442 Remarks on Ancient Eclipses, 



Corr. 

 A.D. 5a»eof Equated Time. Eclip. 



Eclipses. Days. D. H. D. H. A.C. 



1443 1) Dec. 7 6M.+6 Dec. 13 6 .M. 12 10 21 3S2 

 1461 O July 7 10 M. + 6 July 13 10 M. 12 23 51 364 

 1468 ]) Aug. 4 2M. + 6 Aug. 10 2 M. 357 



1485 O Sept. 9 2M,+6 Sept. 15 2 M. 14 18 340 

 1494 5 Sept. 14 19 45 + 6 Sept. 20 19 45 20 20 29 331 

 1515 ©Aug. 9 9 A. + 'o Aug. 15 9 A. 14 20 5 310 



From these examples it appears that the assumed equation 

 above given very nearly reducis the dates to the same day, and 

 time of the day within a few hours, although it must be remarked 

 the distance of time is no less than 1824 years. To proceed on 

 any nicer calculation would be prolix, but not unprofitable in a 

 work devoted to the subject of the lunar astronomy. 



Again : If you add to the above equated dates the Julian equa- 

 tion, these equated dates will correspond with the equated dates 

 of those eclipses whicii happened for seven himdred years before 

 the Christian sera, and the result will amount to the same mea- 

 sure of time, or very nearly : 1 shall produce an example of this 

 sort. 



D. H. M. D. H. M. 



^^''' Christ! ^^^ DSept.20 20 29 A.D. 1494 ]) Sept. 14 19 45 

 Equation +336 -f 6 



Sept. 20 19 45 

 + 336 



Sept. 23 22 51 



Eq. time 23 23 35 Eq. time 23 23 35 



(2.)* Eclipse A.C. 331 Table time Sept. 20 20 29 



Eclipse A.D. 1494 Table time Sept. 14 19 45 



Equation +600 



Sept. 20 19 45 



(3.) Eclipse A.C. 331 Equated time Sept. 23 23 35 



Eclipse A.D. 1494 Equated time Sept. 23 22 51 



Diff. ~ii 



Having now produced the principles lipon which the eclipse* 

 of the ancients may be verified without the tedious method of 

 calculation by tables and anomalies, and reduced their dates by a 

 most simple method to a common standard, agreeing with mo- 

 dern observations, I proceed on ether remarks. 



The year A.D. 1801 appears to have been remarkable for the 

 places of the sun and moon in the autumnal equinox, and an 



epoch 



