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  1. Fitting Geomagnetic Fields before the Invention of Least Squares: I. Henry Bond's Predictions (1636, 1668) of the Change in Magnetic Declination in London. [REVIEW]Richard J. Howarth - 2002 - Annals of Science 59 (4):391-408.
    The London mathematical practitioner Henry Bond correctly forecast in The Sea-Mans Kalendar for 1636 [?1638] that the then easterly magnetic declination in London would become zero in 1657 and would then increase westerly for 'at least 30 years'. In 1668, he published a table of predicted changes in annual declination for the years 1668-1716. Despite a detailed examination of his later claim to be able to determine longitude using a dip needle, the basis for his earlier forecasts was not examined (...)
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  • Fitting Geomagnetic Fields before the Invention of Least Squares: II. William Whiston's Isoclinic Maps of Southern England (1719 and 1721). [REVIEW]Richard J. Howarth - 2003 - Annals of Science 60 (1):63-84.
    (2003). Fitting Geomagnetic Fields before the Invention of Least Squares: II. William Whiston's Isoclinic Maps of Southern England (1719 and 1721) Annals of Science: Vol. 60, No. 1, pp. 63-84.
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