Page:Climatic Cycles and Tree-Growth - 1919.djvu/39

 {|
 * || DOUGLASS PLATE 3
 * | A
 * Climatic Cycles and Tree-Growth Plate 3A.jpg
 * | B
 * Climatic Cycles and Tree-Growth Plate 3B.jpg
 * }
 * | B
 * Climatic Cycles and Tree-Growth Plate 3B.jpg
 * }

A. Section of Scotch pine from southern England.

B. Section of Scotch pine from coast of Norway.