John Smeaton
| John Smeaton | |
|---|---|
Portrait of John Smeaton, with the Eddystone Lighthouse in the background
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| Born |
8 June 1724 Austhorpe, Leeds, England |
| Died |
28 October 1792 (aged 68) Austhorpe, Leeds, England |
| Occupation | Civil engineer |
| Awards | Copley Medal (1759) |
John Smeaton FRS (8 June 1724 – 28 October 1792) was an English civil engineer responsible for the design of bridges, canals, harbours and lighthouses. He was also a capable mechanical engineer and an eminent physicist. Smeaton was the first self-proclaimed civil engineer, and often regarded as the "father of civil engineering".
He was associated with the Lunar Society.
Smeaton was born in Austhorpe, Leeds, England. After studying at Leeds Grammar School he joined his father's law firm, but left to become a mathematical instrument maker (working with Henry Hindley), developing, among other instruments, a pyrometer to study material expansion and a whirling speculum or horizontal top (a maritime navigation aid). In 1750, his premises were in the Great Turnstile in Holborn.
He was elected a Fellow of the Royal Society in 1753, and in 1759 won the Copley Medal for his research into the mechanics of waterwheels and windmills. His 1759 paper "An Experimental Enquiry Concerning the Natural Powers of Water and Wind to Turn Mills and Other Machines Depending on Circular Motion" addressed the relationship between pressure and velocity for objects moving in air (Smeaton noted that the table doing so was actually contributed by "my friend Mr Rouse" "an ingenious gentleman of Harborough, Leicestershire" and calculated on the basis of Rouse's experiments), and his concepts were subsequently developed to devise the 'Smeaton Coefficient'. Smeaton's water wheel experiments were conducted on a small scale model with which he tested various configurations over a period of seven years. The resulting increasing efficiency in water power contributed to the Industrial Revolution.
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