What's the contraption being advertised here?

While vanilla was not yet in favor, 19th century Americans enjoyed a wide range of flavors from pineapple to pistachio. But there was just one way to make it correctly: constant, laborious cranking. As the 1824 cookbook The Virginia Housewife warned, only "indolent cooks" just dumped the ingredients in and tossed it "in the ice house".

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