Lime purifiers invented by Samuel Clegg revolutionized the coal gasification process, providing a method to clean industrial fuel. Born in Manchester in 1781, he emerged from an apprenticeship at the Boulton and Watt Soho Manufactory to become a central figure in the expansion of gas lighting infrastructure across the United Kingdom during the early nineteenth century.
Early Career and Gas Lighting
Under the tutelage of Dr. Dalton, Clegg gained a scientific education before observing William Murdoch's experiments. His first independent application of gas technology occurred at a cotton mill in Sowerby Bridge, owned by Henry Lodge. He subsequently installed lighting at Thomas Hinde’s worsted mill in Dolphinholme, Lancashire. In 1813, he achieved significant professional visibility by illuminating the London premises of printseller Rudolph Ackermann at 101 Strand. This success led to his appointment as engineer for the Chartered Gas Company.
Twenty questions, eight minutes on the clock, and a percentile measured against everyone who has taken it. No sign-up.
Take the IQ test →Innovation in Measurement
Clegg sought a reliable mechanism to measure gas consumption. Although early attempts to design a dry meter proved unsuccessful, he secured patents for a water meter in 1815 and 1818. These designs provided the technical foundation for later developments in gas metering. He spent several years constructing gasworks and offering consulting services for new industry ventures before joining an engineering firm in Liverpool, where he eventually faced severe financial losses.
Public Works and Later Years
After relocating to work for the Portuguese government, he managed the reconstruction of the Lisbon mint and various other public infrastructure projects. Upon returning to England, he turned to railway engineering, specifically collaborating with the Samuda Brothers on an atmospheric propulsion system. The commercial failure of this project effectively ended his active involvement in public affairs. In 1829, he joined the Institution of Civil Engineers, where he participated in professional discussions until his later years. He provided expertise for his son’s 1850 treatise on coal gas manufacture and served as a government surveying officer for new gas bill applications.
Fast facts
- Born: 2 March 1781, Manchester
- Died: 8 January 1861, Middlesex
- Burial location: Highgate Cemetery
- Citizenship: United Kingdom of Great Britain and Ireland
- Primary occupations: Engineer, chemist, civil engineer
- Membership: Institution of Civil Engineers (1829)
Questions readers ask
What was Samuel Clegg’s most significant contribution to gas technology?
He is primarily noted for developing the lime purifier and inventing a water meter for measuring gas consumption.
Where did Samuel Clegg work during his career?
He worked in Manchester, Sowerby Bridge, Dolphinholme, London, Liverpool, and Lisbon, Portugal.
Achievements
- Notable work: coal gasification



