When 1. p. f. to thcTear hath added heen 3 
Divide hy ip r 28, fifteen. 
The Remainders are the Numbers fought. And hereby we 
found them for the year i 66 8. in the former Example,, 
The ufe of the Prime is , to find the Efa& , and thereby the 
Moons Jge 0 Time of High Water , &c. 
A farther Ufe of the Sum Cycle is. to attain the DominicaU 
Letter, and. thereby to know the Day of the Week, on which any 
Day of any Month happens. But this is moreeafily and with 
iefs caution obtained, by finding, on what Day of' the Week the 
fir ft of March happens for ever, according to fuch Rules and Per-, 
fes 5 as I have elfewhere publifhed. 
In brief thus : 
To the Number — * — •— 2 a 
Add the Year ©f our Lord, fuppofe i 66 $< 
An its Even fourth part, neglecft - 1 
ing what remains, if any - — ~S 4 1 ?* 
The Sum- — r — — * 2o88.Divideby 7* noting 
the Remainder, which fhewes the Number of the Day of the 
Week, accounting Sunday fir ft. Ifo. remain, the firfl of March 
falls on a S aturday. In this Examplethere remains 2 i fhewing the 
firfl of March to fall on Munday a 
If it were required , to perform e_ this for years preceding our 
Saviours Nativity , then take this Rule?, 
To the Year adde its even fourth part, the Sum divide by 7, 
the Remainder fhewes the Day of the Week, accounting Sunday 
firft, Saturday fecond, and fo backward. 
PKOBLEME . 
’to find what day of the Month in the firft Week of each Months 
happens to he on the fame day of the Week, as the firft of March. 
Life the (plain) following Per fes, in which the 12. Words re- 
late to the 12* Months of the Year, accounting March the 
firftj 
Ask endlefs Comfort , God enough he ft ows , 
Rrtim Divine Axioms Faith confirmed grows, 
Ooo Thd 
