Astronomical quadrant mb-width 3790 showing James Broughton and another

showing James Broughton and another fighter at Marylebone Fields

View of the east end of the church before restoration

National Discount Company's offices

Showing an improvement proposal for sea-water swimming pools

Astronomical quadrant mb-width 3790 showing James Broughton and anotherA 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