Publisher's Synopsis
Excerpt from Report on the Variations of the Magnetic Intensity: Observed at Different Points of the Earth's Surface
It is to France we owe the first rightly directed experimental inquiry on this subject. The instructions, drawn up by the members of the French Academy Of Sciences for the expedition of La Perouse, contain a recommendation that the time of vibra tion of a dipping needle should be observed at stations widely remote, as a test of the equality or difference of the magnetic intensity; suggesting also with a sagacity anticipating the result, that such Observations should particularly be made at those parts of the earth where the dip was greatest and where it was least.
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