SYSTEMS OF ASTRONOMY, 221 



These corrections appear to have been introduced 

 about 245 years ago ; therefore let us try how far 

 they will agree with our formula, page 215. Let 

 the time at which they were introduced, be sup- 

 posed the end of the year 46'60 of the Call Vug, or 

 4. D. 1559. Then substituting 4G0O for ;Mn the 

 formula, we shall have the mean annual motions 

 requisite to give the places of the planets at that 

 time, agreeing with European tables as follow : — • 



Sun, 1 00 00 00 



Moox, 13 4 12 46 40,613 ^--^'V 



ViNUS, 1 7 15 11 23,635 + 



Mars, 6 11 24 19,150— ^^^^ 



Jupiter, 1 00 20 50,483 + -^^ 



Saturn, 12 13 09,343— i 



+ 660 



5 4 C'' 



i I) 



The corrections, on account of the inequalities In 

 the motions of the Moon, Juuiter, and Saturn, 

 being at this period inconsiderable, they are ac- 

 cordingly neglected, as of no consequence : there- 

 fore the above quantities being reduced and com- 

 pared with the motions jn the modern tables, we 

 shall have 



From computation. IVIodern H/?idii tables. 



r. s. ° ' " r. s. " ' " 



Sun, 10 00 00 00,00 1 00 00 00.00 



Moon, 13 4 12 46 40,70 13 4 12 46 40,80 



Ve.vus, 1 7 15 U 48,92 1 7 15 11 49,20 



Mars, 6 1 1 24 09,81 6 11 24 09,60 



Jupiter, 1 00 21 03,65 1 00 21 03,60 



Satuhn, 12 12 53,13 12" 12 54,00 



The agreement between which is sufficiently ob- 

 vious. Let tuc motions above found be now mul- 



