Astronomical quadrant mb-width 3790 George Michael and Andrew Ridgeley

George Michael and Andrew Ridgeley

The front of the car concentrating on the bumper

boats with wheels and boats transformed into sledges

flowers and leaves of Astragalus caulescens

Showing an improvement proposal for sea-water swimming pools

Astronomical quadrant mb-width 3790 George Michael and Andrew RidgeleyA 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