Show early adding machines that the ancient inca civilization in peru possessed PO assessed an adding and calculating machine hag bas been revealed in the recent discovery by ex cavatora of a anc tt d cord or in the ruins of a prehistoric tomb the cord Is sixteen yards long and contains knots divided into ten unequal sec tlona cheso knots represent tile the odd numbers from one to nineteen the sections are of different colors colon including red nid brown yellow pellow blue and green ereen and are separated ne by silver beads beadi which represent th theesen the eleven even numbers from two to twe twenty aty by using this simple way of counting based on the decimal system rapid calculi alo bloss can caa be wad nud |