726 MAYAN CALENDAR SYSTEMS [ETH. ANN. 19 
is found to be 8 Kan, the same day as that below the column of black 
numerals, when the correction from 16 to 17 has been made. 
As this paper is designed in part as a help to those commencing the 
study of the codices and inscriptions, we will, like the surveyor who 
sights back and forth to insure accuracy, trace this series forward, 
a process which should, as a matter of course, result correctly if our 
count was right in tracing it backward. 
Starting with 3 Kan, the 17th day of the second month Uo, in the 
year 6 Lamat, we count forward to the end of this year 328 days, which, 
subtracted from 2,779, the remainder given above, leave 2,451 days 
to be counted. Dividing by 365, we obtain 6 years and an overplus 
of 261 days, or 13 months and 1 day. Counting forward on table 3 
6 years from the year 6 Lamat, we reach 12 Ezanab, the next year 
being 13 Akbal. Counting on table 1 the term of 13 months and 1 
day, beginning with the column headed 13, we reach the same 13, and 
opposite in the Akbal column find the day Akbal. The date is there- 
fore 13 Akbal, the Ist day of the fourteenth month—Kankin—of the 
year 13 Akbal, which proves the process to be correct. 
Our next example consists of the two series, same plate of the Dres- 
den codex, placed in the folds of the left serpent, as follows (pretixing 
Goodman’s names as before): 




Red Black | Difference 
Days 
Great cycles ------ 4 } 0 equals ---- 0 
Gycles-e2. fe tec: = | 6 6 0 equals. --- 0 
Keating sae a= | 11 7 3 equal_-_-: 21, 600 
Amauss Aees soso 10 12 ee equales=se 6, 480 
@huens2e eee ese if 4 | 2 equal.--.- 40 
Dayss-- cose oee 2 10) |/1:2) vequalss=== 12 
Days below .-.-.---- 3) bc 3 Cimi Total... 28, 132 
Monthseesee me = 7 Pax 14 Kayab | 




Subtracting from 28,132 one calendar round—18,980 days—leaves 
9,152 days. As it is somewhat easier to count forward than back- 
ward, though the other order appears really to be the one adopted here, 
we will begin with the date under the red column—3% Ix the 7th day 
of the sixteenth month (Pax) of the year 9 Lamat. As there remain 
58 days in this year after the date given, we subtract this number 
from 9,152 and divide the remainder by 365, and obtain 24 years and 
an overplus of 334 days, or 16 months and 14 days. Referring to 
table 3, we find that by counting forward 24 years from 9 Lamat, 
we reach 7 Lamat, the next year being 8 Ben. By table 1 we tind 
