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A. E. Douglass and the Dendrochronology - SciHi Blog
Drill to take samples for dendrochronology from trees Image by Wikimedia User Hannes Grobe On July 5, 1867, American astronomer and archeologist A. E. (Andrew Ellicott) Douglass was born. He coined the name dendrochronology for tree-ring dating, a field he originated while working at the Lowell Observatory, Flagstaff, Arizona, by his discovery a correlation between tree rings and the sunspot cycle. A. E. Douglass was not the first, who suggested that a tree’s rings could determine its age. The first known record of the idea come from Leonardo da Vinci. However, Douglass was the first to use cross-dating methods successfully to