Astronomical quadrant Size:XS: 25 x 20cm Also showing street scene with

Also showing street scene with horse-drawn carriage

The woman on the left is wearing a mantle over her dress

including courtyard and main entrance

Great Hall

Interior view of Lambeth Palace chapel

Astronomical quadrant Size:XS: 25 x 20cm Also showing street scene withA 12 inch astronomical quadrant made by John Bird. Astronomical quadrants were used to measure the angle of a celestial object from the zenith. Operated in conjunction with a transit instrument, they could be used to check the running rate of astronomical clocks known as regulators. At sea a quadrant can be used to help fix a ship's position and to determine latitude. ca. 1767