MFR348311 Modern Replica of Napier\'s Bones (boxwood & walnut) by English School; Private Collection; (add.info.: created by Scottish mathematician John Napier (1550-1617); also known as Napier\'s rods; abacus comprised of ten strips of wood corresponding to digits 0 to 9; facilitating multiplication and division; Replica made by Harriet Wynter Ltd.;); English, out of copyright.