EQUIPMENT CONSISTING OF A THREE-DIMENSIONAL CIRCULAR BOARD HAVING TWO SIDE-BY-SIDE SEMI-CIRCULAR RECESSED COMPARTMENTS WHICH ARE CENTRALLY DISPOSED AND WHICH ARE SEPARATED BY AN UPSTANDING PARTITION EXTENDING DIAMETRICALLY ACROSS THE BOARD, WITH SIX FURTHER RECESSED COMPARTMENTS BEING ARRANGED AROUND EACH CENTRAL SEMI-CIRCULAR COMPARTMENT ON EACH SIDE OF THE DIAMETRICAL PARTITION AND EACH BEING OF TRUNCATED SECTOR-SHAPED FORM, FORTY-FEIGHT IDENTICAL BEADS ALL OF WHICH ARE OF THE SAME COLOR,...