Tracked Vehicles, a Maine invention



Boiler - fenced off due to some asbestos



Front runners

Track drive system



The track

Engine

Near the Cunliffe Depot Campsite is the graveyard for two Lombard loghaulers.  Invented by a Mainer, these were the first patented tracked vehicles.  They apparently put the earlier mentioned trains and tramways out of business since they could work all winter pulling sled trains of logs.  These are the forerunners of tracked vehicles including trucks, tanks and snowmobiles.
More info here: http://en.wikipedia.org/wiki/Lombard_Steam_Log_Hauler