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Electrostatic generator. A green glass ball mounted on a spindle with a crank in a wooden frame, with a cushion pressing against the bottom of the ball.
NB: The 1823 inventory of Copland's collection lists some glass globe generators like this one, but the provenance of this generator is unknown. It is certainly of an 18th century design so Copland would have had one very similar at least. While it…

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Elliptic bell with a handle. No clapper or evidence of one; most likely struck with a small hammer.
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