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.


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.