object
Abney level
A named hand clinometer with a sighting tube and spirit vial for slope angles. Not a clinometer twin without the Abney tube, not a dumpy-level, and not a spirit-level alone.
Also known as Abney’s level · Abney clinometer
object
A named hand clinometer with a sighting tube and spirit vial for slope angles. Not a clinometer twin without the Abney tube, not a dumpy-level, and not a spirit-level alone.
Also known as Abney’s level · Abney clinometer