This person was the first cartographer to use both parallels and meridians, centering them at Rho- des.
Hipparchus wrote a work criticizing this person's three-volume work Geographica, which described how to map the inhabited world. This person was the first cartographer to use both parallels and meridians, centering them at Rho- des. In a famous experiment, this person measured the shadow of a vertical stick at noon at Alexandria during the summer solstice and approximated the distance from Alexandria to Syene, which was almost due south near the Tropic of Cancer, to approximate the circumference of the Earth. This person is also credited with devising a system in which all of the multiples of each number, other than multiplication by one, are crossed out from a table. Name this ancient Greek who developed a technique for finding prime numbers, his eponymous sieve.
Hipparchus wrote a work criticizing this person's three-volume work Geographica, which described how to map the inhabited world.
{Eratosthenes} of {Cyrene} [or {Erastosthenes}]