John Harrison
John Harrison ( – 24 March 1776) was an English carpenter and clockmaker who invented the marine chronometer, a long-sought-after device for solving the problem of calculating longitude while at sea.Harrison's solution revolutionized navigation and greatly increased the safety of long-distance sea travel. The problem he solved had been considered so important following the Scilly naval disaster of 1707 that the British Parliament was offering financial rewards of up to £20,000 (equivalent to £}} in ) under the 1714 Longitude Act, though Harrison never received the full reward due to political rivalries.
Harrison presented his first design in 1730, and worked over many years on improved designs, making several advances in time-keeping technology, finally turning to what were called sea watches. Harrison gained support from the Longitude Board in building and testing his designs. Toward the end of his life, he received recognition and a reward from Parliament. Harrison came 39th in the BBC's 2002 public poll of the 100 Greatest Britons. Provided by Wikipedia
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Microcomputers and Second Language Teaching The Second Wave. Q&A / by Harrison, John S.
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Microcomputers and Second Language Teaching. Q & A by Harrison, John S.
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The Appreciation of Literature by Harrison, John
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Microcomputers and second language teaching : the second wave / by Harrison, John S.
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The ritualistic conspiracy comprising lists of "Priests" who desire the appointment of licensed confessors for the Church of England : of "Priests associate" of "The Confraternity... by Harrison, John
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Microcomputers and second language teaching / by Harrison, John S.
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Civics for ESOL Students, Grade 9 by Harrison, John S.
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China since 1800 by Harrison, John Armstrong
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Japan's northern frontier : a preliminary study in colonization and expansion, with special reference to the relations of Japan and Russia. by Harrison, John Armstrong
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The founding of the Russian Empire in Asia and America / by Harrison, John Armstrong
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The history of the Quaker Oats Company / by Thornton, Harrison John
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China since 1800 / by Harrison, John Armstrong
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China since 1800 by Harrison, John Armstrong
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The story of the atom. by Harrison, John Allen
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A Comprehensive Student Information System A Report Prepared for the California Postsecondary Education Commission by the Wyndgate Group, Ltd., Report No. 88-32 / by Harrison, John G.
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International aviation and terrorism : evolving threats, evolving security / by Harrison, John, 1970-
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A new method of making the banks in the Fens almost impregnable : so as in time to resist the force of rivers, in the most impetuous floods, and prevent all future inundations : wi... by Harrison, John, botanist
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A thanksgiving sermon for discovery of the late phanatick plot, September 9, 1683 by Harrison, John, -1698
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A thanksgiving sermon for discovery of the late phanatick plot, September 9, 1683 by Harrison, John, -1698
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Map of the City of New York extending northward to Fiftieth St by Harrison, John F.
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