<i>Title:</i> Demonstration of safety control device for railroad crossing before members of Congress at the Capitol today
<i>Abstract/medium:</i> 1 photographic print : gelatin silver.
National Photo Company Collection
1920
<p>Library of Congress
</p>
<ul><li><i>Catalog:</i> <a rel="nofollow" class="external free" href="https://lccn.loc.gov/91785783">https://lccn.loc.gov/91785783</a></li>
<li><i>Image download:</i> <a rel="nofollow" class="external free" href="https://cdn.loc.gov/service/pnp/cph/3b40000/3b42000/3b42000/3b42053r.jpg">https://cdn.loc.gov/service/pnp/cph/3b40000/3b42000/3b42000/3b42053r.jpg</a></li>
<li><i>Original url:</i> <a rel="nofollow" class="external free" href="https://www.loc.gov/pictures/item/91785783/">https://www.loc.gov/pictures/item/91785783/</a></li></ul>