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A. E. Douglass, American astronomer (died 1962)
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A. E. Douglass
American astronomer
A. E. Douglass was an American astronomer. He discovered a correlation between tree rings and the sunspot cycle, and founded the discipline of dendrochronology, which is a method of dating wood by analyzing the growth ring pattern. He started his discoveries in this field in…Source: Wikipedia (CC BY-SA)