Headbolt Heaters and Mobility in Minnesota

As winter approaches, a tip of the hat to Andrew Freeman, inventor of the headbolt heater.

If you've been in North Dakota, Minnesota, or Montana, you may have noticed that most cars, pickups, SUVs have an electrical cord coming out somewhere between the headlights.

We don't have electric cars up here, not as a rule, at any rate.

Those cords are for headbolt heaters: Wikipedia thinks they're called block heaters.