Case for 12-inch astronomical quadrant by Bird
Case for 12-inch astronomical quadrant by Bird, employed in the observations of the transit of Venus in 1769 and at schiehallion 1774-76
Twelve inch astronomical quadrant by Bird
- maker:
- John Bird and John Troughton
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Science Museum Group Collection
© The Board of Trustees of the Science Museum
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
Details
- Category:
- Astronomy
- Object Number:
- 1900-138
- Measurements:
-
overall: 640 x 430 x 250 mm
- type:
- quadrant - optical and instrument case
- credit:
- The Royal Society
Parts
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 (copper, zinc alloy) and steel (metal)
- Object Number:
- 1900-138 Pt2
