Description
after the Royal Exchange was destroyed by fire in 1838
including courtyard and main entrance
- how about keeping the brute
Sir John Parsons leaving for Westminster by barge
Astronomical quadrant Size:XS: 25 x 20cm after the Royal Exchange wasA 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
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