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Knife-Sharpening Machine

Knife-grinder of Caen using a dog to power his machine. Dog walks round and round the wheel. 1882.
Knife-grinder of Caen using a dog to power his machine. Dog walks round and round the wheel. 1882. Image: Thomas Crane / Culture Club (Getty Images)

Another common dog-powered machine of the 19th century included knife-sharpening, something that wouldn’t necessarily be seen as very cruel given the relatively limited amount of time required to get the job done.

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