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Using an Abney Level Abney levels use a split viewing area. When the user
looks through the eyepiece, half of the area is used to view the spirit bubble and
the remaining area is for viewing the target. To measure vertical angles or slope,
the ...
2
Field Techniques in Glaciology and Glacial Geomorphology
An Abney Level is a surveying instrument consisting of a spirit level, protractor
and a sighting tube, used to measure the angle of inclination of a line from the
observer to a distant point, for example a slope measurement. Abney Levels are
...
Bryn Hubbard, Neil F. Glasser, 2005
3
Construction Measurements
The Abney Level A variation of the hand level is the clinometer or abney level in
Fig. 2.7.1 which is equipped with a small graduated circle and its spirit bubble is
movable with the circle. This device can be used to check an inclined slope, as in
...
4
Stream Hydrology: An Introduction for Ecologists
... of right triangles can be used to obtain vertical distances by measuring one
side and one angle of the triangle (see Figure 5.3). Vertical angles can be
measured upward or downward from horizontal with a clinometer or Abney level
...
Nancy D. Gordon, Thomas A. McMahon, Brian L. Finlayson, 2013
The Abney level is so designed that it can be used either as a hand level or as a
clinometer. It is a very popular instrument of its class. The construction of this
level is shown in Fig. 8.4. Bubble lube Magnifying glass Graduations Vernier arm
...
6
Surveying And Levelling
Initially, the points are established approximately by an abney level, and then
accurately fixed by a levelling instrument. 1. Location of contour gradient
Suppose it is required to locate the centre line of a road in a hilly area with a
ruling gradient ...
7
Catalogue of Keuffel & Esser Co., Manufacturers and ...
Abney Level No. 5710, but in sewed leather Sling Case . . » 5710 P. Abney
Reflecting Level or pocket Altimeter, 5 in., improved, with arc graduated to
degrees for 60°, vernier reading to 10 minutes, also per cent of angle reading to 5
% from 0 ...
8
Surveying & field work: a practical text-book on surveying, ...
Abney's level is a useful hand instrument for measuring vertical angles, and is
based on a very neat device. The principle of the ... 28. A square Fig. 28. —
Principle of Abney's Level. tube about 4J ins. long has a small eye-hole at one
end.
James Williamson (civil engineer.), 1915
The most commonly used hypsometers in North America have been the Abney
level, the Haga altimeter, the Blume-Leiss altimeter, and the Suunto clinometer (
Fig. 5-14). The Abney level in its original form (Calkins and Yule. 1935) and ...
Bertram Husch, Thomas W. Beers, John A. Kershaw, Jr., 2002
ABNEY CLINOMETER (ABNEY LEVEL) Abney level is one of the various forms
of clinometers used for the measurement of slopes, taking cross-sections, tracing
contours, setting grades and all other rough levelling operations. It is a light, ...
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Forest Service museum efforts moving forward in Missoula
Artifacts held by the museum also include a 1921 K&E Abney level with compass, and a backpack pump, circa 1950. More than 33,000 items ... «The Missoulian, 4月 15»
