Page:Percival Lowell - an afterglow.djvu/47

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An Afterglow ���cal love! Study of the trees was his chief delight in his tramps afield. In a book in manuscript on "Peaks and Plateaux in the Effect on Tree Life," presented to the writer by Dr. Lowell, he shows a deep interest and an unusual knowledge of the subject. This is an account of his ascent of the San Francisco Peaks, of Arizona, in quest of trees. He found them aplenty in the respective zones which he has thus defined: �Douglas Fir at 8700 ft. �Silver " ? " 9350 " �Cork " " 9480 " �In this charming fashion he describes his original observations: "From the great height at which it first appeared, from the question mark given the identification at the time, and lastly from the same doubt expressing itself when it was encountered upon the descent upon the face of the mountain, it is probable that the supposed Silver Fir was Cork Fir and it will be provisionally considered. The Cork Fir is a tree of high habit, intermediate be- tween the Fir and Spruce zones though belonging properly to the former. This surprising and truly spectacular Fir is a peculiarity of the San Fran- cisco Peaks in Arizona. Relatively so unknown is it that botanists visiting the region are taken to it at their request as a natural curiosity and it has not yet found its way into the tree books." �It is noteworthy that some trees will bear eternal �33 ��� �