Abstract
THE first systematic series of magnetic observations made in France was undertaken by Lamont, who in 1856 and 1857 determined the absolute value of the different elements at forty-four stations. The results are contained in his “Untersuchungen über die Richtung und Stärke der Erdmagnetismus an Verschiedenen Puncten des Südwestlichen Europa,” and are reduced to three mean epochs: declination to March 1854; horizontal component to June 1848; and dip to the August of the same year. In 1868 and 1869 the Rev. Father Perry made a second series of observations of the intensity and direction of the earth's magnetic force at thirty-three stations in France (Phil. Trans., vols. clx. and clxii.). Determinations of declination have also been made at about twenty stations by MM. Marié-Davy and Descroix in 1875; and declination, dip, and intensity have been observed by M. de Bernardières at various points along the Mediterranean littoral. These observations comprised all that was known respecting the distribution of the magnetic elements and rate of secular change in France prior to the appearance of the important work which forms the subject of this notice.
Article PDF
Rights and permissions
About this article
Cite this article
THORPE, T. A New Magnetic Survey of France 1 . Nature 37, 247–251 (1888). https://doi.org/10.1038/037247c0
Issue Date:
DOI: https://doi.org/10.1038/037247c0