If the relationship sought proves to be real, the rings in the trunks of trees give us not only a means of studying climatic changes through long periods of years, but perhaps also of tracing changes in solar activity during the same time.

If the relationship sought proves to be real, the rings in the trunks of trees give us not only a means of studying climatic changes through long periods of years, but perhaps also of tracing changes in solar activity during the same time.
A. E. DOUGLASS

Activity Change Perhaps Relationship Time Tree
Our fertile valleys and craggy mountains recite an epic poem of geologic conflicts.
A. E. DOUGLASS
The science of meteorology is still comparatively new and supplies us only with a few decades of records on which to base our conclusions.
A. E. DOUGLASS
Nature is a book of many pages and each page tells a fascinating story to him who learns her language.
A. E. DOUGLASS

Fascination Herself Language Learning Nature Page

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