Photos from the WFIWC Archives:
Equipment and Methodology

Walter Buckhorn (left) with staff compass used during surveys of bark beetle killed trees, and his mentor F. Paul Keen. In late 1929, Keen established the Portland Forest Insect Laboratory with Buck as his assistant. Keen developed the first pine beetle susceptibility classification and published the first manual of insect enemies of western forests in 1939. His sample plots were a mile long and were surveyed with a staff compass and pacing. These plots were discontinued after the Division of Forest Insect Investigations was transferred to the Forest Service in 1953. Photo no. FPK 343, WFIWC archives. (Furniss 2000 Fig. 3)

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