Thomas Smith (engineer)

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Thomas Smith (6 December 1752 – 21 June 1815) was a Scottish businessman and early lighthouse engineer. In 1786 he became the first Chief Engineer of the Northern Lighthouse Board. Born in Broughty Ferry near Dundee, his father, a skipper, drowned when Smith was young. His mother steered him toward an onshore career, and he started in ironmongery. He later moved to Edinburgh and ran a successful lamps and oils business called the Greenside Company’s Works. He won a contract to light Edinburgh’s New Town with oil lamps that used parabolic reflectors, making them much brighter.

His success helped him become Chief Engineer to the new Northern Lighthouse Board. He traveled south to learn from English lighthouse builders and then supervised the construction of four modern lighthouses: Kinnaird Head, Mull of Kintyre, Eilean Glas, and North Ronaldsay. The sites were remote, but all four were completed. Smith adopted the Argand lamp with a circular wick and glass chimney, and paired it with his parabolic reflectors to create a catoptric system that set the standard at the time. The first lighthouse, Kinnaird Head (1787), used 17 whale-oil lamps with reflectors and was said to have a light that reached 12–14 miles.

He continued to experiment, and Start Point, Sanday (1806) featured a revolving light. Smith retired in 1808 and was succeeded by his stepson, Robert Stevenson. In 1792 he married his third wife, Jean Lillie Stevenson, who brought her son Robert Stevenson into the family. Stevenson grew up helping Smith and later became a partner, eventually succeeding him as Chief Engineer and starting a Stevenson lighthouse-building dynasty.

Thomas Smith died at 2 Baxter’s Place, Edinburgh, on 21 June 1815, aged 62, and was buried in Old Calton Burial Ground. He left behind a legacy of improved lighting and a family that continued his work through the Stevenson line. His son James and daughter Jane survived infancy, as did another daughter, Mary-Anne, from his second wife.