Iron balls on the Centrifugal governor mechanism of a traction engine - used to control the speed of the engine.
Schlüsselwörter
governor,
steam,
old,
engine,
victorian,
mechanical,
engineering,
speed control,
locomotive,
agricultural,
machinery,
machine,
boiler,
1788,
britain,
britain,
bygone,
old-fashioned,
old-fashioned,
past,
red,
past,
traditional,
tradition,
vehicle,
vehicle
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