112 



CHRONOLOGY. 



Divide the given yew by 1 9 and call the rem. a 



. the given yew by 4 . ti 



.... the gien year by 7 c 



.... the number (19a+ A) . . SO d 



.... thenumber(2*.f4c+6</+B) 7 



Then the day of Easier will be 22 +d+c of March. 



or d+e9 of April. 



Thit rule it general for the Julian calendar, and has 

 only two exception* in the Gregorian calendar. 



I. If the day of Easter, found by the rule, is the 26th 

 of April, always make it the 19th of April. 



II. If the day of Eatlcr, found by the rule, is the 

 25th of April, always make it the 18th of April. 



Kramplc. Let it be required to find the day of Ea- 

 tcr, according to the Gregorian calendar, for LSI:;. It 

 appears from the Table, that in this year A=23. and ^ 

 B=4, then we have 



1813 divided by If) leaves a remainder =8=a 



1813 ...... 4 .......... =1=6 



1813 ...... 7 .......... =0=c 



(19<J + A) = 175 . 30 .......... =25=rf 



(24+4c+6<f+B) = 156 7 .......... =2=<- 



Hence 22-f-rf+r-=49th March, which is impossible. 

 But d^ -- 9=18th April, the day of Easter required 



ChronoU- 

 Kf> M.tilie- 



TABLE oflhc Reciprocal Values of the principal Periods tchich are employed in Chronology. 



Seconds. 



rhrono- 



Historical Chronology. 



CHAP. II. those historical documents, which are used for the pur- Historical 



pose of establishing the existence of events, and the order Chrono- 

 in which they happened, such as Eclipses, Public Re- '"W- 

 gisters, Medals, Columns, Obelisks, Pyramids, Marbles, 

 and Inscriptions. As many of these subjects, however, 



HISTORICAL Chroiology is that branch of the science are treated under more appropriate heads than that of 

 which treats of the straa and epochs fixed upon by different Chronology, we shall confine ourselves at present to the 

 nations for determining the order of dates and of facts in subject of JE,n, Epochs, and Eclipses, as belonging 

 """^ annals ; or in a more extensive ense, it treU of til more strictly to the present subject, 



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