An abandoned two-cylinder, 75 HP Bruce-Meriam-Abbott engine, manufactured around 1907 and used to power a pneumatic drill for mining. Near Lutz Tunnel in Lutz Canyon, Huachuca Mountains, Arizona.
<a href="//commons.wikimedia.org/wiki/User:StellarD" title="User:StellarD">StellarD</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>