BLACK BALL
In most traditional secret societies in the western world, candidates for initiation are elected to membership by a secret ballot of current members of the lodge where their application has been received. The usual method involves a wooden ballot box with a tray of white and black marbles. One at a time, members advance to the box, pick up a marble and drop it in. White marbles are favourable votes, black marbles unfavourable. In the stricter lodges, one negative vote is enough to bar a candidate from membership, while some American fraternal orders now require a majority of negative votes to exclude a potential member. See fraternal orders; lodge.
The custom of voting in members with black and white balls was widespread enough that it gave rise to the verb “to blackball,” meaning to ostracize someone or block their membership in an organization.
SOURCE:
The Element Encyclopedia of Secret Societies : the ultimate a-z of ancient mysteries, lost civilizations and forgotten wisdom written by John Michael Greer – © John Michael Greer 2006