tequixquitl (Mdz29r)
This element has been carved from the compound sign for the place name, Tequixquiac (perhaps, "At the Salty Water"). It comprises two rounded and scalloped orange figures with dots. This may be hail.
Stephanie Wood
These may be pieces of saltpeter. Alonso de Molina gives salitre.
Stephanie Wood
c. 1541, but by 1553 at the latest
Stephanie Wood
hard like stones, snow, hail, ice

tequixqui(tl), saltpeter, https://nahuatl.wired-humanities.org/content/tequizqui
cosa empedernida, o que se toma como piedra
Alonso de Molina
Codex Mendoza, folio 29 recto, https://digital.bodleian.ox.ac.uk/objects/2fea788e-2aa2-4f08-b6d9-648c00..., image 68 of 188.
The Bodleian Libraries, University of Oxford, hold the original manuscript, the MS. Arch. Selden. A. 1. This image is published here under the UK Creative Commons, “Attribution-NonCommercial-ShareAlike 3.0 License” (CC-BY-NC-SA 3.0).