TERMIUM Plus®

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SWEDISH MINING COMPASS [1 record]

Record 1 2012-07-05

English

Subject field(s)
  • Scientific Instruments
  • Magnetic and Electromagnetic Prospecting
  • Magnetism
  • Geophysics
CONT

The Swedish mining compass is probably the earliest magnetic prospecting instrument, consisting essentially of a light needle in jewel and stirrup suspension, free to move in a horizontal and vertical direction. The case is carried over the ground by three cords tied together above the instrument. To compensate for the vertical component of the earth's field, a small piece of wax may be attached to the south end of the needle.

French

Domaine(s)
  • Instruments scientifiques
  • Prospection magnétique et électromagnétique
  • Magnétisme
  • Géophysique
OBS

La boussole suédoise [est un des] instruments qui mesurent les composantes du champ magnétique. [...] Une aiguille aimantée (aimant permanent) est libre de s'orienter dans le plan vertical autour d'un axe [...] L'intensité du champ peut être définie de façon semi-quantitative à l'aide d'un contrepoids lorsque l'axe est orienté horizontalement et les mesures d'angle d'inclinaison apparente [...] indiquent les variations locales de l'intensité du champ magnétique.

Spanish

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