Astronomical quadrant mb-width 3790 flowers and leaves of Astragalus

flowers and leaves of Astragalus caulescens

Showing an improvement proposal for sea-water swimming pools

Buckingham Palace forecourt

Mick Channon and wife Jane & Janet Williams

George Michael and Andrew Ridgeley

Astronomical quadrant mb-width 3790 flowers and leaves of AstragalusA 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