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 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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1236-1312
French Jewish mathematician and astronomer who translated several key works into Hebrew, and wrote a number of mathematical and astronomical treatises. Among the texts Jacob translated from Arabic were Euclid's (c. 325-c. 250 B.C.) Elements and Ptolemy's (c. 100-170) Almagest. In a treatise whose English title is Jacob's Quadrant, he explained the workings of a quadrant he had invented, and in his Luhot (Tables) he offered astronomical tables for the ascensions of stars over Paris. Dante Alighieri (1265-1321) mentioned the latter book in his Divine Comedy. Among the scientists influenced by Jacob's theories was Nicolas Copernicus (1473-1543).