FIGURE 4. The glyphs.
From the following article:
Calendars with Olympiad display and eclipse prediction on the Antikythera Mechanism
Tony Freeth, Alexander Jones, John M. Steele & Yanis Bitsakis
Nature 454, 614-617(31 July 2008)
doi:10.1038/nature07130
A selection of the 18 known eclipse prediction glyphs (Supplementary Notes 4). Left, the raw data; X-ray CT for glyphs 20, 25, 26 and 131, and polynomial texture mapping for glyph 178. Right, the text traced in red. Most of the glyph symbols were previously decoded6.
, ELHNH (Moon); H, H
IO (Sun); H\M, HMEPA
(of the day); 
\P, P
(hour) and the text that follows
is the eclipse time in hours. Here we add
N\
, N
KTO
(of the night), as seen in glyph 131, and the identification of index letters at the bottom of each glyph in alphabetical order. In the consecutive glyphs 20, 25 and 26 the index letters E, Z and H can be seen. (Z is always written on the Mechanism as an I with long serifs.) Some of the glyphs have unexplained bars over the index letter, as in glyphs 131 and 178. The index letters have profound consequences for the design of the glyph sequence.
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