Pamphlets on Forestry in Oregon, Volume 3

acres adults annual automobile bark bark-beetles beetles Board of Forestry bridge burning California camp grounds campers Cascade Cascade Range cell cent Coast COLUMBIA RIVER HIGHWAY Coos Bay Corvallis crops Dendroctonus dense Douglas fir Eagle Creek east eggs elevation elytra estry Federal fishing forest fires forest land Forest Service Forestry galleries Government growing Hood River infested insects kiln Lake larch larvae located Logging Engineering lumber industry Marshfield mature McKenzie McKenzie Bridge methods miles Mount Hood mountain National Forest nuts operation Oreg Oregon Agricultural owners pack patrol plant Portland production pronotum protection pseudotsugae punctured railroad range ranger reached road School of Forestry season seed side slopes soil Sophomore Southern Pacific species spring stand station streams summer summit supply timber tion trail trees trip Valley walnut western hemlock western red cedar Willamette wood yellow pine young growth