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A horse-drawn potato sprayer, which would have been used-- for example -- in spraying the bluestone used as a potato top killer. The spray would be poured into the wooden cask, and then forced out over the plants through approximately 8 nozzles. The spraying action was driven by a bicycle-style chain that attached the axle to the pumps, and the pressure would increase or decrease depending on how fast the horses were pulling. (Historical Society)

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