Astronomical quadrant mb-width 3790 Showing an improvement proposal for

Showing an improvement proposal for sea-water swimming pools

The man is playing the fiddle whilst people go about their business in the market behind him

George Michael and Andrew Ridgeley

boats with wheels and boats transformed into sledges

Astronomical quadrant mb-width 3790 Showing an improvement proposal forA 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