A.E. Douglass Collection

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ABOUT THE COLLECTIONS

The Laboratory of Tree-Ring Research

In 1937 A. E. Douglass, founder of the modern science of dendrochronology, established the Laboratory of Tree-Ring Research at the University of Arizona. The Tree-Ring Lab is recognized worldwide as a preeminent center for the advancement of tree-ring techniques and the broad application of dendrochronology in the social and environmental sciences.

The Tree-Ring Lab collections and archives includes materials from LTRR's first director, Andrew Ellicott Douglass. Selected items from the A.E. Douglass archives have been digitized and made available in this online collection.

QUESTIONS?

For more information about The Laboratory of Tree-Ring Research, including collections and archives available for research, visit the LTRR website at: http://ltrr.arizona.edu.

Collections in this community

Archaeology

A.E. Douglass Collection - Archaeology
Astronomy

A.E. Douglass Collection - Astronomy
Miscellanea

A.E. Douglass Collection - Miscellanea

Recent Submissions

University of Arizona Eclipse Expedition

Douglass, A.E. (1923)
The Steward Observatory of the University of Arizona

Douglass, A.E.; University of Arizona (Astronomical Society of the Pacific, 1918-12)
An Automatic Optical Photograph, Abstract

Douglass, A.E. (1919)
The Callendar Sunshine Recorder and Some of the World-Wide Problems to Which This Instrument Can Be Applied

Douglass, A.E.; University of Arizona (Washington, Government Printing Office, 1916-01-08)
Zodiacal Light and Counter-Glow and the Photography of Large Areas and Faint Contrasts

Douglass, A.E.; University of Arizona (Harrison & Sons, St. Martin's Lane, Printers in Ordinary to His Majesty, 1916)
An Optical Periodograph

Douglass, A.E. (1915-04)
A Photographic Periodogram of the Sun-Spot Numbers

Douglass, A.E. (1914-10)
Drawings of a Comet

Douglass, A.E.; University of Arizona (1910-03)
The Illusions of Vision and the Canals of Mars

Douglass, A.E. (1907-05)
Is Mars Inhabited?

Douglass, A.E. (1907-03)
Photographs of the Zodical Light

Douglass, A.E. (Astronomical Society of the Pacific, 1901-04-01)
A New Almucantar

Douglass, A.E. (1903-04-13)
The Missing November Meteor

Douglass, A.E. (The Coconino Sun, 1900-11)
Boating Down the Colorado

Douglass, A.E. (University of Arizona, 1907-11)
Weather Prediction in Northern Arizona

Douglass, A.E. (The Coconino Sun, 1900-12-01)
Photographs of the Zodiacal Light

Douglass, A.E. (1900)
A Hypothesis Regarding the Surface Markings of Jupiter

Douglass, A.E. (1900-11)
The Effects of Mountains On the Quality of the Atmosphere

Douglass, A.E. (1899)
Mars.

Douglass, A.E. (1899-01)
A Summary of Planetary Work at the Lowell Observatory and the Conditions Under Which It Has Been Performed

Douglass, A.E. (1899)

In accordance with the title, the present paper divides itself into two parts, of which the first wil1 be a brief resume of the planetary work done here, with a few details and announcements which have not heretofore been given to the public, and the second will present the writer's personal opinions of why it has been possible to reach these results. The latter must necessarily be more in the form of suggestions than facts, for to give facts one must have tried personally many widely separated localities over long periods of time.