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![[Offset staff].](https://i0.wp.com/crouchrarebooks.com/wp-content/uploads/2019/02/15107_1H.jpg?fit=1247%2C6099&ssl=1)
![[Offset staff].](https://i0.wp.com/crouchrarebooks.com/wp-content/uploads/2019/02/15107_2H.jpg?fit=3976%2C3736&ssl=1)
![[Offset staff].](https://i0.wp.com/crouchrarebooks.com/wp-content/uploads/2019/02/15107_3H.jpg?fit=750%2C1439&ssl=1)
[Offset staff].
c1850.
Mahogany staff (4 feet 9 inches) with steel shod pointed foot, the pole 1 inch dia., 4 inch dia. hard ball.
15107
notes:
A finely made example of an offset staff. The instrument consists of a turned wooden pole. At one end is a metal spike so that the pole can be easily driven into the ground. On the other end is a wooden ball with a cross-slight. The instrument was designed to measure off sets, that is, to locate objects that are at a 90 degree angle to the surveying centreline.
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