Show tree rings to fix date of remote civilization reports of success have been made from alie national geographic socie tys expedition into the south nest which Is endeavoring to fix the date definitely of a remote alon which undoubtedly existed athla Is being done by a study of the tree rings as found in some timbers of the ancient structures this work will enable the to date the period when the complex and highly developed civilization of chaco can yon produced the beautiful village pueblo bonato a communal dwell ing of some 2500 people centuries before the white man set foot on american soil the mementos of a which rivaled chosse of the ancient old world culture of which the apparently knew nothing leave already been brought to washington from year to year but always there was the perplexing question how old are they by minute study and comparisons ot the rings of the timbers uncovered and j old trees and stumps of the vicinity it Is hoped to arrive at a very acau J rate date t a |