he period becomes 6940 and in the latter 6939. The mean length of
the cycle is therefore 69393/4 days, agreeing exactly with nineteen Julian
years.

Table I.--_Dominical Letters._

+---------------------+-----------+-----------+-----------+-----------+
| | | | | |
|Years of the Century.|(X/4)_r = 1|(X/4)_r = 2|(X/4)_r = 3|(X/4)_r = 0|
| | | | | |
+---------------------+-----------+-----------+-----------+-----------+
| 0 | C | E | G | B,A |
+---------------------+-----------+-----------+-----------+-----------+
| 1 29 57 85 | B | D | F | G |
| 2 30 58 86 | A | C | E | F |
| 3 31 59 87 | G | B | D | E |
| 4 32 60 88 | F,E | A,G | C,B | D,C |
+---------------------+-----------+-----------+-----------+-----------+
| 5 33 61 89 | D | F | A | B |
| 6 34 62 90 | C | E | G | A |
| 7 35 63 91 | B | D | F | G |
| 8 36 64 92 | A,G | C,B | E,D | F,E |
+---------------------+-----------+-----------+-----------+-----------+
| 9 37 65 93 | F | A | C | D |
| 10 38 66 94 | E | G | B | C |
| 11 39 67 95 | D | F | A | B |
| 12 40 68 96 | C,B | E,D | G,F | A,G |
+---------------------+-----------+-----------+-----------+-----------+
| 13 41 69 97 | A | C | E | F |
| 14 42 70 98 | G | B | D | E |
| 15 43 71 99 | F | A | C | D |
| 16 44 72 | E,D | G,F | B,A | C,B |
+---------------------+-----------+-----------+-----------+-----------+
| 17 45 73 | C | E | G | A |
| 18 46 74 | B | D | F | G |
| 19 47 75 | A | C | E | F |
| 20 48 76 | G,F |