Headlights

http://www.google.com/patents/US214422

Wisconsin’s Lorenzo Macauley patented this “improvement in road-lanterns” in 1879, presumably after testing it himself.

A lantern thus attached to a horse’s head enables both horse and driver to see the condition of the track and the objects in it much more plainly and at greater distance than when a lantern is placed on the carriage.

Fair enough.