[ +33 ] 
ning of the next Period, bat muff keep their Places 
during another Period, if the foregoing Rules di- 
rect all the Golden Numbers to be advanced a Day ; 
which muft be complied with in refped to all the 
other Golden Numbers, except thofe fo fituated as 
above, lnftances whereof may be feen in the Table, 
under the relpe&ive Periods beginning with the Years 
1900, 2600, 3 100, and 3800. 
But if, in Conformity to the foregoing Rules, all 
the Golden Numbers are to be fet one Day back' 
ward; thofe Pairs or Angle Numbers, tho’ frtuated 
as is above-mentioned, muft not keep their Places, 
„ but muft move one Day backward like all the other 
Golden Numbers; as they may be feen to do in the 
Periods beginning with the Years 2400 and 3600. 
To give a plain and intelligible Account of rhe 
Realon, on which the Directions now given with 
refpedt to this Exception are founded, would extend 
this Paper, already too long, far beyond its due and 
proper Bounds. 1 fhall therefore content myfelf with 
obferving, that it depends chiefly upon the Nature 
of the Menfes Tleni and Menfes Cavi , into which 
the Lunar Year is ufually divided: and that, in order 
to make ufe of the Golden Numbers for finding the 
Time of the Gregorian Eajler , it will be ncccflary 
not only to conform to the general Rules laid 
down in the former Part of this Paper ; but alio to 
follow the Dire&ions juft now given, with refpcCt to 
the above-mentioned Exception to thofe general 
Rules. 
But I fhould not do Juftice to c Pett r E> avail, of 
the Middle Temple , Efq; Secretary of the Royal 
Society* 
