Gurley Dip Needle Lake Superior Model with Case

Image: Gurley Dip Needle Lake Superior Model with Case

Detailed Description

Also known as a Forrester's Compass or Miner's Compass, a dip (or dipping) needle is an instrument for measuring the intensity of the earth's magnetic field. It is used to locate buried or hidden metal. Manufactured by W. & L.E. Gurley, Troy, New York. Object ID: USGS-000345

Details

Image Dimensions: 1176 x 1311

Location Taken: US