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Kaye and Laby: Versions History

Subsection 2.7.6 Geomagnetism

Latest Version

  • 2.1
    • Date of go live: 22 August 2011
    • Change type: Revised presentation
    • Summary of changes between versions 2.0 and 2.1:
      Text changed to reduce the need for frequent updates. Table of Gauss coefficients replaced by 3 figures describing the earth's magnetic field. A new figure shows the long term variation of Declination at Greenwich.

Previous Version(s)

Please note that any links found within the PDF may not work. The PDFs listed here are intended to show the past content of this SubSection only and as such are not designed to work as part of a wider collection of content.

  • 2.0 Adobe Acrobat file
    • Date of go live: 21 November 2008
    • Summary of changes between versions 1.0 and 2.0:
      The descriptive text was completely rewritten and expanded. An account was given of the World Magnetic Model 2005, a mathematical model from which the earth’s magnetic field components may be calculated. A table of current values of the coefficients used in this model was included and a link provided to the British Geological Survey website on which charts and other data were displayed. The tables of ‘Magnetic elements at London since 1580’ and of ‘Geomagnetic data 1990’ were omitted.
  • 1.0 Adobe Acrobat file
    • Date of go live: 15 July 2005
    • Summary:
      This was the first published online version of Kaye and Laby - as the unedited contents of the hard copy 16th edition (published 1995)
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