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Results tagged with geography
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user 13393
5
votes
How did Eratosthenes know the distance between Aswan and Alexandria?
Based on the discussion of Eratosthenes' method in Daniel Špelda's Astronomie v Antice (Astronomy in Antiquity, ISBN 80-7225-210-0), the distance of 5000 stadia was estimated by Eratosthenes based on …
- 191
4
votes
0
answers
139
views
Why couldn't Robert Peary use his theodolite at the North pole
Robert Peary writes in his book The North Pole:
The instruments used in taking
observations for latitude may be either a sextant and an artificial
horizon, or a small theodolite. Both these instrumen …
- 609