11 11
| 4 10 | 12 5 | 0 8_c_| 11 16_e_
| 4 13_a_| 12 5 | 0 8 | 11 11
Plate 48 | 4 10 | 12 5 | 8 | 11 11
| 4 5 | 12 10 | 0 8 | 11 11
| 4 10 | 12 5 | 0 8 | 11 16
Plate 49 | 4 10 | 12 5 | 0 8 | 11 16
| 4 10 | 12 5 | 0 8 | 11 16
| 4 10 | 12 5 | 0 8 | 11 11
Plate 50 | 4 10 | 12 5 | 0 8 | 11 11
| 4 5 | 12 10 | 0 8 | 11 10
| 4 10 | 12 5 | 0 8 | 12 11_g_
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Although it is apparent that the variations from the intervals of the
black numeral and day series above them are too numerous and too uniform
to be considered mistakes, yet there is little reason to doubt that these
month numbers are connected with and depend upon the day series given in
the columns above.

That there are some errors is quite clear; for instance, the variation at
_a_ arises from the fact that Dr. Foerstemann gives the date here as 10
months, 10 days, whereas the codex has it 10 months, 13 days. Making this
correction the interval will be 4 months, 10 days. The correction will
make the interval at _d_ 9, 11, instead of 9, 8. Still there is a
variation of two months from the usual interval, which, if corrected on
the supposition that Dr. Foerstemann has mistaken the month, would
necessitate a change of the remainder of the series given in this line.
The interval at _c_, according to the figure given by Dr. Foerstemann,
would be retrograde, that is, minus 12. This arises from the fact that he
gives the last date in the middle line on Plate 47 as 2 months, 6 days,
whereas the symbol is very distinctly that of the third month, and the
eight day series is unbroken if this correction is made.

When these evident errors are corrected the series of intervals show
very clearly a system and periodicity depending on the day column series
in the upper part of the pages. In the first column (Table V) the
interval is usually 4 months, 10 days, precisely the same as between the
first and second day columns, but occasionally it is 4 months, 5 days,
which will still bring it to one of