Tree Rings: Timekeepers of the Past.

One of a series of general interest publications on science issues, this booklet describes the uses of tree rings in historical and biological recordkeeping. Separate sections cover the following topics: dating of tree rings, dating with tree rings, tree ring formation, tree ring identification, sample collections, tree ring cross dating, tree ring patterns, and present and future uses of tree rings. Numerous photographs and diagrams illustrate tree ring classifications and uses. (LP)