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Show I Early Adding Machines I That the ancient Inca civilization In Peru possessed an adding and calcu- i latlng machine has been revealed In the recent discovery by excavators of a knotted cord, or "quipl," In the niins of a prehistoric tomb. The cord Is sixteen yards long ano contains 100 knots. Divided into ten unequal sections sec-tions these knots represent the odd numbers from one to nineteen. The sections are of different color, including includ-ing red, brown, yellow, blue and green, and are separated by silver beads', which represent the even numbers num-bers from twa to twenty. By using 1 this simple way of counting, based i on ihe decimal system, rapid cafcula-t cafcula-t tlons can be mad. lluntraal Star. |