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RENNIE, JOHN (1761–1821)

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Originally appearing in Volume V23, Page 101 of the 1911 Encyclopedia Britannica.
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RENNIE, See also:JOHN (1761–1821) , See also:British engineer, was the youngest son of See also:James Rennie, a See also:farmer at Phantassie, See also:Haddingtonshire, where he was See also:born on the 7th of See also:June 1761. On his way to the See also:parish school at See also:East See also:Linton he used to pass the workshop of See also:Andrew Meikle (1719–1800), the inventor of the threshing See also:machine, and its attractions were such that he spent there much of the See also:time that was supposed to be spent at school. In his twelfth See also:year he was placed under Meikle, but after two years he was sent to See also:Dunbar High School, where he showed marked aptitude for See also:mathematics. On his return to Phantassie he occasionally assisted Meikle, and soon began to erect See also:corn See also:mills on his own See also:account. In 178o, while continuing his millwright's business, he began to attend the classes on See also:physical See also:science at See also:Edinburgh University. Four years later he was commissioned by See also:Boulton and See also:Watt, to whom he was introduced by See also:Professor John Robison (1739–1805), his teacher at Edinburgh, to super-intend the construction of the machinery for the See also:Albion See also:flour mills, which they were See also:building at the See also:south end of Blackfriars See also:Bridge, See also:London, and a feature of his See also:work there was the use of See also:iron for many portions of the See also:machines which had formerly been made of See also:wood. The completion of these mills established his reputation as a See also:mechanical engineer, and soon secured him a large business as a maker of millwork of all descriptions. But his fame chiefly rests on his achievements in See also:civil See also:engineering. As a See also:canal engineer his services began to be in See also:request about 1790, and the See also:Avon and Kennet, the See also:Rochdale and the See also:Lancaster canals may be mentioned among his numerous See also:works in See also:England. His skill solved the problem of draining and reclaiming extensive tracts of See also:marsh in the eastern counties and on the Solway See also:Firth. As a bridge engineer he was responsible for many structures in England and See also:Scotland, among the most conspicuous being three over the See also:ThamesSee also:Waterloo Bridge, See also:Southwark Bridge and London Bridge—the last of which he did not live to see completed. A noteworthy feature in many of his designs was the See also:flat roadway.

Among the harbours and docks in the construction of which he was concerned may be mentioned those at See also:

Wick, See also:Torquay, See also:Grimsby, See also:Holyhead, See also:Howth, See also:Kingstown and See also:Hull, together with the London See also:dock and the East See also:India dock on the Thames, and he was consulted by the See also:government in respect of improvements at the See also:dockyards of See also:Portsmouth, See also:Sheerness, See also:Chatham and See also:Plymouth, where the See also:breakwater was built from his plans. He died in London on the 4th of See also:October 1821, and was buried in St See also:Paul's. In See also:person he was of See also:great stature and strength, and a bust of him by See also:Chantrey (now in the See also:National See also:Gallery), when exhibited at See also:Somerset See also:House, obtained the name of See also:Jupiter Tonans. Of his See also:family, the eldest son See also:George, who was born in London on the 3rd of See also:September 1791 and died there on the 3oth of See also:March 1866, carried on his See also:father's business in See also:partnership with the second son John, who was born in London on the 3oth of See also:August 1794 and died near See also:Hertford on the 3rd of September 1874. George devoted himself especially to the mechanical See also:side of the business. John completed the construction of London Bridge, and at its opening in 1831 was made a See also:knight. He succeeded his father as engineer to the See also:Admiralty, and finished the Plymouth breakwater, of which he published an account in 1848. He was also the author of a See also:book on the Theory, Formation and Construction of . British and See also:Foreign Harbours (1851–J4), and his Autobiography appeared in 1875. He was elected See also:president of the Institution of Civil See also:Engineers in 1845, and held the See also:office for three years.

End of Article: RENNIE, JOHN (1761–1821)

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