The Scientific Achievement of the Middle Ages Book

	Introduction	1
Chapter 1.	The Early Middle Ages	27
Chapter 2.	The Twelfth Century	37
	Selections from Adelard of Bath, Natural Questions	38
	Selections from Anonymous, On the Elements	52
Chapter 3.	Robert Grosseteste and Scientific Method	61
	Selections from Robert Grosseteste, The Impressions of the Elements	65
	Selections from Robert Grosseteste, The Heat of the Sun	68
Chapter 4.	The Tides	73
	Selections from Robert Grosseteste, An Inquiry into the Causes of the Tides	74
Chapter 5.	Studies of the Rainbow	81
	Selections from Carl B. Boyer, "The Theory of the Rainbow: Medieval Triumph and Failure," Isis. XLIX (1958), 378-390	94
Chapter 6.	Studies of Local Motion	102
	Selection from H. Lamar Crosby, Jr., ed., Thomas of Bradwardine His Tractatus de Proportionibus	105
	Selections from John Buridan, Questions on the Heavens and the World	111
	Selections from Marshall Clagett, The Science of Mechanics in the Middle Ages	121
	Selections from Nicole Oresme, On the Book of the Heavens and the World of Aristotle	124
Chapter 7.	Astronomy	125
	Selections from John Buridan, Questions on the Heavens and the World	127
	Selections from Nicole Oresme, On the Book of the Heavens and the World of Aristotle	131
Chapter 8.	The Fringes of Science	139
	Selections from Daniel of Morley, On the Natures of Things Above and Below	141
	Selections from Marius, On the Elements	148
	Selections from Robert Grosseteste, Hexaemeron	152
	Selections from Richard Fishacre, Commentary on the Sentences	155
	Selections from Michael Scot, Liber introductorius and Prooemium	157
	Selections from Roger Bacon, Opus maius	162
	Selections from Roger Bacon, Opus tertium	165
Chapter 9.	Conclusions	170
	Bibliographical Essay	177