
Built around 1930, this gigantic machine was designed to burn the surface of black soil roads (impassable after rain) to create a 5 inch thick (125 mm) ceramic surface. From memory I think the plaque said that it operated at just 24 feet (7 m) per hour, 24 hours per day. I guess they must have had plenty of time on their hands; think of the fuel that would have had to have been gathered just to keep the burner running.
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Presumably wood burning so there would have been plenty of that around then. Is that wood logs underneath the vehicle? Wouldn’t they have caught fire?