Fox dip and intensity apparatus

Made:
c. 1840 in Falmouth
designer:
Robert Were Fox
maker:
W George

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Fox dip and intensity apparatus by George, c.1840. Fox dip and intensity apparatus made by W George of Falmouth,
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Fox dip and intensity apparatus by George, c.1840. Fox dip and intensity apparatus made by W George of Falmouth,
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Fox dip and intensity apparatus made by W George of Falmouth, Cornwall. A magnetic needle on a horizontal axis lays
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Fox dip and intensity apparatus made by W George of Falmouth, Cornwall. A magnetic needle on a horizontal axis lays
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Fox dip and intensity apparatus made by W George of Falmouth, Cornwall. A magnetic needle on a horizontal axis lays
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Fox dip and intensity apparatus made by W George of Falmouth, Cornwall. A magnetic needle on a horizontal axis lays
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Thermometer detail of Fox dip and intensity apparatus made by W George of Falmouth, Cornwall. A magnetic needle on a
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Adjustment under base of Fox dip and intensity apparatus made by W George of Falmouth, Cornwall. A magnetic needle on a
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Thermometer scale on Fox dip and intensity apparatus made by W George of Falmouth, Cornwall. A magnetic needle on a
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Hooks & screw fitting in box associated with Fox dip and intensity apparatus made by W George of Falmouth, Cornwall. A
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Fox dip and intensity apparatus by George, c.1840

Detail of jewel bearings. Fox dip and intensity apparatus made by W George of Falmouth, Cornwall. A magnetic needle on a horizontal axis lays horizontally only at the magnetic equator where the attraction to the poles is evenly balanced. Elsewhere, the needle will dip, to an angle dependent upon its distance from the nearest magnetic pole. Dip circles were frequently taken on scientific expeditions from the 18th century onwards. R W Fox introduced a variation in design in 1834, to allow for use on a moving ship and the measurement of magnetic force as well as dip.

Details

Category:
Terrestrial Magnetism
Object Number:
1908-97
type:
dip circle
credit:
Admiralty Hydrographic Department

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