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Solid Brass 5-inch Abney Level

Solid Brass 5-inch Abney Level

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This is a solid brass reproduction of an Abney Level, which is named after Captain William Abney of the School of Engineering in Chatham, England.  The Abney Level is also known as an Angle Sextant, and its purpose is to measure vertical angle or inclination.  The level consists of a telescope and an adjustable tubular spirit level that is connected to a vertical scale marked in both slope and degrees.  There is a horizontal index line that is aligned over the object being measured, when viewing through the eyepiece.  Adjacent to the object is a reflected image of the tubular spirit level as viewed from underneath.  The level should be adjusted until the bubble is centered and aligned to the horizontal index line.  Then the angle of inclination or declination can be read from the vernier scale.  "Stanley London" is engraved on the side of the level.
When the 1-power telescope is extended the Abney Level is 5 inches (12.7 cm) long and 7 1/8 inches (18.1 cm).  To help in reading the vernier scale, the level has a 1 1/4 inch (3.2 cm) radius scale with a magnifier.  The spirit level has two adjustment screws.  The Abney Level measures 2 1/4 inches (5.7 cm) tall, 1 1/4 inches (3.2 cm) thick, and weighs 6.3 ounces (179 grams).  This antique reproduction Abney Level is fully functional but is not certified accurate.
The polished solid brass Abney Level is available for only $45.  We also have a very large selection of sextants.

5-inch Solid Brass Abney Level

Status Quantity

5-inch Solid Brass Abney Level


Brasso Brass Cleaner, 8 Ounce Can


Abney Level
Abney Level
Detail of Level and Mirror Slot
Detail of Level and Mirror Slot
Detail of Scale
and Magnifier
Detail of Scale and Magnifier
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