Da Ponte would write his first opera libretto for Salieri, Il ricco d ' un giorno ( A Rich Man for a Day ) in 1784, it was not a success.

Among the most successful of his 37 operas staged during his lifetime were Armida ( 1771 ), La fiera di Venezia ( 1772 ), La scuola de ' gelosi ( 1778 ), Der Rauchfangkehrer ( 1781 ), Les Danaïdes ( 1784 ), which was first presented as a work of Gluck's, La grotta di Trofonio ( 1785 ), Tarare ( 1787 ) ( Tarare was reworked and revised several times as was Les Danaïdes ), Axur, re d ' Ormus ( 1788 ), La cifra ( 1789 ), Palmira, regina di Persia ( 1795 ), Il mondo alla rovescia ( 1795 ), Falstaff ( 1799 ), and Cesare in Farmacusa ( 1800 ).

From October 1784 to September 1786 he was employed by Nepean, who was in charge of the Secret Service relating to the Bourbon Powers, France and Spain, to spy on the French naval arsenals at Toulon and other ports.

From him it has descended continuously, through fifteen individuals, the title being increased to an Earldom in 1784 ; and in 1876 William Nevill 5th Earl ( b. 1826 ), ( d. 1915 ) an indefatigable and powerful supporter of the Tory Party, was created 1st Marquess of Abergavenny.

There was a recorded revolt against Russian workers in Amchitka in 1784.

The first known cable-stayed bridge was designed in 1784 by C. T.

The last of these also contained some oral material and by the end of the 18th century this was becoming increasingly common, with collections including John Ritson's, The Bishopric Garland ( 1784 ), which paralleled the work of figures like Robert Burns and Walter Scott in Scotland.

The museum ’ s first notable addition towards its collection of antiquities, since its foundation, was by Sir William Hamilton ( 1730 – 1803 ), British Ambassador to Naples, who sold his collection of Greek and Roman artefacts to the museum in 1784 together with a number of other antiquities and natural history specimens.

From 1763 to 1784 the island was administratively part of the colony of Nova Scotia and governed from Halifax.

Its first Lieutenant-Governor was Joseph Frederick Wallet DesBarres ( 1784 – 1787 ) and his successor was William Macarmick ( 1787 ).

An order forbidding the granting of land in Cape Breton, issued in 1763, was removed in 1784.

After the American Revolutionary War, King's College briefly became a state entity, and was renamed Columbia College in 1784.

In 1784, the two provinces were divided ; Nova Scotia was split into Nova Scotia, Cape Breton Island ( rejoined to Nova Scotia in 1820 ), Prince Edward Island, and New Brunswick, while Quebec was split into Lower Canada ( southern Quebec ) and Upper Canada ( southern through lower northern Ontario ).

The earliest record of somnambulistic clairvoyance is credited to the Marquis de Puységur, a follower of Mesmer, who in 1784 was treating a local dull-witted peasant named Victor Race.

Denis Diderot ( ; October 5, 1713 – July 31, 1784 ) was a French philosopher, art critic, and writer.

Diderot died of gastrointestinal problems in Paris on July 31, 1784, and was buried in the city's Église Saint-Roch.

David was the third of six children, two daughters and four sons: James ( 1777 – 1847 ), minister at Craig, Ferryden ; David ; David ; George ( 1784 – 1855 ), minister at Scoonie, Fife ; and Patrick ( 1788 – 1859 ), minister at the abbey church, Paisley.

Marie-Antoine Carême was born in 1784, five years before the onset of the Revolution.

Though he had a happy childhood surrounded by his many siblings, his family knew Francis was likely to be a future Emperor ( his uncle Joseph had no surviving issue from either of his two marriages ), and so in 1784 the young Archduke was sent to the Imperial Court in Vienna to educate and prepare him for his future role.

In an open letter dated July 18, 1766 ( the year of Brice's death ) Chase attacked Brice, Walter Dulany, George Steuart ( 1700 – 1784 ), and others for publishing an article in the Maryland Gazette Extraordinary of June 19, 1766, in which Chase had been accused of being: " a busy, reckless incendiary, a ringleader of mobs, a foul-mouthed and inflaming son of discord and faction, a common disturber of the public tranquility ".

Among those accused of atheism was Denis Diderot ( 1713 – 1784 ), one of the Enlightenment's most prominent philosophes, and editor-in-chief of the Encyclopédie, which sought to challenge religious, particularly Catholic, dogma: " Reason is to the estimation of the philosophe what grace is to the Christian ", he wrote.

In May 1784, according to written by Katsuragawa Hoshū interviewing Daikokuya Kōdayū, local Amchitka people revolted against the Russians.

Ethan met his second wife, a young widow by the name of Frances Montresor Brush Buchanan, early in 1784, and married her after a brief courtship on February 16, 1784.

* Essay on natural religion by Allen: Reason: The Only Oracle of Man, published 1784

Aberdeen married firstly Lady Catherine Elizabeth ( 1784 – 1812 ), daughter of John Hamilton, 1st Marquess of Abercorn, and assumed by Royal license the additional surname of Hamilton in 1818.

Bad harvests ( caused in part by extreme weather from El Niño along with volcanic activity at Laki and Grímsvötn in 1783 – 1784 ), rising food prices, and an inadequate transportation system that hindered the shipment of bulk foods from rural areas to large population centers contributed greatly to the destabilization of French society in the years leading up to the Revolution.

Friedrich Wilhelm Bessel ( 22 July 1784 – 17 March 1846 ) was a German mathematician, astronomer, and systematizer of the Bessel functions ( which were discovered by Daniel Bernoulli ).

This had been achieved much earlier for lead and copper as well as for producing pig iron in a blast furnace, but the second stage in the production of bar iron depended on the use of potting and stamping ( for which a patent expired in 1786 ) or puddling ( patented by Henry Cort in 1784 ).

The British Parliament, disturbed by the idea that a great business concern, interested primarily in profit, was controlling the destinies of millions of people, passed acts in 1773 and 1784 that gave itself the power to control company policies and to appoint the highest company official in India, the Governor-General.

Reynolds painted by American artist Gilbert Stuart, oil on canvas, 1784

Engraving of a 1784 steam engine designed by Boulton and Watt.

Sir John Call, member of Parliament and the Royal Society, and former chief engineer of the East India Company, stated the advantages of Norfolk Island in a proposal for colonization he put to the Home Office in August 1784: “ This Island has an Advantage not common to New Caledonia, New Holland and New Zealand by not being inhabited, so that no Injury can be done by possessing it to the rest of Mankind … there seems to be nothing wanting but Inhabitants and Cultivation to make it a delicious Residence.

On 6 December 1786, an Order in Council was issued, designating " the Eastern Coast of New South Wales, or some one or other of the Islands adjacent " as the destination for transported convicts, as required by the Transportation Act of 1784 ( 24 Geo. III, c. 56 ) that authorised the sending of convicted felons to any place appointed by the King in Council.

Original copper engraving of the P. antiquus holotype by Egid Verhelst II and published by Cosimo Collini, 1784

The first Pterodactylus specimen was described by the Italian scientist Cosimo Alessandro Collini in 1784, based on a fossil skeleton unearthed from the Solnhofen limestone of Bavaria.

Engraving of the type specimen | original P. antiquus specimen by Egid Verhelst II, 1784

The first pterosaur fossil was described by the Italian naturalist Cosimo Collini in 1784.

He died prematurely at Chowan County, North Carolina on Aug. 22, 1784, and his two daughters by his wife Sylvia ( Avery ) Stiles of Vermont ( and formerly of Norwich, Connecticut ) had their uncle Jonathan Leavitt appointed their guardian.

His uncle, General Sir Richard Church ( 1784 – 1873 ), achieved fame as a liberator of Greece.

Charles Pinckney was the uncle of Colonel Charles Pinckney ( 1731 – 1784 ) and the great-uncle of Governor Charles Pinckney ( 1757 – 1824 ).

Between 1784 and 1788, he was carried on the books of HMS Europa as a servant to the captain ( his uncle, Alan Gardner ) but most likely his first shipboard service was as a junior midshipman on HMS Goliath.

In 1784 William accompanied his uncle to India, who worked there as an engraver, acting as his assistant in preparing drawings and sketches.