his experiments on vacuum and his discovery of <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Electrostatic_repulsion" id="mwNg" rel="mw:WikiLink" title="Electrostatic repulsion">electrostatic repulsion</a>.<sup about="#mwt33" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-4"}}' id="cite_ref-4" rel="dc:references" typeof="mw:Extension/ref"><a href="./March_14#cite_note-4" id="mwNw" style="counter-reset: mw-Ref 4;"><span class="mw-reflink-text" id="mwOA">[4]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-4"><cite about="#mwt30" class="citation book cs1" id="CITEREFOtto_von_Guericke2012">Otto von Guericke (6 December 2012). <a class="external text" href="https://books.google.com/books?id=a8voCAAAQBAJ&amp;pg=PR20" id="mwB3I" rel="mw:ExtLink nofollow"><i id="mwB3M">The New (So-Called) Magdeburg Experiments of Otto Von Guericke</i></a>. Springer Science &amp; Business Media. p.<span id="mwB3Q" typeof="mw:Entity"> </span>20. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwB3U" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwB3Y" typeof="mw:Entity"> </span><a href="./Special:BookSources/978-94-011-2010-4" id="mwB3c" rel="mw:WikiLink" title="Special:BookSources/978-94-011-2010-4"><bdi id="mwB3g">978-94-011-2010-4</bdi></a>.</cite><span about="#mwt30" class="Z3988" id="mwB3k" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+New+%28So-Called%29+Magdeburg+Experiments+of+Otto+Von+Guericke&amp;rft.pages=20&amp;rft.pub=Springer+Science+%26+Business+Media&amp;rft.date=2012-12-06&amp;rft.isbn=978-94-011-2010-4&amp;rft.au=Otto+von+Guericke&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3Da8voCAAAQBAJ%26pg%3DPR20&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMarch+14"></span></span>