Archibald Cochrane, 9th Earl of Dundonald

FRSE Fellowship of the Royal Society of Edinburgh (FRSE) is an award granted to individuals that the Royal Society of Edinburgh, Scotland's national academy of science and letters, judged to be "eminently distinguished in their subject". This soci ...

(1 January 1748 – 1 July 1831) was a Scottish nobleman and inventor.

Life

The son of

Thomas Cochrane, 8th Earl of Dundonald Thomas Cochrane, 8th Earl of Dundonald (1691 – 31 October 1778) was a Scottish nobleman, army officer and politician. He was Member of Parliament for Renfrewshire, 1722–1727. He served as Commissioner of the Excise for Scotland from 1730 un ...

, he joined the

British Army The British Army is the principal land warfare force of the United Kingdom, a part of the British Armed Forces along with the Royal Navy and the Royal Air Force. , the British Army comprises 79,380 regular full-time personnel, 4,090 Gurk ...

as a youth and also served time in the

Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against F ...

before returning to

Culross Culross (/ˈkurəs/) (Scottish Gaelic: ''Cuileann Ros'', 'holly point or promontory') is a village and former royal burgh, and parish, in Fife, Scotland. According to the 2006 estimate, the village has a population of 395. Originally, Culross ...

in 1778 after inheriting the Earldom of Dundonald from his father. He inherited a title and family lands but little money. Left with no other means of support, Archibald turned to invention. Cochrane's most noted invention was a method for making

coal tar Coal tar is a thick dark liquid which is a by-product of the production of coke and coal gas from coal. It is a type of creosote. It has both medical and industrial uses. Medicinally it is a topical medication applied to skin to treat psoriasi ...

(patented in 1781) on an industrial scale. The British Tar Company invested in a works; it was managed by

John Loudon McAdam John Loudon McAdam (23 September 1756 – 26 November 1836) was a Scottish civil engineer and road-builder. He invented a new process, " macadamisation", for building roads with a smooth hard surface, using controlled materials of ...

. The coke byproduct was used, in part, by an ironworks at

Muirkirk Muirkirk ( gd, Eaglais an t-Slèibh) is a small village in East Ayrshire, southwest Scotland. It is located on the north bank of the River Ayr, between Cumnock and Glenbuck on the A70. Conservation The Muirkirk & North Lowther Uplands Specia ...

, and the flammability of the

coal gas Coal gas is a flammable gaseous fuel made from coal and supplied to the user via a piped distribution system. It is produced when coal is heated strongly in the absence of air. Town gas is a more general term referring to manufactured gaseous ...

byproduct was recognised but not capitalized on. McAdam bought the company, but the deal was troubled. Cochrane hoped that he would be able to sell tar as a sealant for the hulls of ships to the

. After contacts with the

British Admiralty The Admiralty was a department of the Government of the United Kingdom responsible for the command of the Royal Navy until 1964, historically under its titular head, the Lord High Admiral – one of the Great Officers of State. For much of it ...

were made, a test was performed on a

buoy A buoy () is a floating device that can have many purposes. It can be anchored (stationary) or allowed to drift with ocean currents. Types Navigational buoys * Race course marker buoys are used for buoy racing, the most prevalent form of yac ...

. The buoy was coated on one side and left uncoated on the other. After some time the uncoated half was leaking and full of worms and barnacles, while the treated half was in quite good condition. A

patent A patent is a type of intellectual property that gives its owner the legal right to exclude others from making, using, or selling an invention for a limited period of time in exchange for publishing an enabling disclosure of the invention."A p ...

for his invention was drawn up, while the family estates were used as

collateral Collateral may refer to: Business and finance * Collateral (finance), a borrower's pledge of specific property to a lender, to secure repayment of a loan * Marketing collateral, in marketing and sales Arts, entertainment, and media * ''Collate ...

. The coal tar technique was a rival to

copper sheathing Copper sheathing is the practice of protecting the under-water hull of a ship or boat from the corrosive effects of salt water and biofouling through the use of copper plates affixed to the outside of the hull. It was pioneered and developed by ...

, preferred by the Admiralty. It has been argued that there were also powerful interests at play,

shipyard A shipyard, also called a dockyard or boatyard, is a place where ships are built and repaired. These can be yachts, military vessels, cruise liners or other cargo or passenger ships. Dockyards are sometimes more associated with maintenance a ...

s needing the maintenance business. The patent expired, and the Royal Navy eventually adopted the tar mixture. Other experiments with

alum An alum () is a type of chemical compound, usually a hydrated double salt, double sulfate salt (chemistry), salt of aluminium with the general chemical formula, formula , where is a valence (chemistry), monovalent cation such as potassium or a ...

production, making bread from potatoes, and paint manufacturing also proved unprofitable. His experiments with producing

soda Soda or SODA may refer to: Chemistry * Some chemical compounds containing sodium ** Sodium carbonate, washing soda or soda ash ** Sodium bicarbonate, baking soda ** Sodium hydroxide, caustic soda ** Sodium oxide, an alkali metal oxide * Sod ...

from

table salt Salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in the form of a natural crystalline mineral is known as rock salt or halite. Salt is present in vast quantitie ...

proved more successful but were not enough to reverse his financial misfortunes. In 1784, close to the Society's inception, he was elected a Fellow of the

Royal Society of Edinburgh The Royal Society of Edinburgh is Scotland's national academy of science and letters. It is a registered charity that operates on a wholly independent and non-partisan basis and provides public benefit throughout Scotland. It was established i ...

. His proposers were

James Hutton James Hutton (; 3 June O.S.172614 June 1726 New Style. – 26 March 1797) was a Scottish geologist, agriculturalist, chemical manufacturer, naturalist and physician. Often referred to as the father of modern geology, he played a key role i ...

and

Adam Smith Adam Smith (baptized 1723 – 17 July 1790) was a Scottish economist and philosopher who was a pioneer in the thinking of political economy and key figure during the Scottish Enlightenment. Seen by some as "The Father of Economics"——— ...

. Cochrane died impoverished in Paris at the age of 83. The earldom of Dundonald passed to his son Thomas Cochrane.

Family

He married three times. His first wife was Anne Gilchrist, daughter of Captain James Gilchrist whom he married in 1774. After her death, he married Isabella Mayne, a widow and daughter of Samuel Raymond, in 1788. His third wife was Anna Maria Plowden, daughter of Francis Plowden whom he married in 1819. He had four sons: Thomas Cochrane, who succeeded him in the earldom, was a highly successful officer in the Royal Navy, a less-successful politician, and key early leader of several navies of newly independent countries; Basil Cochrane who briefly served in the Royal Navy before transferring to the British Army;

William Erskine Cochrane William is a male given name of Germanic origin.Hanks, Hardcastle and Hodges, ''Oxford Dictionary of First Names'', Oxford University Press, 2nd edition, , p. 276. It became very popular in the English language after the Norman conquest of Eng ...

who served in the British Army; and Archibald Cochrane who also served in the Royal Navy.

The Cochrane brothers

Cochrane's younger brothers also had notable careers. Charles Cochrane (1749-1781) served as a major in the notorious British Legion during the American Revolution; John Cochrane (1750-1801) and

Basil Cochrane Basil Cochrane (22 April 1753 – 12 or 14 August 1826 in Paris, France) was a Scottish civil servant, businessman, inventor, and wealthy nabob of early-19th-century England. Early life The sixth son of Scottish nobleman and politician Thomas ...

(1753-1826) were supply contractors for the British Army and navy; Basil in particular made a fortune providing supplies to the navy in India.

Alexander Cochrane Admiral of the Blue Sir Alexander Inglis Cochrane (born Alexander Forrester Cochrane; 23 April 1758 – 26 January 1832) was a senior Royal Navy commander during the Napoleonic Wars and achieved the rank of admiral. He had previously captain ...

(1758-1832) became an admiral. George (b. 1762) served in the army and in Parliament. Andrew Cochrane-Johnstone, Andrew (1767-1833) was an army officer, colonial governor, member of Parliament, and fraudster. The John Jervis, 1st Earl of St Vincent, Earl of St. Vincent, Admiral of the Fleet, wrote of the Cochrane brothers in 1806, "The Cochranes are not to be trusted out of sight, they are all mad, romantic, money-getting and not truth-telling—and there is not a single exception in any part of the family."History of Parliament Online bio of Cochrane-Johnstone

References

External links

Significant Scots - Archibald CochraneCoal Tar before the Invention of Town Gas
{{DEFAULTSORT:Dundonald, Archibald Cochrane, 9th Earl Earls of Dundonald, 9 Scottish inventors 1748 births 1831 deaths Burials at Père Lachaise Cemetery Cochrane family, Archibald