The following sections of this BookRags Literature Study Guide is offprint from Gale's For Students Series: Presenting Analysis, Context, and Criticism on Commonly Studied Works: Introduction, Author Biography, Plot Summary, Characters, Themes, Style, Historical Context, Critical Overview, Criticism and Critical Essays, Media Adaptations, Topics for Further Study, Compare & Contrast, What Do I Read Next?, For Further Study, and Sources.
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The following sections, if they exist, are offprint from Beacham's Encyclopedia of Popular Fiction: "Social Concerns", "Thematic Overview", "Techniques", "Literary Precedents", "Key Questions", "Related Titles", "Adaptations", "Related Web Sites". (c)1994-2005, by Walton Beacham.
The following sections, if they exist, are offprint from Beacham's Guide to Literature for Young Adults: "About the Author", "Overview", "Setting", "Literary Qualities", "Social Sensitivity", "Topics for Discussion", "Ideas for Reports and Papers". (c)1994-2005, by Walton Beacham.
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1195-1256
English astronomer and mathematician, also known as John of Holywood or John of Halifax, whose Tractatus de sphaera (1220) helped popularize the ideas of Ptolemy (fl. 100s). In 1472 the book became Europe's first printed work on astronomy, and despite a number of errors, it continued to be widely used until the seventeenth century. Sacrobosco called for calendar reform in De anni ratione (1232), and discussed the use of the quadrant by astronomers in Tractatus de quadrante.