A new and correct sea chart of the whole world showing the variations of the compass as they were found in the year 1700 by Edmond Halley

A new and correct sea chart of the whole world showing the variations of the compass as they were found in the year 1700

Edmond Halley

Fine art poster

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We use a 280gsm fine art paper and premium branded inks to create the perfect reproduction.

Our expertise and use of high-quality materials means that our print colours are independently verified to last between 100 and 200 years.

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All products are printed in the UK, using the latest digital presses and a giclée printmaking process.

We only use premium branded inks, and colours are independently verified to last between 100 and 200 years.

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A new and correct sea chart of the whole world showing the variations of the compass as they were found in the year 1700 by Edmond Halley zoom

A new and correct sea chart of the whole world showing the variations of the compass as they were found in the year 1700

This chart shows the results of the first British state-sponsored expedition with a purely scientific purpose. Because the earth's magnetic field is not uniform and, as a result, the mariner's compass points either side of north to a variable degree depending on the ship's position. To make navigation safer, Halley made an extensive series of comparisons between compass readings and determinations of north by astronomical observation. He plotted isogonic lines, joining points of equal magnetic variation.
Edmond Halley

  • Image reference: F1966

Discover more

More by the artist Edmond Halley.

Explore the collection Maps & charts.