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The wood of black birch is heavy at 47 pounds per cubic foot and is used for furniture, millwork, and cabinets. It is similar to yellow birch wood and often not distinguished from it in the lumber trade. [5] The sap flows about a month later than maple sap, and much faster. The trees can be tapped in a similar fashion, but must be gathered ...
Prunus emarginata, the bitter cherry [2] or Oregon cherry, is a species of Prunus native to western North America, from British Columbia south to Baja California, and east as far as western Wyoming and New Mexico. [3] [4] It is often found in recently disturbed areas or open woods on nutrient-rich soil. [5] [6] [7]
When testing wood in lumber form, the Janka test is always carried out on wood from the tree trunk (known as the heartwood), and the standard sample (according to ASTM D143) is at 12% moisture content and clear of knots. [3] The hardness of wood varies with the direction of the wood grain. Testing on the surface of a plank, perpendicular to the ...
Wood to be used for construction work is commonly known as lumber in North America. Elsewhere, lumber usually refers to felled trees, and the word for sawn planks ready for use is timber. [46] In Medieval Europe oak was the wood of choice for all wood construction, including beams, walls, doors, and floors.
Green woodworking (also written greenwoodworking) is a form of woodworking that uses unseasoned or "green" timber. The term "unseasoned" refers to wood that has been freshly felled or preserved by storing it in a water-filled trough or pond to maintain its naturally high moisture content.
A Woman of Ōhara Carrying Firewood, Japanese painting by Nagasawa Rosetsu (1754–1799).. For most of human history, firewood was the main fuel, until the use of coal spread during the Industrial Revolution. [4]
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