German-born theoretical physicist <a href="https://en.wikipedia.org/wiki/Albert_Einstein" class="extiw" title="en:Albert Einstein">Albert Einstein</a>.
Lucien Chavan <sup id="cite_ref-author_1-1" class="reference"><a href="#cite_note-author-1">[1]</a></sup> (1868 - 1942), a friend of Einstein's when he was living in Berne.
1904<sup id="cite_ref-author_1-0" class="reference"><a href="#cite_note-author-1">[1]</a></sup> or 1905<sup id="cite_ref-histberne_2-0" class="reference"><a href="#cite_note-histberne-2">[2]</a></sup>
Cropped from original at the <a rel="nofollow" class="external text" href="http://www.alberteinstein.info">The Albert Einstein Archives, The Hebrew University of Jerusalem</a>.