Peter Ewart (14 May 1767 – 15 September 1842) was a British

engineer Engineers, as practitioners of engineering, are professionals who Invention, invent, design, build, maintain and test machines, complex systems, structures, gadgets and materials. They aim to fulfill functional objectives and requirements while ...

who was influential in developing the technologies of

turbine A turbine ( or ) (from the Greek , ''tyrbē'', or Latin ''turbo'', meaning vortex) is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced can be used for generating electrical ...

s and theories of

thermodynamics Thermodynamics is a branch of physics that deals with heat, Work (thermodynamics), work, and temperature, and their relation to energy, entropy, and the physical properties of matter and radiation. The behavior of these quantities is governed b ...

Biography

He was son of the

Church of Scotland The Church of Scotland (CoS; ; ) is a Presbyterian denomination of Christianity that holds the status of the national church in Scotland. It is one of the country's largest, having 245,000 members in 2024 and 259,200 members in 2023. While mem ...

minister of Troqueer near

Dumfries Dumfries ( ; ; from ) is a market town and former royal burgh in Dumfries and Galloway, Scotland, near the mouth of the River Nith on the Solway Firth, from the Anglo-Scottish border. Dumfries is the county town of the Counties of Scotland, ...

, and was one of eleven children. His brother Joseph Ewart became British ambassador to Prussia; John, a doctor, became Chief Inspector of East India Company hospitals in India; and William, father of William Ewart, was business partner of Sir John Gladstone, father of

William Ewart Gladstone William Ewart Gladstone ( ; 29 December 1809 – 19 May 1898) was a British politican, starting as Conservative MP for Newark and later becoming the leader of the Liberal Party (UK), Liberal Party. In a career lasting over 60 years, he ...

, whose godfather he was and whom he was named after. Following graduation from the

University of Edinburgh The University of Edinburgh (, ; abbreviated as ''Edin.'' in Post-nominal letters, post-nominals) is a Public university, public research university based in Edinburgh, Scotland. Founded by the City of Edinburgh Council, town council under th ...

, he was apprenticed to

millwright A millwright is a craftsman or skilled tradesman who installs, dismantles, maintains, repairs, reassembles, and moves machinery in factories, power plants, and construction sites. The term ''millwright'' (also known as ''industrial mechanic'') ...

John Rennie. His work with

water wheel A water wheel is a machine for converting the kinetic energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a large wheel (usually constructed from wood or metal), with numerous b ...

s led him to work with

Matthew Boulton Matthew Boulton ( ; 3 September 172817 August 1809) was an English businessman, inventor, mechanical engineer, and silversmith. He was a business partner of the Scottish engineer James Watt. In the final quarter of the 18th century, the par ...

and

James Watt James Watt (; 30 January 1736 (19 January 1736 OS) – 25 August 1819) was a Scottish inventor, mechanical engineer, and chemist who improved on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1776, which was f ...

for whom by 1790 he was agent in

Manchester Manchester () is a city and the metropolitan borough of Greater Manchester, England. It had an estimated population of in . Greater Manchester is the third-most populous metropolitan area in the United Kingdom, with a population of 2.92&nbs ...

. At the same time as acting as agent he was also trading on his own account as a

, enabling him to provide the complementary shafts, gears and other necessities to harness the power of the Boulton & Watt steam engines. In 1792, frustrated in administering the immature and, as yet, unreliable machinery, he left Boulton and Watt to work in

partnership A partnership is an agreement where parties agree to cooperate to advance their mutual interests. The partners in a partnership may be individuals, businesses, interest-based organizations, schools, governments or combinations. Organizations ...

with Samuel Oldknow in a

cotton Cotton (), first recorded in ancient India, is a soft, fluffy staple fiber that grows in a boll, or protective case, around the seeds of the cotton plants of the genus '' Gossypium'' in the mallow family Malvaceae. The fiber is almost pure ...

bleaching Bleach is the generic name for any chemical product that is used industrially or domestically to remove color from (i.e. to whiten) fabric or fiber (in a process called bleaching) or to disinfect after cleaning. It often refers specifically t ...

and calico

printing Printing is a process for mass reproducing text and images using a master form or template. The earliest non-paper products involving printing include cylinder seals and objects such as the Cyrus Cylinder and the Cylinders of Nabonidus. The ...

venture. He anticipated this being a profitable concern but the partnership was dissolved within a year and he returned to engineering. In 1798 he went into partnership with Samuel Greg, installing an innovative water wheel at Greg's

Quarry Bank Mill Quarry Bank Mill (also known as Styal Mill) in Styal, Cheshire, England, is one of the best preserved Textile manufacture during the British Industrial Revolution, textile factories of the Industrial Revolution. Built in 1784, the cotton mill ...

on the River Bollin in

Cheshire Cheshire ( ) is a Ceremonial counties of England, ceremonial county in North West England. It is bordered by Merseyside to the north-west, Greater Manchester to the north-east, Derbyshire to the east, Staffordshire to the south-east, and Shrop ...

. As a standby, he installed a

Watt steam engine The Watt steam engine design was an invention of James Watt that became synonymous with steam engines during the Industrial Revolution, and it was many years before significantly new designs began to replace the basic Watt design. The Newcomen ...

. By 1811, Ewart had abandoned the venture with Greg to concentrate on his own manufacturing business but also his scientific work. He became, along with

John Dalton John Dalton (; 5 or 6 September 1766 – 27 July 1844) was an English chemist, physicist and meteorologist. He introduced the atomic theory into chemistry. He also researched Color blindness, colour blindness; as a result, the umbrella term ...

, a vice-president of the Manchester Literary and Philosophical Society and became active in the contemporary controversies about

heat In thermodynamics, heat is energy in transfer between a thermodynamic system and its surroundings by such mechanisms as thermal conduction, electromagnetic radiation, and friction, which are microscopic in nature, involving sub-atomic, ato ...

work Work may refer to: * Work (human activity), intentional activity people perform to support themselves, others, or the community ** Manual labour, physical work done by humans ** House work, housework, or homemaking ** Working animal, an ani ...

and

energy Energy () is the physical quantity, quantitative physical property, property that is transferred to a physical body, body or to a physical system, recognizable in the performance of Work (thermodynamics), work and in the form of heat and l ...

. Motivated by a paper of John Playfair and encouraged by Dalton, in 1813 he published "On the measure of moving force" in which he defended the nascent ideas of the

conservation of energy The law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be Conservation law, ''conserved'' over time. In the case of a Closed system#In thermodynamics, closed system, the principle s ...

championed by

John Smeaton John Smeaton (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 scholar, who introduced various ...

. The paper was strongly to influence Dalton's pupil

James Prescott Joule James Prescott Joule (; 24 December 1818 11 October 1889) was an English physicist. Joule studied the nature of heat and discovered its relationship to mechanical work. This led to the law of conservation of energy, which in turn led to the ...

. A vocal advocate of the application of scientific knowledge in engineering, he was one of the founders of the

Manchester Mechanics' Institute The Mechanics' Institute, located at 103 Princess Street, Manchester, England, is notable as the building in which three significant British institutions were founded: the Trades Union Congress (TUC), the Co-operative Insurance Society (CIS) ...

. Ewart took up the post of Chief Engineer and Chief Inspector of Machinery with the Admiralty in 1835 and died on 15 September 1842 at

Woolwich Dockyard Woolwich Dockyard (formally H.M. Dockyard, Woolwich, also known as The King's Yard, Woolwich) was an English Royal Navy Dockyard, naval dockyard along the river Thames at Woolwich - originally in north-west Kent, now in southeast London - whe ...

when a chain snapped as he was supervising the removal of a boiler.

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* * * * * * {{DEFAULTSORT:Ewart, Peter 1767 births 1842 deaths British engineers History of Greater Manchester Industrial accident deaths Accidental deaths in London Alumni of the University of Edinburgh People from Dumfries and Galloway

Biography

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