USDA Forest Service:
1916. F.Paul Keen inside Dendroctonus brevicomis (western pine beetle) insect study cage used to force beetles to attack a green log. The upper log is infested with bark beetles. Near Ashland, Oregon.
USDA Forest Service:
1925. Field laboratory at Three Lakes. Kaibab control project. Kaibab National Forest, Arizona.
USDA Forest Service:
1925. Field laboratory at Three Lakes. Kaibab control project. Kaibab National Forest, Arizona.
USDA Forest Service:
1931. Ponderosa pine, slash relations, temperature, bark beetle study.
USDA Forest Service:
1932. Walter J. Buckhorn examines field cage on ponderosa pine Dendroctonus brevicomis Lec. brood trees. Prineville, Oregon.
USDA Forest Service:
1933. Toothpick method of counting Dendroctonus brevicomis (western pine beetle) emergence holes. Sisters, Oregon.
USDA Forest Service:
1933. Toothpick method for counting Dendroctonus brevicomis (western pine beetle) emergence holes. Sisters, Oregon.
USDA Forest Service:
1935. George Englerth, forest pathologist, beside an insect cage on a fire-killed Douglas-fir near Gales Creek, Oregon.
USDA Forest Service:
1937. Laboratory quarters at the University of Washington's Pack Forest. La Grande, WA.
USDA Forest Service:
1937. Insectary set up by Robert L. Furniss at the Pack Forest, west of Mt. Rainier. La Grande, Washington.
USDA Forest Service:
1937. Insectary/field laboratory set up by Robert L. Furniss at the Pack Forest. La Grande, Washington.
USDA Forest Service:
1939. Laboratory under construction at the University of Washington's Pack Forest. La Grande, Washington.
USDA Forest Service:
1939. Laboratory under construction at the University of Washington's Pack Forest. La Grande, Washington.
USDA Forest Service:
1939. Laboratory under construction at the University of Washington's Pack Forest. La Grande, Washington.
USDA Forest Service:
1939. Detail of glass insect cages over individual ambrosia beetle attacks on Douglas-fir. Pack Forest. La Grande, Washington.
USDA Forest Service:
1940. New laboratory/living quarters. Pack Forest, La Grande, Washington.
USDA Forest Service:
1940. New laboratory/living quarters. W.D. Bedard on steps. Pack Forest, La Grande, Washington.
USDA Forest Service:
1942. Robert L. Furniss. USDA Bureau of Entomology and Plant Quarantine, Division of Forest Insect Investigations. Portland Lab, Federal Courthouse, Portland, Oregon.
USDA Forest Service:
1945. W.J. Buckhorn (left) and R.L. Furniss examining hemlock looper collecting tray. Clatsop County, Oregon.
USDA Forest Service:
1945. Furniss (left) and Buckhorn examine caged hemlock looper larvae. Clatsop County, Oregon.
USDA Forest Service:
1950. W.K. Coulter inspects egg concentrate for hemlock looper egg recovery. BEPQ. Portland, OR.
USDA Forest Service:
1950. W.J. Buckhorn demonstrates the first step for recovery of hemlock looper eggs. BEPQ. Portland, Oregon.
USDA Forest Service:
1950. W.J. Buckhorn demonstrates first moss screening step in recovery of hemlock looper eggs. BEPQ. Portland, Oregon.
USDA Forest Service:
1953. Bear Sleds Ranger Station. Spruce budworm research field laboratory in basement. Used as field lab 1952, 1953, and 1954. Wallowa, OR.
USDA Forest Service:
1953. Gelatin capsules used in rearing spruce budworm pupae in parasite studies. Lab in basement of Ranger Station at Wallowa, Oregon.
USDA Forest Service:
1953. Cloth-bottomed trays used in rearing spruce budworm larvae in parasite studies. Lab in basement of Ranger Station at Wallowa, Oregon.
USDA Forest Service:
1954. Corrugated paper carton and shell vial cage used in sampling overwintering western spruce budworm larvae.
USDA Forest Service:
1955. Cages used for caging infested and green Douglas-fir logs. J.A. Beal in foreground. Weyerhaeuser Timber Company research project. Coos Bay, Oregon.
USDA Forest Service:
1955. Use of square water sterilization bottle to hold foliage in rearing tray for spruce budworm larvae parasite studies. Field lab. Union, Oregon.
USDA Forest Service:
1955. 5 gallon ice cream containers, equipped with vials, used for forcing western spruce budworm larvae from hibernation to the light. Union field laboratory. Union, Oregon.
