Publisher's Synopsis
Excerpt from Diseases of Deciduous Forest Trees
A series of investigations has been conducted for several years by the senior writer in another region where an extensive mixed forest has been severely injured by sulphur gases emanating from large copper smelters. The forest consists largely of oaks and pines grow ing on an extremely poor and sterile soil, and the general develop ment of the forest, even before the action of the sulphur gases, was very poor. The different species of forest trees showed a marked difference in susceptibility. The order, of susceptibility, beginning with the trees most easily killed, is as follows.
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