Aratou Soleōs Phainomēna kai Diosēmeia. Theōnos scholia. Eratosthenous Katasterismoi. Metron tēs gēs Peripherias. Tou kubou diplasiasmos. Koskinon. Tou Neilou pēgai. Tou kanonos tomē. Dionysiou hymnoi. Accesserunt annotationes in Eratosthe

86. Eratosthenes, a director of the great Library at Alexandria, is best remembered for his calculation of the circumference of the Earth. He did this by noticing the difference in the angles of shadows cast by gnomons at Alexandria and Syene. His result is remarkably close to our modern value. This work is based on a manuscript containing fragments of texts by Eratosthenes and others and was edited and annotated by John Fell of Oxford.
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86. Eratosthenes, a director of the great Library at Alexandria, is best remembered for his calculation of the circumference of the Earth. He did this by noticing the difference in the angles of shadows cast by gnomons at Alexandria and Syene. His result is remarkably close to our modern value. This work is based on a manuscript containing fragments of texts by Eratosthenes and others and was edited and annotated by John Fell of Oxford.

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