The Two Earths of Eratosthenes

  title={The Two Earths of Eratosthenes},
  author={Christi{\'a}n C. Carman and James Evans},
  pages={1 - 16}
In the third century b.c.e., Eratosthenes of Cyrene made a famous measurement of the circumference of the Earth. This was not the first such measurement, but it is the earliest for which significant details are preserved. Cleomedes gives a short account of Eratosthenes’ method, his numerical assumptions, and the final result of 250,000 stades. However, many ancient sources attribute to Eratosthenes a result of 252,000 stades. Historians have attempted to explain the second result by supposing… 
Martianus Capella’s calculation of the size of the moon
The eighth book of Martianus Capella’s famous De Nuptiis Philologiae et Mercurii deserves a prominent place in the history of astronomy because it is the oldest source that came down to us
The so-called ‚Itinerary Stade‘ and the Accuracy of Eratosthenes' Measurement of the Earth
Summary This paper presents a new argument against the widely accepted view that Eratosthenes and some other Greek authors of the pre-Roman period measured distances in special stades that were much
A common-sense approach to the problem of the itinerary stadion
  • I. Tupikova
  • Computer Science
    Archive for History of Exact Sciences
  • 2022
The possibility of using statistical analysis methods to estimate the length of the stadion by comparing ancient routes with the actual distances is discussed and a formal differentiation between metrologically defined ancient measuring units and other measures used to estimate long distances is proposed.
Mathematical discourse in philosophical authors: Examples from Theon of Smyrna and Cleomedes on mathematical astronomy
Christián Carman, 2020, DOI: 10.5281/zenodo.3928498, pp. 213–228. Chapter DOI: 10.5281/zenodo.3975743. Open access distribution under a Creative Commons Attribution 4.0 International (CC-BY) license.
A Complete Bibliography of Publications in Isis, 2000{2009
accademiche [38]. Ada [45]. Adrian [45]. African [56]. Age [39, 49, 61]. Al [23]. Al-Rawi [23]. Aldous [68]. Alex [15]. Allure [46]. America [60, 66]. American [49, 69, 61, 52]. ancienne [25].
Scale in Action
  • R. Netz
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  • Linguistics
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Space in Action
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  • Scale, Space and Canon in Ancient Literary Culture
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Aristarchus's On the Sizes and Distances of the Sun and the Moon: Greek and Arabic Texts
In the 1920s, T. L. Heath pointed out that historians of mathematics have "given too little attention to Aristarchus" (Heath 1921, vol. 2, 1). This is still true today. The Greek text of
Hipparchus on the distances of the sun and moon
"Hipparchus' investigation of this topic is based principally on the sun. For since it is a consequence of certain other properties of the sun and moon (which we shall discuss below) that when the