Some Biogeographers, Evolutionists and Ecologists:
Douglass, Andrew Ellicott (United States
Douglass was by training an astronomer (who at one
point worked for William Pickering and Percival Lowell), but he is perhaps
best known for his development of the technique known as dendrochronology,
or tree-ring dating. He had been looking for some way to connect the record
of sunspot cycles to climate, and found that he was able to correlate
tree-ring patterns with the time of onset of various historical events,
both natural and anthropogenic. His most important work involved his development
of the technique of cross-dating, which has made it possible to extend
backward a continuous record of events through thousands of years of history.
--born in Windsor, Vermont, on 5 July 1867.
--1885: enters Trinity College, Hartford, Connecticut
--1889: graduates from Trinity College with
honors in astronomy, mathematics, and physics
--1890: accompanies Harvard expedition to establish
an observatory in Arequipa, Peru
--1894: chosen as an assistant and sent to the
Arizona Territory to work with Pervical Lowell at the Lowell Observatory;
ends up being made acting director at those times Lowell was absent
--1901: dismissed by Lowell for disagreeing
with his interpretation of Martian surface patterns
--1903-1906: serves as probate judge in Arizona
--1906: joins the faculty of the University
--1910-1911: acting president, University of
--1914: publishes "A
Method of Estimating Rainfall by the Growth of Trees" in the Bulletin
of the American Geographical Society
--1917-1937: director of the Steward Observatory,
--1918: made professor of astronomy, University
--1919: publishes his Climatic
Cycles and Tree Growth, Vol. I
--1924-1925: vice-president, American Meteorological
--1925-1938: research associate, Carnegie Institute
--1928: publishes his Climatic
Cycles and Tree Growth, Vol. II
--1936: publishes his Climatic
Cycles and Tree Growth, Vol. III
--1938-1958: director, Laboratory of Tree-Ring
Research, University of Arizona
--1941: publishes "Crossdating in Dendrochronology"
in the Journal of Forestry
--dies at Tucson, Arizona, on 20 March
--American National Biography, Vol. 6 (1999).
Vol. 77(2) (1986): 291-301.
--Tree Rings and Telescopes: The Scientific Career of A. E. Douglass (1983).
Antiquity, Vol. 28(1) (1962): 87-89.
Review, Vol. 52(4) (1962): 612-614.
--American Scientist, Vol. 88(5) (2000):
Copyright 2005 by Charles H. Smith. All rights
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