Artwork of theodolite made by Ramsden in 1787

Artwork of theodolite made by Ramsden in 1787

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Credit: SCIENCE PHOTO LIBRARY

Caption: Theodolite. Historical artwork of a theodolite designed by Jesse Ramsden (1735-1800) in 1787 for the Royal Society. A theodolite is used to measure horizontal and vertical angles. Here there are two telescopes: the one at top centre for vertical angles and the one at centre left for horizontal ones. Accurate triangulation for map making was made possible by its use.

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Keywords: 1787, artwork, historical, history of science, mathematical, mathematics, measurement, ramsden, surveying equipment, telescope, telescopes, theodolit, theodolite

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