Description
held for him at the end of May 1858
This picture depicts an event from the Old Testament
Fordhook House
View of Powis House
Astronomical quadrant Product:Fine art poster held for him at theA 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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