september
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Foresters chip base of trees to inspect cambium (a protective layer between bark and inner wood). If this is damaged, tree cannot survive and will be marked to cut, September 1973
by U.S. National Archives
by U.S. National Archives
No known copyright restrictions(著作権制限なし)

A "cat skinner" works in post-fire salvage operations. Caterpillar tractors are used to haul logs to "landing area" (seen here), where they are loaded onto trucks, September 1973
by U.S. National Archives
by U.S. National Archives
No known copyright restrictions(著作権制限なし)

In August, 1973 a major forest fire swept through 17,470 acres of the western slopes of the Sierra Mountain Range near Sonora. In post-fire salvage operation, a "faller" cuts down flame-damaged trees, September 1973
by U.S. National Archives
by U.S. National Archives
No known copyright restrictions(著作権制限なし)

ABT rack locomotive at Mount Morgan, Queensland, ca.1890-1900
by State Library of Queensland, Australia
by State Library of Queensland, Australia
No known copyright restrictions(著作権制限なし)
No known copyright restrictions(著作権制限なし)
3,241件~3,300件 (全 150,556件)