<b>Summary</b>: Caucasus RR train below Tkvebulski curves.
<bdi><a href="https://en.wikipedia.org/wiki/en:Dmitri_Yermakov" class="extiw" title="w:en:Dmitri Yermakov"><span title="Russian photographer">Dmitri Yermakov</span></a>
</bdi>
circa 1890s <div style="display: none;">date QS:P,+1890-00-00T00:00:00Z/8</div>
<a rel="nofollow" class="external text" href="http://lcweb2.loc.gov/pnp/cph/3b10000/3b17000/3b17400/3b17425r.jpg">United States Library of Congress</a>