- Title Pages
-
The Joan Palevsky
Imprint in Classical Literature
- [UNTITLED]
- Dedication
- Preface
- Abbreviations
- Introduction
- Book One of Cleomedes’ The Heavens
-
Chapter One
1 - Chapter Two
- Chapter Three
-
Chapter Four
1 - Chapter Five
-
Chapter Six
1 - Chapter Seven
- Chapter Eight
- Book Two of Cleomedes’ The Heavens
- Chapter One
- Chapter Two
- Chapter Three
- Chapter Four
- Chapter Five
- Chapter Six
-
Chapter Seven
1 - Figures
- Appendix: Posidonius on Physics and Astronomy
- Glossary of Selected Terms
- Bibliography
- Passages from Cleomedes in Collections of Texts
- General Index
- Index Locorum
Chapter Seven
Chapter Seven
- Chapter:
- (p.78) Chapter Seven
- Source:
- Cleomedes' Lectures on Astronomy
- Author(s):
Alan C. Bowen
Robert B. Todd
- Publisher:
- University of California Press
This chapter reports on Posidonius' and Eratosthenes' measurements of the circumference of the Earth. Eratosthenes' doctrine about the size of the Earth demonstrates its size by a geodesic procedure, while Posidonius' is less complicated. Each [philosopher] takes certain assumptions [as being the case], and then arrives at demonstrations via the implications of the assumptions. Eratosthenes says, and it is the case, that (E6) Syene is located below the summer tropical circle. Those who say that the Earth cannot be spherical because of the hollows occupied by the sea and the mountainous protrusions, express a quite irrational doctrine.
Keywords: Earth, Posidonius, Eratosthenes, circumference, geodesic procedure, assumptions, spherical
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- Title Pages
-
The Joan Palevsky
Imprint in Classical Literature
- [UNTITLED]
- Dedication
- Preface
- Abbreviations
- Introduction
- Book One of Cleomedes’ The Heavens
-
Chapter One
1 - Chapter Two
- Chapter Three
-
Chapter Four
1 - Chapter Five
-
Chapter Six
1 - Chapter Seven
- Chapter Eight
- Book Two of Cleomedes’ The Heavens
- Chapter One
- Chapter Two
- Chapter Three
- Chapter Four
- Chapter Five
- Chapter Six
-
Chapter Seven
1 - Figures
- Appendix: Posidonius on Physics and Astronomy
- Glossary of Selected Terms
- Bibliography
- Passages from Cleomedes in Collections of Texts
- General Index
- Index Locorum