Astronomical quadrant Product:Fine art poster with figures and boats on

with figures and boats on the River Thames

Kilburn Park

It appears that being 'taken unawares' was what constituted police brutality in 1874

Front view of buildings on Aldersgate Street

Fordhook House

Astronomical quadrant Product:Fine art poster with figures and boats onA 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