Science of Reading Tree Rings Reveals Dendrochronology Leap
A report on tree ring dating outlines how annual growth layers form a clock for archeology and climate studies. Scientist Andrew Douglass pioneered methods in the 1920s with National Geographic sponsorship to date Pueblo Bonito and other ruins, linking sunspot activity to climate and using living rings as a dating device.
MENTIONED IN THIS ARTICLE
Wassingtgn
Andrew Efli
Tinges Pramscott Douglass
Douglass
National Geographic Society
Southwest
Sunspot Theory Pioneer Linked Tree Rings to Climate
The article recounts a scientist at Lowell Observatory in Flagstaff who mapped sunspot cycles to tree-ring patterns dating from 1650 to 1723 and later to 1901, arguing a solar-terrestrial link. It notes debates, photographic studies, and his push to understand weather changes via sunspots and pine ring data.
MENTIONED IN THIS ARTICLE
Rees
Ling
Lowell Observatory
Solar Research
Doctor Douglass’s Last Miles Between Home and UA Lab
An aging Dr Douglass retained a special license allowing him to drive the short distance from his Tucson home to the Trees Ring Laboratory he founded at the University of Arizona.
MENTIONED IN THIS ARTICLE
Douglass
Tucson
University of Arizona
New Committee On Alcoholism Schedules First Meeting
A nine member advisory committee on alcoholism created by the legislature will hold a preliminary meeting on June 13 in Denver. The panel, replacing the old ad commission on alcoholism, will operate as an arm of the Department of Health starting July 1. Members include Judge Don Bowman, Dr Edward J Delehanty, Dr Wesley Hisele, Byron Halstedt, Pat O'Brien, Rev Arthur W Pierpoint, Paul K Terrotenhuis, William L McDivitt, and R Cunningham with affiliations from University of Colorado School of Medicine, Colorado Fuel and Iron, Pueblo, and Colorado Southern Railroad.
MENTIONED IN THIS ARTICLE
Denver
Ad Commission On
Department of Health
Denver Dist
Don Bowman
Edward J. Delehanty
Wesley Hisele
University of Colorado School of Medicine
Byron Halstedt
Pat O'Brien
Durango
Arthur W. Pierpoint
Colorado Springs
Paul K. Terrotenhuis
Pueblo
Colorado Fuel and Ton Corp
William L. McDivitt
Clere Junior College
R. Cunningham
Colorado and Southern Railroad
Pershing Missile Passes Severe Wind Stress Test
Cape Canaveral Florida reports the Army Pershing missile withstood simulated high wind loads exceeding 50 miles an hour during a night launch. The guidance system corrected a sharp tilt and the missile reached its 200 mile target, marking the 21st success in 37 tests. NATO deployment is planned later this year.
MENTIONED IN THIS ARTICLE
Cape Canaveral
Fla
Japy
NATO
New York Exports Tobacco Products Worth 108.2 Million
New York tobacco product exports for calendar year 1361 totaled 108.2 million dollars. Trade data show strong shipments to international markets, reflecting a robust colonial commodities market and government taxation trends influencing production and sales.
MENTIONED IN THIS ARTICLE
New York
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