John Bird's Twelve inch astronomical quadrant
Twelve inch astronomical quadrant by Bird, employed in the observations of the transit of Venus in 1769, at Schiehallion 1774-76,
- Materials:
- brass and threaded rods, steel
- Object Number:
- 1900-138 Pt2
Twelve inch astronomical quadrant by Bird, employed in the observations of the transit of Venus in 1769, at Schiehallion 1774-76, with case and key, subsequently repaired and redivided by "Troughton" engraved "R.S 63" on stand with 4 levelling screws, cleaned and relacquered, October 1951
Twelve inch astronomical quadrant by Bird, employed in the observations of the transit of Venus in 1769, at Schiehallion 1774-76,