[ 4i8 ] 
whofe Date confifts of a Number of entire Hun- 
dreds not divifiblc by 4, fuch as 1700, 1800, 
1900, 2100, &c. to be only Common, and not 
Biffextile or Leap Years, as they would other- 
wife have been ; and confequently omitting the in- 
tercalary Days, which, according to the Julian Ac- 
count, fhould have been inferred in the Month of 
February- in thofe Years. Buc at the fame time they 
order’d that every fourth hundredth Year, confiding 
of a Number of entire Hundreds, divifible by 4, 
fuch as 1600, 2000, 2400, 2800, &c. fhould dill 
be confidered as Biffextile or Leap Years, and, of 
confequence, that one Day fhould be intercalated as 
ufual in thofe Yearjs. _ - " ’ 
This Correction, however, did not entirely remove 
the Error : For the Equinoxes and Solftices ftill anti- 
cipate i h , 53', 20" in every four hundred Gregorian 
Years. * 
But that Difference is fo inconfiderable as not to 
amount to twenty-four Hours, or to one whole Day, 
in Jcfs than 5082 Gregorian Years. 
Of the Lunar Year, Cycle of 19 Years, and 
the Epadt. 
* * i ‘ -> *:i c J d r t ~ 
The Space of Time betwixt one mean Conjunc- 
tion of the Moon with the Sun and the next follow- 
ing, or a mean Synodical Month , is equal to 29V 
1 z h , 44', 3", 2'", $ 6 lv y according to Mr. Found's 
Tables of mean Conjunctions. 
The Common Lunar Year confifts of 12 fuch 
Months. 
The 
