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Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "An analemma, shewing by inspection, the time of sun rising and sun setting, the lengths of days and nights, the beginning and end of twilight ..." The New York Public Library Digital Collections. 1786. https://digitalcollections.nypl.org/items/f2b72690-857c-0132-40ce-58d385a7b928
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "An analemma, shewing by inspection, the time of sun rising and sun setting, the lengths of days and nights, the beginning and end of twilight ..." New York Public Library Digital Collections. Accessed January 15, 2025. https://digitalcollections.nypl.org/items/f2b72690-857c-0132-40ce-58d385a7b928
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. (1786). An analemma, shewing by inspection, the time of sun rising and sun setting, the lengths of days and nights, the beginning and end of twilight ... Retrieved from https://digitalcollections.nypl.org/items/f2b72690-857c-0132-40ce-58d385a7b928
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(still image)
An analemma, shewing by inspection, the time of sun rising and sun setting, the lengths of days and nights, the beginning and end of twilight ..., (1786)|author=Digital Collections, The New York Public Library |accessdate=January 15, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>