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Simple Dip Circle
England, circa 1830
The needle is present in this picture, but is pointing straight up-and-down. It probably could use adjustment of its bearing points, careful balancing, and re-magnetization to be functional. Simple dip needles like this are used for demonstrations and hobby-science rather than for serious work. |
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A dip
circle measures the angle the Earth's magnetic field makes with
the horizontal, called the "dip angle". This is a very
simple dip circle. It has no adjustment for leveling (it presumes
it will be put on a horizontal table) nor does it protect the magnetic
needle from outside influences like static electricity or breezes.