Magnetometer 25/1-0-1 Gauss Handheld Water Polished brass bells on swivel

Polished brass bells on swivel brackets

Card black with white markings

Spiral bound soft cover

Fishing Boat 68mm stern to bow

Magnetometer 25/1-0-1 Gauss Handheld Water Polished brass bells on swivelPOCKET MAGNETOMETERS DUAL PURPOSE, TWO COLOR SCALE makes the Model 25 Magnetometer more useful. The upper Black scale (the one more usually used) reads directly in gauss of a uniform magnetic field oriented parallel with the centerline of the instrument scale. The lower Red scale is used in determining the magnitude and direction of an unknown magnetic field by merely orienting the instrument for maximum reading. When shown in the Red scale, at such a