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Rare Book Division, The New York Public Library. "Construction of a clock that moves perpetually without ever needing to be wound up, and shows and sounds the hours with exact precision (fig. XVI)." The New York Public Library Digital Collections. 1670. https://digitalcollections.nypl.org/items/510d47dd-f3c8-a3d9-e040-e00a18064a99
Rare Book Division, The New York Public Library. "Construction of a clock that moves perpetually without ever needing to be wound up, and shows and sounds the hours with exact precision (fig. XVI)." New York Public Library Digital Collections. Accessed January 15, 2025. https://digitalcollections.nypl.org/items/510d47dd-f3c8-a3d9-e040-e00a18064a99
Rare Book Division, The New York Public Library. (1670). Construction of a clock that moves perpetually without ever needing to be wound up, and shows and sounds the hours with exact precision (fig. XVI). Retrieved from https://digitalcollections.nypl.org/items/510d47dd-f3c8-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/510d47dd-f3c8-a3d9-e040-e00a18064a99 | title=
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Construction of a clock that moves perpetually without ever needing to be wound up, and shows and sounds the hours with exact precision (fig. XVI)., (1670)
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