THOMAS.] SERIES l)X PLATES 63 AND <>^- 329 



Years. Months. Days. 



3 9 14 Over seventh column, middle division. 



4 11 



3 14 T) Over sixth column, middle division. 



4 tl 



4 16 Over tifth column, middle division. 

 4 11 



4 5 7 Over fourth column, middle division. 



4 11 



4 9 18 Over third column, middle division. 



4 11 



4 14 9 Over second column, middle division. 



4 11 



.") 1 Over first column, middle division. 



The red uumerals over the first column of the middle division, ex- 

 cept the lowest diamond shaped one. are omitted, as thev do not ap- 

 pear to belong to the series. 



It must be borne in mind that the 4 months and 11 days form the 

 common difference between the corresponding days of the columns 

 counting from right to left: that is to say, counting 4 months and 11 

 days from the top day of any column will bring us to the first or 

 top day of the next column to the left. The interval between the 

 other corresponding days of the columns is also the same if the same 

 week numbers are assigned them. 



This question arises here. Does the difference include the time em- 

 braced in the entire column h That is to say. Is this interval of 4 months 

 and 11 days (referring, for example, to the tenth and ninth columns 

 of the lower division, our table) the sum of the intervals between 

 8 Cib and Men; Men and Chicchan; Chicchan and Caban; Caban 

 and 13 Ix. and 13 Ix of the tenth column and 3 Manik of the ninth 

 column!-' If not, the columns do not form a continuous series oi' must 

 be taken in some other order. 



Although Dr. Forstemann discovered the (jrder in which the series 

 as a whole was to be read,- and also the common difi^erence — given, as 

 is his custom, in days — he failed to furnish further explanation of 

 the group. 



In answer to the question presented I call attention to the follow- 

 ing facts: 



Commencing again with the uppermost day, 3 Cib, of the tenth 

 column, lowest division, and c(junting on the calendar to 13 Ix of 

 the same year, the interval is found to be 10 months and 18 days, 

 which is much more than the interval between 3 Cib and 3 Manik 

 (first of the ninth column), and of course cannot be included in it. 



Reversing the order in reading the columns, but counting forward 



