THOMAS] PLATE 51, DRESDEN CODEX (29 
by Mr Goodman until he has clearly proved not only that 13 cycles 
form a great cycle, but also that his arrangement of the chronologic 
system, which will be referred to further on, is correct. 
While the series of the codex which have been given as examples 
work out correctly, it must be admitted that there are others which 
can not be successfully traced without arbitrary corrections. Neyer- 
theless, those given, and others rising to the fifth order of units that 
might be noted, which give correct results, are sufficient to prove the 
rule. Before we leave the codex, reference will be made to some 
series with double numbers—that is, one series interpolated with 
another, one of which Dr Foérstemann is inclined to believe is a cor- 
rection of the other. In these cases the interpolated series, or sup- 
posed correction, is in red, the other in black. 
As an example, we take the following series from plate 51, using 
Goodman’s names: 

Black Red | Black Red 


a - Le = 
Wer@yclessee- oes 1 Be | 1 2 
IKatunpe see | 8 4 6 11 
ADAMS. Sates etc 4 15 11 10 
Wn@ boenseeese sees | 14 12 10 | 11 
Dayste cee tec S28 | 0 0 0 0 
Day below .--.---- | 12 Lamat 12 Lamat 

Subtracting the black of the right pair from the black of the left, 
we get the remainders 1, 13,4, 0; that is, 1 katun, 13 ahaus, + chuens, 0 
days, making 11,960 days. As no month number is given, we assume 
12 Lamat to be the first day (1 Pop) of the year 12 Lamat. Subtract- 
ing 364, the remaining days of this year, from 11,960, and dividing 
the remainder by 365, we obtain 31 years and an overplus of 281 days 
or 14 months and 1 day. By table 3 we ascertain that 31 years from 
12 Lamat bring us to + Akbal, the next year being 5 Lamat. By 
table 1 we ascertain that the first day of the fifteenth month is 12 
Lamat, the proper date. 
The difference between the red series of the two pairs is 13 katuns, 
5 ahaus, 1 chuen, 0 days, equal to 95,420 days. Subtracting from this 
5 calendar rounds (94,900 days) 520 days remain. Assuming 12 Lamat 
to be the first day of the year 12 Lamat, and subtracting 364, the 
remaining days of this year, from 520, we get 156 days or 7 months 
and 16 days, to be counted on the next year, which is 13 Ben. This 
reckoning reaches 12 Lamat, the sixteenth day of the month Mol. 
The result in both cases is correct, so far as the dates reached are con- 
cerned, but the interval between the black series is only 364 days+31 
