<SPAN name="ap-1" id="ap-1">Appendix I.</SPAN></h1>
<h2>List of Dates.</h2>
<ol class="list-of-dates">
<li>Johann Kepler, born 1571;</li>
<li>school at Maulbronn, 1586;</li>
<li>University of Tübingen, 1589;</li>
<li>M.A. of Tübingen, 1591;</li>
<li>Professor at Gratz, 1594;</li>
<li>“Prodromus,” with “Mysterium Cosmographicum,” published 1596;</li>
<li>first marriage, 1597;</li>
<li>joins Tycho Brahe at Prague, 1600;</li>
<li>death of Tycho, 1601;</li>
<li>Kepler’s optics, 1603;</li>
<li>Nova, 1604;</li>
<li>on Comets, 1607;</li>
<li>Commentary on Mars, including First and Second Laws, 1609;</li>
<li>Professor at Linz, 1612;</li>
<li>second marriage, 1613;</li>
<li>Third Law discovered, 1618;</li>
<li>Epitome of Copernican Astronomy, 1618-1621;</li>
<li>Rudolphine Tables published, 1627;</li>
<li>died, 1630.</li>
</ol>
<h1>
