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| Front Illustration: Map from Dunkerque to Spain, through Amiens, Paris, Bourges, and the mountains to the south, reaching the Mediterranean Sea 20 km west of Barcelona. The map shows the triangles used. It is clear how the angles were measured with a Borda (actually assistant [[ https://en.wikipedia.org/wiki/%C3%89tienne_Lenoir_(instrument_maker) | Etienne Lenoir ]] repeating circle theodolite | Front Illustration: Map from Dunkerque to Spain, through Amiens, Paris, Bourges, and the mountains to the south, reaching the Mediterranean Sea 20 km west of Barcelona. The map shows the triangles used. It is clear how the angles were measured with a Borda (actually assistant [[ https://en.wikipedia.org/wiki/%C3%89tienne_Lenoir_(instrument_maker) | Etienne Lenoir ]] ) [[ https://en.wikipedia.org/wiki/Repeating_circle | repeating circle theodolite ]], and that given the angles and one measured sides, all the sides of all the triangles can be computed ... |
The Measure Of All Things
The Seven-Year Odyssey and Hidden Error That Transformed the World
Ken Alder, 2002 | Central 526.1 A361m 2002
Have copy at Hollyberry
Also by Ken Alder, Engineering the Revolution Arms and Enlightenment in France, 1763-1815 ... 18th century history defined by the gun, probably not interesting
geodesy
Front Illustration: Map from Dunkerque to Spain, through Amiens, Paris, Bourges, and the mountains to the south, reaching the Mediterranean Sea 20 km west of Barcelona. The map shows the triangles used. It is clear how the angles were measured with a Borda (actually assistant Etienne Lenoir ) [[ https://en.wikipedia.org/wiki/Repeating_circle | repeating circle theodolite ]], and that given the angles and one measured sides, all the sides of all the triangles can be computed ...