https://collections.carlos.emory.edu/internal/media/dispatcher/32850/fullSingle-Strand Khipu (Knot-Writing Device)ca. 1508-1652 CE78 in. (198.1 cm)Plant fibers (furcraea andina)Ex coll. C. Clay and Virginia Aldridge2002.001.0400The single strand from a khipu measures approximately 2-3mm in diameter and is constructed from a 2-ply bundled cord, which is wrapped with an additional bundled cord, which includes occasional blue fibers. Small samples of these blue fibers were examined using a polarizing light microscope and characterized as animal fibers, perhaps wool or camelid. The deteriorated condition of the scale pattern prevented identification of the species. Small samples from the bundled cord and wrapping fibers were identified by microscopy techniques as <i>Furcraea andina</i>. A small sample of the cord fiber was analyzed by accelerator mass spectrometry (AMS) and stable isotope ratio analysis at the University of Georgia Center for Applied Isotope Studies. The resulting radiocarbon (C-14) calibrated date is between 1508-1652 CE.Art of the Americas5472959311