Abstract
IN NATURE, vol. xxiii. p. 583, the writer presented a chart of magnetic declination which represented the results at forty-five stations in Missouri. The facts seemed to indicate a marked effect due to contour. Up to the middle of August of the past summer nothing inconsistent with this explanation was found, although the number of stations had been increased to over eighty. By that time the stations had become so numerous in Central Missouri that a more minute survey along the river bank between Jefferson City and Glasgow gave promise of affording a crucial test. It was necessary that the 8° line, which bends down the river, crossing at some point east of the mouth of the Osage River, should return on the south side of the river, looking something like a reversed contour line.
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NIPHER, F. Magnetic Survey of Missouri . Nature 25, 40–41 (1881). https://doi.org/10.1038/025040b0
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DOI: https://doi.org/10.1038/025040b0