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Show Early Adding Machines That the ancient Inca civilization In Peru possessed an adding and calculating calcu-lating machine has been revealed In the recent discovery by excavators of a knottvd cord, or "qulpi," in the ruins of a prehistoric tonb. The cord is sixteen yards long aim contains KJ knots. Divided into ten unequal sections sec-tions these knots represent tire odd numbers from one to nineteen. The sections are of different coioi, including includ-ing red, brown, yellow, Mue and green, and are separated by silver beads, which represent tli even numbers num-bers from two to twenty. By using this simple way of counting, based on the decimal system, rapid calcula- j tlons can be made. Montreal SLur. I |