These two handwritten Latin pages from Copernicus' famous De Revolutionibus 15431974 are from Book IV in which he analyzes lunar eclipses in terms of the relative precession of the moon due to the Earth's orbit around the sun. Appendix B give a translation of the text.
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copernicus-1
Figure 7 Copernicus' Manuscript |  |
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copernicus-2
Figure 8 Copernicus' Manuscript |  |