What are axones?

Some articles on axones:

Solon's Reforms
... These axones appear to have operated on the same principle as a Lazy Susan, allowing both convenient storage and ease of access ... Originally the axones recorded laws enacted by Draco in the late 7th Century (traditionally 621 BC) ... Fragments of the axones were still visible in Plutarch's time but today the only records we have of Solon's laws are fragmentary quotes and comments in literary sources such as ...