317 
of three periodical series ; namely^ of the thirty 
or thirty-one days of the month, of the seven 
days of the week, and of the ten days of the 
decade. To dissipate entirely every doubt, that 
may remain respecting the chronological system 
of the Mexicans, we shall here add a table, which 
unites the divisions of the ritual and civil calen- 
dars, and their correspondence with the Grego- 
rian calendar. 
