On the Revolutions of the Heavenly Spheres

Having reviewed the printed work and compared it once more with the original manuscript, you will take care to correct the following. The first number refers to the folios, and the second to the lines. The dots added denote the sides of the leaves: one dot specifically for the first side [recto], two for the second [verso].

Folio 4, line 10, read posset original: "it might be able". 6, line 33, agitentur original: "they may be moved". 7, line 19, terrae original: "of the earth". 8 [verso], line 14, quiddam original: "something". 13 [verso], line 18, circulum original: "the circle". 20 [verso], line 12, quam original: "than". 22, line 7, If from the mark K. 22, line 20, double. 23, line 14, the right angle E. 23, line 15, where it has E, delete E. 23 [verso], line 9, for B I, read E I. 26, line 35, of the subtending double. 30, for K at the south pole original: "polo antarctico", replace with H, of the first figure. 30 [verso], line 30, for 19 replace with 29. 31 [verso], line 1, in the first of the differences for 55, 50, 45, 40, 35, 3, put 0 for each. 35 [verso], line 13, for perpendicular, put at right angles. 45 [verso], line 15, discovered. 50, line 29, minor. 50, line 35, for $1\frac{1}{2}$ read $0\frac{1}{2}$. 50 [verso], line 20, for $20\frac{1}{2}$ read $29\frac{1}{2}$. 51, line 17, for 5 read 3. 54 [verso], line 23, the greater should add. In the same place, line 25, for $269\frac{1}{2}$ read $169\frac{1}{2}$. 55, line 6, for $165\frac{1}{2}$ read $165\frac{1}{12}$. 55 [verso], line 16, for 124 read $327\frac{1}{6}$. 61, line 22, for $196\frac{1}{8}$ read $186\frac{1}{6}$. 61, line 32, for $41\frac{1}{3}$ read $40\frac{1}{3}$. 65, line 30, always by Albategnius, understand Muhammad of Arraqah Al-Battani, a 9th-century Arab astronomer whose observations Copernicus used to verify his theories. 66 [verso], line 35, is joined to the middle l. 72 [verso], line 26, for to which, read For here. These things which follow up to But since on folio 73, line 13, are to be moved to the end of the seventh chapter, and the rest consequently corrected thus: 72 [verso], line 33, for five-sixths of degrees dextantes: a Roman fraction meaning ten-twelfths or five-sixths, read 1 degree and a sixth. 72 [verso], line 34, for of one part and 40 minutes, read of two parts and 20 minutes scrupulus: literally a "scruple," used here for a minute of a degree. 73, line 9, for 50 minutes, read 70. 73, line 11, for 20 minutes, read 28. 73, line 13, for 20 minutes, read 28. 74, line 14, for 28, read 48. 75 [verso], line 1, exists. 77, line 9, for 101 days, read 106. 77, line 32, for 5 of the anomaly, read 55. 79, line 26, a quadrant. 84, line 29, read the Homocentrics A B C. 86 [verso], line 20, for E D B read E D F. 87 [verso], line 4, for part of the day, read in parts. 90, line 31, the places of the equinoctials. 91, in this figure join D I and O I with straight lines. 93 [verso], line 35, read joined together. 96 [verso], line 2, for are, read become. In the same place, line 10, for to pass through by motion, read to pass through by composite motion. 96, line 18, of the natural [days]. 100 [verso], line 11, for however and in F, read however in F. 101, line 31, to themselves. 102, line 8, for 168, read 148. In the same place, line 12, for in, read not. In the same place, line 22, they abound. 106, line 18, for 33, read 34. 107 [verso], line 21, for B C, C D, read B E, C E. In the same place, line 24, for E C read B C. 108 [verso], line 3, for 2 minutes, read 1. In the same place, line 33, read that which is under F. 109, line 4, for D F L, read D E L. In the same place, line 12, for G B C, read G C B. In the same place, line 24, for motion [motus], read place [locus]. In the same place, line 26, for 170, read 177. In the same place, line 29, of longitude and anomaly. 109 [verso], line 5, four [sixtieths] of one degree. 110, line 20, for 39, read 38. 111, in this figure let E M and E L be connected by straight lines. 116 [verso], line 18, for 11, read 16 of Scorpio. 117, line 6, for 56 minutes, read 55. 119, line 18, for however, read also. 119 [verso], line 12, read its [distance] from the zenith. 120, line 4, for 12, read 7. 121, line 19, for by which [masculine], read by which [feminine]. 121 [verso], line 13, the first at the minute. 122 [verso], line 22, read 1,000,000. In the same place, line 32, read 1,000,000. 123 [verso], line 24, 32 seconds of a minute. 124, line 27, for in the fifth of the difference, read the differences, by which. 125, in this figure the circumference R E was to be taken from the right. 127 [verso], line 17, read the Moon of likeness. In the same place, line 26, read D B E and taken. In the same place, line 33, read shorter angles. 128, line 25, for from the right A B, D A, read A B D from the right angle. 129, line 4, read at the end of the hour. 130 [verso], line 35, for hourly, read of the hours. 131 [verso], line 11, for there, read here. 134, line 17, read are found. 134 [verso], line 3, for 69, read 59. In the same place, line 19, read the minute of the day. In the same place, line 21, for 21, read 31. In the same place, line 32, for 4, read 40. 140 [verso], line 29, read in the deferent. In the same place, line 32, read but now in Mercury, it happens more. 141, line 30, read it will add to the middle. 142, in this figure for T, read R. 142 [verso], line 12, read yet with an imperceptible difference. In the same place, line 27, for it will be, read it was. 144 [verso], line 3, for 864, read 854. In the same place, line 18, for 26, read 36. 145, line 1, read it might arrive. 145 [verso], line 13, for 272, read 273. In the same place, line 7, for A D E, read A E D. In the same place, line 18, for 78, read 68. In the same place, line 25, for ei, read fi; for of the diameter, read the diameter. 146, line 30, read that which is under G D, D H, but that which is under G D. In the same place, line 36, for S T read F D.

BY NICOLAUS