Astronomical quadrant mb-width 3790 'Ladies buy your leaf

'Ladies buy your leaf

Showing an improvement proposal for sea-water swimming pools

flowers and leaves of Astragalus caulescens

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

Astronomical quadrant mb-width 3790 'Ladies buy your leafA 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