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Abney

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A pocket instrument used in surveying which consists of a fixed sighting tube, a movable spirit level connected to a pointing arm and an arced scale graduated 0 to 90º in both directions. When correctly used, the Abney Level is an accurate surveying tool used to measure degrees, percent of grade and...
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Abney Level
A pocket instrument used in surveying which consists of a fixed sighting tube, a movable spirit level connected to a pointing arm and an arced scale graduated 0 to 90º in both directions. When correctly used, the Abney Level is an accurate surveying tool used to measure degrees, percent of grade and...
Location: USA
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