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The ruler then is slid so that the pencil mark is aligned with the true airspeed (B) seen through the transparent part of the wheel. The wind correction angle is determined by matching how far right or left the pencil mark is from the hole, to the wind correction angle portion of the slide's grid.
The cabin was owned by a local Bernardhus Van Leer, a notable physician, and later by the Van Leer family, who were noted in the anti-slavery cause. [2] [3] Prior to and during the American Civil War, the Van Leer family used the Log Cabin as a station for the Underground Railroad to help slaves escape to free negro communities. [4]
Log building is the second most common type of carpentry in American history. In some regions and periods it was more common than timber framing. There are many different styles of log carpentry: (1) where the logs are made into squared beams and fitted tightly. This style is typical of defensive structures called a blockhouse.
C. A. Nothnagle Log House, built in New Jersey circa 1640, is likely the oldest log cabin in the United States. Pre-fabricated log houses for export were manufactured in Norway from the 1880s until around 1920 by three large companies: Jacob Digre in Trondheim, M. Thams & Co. in Orkanger, and Strømmen Trævarefabrik at Strømmen. They were ...
A variety of rulers A carpenter's rule Retractable flexible rule or tape measure A closeup of a steel ruler A ruler in combination with a letter scale. A ruler, sometimes called a rule, scale or a line gauge or metre/meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. [1]
A rolling ruler is a ruler that contains a cylinder much like a rolling pin inside, thereby enabling it to "roll" along a sheet of paper or other surface where it is being used. A rolling ruler can draw straight, parallel lines, and also has other instruments included, enabling it to do the jobs of a protractor and compass .
Early Lufkin logo. The company was founded by Edward Taylor Lufkin, an American Civil War veteran of the Sixtieth Regiment Ohio Volunteer Infantry [1] in Cleveland, Ohio, 1869 [2] and was originally named E.T. Lufkin Board and Log Rule Manufacturing Company.
The log scaler is an occupation in the timber industry. The Log Scaler measures the cut trees to determine the scale (volume) and quality (grade) of the wood to be used for manufacturing. When logs are sold, in order to determine the basis for a sale price in a standard way, the logs are "scaled" which means they are measured, identified as to ...