Mural quadrant by George Graham

Mural quadrant

George Graham

Fine art poster

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  • Amazing giclée print quality
  • 280gsm thick fine art print paper
  • 100+ year colour guarantee
  • Dimensions:
    • by cm including border ( by in)
    • by cm excluding border ( by in)

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Our prints

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.

Read more about our fine art prints.

Manufactured in the UK

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.

Delivery & returns

We print everything to order so delivery times may vary but all unframed prints are despatched within 2-4 days via courier or recorded mail.

Delivery to the UK is £5 for an unframed print of any size.

We will happily replace your order if everything isn’t 100% perfect.

Mural quadrant by George Graham zoom

Mural quadrant

This 8ft Mural Quadrant was made for the second Astronomer Royal, Edmond Halley by (or under the direction of) instrument maker George Graham and was such a success that it became a prototype for similar instruments all over Europe.

A mural quadrant is, as the name would suggest, a telescope mounted on a quarter circle frame which is then mounted on a wall aligned north-south so that the two sides or radii run vertical and horizontal. The telescope is pivoted at what would be the centre of the circle while the circle's circumference carries a scale from 0 to 90 degrees. This allows the observer to measure the angular height of the star he or she is observing.

Telescope: The tube length is 8ft with an 8ft 0.5inch focus. Its object glass was replaced in 1789 replacing the common OG with an achromatic one.

Mount: The mount is made up of an iron and mahogany frame with a brass scale divided into 96 parts by subdivision which could then be readjusted to produce a 0-90 degree angle scale. The scale was redivided by John Bird in 1753 and the quadrant remounted to face north instead of south.
George Graham

Original size: 2438 mm

  • Image reference: L2157-007

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