http://agathe.gr/democracy/the_jury.html
The Jury The jurors for each trial were chosen from a large body of citizens available for jury duty for the period of one year. At the beginning of the year, each juror was given a bronze pinakion, a ... The pinakion would go into the appropriate tribal basket, which was labeled with the name of the juror's tribe. When it was time to allot jurors to courts, the magistrate would take the pinakia from the first tribal basket and put them into the first vertical row of slots in the machine, the pinakia from the second basket into the second row, and so on until he had placed all the pinakia into slots.
