RULE S
 

                                        FOR THE



COKVEUBIAN OF THE OLYMPIADS AND THE YEARS OF ROME (A (J.C  INTO YEARS

                    BEFORE AND AFTER THE BIRTH OF  CHRIST.



  The Olympiads commenced in the year 3938 of the Julian period, or B.C. 776   Each Olym

piad contains 4 years.   The year of Rome commenced B.C. 753.

  To ascertain the years before or after Christ of any Olympiad, take the number of Olympiads

actually completed, multiply that number by 4, and if tho product be less than 776, subtract that

product from 776; the remainder will be the years before  Christ.   If the product be more than

776, subtract 776 from that product, and the remainder  will be the years after Christ.

  We thus obtain the year before or after Christ of the last complete Olympiad: we must now

include the single years of the current Olympiad.   To put down these correctly—if before Christ,

subtract the last completed year (viz., the number 1, 2, or  3 immediately preceding); if after Christ,

add the current year; the product will be the year before  or after  Christ, corresponding  to the

current year of the current Olympiad.

  For Example :  Let the  3d year of the 87th Olympiad bo  the year to be converted.   Tho num¬

ber of Olympiads  actually completed is 86 ;  multiply that number by  4, and the total will bo 344

Subtract this number (being less than  776) from 776, and  the remainder will be 432;  subtraot

further the last completed year of the current Olympiad  (viz., 2), and the year 430 before  Christ

will be the corresponding year.

  Suppose it were the 2d year of the 248th Olympiad.  Multiply 247, the number of Olympiads

actually completed, by 4, and the total will be 988; as that number is larger than 776, deduct 776

from 988, and the remainder,  212, will be the year ofthe last complete Olympiad : add 2 for the

current year of the current Olympiad, and 214 after Christ  (A.D. 214) will be the corresponding

vear.

  To find the year before or after Christ which corresponds to any given ^ear of the Building ol

Rome,  add 1 year (for the current year) to 753, and from the total,  754, subtract the  given year

of Rome; the remainder will be the corresponding year before Christ.  If the given year of Rome

exceed 753, subtract 753 from the given number, and the remainder will be the corresponding

year after Christ.

   For Example :  Csesar invaded Britain in the year of Rome 699.  Deduct 699 from 754, and

that event is seen to correspond with the year B.C. 55.   The Romans finally left Britain in tks

year of Rome  1179.   Subtract 753 from  1179, and the remainder,  426, will be the year of oai

Lord in which that event took place.

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