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A level staff, also called levelling rod, is a graduated wooden or aluminium rod, used with a levelling instrument to determine the difference in height between points or heights of points above a vertical datum. When used for stadiametric rangefinding, the level staff is called a stadia rod.
Diagram showing relationship between two level staff, or rods, shown as 1 and 3. The level line of sight is 2. The surveyor looks through the eyepiece of telescope while an assistant holds a vertical level staff which is graduated in inches or centimeters. The level staff is placed vertically using a level, with its foot on the point for which ...
A Philadelphia rod is a level staff used in surveying. The rod is used in levelling procedures to determine elevations and is read using a level. A Philadelphia rod consists of two sliding sections graduated in hundredths of a foot. On the front of the rod the graduation increasing from zero at the bottom.
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The level staff is placed with its foot on the point for which the level measurement is required. The telescope is rotated and focused until the level staff is plainly visible in the crosshairs. In the case of a tilting level, the fine level adjustment is made by an altitude screw, using a high accuracy bubble level fixed to the telescope.
Typical values are in the range of 0.75 - 1.5 J⋅g −1 ⋅K −1 in the temperature interval 25 - 100 °C. The A, B constants increase with the x value, i.e. with both the aluminium and the lithium content, while the constant C does not follow a precise trend. [16]
A ranging rod, or range rod, is a surveying instrument used for marking the position of stations, and for sightings of those stations, as well as for ranging straight lines. [1] Initially these were made of light, thin, and straight bamboo , or of well seasoned wood such as teak , pine , or deodar .
Old School RuneScape is a massively multiplayer online role-playing game (MMORPG), developed and published by Jagex.The game was released on 16 February 2013. When Old School RuneScape launched, it began as an August 2007 version of the game RuneScape, which was highly popular prior to the launch of RuneScape 3.