USDA Forest Service:
1913. Insects and forest fires. A breeding place for various forest insects. Near Ashland, Oregon.
USDA Forest Service:
1914. Fire-scorched pines infested with Dendroctonus sp. Colestin, Oregon.
USDA Forest Service:
1934. Portion of timber burned in the August 1933 fire and scene of the tree medication studies. Jewell, Oregon.
USDA Forest Service:
1934. Result of the August 1933 fire and scene of the tree medication studies. Jewell, Oregon.
USDA Forest Service:
1934. Scene through a portion of the August 1933 fire and the type of Douglas-fir trees used in the tree medication studies. Jewell, Oregon.
USDA Forest Service:
1934. Tin collar used in medicating fire-killed Douglas-fir. Tree medication studies. Jewell, Oregon.
USDA Forest Service:
1934. Two of the medicated fire-killed Douglas-fir trees and a portion of the August 1933 burned area. Jewell, Oregon.
USDA Forest Service:
1934. Tin collar used on medicated fire-killed Douglas-fir. Tree medication studies.
USDA Forest Service:
1934. Tin collar used on medicated fire-killed Douglas-fir. Tree medication studies. Jewell, Oregon.
USDA Forest Service:
1934. Increment cores from heavily burned Douglas-fir tree showing path of mercuric chloride solution. Tree medication studies. Jewell, Oregon.
USDA Forest Service:
1934. Increment cores from lightly burned Douglas-fir tree showing path of mercuric chloride solution. Tree medication studies. Jewell, Oregon.
USDA Forest Service:
1934. Increment cores from green Douglas-fir tree showing path of mercuric chloride solution. Tree medication studies. Jewell, Oregon.
USDA Forest Service:
1934. Section of burned Douglas-fir showing Eosine (Eosin), HgCl2 (mercuric chloride), and Cambium stains. Tree medication studies. Jewell, Oregon.
USDA Forest Service:
1934. Yellow stain in outer sapwood of heavily burned Douglas-fir, caused by leaching of elements in the dead cambium. Tree medication studies. Jewell, Oregon.
USDA Forest Service:
1934. Discoloration caused by absorption of mercuric chloride solution in green Douglas-fir, 12 inches above saw cut. Tree medication studies. Jewell, Oregon.
USDA Forest Service:
1934. Section of lightly-burned Douglas-fir showing irregular absorption of Eosine (Eosin) dye and HgCl2 (mercuric chloride) solution. Tree medication studies. Jewell, Oregon.
USDA Forest Service:
1934. Xyleborinus sp. galleries in sapwood of Douglas-fir killed by fire. Pack Forest, Washington.
USDA Forest Service:
1934. Xyleborinus sp. galleries in sapwood of Douglas-fir killed by fire. Pack Forest, Washington.
USDA Forest Service:
1934. Ergates spiculatus wood borer work. Fire-killed Douglas-fir deterioration.
USDA Forest Service:
1934. Douglas-fir snags on a 45 year old burn. Clatskanie, Oregon.
USDA Forest Service:
1934. Douglas-fir snags on a 45 year old burn. Clatskanie, Oregon.
USDA Forest Service:
1934. Fire-killed Douglas-fir 32 years after the 1902 Yacolt Burn.
USDA Forest Service:
1934. Fire-killed Douglas-fir in high country, 32 years after the 1902 Yacolt Burn. Yacolt, Washington.
USDA Forest Service:
1934. Fire-killed Douglas-fir in high country, 32 years after the 1902 Yacolt Burn. Yacolt, Washington.
USDA Forest Service:
1934. Top end of fire-killed Douglas-fir in high country, 32 years after the 1902 Yacolt Burn. Columbia National Forest, Washington.
USDA Forest Service:
1934. Break in fire-killed Douglas-fir showing mycelium of Fomes laricis. Yacolt, Washington.
USDA Forest Service:
1934. Spore of Fomes laricis on Douglas-fir killed in the 1902 Yacolt Burn. Yacolt, Washington.
USDA Forest Service:
1935. Mature Pinus lambertiana tree in an old burned area. Jawbone Ranger District, Stanislaus National Forest, California.
USDA Forest Service:
1935. Snags from a 1922 burn near Timber, Oregon - 12 years after the burn.
USDA Forest Service:
1935. Asemum atrum Esch. galleries in butt log of Douglas-fir from a 1922 burn near Timber, Oregon - 12 years after the burn.
