Watt-type <a href="https://en.wikipedia.org/wiki/Centrifugal_governor" class="extiw" title="w:Centrifugal governor">centrifugal governor</a> (1788) on a <a href="//commons.wikimedia.org/w/index.php?title=Boulton_and_Watt&amp;action=edit&amp;redlink=1" class="new" title="Boulton and Watt (page does not exist)">Boulton and Watt</a> steam engine at the <a href="https://en.wikipedia.org/wiki/Science_Museum_(London)" class="extiw" title="w:Science Museum (London)">Science Museum</a>, London.
<a href="//commons.wikimedia.org/wiki/User:DrJunge" title="User:DrJunge">Dr. Mirko Junge</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>