Smithsonian Report, 1948.—Spinden PLATE 7 
THE NATIONAL STONE FOUND IN MEXICO CITY 
This may illustrate how the Calendar Stone was set up. The Olin sign in the center of this and other 
Aztec suns represents a year dial: Olin means movement. One rabbit and two reeds are the years A. D. 
1507 and 1508. 
