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Granville Tailer Woods (April 23, 1856 – January 30, 1910) was an American inventor who held more than 50 patents in the United States. [1] He was the first African American mechanical and electrical engineer after the Civil War. [2]
Beginning in the 1540s, further exploitation of its remaining forests ensued as British factories began consuming vast amounts of wood to fuel its iron industry. In an attempt to preserve its dwindling resource, parliament passed Act for the Preservation of Woods in 1543, limiting further felling of timber to 440 yards from landed property.
Apart from structural wood preservation measures, ... invented in Denmark in 1911, ... and black locust (Robinia pseudoacacia) ...
They use black tablets for the children in the schools, and write upon them along the long side, not the broadside, writing with a white material from the left to the right. [13] The first classroom uses of large blackboards are difficult to date, but they were used for music education and composition in Europe as far back as the 16th century. [14]
A 2011 discovery in the Canadian province of New Brunswick yielded the earliest known plants to have grown wood, approximately 395 to 400 million years ago. [5] [6]Wood can be dated by carbon dating and in some species by dendrochronology to determine when a wooden object was created.
Black & Decker had trouble keeping up with demand for the Workmate in the UK, but was still unconvinced of how well the Workmate would be accepted in the United States. As a test of demand, the UK-manufactured Workmate WM325 was introduced to the United States market in 1974 as the Model 79-001 Type E ("E" for England).
The ferric acetate thus formed reacts with the tannin in the wood, forming a black substance crusting the top of the wood. [2] [3] Since hardwoods have higher tannin content, they are more convenient woods to ebonize. However, softwoods can be ebonized by soaking them with tea (which has a high tannin content) and then applying the solution. [3]
Masonite board Back side of a masonite board Isorel, с. 1920 Quartrboard, [1] Masonite Corporation, c. 1930. Masonite, also called Quartboard or pressboard, [2] is a type of engineered wood made of steam-cooked and pressure-molded wood or paper fibers.