Astronomical quadrant mb-width 3790 boats with wheels and boats

boats with wheels and boats transformed into sledges

National Discount Company's offices

showing James Broughton and another fighter at Marylebone Fields

'Ladies buy your leaf

Buckingham Palace forecourt

Astronomical quadrant mb-width 3790 boats with wheels and boatsA 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