Ramsden's zenith sector, used in the Great Trigonometrical Survey Date 1903


Ramsden's zenith sector, used in the Great Trigonometrical Survey Date 1903


Size: 1710px × 3000px
Photo credit: © FLHC1112 / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: antique, archival, educational, historic, historical, history, image, rare, rarity