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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1685-1768
English natural philosopher who followed up Edmond Halley's (1656-1742) attempt at defining atmospheric circulation by correctly describing the trade wind circulation in relation to the rotation of Earth. A member of the early Royal Society, in 1735 Hadley presented a paper "Concerning the Cause of the General Trade Winds," theorizing from the observed data of trade wind motion. Halley stated that sun-heated air rose over the equator allowing air from the north and south to flow toward the equator, but the easterly orientation of this flow escaped him. Hadley realized that the rotation of Earth from west to east gave northerly or southerly flow an easterly trajectory, since motion from the north or south toward the equator in the reference of a rotating sphere appears slower. This anticipated the theory of Coriolis force, the conception of a force acting to the right on an object on a rotating body, in the next century.