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478 THE MATHEMATICAL PRINCIPLES [BOOK III, I The Comet's Dist. from sun. Longitude computed. Latitud. compu ted. Longitude observed. Latitude observed Dif Lo. Dif. Lat. Dec. 12 29 Feb. 5 Mar. 5 2792 8403 16669 21737 v? 63.32' X 13.131 8 17 .00' 29 .19? 8MSi 28. 00 15. 29f 12. 4 V55 6° 3U X 13 ,ll