MATHEMATICS
Problem XX.
To find on what day Easter will happen.
Find the age of the Moon on the 21st of March
in the given year; if it be 14 then find the day
of the week answering to it, and the Sunday
following is Easter Sunday; but if the Moon's
age on the 21st of March be not 14, then
reckon forward to the day on which the Moon's age
is 14, and find the day of the week answering to
that day, the Sunday following will be the day
required.
NB. On leap year take the 20th of March.
Example. When does Easter happen in the year 1786.
21 of March ny 44 31
29 Exact Take31= days in March 28
1 No. of the month 13th of April, the 31
51 day of the full moon 13th
subtract 30 or, Easter Limit. 7) 103
21 Moon's age 14-4'=
+23
car. up 44 No. of days to the Moon's
Add 23 being 14 days old.
Therefore, the 1st of Jan. being Sun.,
reckon forward 5 days including Sun.,
and you find the 13th of April falls on Thurs.
consequently the next Sun. is the 16th,= Easter Sun.