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Rare Book Division, The New York Public Library. "The source of imperfections in telescopes, and how one can attempt to remedy them (fig. LXIV) ; Hyperbolic, elliptical and parabolic figures of glass (figs. LXIV-LXV); Use of telescopes and microscopes (figs. LXVI-LXXII)." The New York Public Library Digital Collections. 1670. https://digitalcollections.nypl.org/items/510d47dd-f403-a3d9-e040-e00a18064a99
Rare Book Division, The New York Public Library. "The source of imperfections in telescopes, and how one can attempt to remedy them (fig. LXIV) ; Hyperbolic, elliptical and parabolic figures of glass (figs. LXIV-LXV); Use of telescopes and microscopes (figs. LXVI-LXXII)." New York Public Library Digital Collections. Accessed April 27, 2024. https://digitalcollections.nypl.org/items/510d47dd-f403-a3d9-e040-e00a18064a99
Rare Book Division, The New York Public Library. (1670). The source of imperfections in telescopes, and how one can attempt to remedy them (fig. LXIV) ; Hyperbolic, elliptical and parabolic figures of glass (figs. LXIV-LXV); Use of telescopes and microscopes (figs. LXVI-LXXII). Retrieved from https://digitalcollections.nypl.org/items/510d47dd-f403-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/510d47dd-f403-a3d9-e040-e00a18064a99 | title=
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The source of imperfections in telescopes, and how one can attempt to remedy them (fig. LXIV) ; Hyperbolic, elliptical and parabolic figures of glass (figs. LXIV-LXV); Use of telescopes and microscopes (figs. LXVI-LXXII)., (1670)
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