In this critical edition of Nicole Oresme's 14th-century treatise on atmospheric refraction, Oresme uses optics and infinitesimals to help solve this vexing problem of astronomy, proposing that light travels along a curve through the atmosphere, centuries before Hooke and Newton.

Nicole Oresme was one of the most original and influential thinkers of the fourteenth century. He is best known for his mathematical discoveries, his economic theories, as well as his vernacular translations of cosmological and ethical texts that were undertaken at the request of King Charles V. This volume sheds light on the beginning of Oresme's scientific activity at the University of Paris (ca. 1340 – ca. 1350), a period of his intellectual career about which little is known. Over the course of this decade, Oresme lectured on many Aristotelian texts on natural philosophy, such as the Physics, On the Heavens, On generation and corruption, Meteorology, and On the Soul. Oresme's commentaries on Aristotle's Meteorology count among his only unpublished texts. This volume presents the first critical edition of books I-II.10 of the second redaction of Oresme's Questions on Meteorology. The edition is preceded by a historical and philological introduction that discusses the context of Oresme’s scientific career and examines the manuscript tradition.

Contains a English translation of Questions 1-21 with a bibliography.

Edward Grant describes the extraordinary range of themes, ideas, and arguments that constituted scholastic cosmology for approximately five hundred years, from around 1200 to 1700. Primary emphasis is placed on the world as a whole, what might lie beyond it, and the celestial region, which extended from the Moon to the outermost convex surface of the cosmos.