Rare Maps 
Rare Atlases 
Rare Books 
Rare Prints 
Globes and Planetaria Sign up to hear about our latest acquisitions, exhibitions and events
Find Us
New York
PO Box 329, Larchmont, NY, USA
Opening hours, London Gallery
Monday to Friday: 10:00 – 18:00
Saturday: by appointment
Closed: all bank holidays and 1-31 August
Opening hours, New York
By appointment only
Opening hours
[Offset staff].
- Publication date: c1850.
- Physical description: Mahogany staff (4 feet 9 inches) with steel shod pointed foot, the pole 1 inch dia., 4 inch dia. hard ball.
- Inventory reference: 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.
Image gallery
Sign up to hear about our latest acquisitions, exhibitions and events
Find Us
New York
PO Box 329, Larchmont, NY, USA
Opening hours, London Gallery
Monday to Friday: 10:00 – 18:00
Saturday: by appointment
Closed: all bank holidays and 1-31 August
Opening hours, New York
By appointment only