Hieroglyphics of Horapollo, tr. Alexander Turner Cory, [1840], at sacred-texts.com

IV. HOW A MONTH.

 1

To represent a month they delineate a PALM BRANCH, or, the MOON INVERTED.

p. 11

[paragraph continues] A palm branch for the reason before mentioned respecting the palm tree; and the moon inverted, because they say, that, in its increase, when it has come to fifteen degrees, 1 it appears in figure with its horns erect; and in its decrease, after having completed the number of thirty days, 2 it sets with its horns inverted.

Footnotes

10:1