The physical principle of production of mechanical force by the interactions of an electric current and a magnetic field was known as early as 1821.

The Chouteau family operated under the Spanish license at St. Louis in the lower Missouri Valley as early as 1765, but it would be 1821 before the Chouteaus reached Kansas City, when François Chouteau established Chouteau's Landing.

Industrialist Collis P. Huntington ( 1821 – 1900 ) provided crucial funding to complete the Chesapeake and Ohio Railroad ( C & O ) from Richmond, Virginia to the Ohio River in the early 1870s.

Topelius initially thought of writing a trivial entertainment, but having heard extracts from the opera project at a concert in 1851, he realized that Pacius was writing a grand opera on the theme of salvation, following the early Romantic style of Carl Maria von Weber's Der Freischütz ( 1821 ) and Oberon ( 1826 ).

Conquered by the Ottoman Empire in the 15th century, Epirus became semi-independent during the rule of Ali Pasha in the early 19th century, but the Ottomans re-asserted their control in 1821.

The quality workmanship in the carving would not have fit into the incorrect assessment of Hellenistic art and the plinth mysteriously disappeared shortly before the statue was presented to King Louis XVIII in 1821 and evidence of it only survives in two drawings and an early description.

An early map illustrating the route of " El Camino Real " in 1821, along with the 21 Franciscan missions in Alta California.

As early as 1821, he wrote in a letter to fellow antiquarian Schröder that, ” othing is more important than to point out that hitherto we have not paid enough attention to what was found together ,” and, the next year, that ” still do not know enough about most of the antiquities either … only future archaeologists may be able to decide, but they will never be able to do so if they do not observe what things are found together and our collections are not brought to a greater degree of perfection .”

The growth of tourism in the early 19th century led to the formation of the Compagnie des Guides de Chamonix in 1821, to regulate access to the mountain slopes ( which were communally or co-operatively owned ), and this association held a monopoly of guiding from the town until it was broken by French government action in 1892 ; thereafter guides were required to hold a diploma issued by a commission dominated by civil servants and members of the French Alpine Club rather than local residents.

The town was partially laid out in early 1821, and on March 3, 1822 a bill of assurrance was recorded and executed and the town's plat was laid out.

* Jason W. Briggs ( 1821 – 1899 ), a leader in the early history of the Latter Day Saint movement

The town was the home of George W. Sears ( 1821 – 1890 ), a sportswriter for Forest and Stream magazine in the 1880s and an early environmentalist.

' Tennov notes how limerence may dissolve soon after its initiation, as in an early teenage buzz-centered crush ', but is more concerned with the point when ' limerent bonds are characterized by " entropy " crystallization as described by Stendhal in his 1821 treatise On Love, where a new love infatuation perceptually begins to transform ... attractive characteristics are exaggerated and unattractive characteristics are given little or no attention ... a limerent object '.

An early church commission, The Virgin of the Harvest, ( 1819 ), displays a Raphael-esque influence, but another such commission, The Virgin of the Sacred Heart, ( 1821 ), evidences a freer interpretation.

*, a schooner built to suppress piracy and catch slavers, was launched in early August 1821, had a small part in the Amistad trials and was lost at sea in March 1843

A series of delays and complicated negotiations resulted early in 1821 in a duel between Christie and John Scott, in which Scott was killed.

Prior and during the early days of the Greek War of Independence ( 1821 – 1829 ), a large variety of flags was designed, proposed and used by various Greek intellectuals in Western Europe, local leaders, chieftains and regional councils.

He also engraved the early coins of George IV's reign: the Double Sovereign, 1823 ; Sovereign, 1821-1825 ; Half-sovereign, 1821 and 1823-25 ; Crown, 1821-22 ; Pattern Crown ( called " the handsomest coin in Europe " by Denon, Director of the French Mint ) etc.

Earlier, Guatemala had been a state within the United Provinces of Central America since 1823, before that part of the First Mexican Empire under Agustín de Iturbide, and before 1821 ruled by the Captain General of Guatemala, a Spanish colonial official owing allegiance to the Viceroy of New Spain and the King of Spain, back to the Spanish conquest of the region in the early 16th century.

In early June 1821, the 6, 500 men republican army was divided and organized in three divisions.

At the early 19th century many locals joined the Greek patriotic organization Filiki Eteria, while at the outbreak of the Greek War of Independence ( 1821 ) part of the town's youth participated in the struggle under Alexandros Ypsilantis.

Drais also invented the earliest typewriter with a keyboard in 1821, later developed into an early stenograph machine, and a wood-saving cooker including the earliest hay chest.

During the colonial and early years of the Republic, the region was subject to the province of Popayan ; in 1821 it became part of the department of Cauca, and in 1857 it became part of the Federal State of Cauca.

After the London exhibition, Bullock brought the painting to Dublin early in 1821, but the exhibition there was far less successful, in large part due to a competing exhibition of a moving panorama, " The Wreck of the Medusa " by the Marshall brothers firm, which was said to have been painted under the direction of one of the survivors of the disaster.

Under Mao Zedong, the People's Republic of China held its first in 1952, but the second in 1963 was secret and unacknowledged until the early 1980s.

These deliberate acts of violence against civilians were acknowledged by the CIA as early as late 1983, when Duane Clarridge, Latin America division chief of the CIA ’ s Directorate for Operations, reported in a secret briefing to the Senate subcommittee that his contras had murdered " civilians and Sandinista officials in the provinces, as well as heads of cooperatives, nurses, doctors and judges.

Although he doled out offices, money, and titles mainly to Christian highlanders in the hope of co-opting would-be Eritrean opponents in early 1967, the imperial secret police of Ethiopia also set up a wide network of informants in Eritrea and conducted disappearances, intimidations and assassinations among the same populace driving several prominent political figures into exile.

According to Samuel Angus ( 1920 ) gnosis in these early sects was distinct from the secret teachings revealed to initiates once they had reached a certain level of progression akin to arcanum.

In the United States, several secret or semi-secret groups were formed explicitly to advance the rights of homosexuals as early as the turn of the 20th century, but little is known about them.

The planned national uprising, after authorities in the partitions had found out about secret preparations, ended in a fiasco in early 1846.

This secret conspiracy, according to her, had killed many early English sovereigns, through to James I in the early seventeenth century.

He further asserted that for twenty years, starting in the early 1950s, the CIA and the Defense Department conducted secret research ( notably including Project MKULTRA ) in an attempt to develop practical brainwashing techniques, and that their attempt failed.

In the early 1960s a change began to take place, as the word rhetoric and the body of knowledge it covers began to be used again, in a modest and almost secret manner.

* Down Among the Z Men ( 1952 ), played Eccles in a black-and-white secret agent comedy with all the Goons, including early member Michael Bentine and original announcer Andrew Timothy.

In Stephen's words of mourning: By God's secret decision death took him, so that wickedness would not change his soul and false imaginations would not deceive his mind – as the Book of Wisdom teaches about early death.

In early June 1781, Cornwallis dispatched a 250-man cavalry force commanded by Banastre Tarleton on a secret expedition to capture Governor Jefferson and members of the Assembly at Monticello but Jack Jouett of the Virginia militia, thwarted the British plan by warning them.

She is unseen in the early part of the film, the secret of her whereabouts will lead to tragedy.

Maintaining proper depth was a major problem in the early days but Whitehead introduced his " secret " in 1868 which overcame this.

In the early 1990s, Arafat and leading Fatah officials engaged the Israeli government in a series of secret talks and negotiations that led to the 1993 Oslo Accords.

He carried out early experiments on pykrete in a secret location underneath Smithfield Meat Market in the City of London.

Even at his early age, Zapf was already getting involved with type, inventing ciphertext alphabets to exchange secret messages with his brother.

In the early 18th century, shogun Tokugawa Yoshimune founded the oniwaban, an intelligence agency and secret service.

In the early 17th century, the manifestos caused excitement throughout Europe by declaring the existence of a secret brotherhood of alchemists and sages who were preparing to transform the arts, sciences, religion, and political and intellectual landscape of Europe.

The Church Father Hippolytus, writing in the early 3rd century, discloses that " the Athenians, while initiating people into the Eleusinian rites, likewise display to those who are being admitted to the highest grade at these mysteries, the mighty, and marvellous, and most perfect secret suitable for one initiated into the highest mystic truths: an ear of corn in silence reaped.

Those letters, at times very critical of Andreotti, were kept secret for more than a decade, and published only in the early 1990s.

Though their role was generally kept secret in the early stages of the conflict, they made monumental sacrifices to help the U. S., with 18, 000 of their soldiers killed in battle before 1969 alone, and more than 100, 000 Hmong losing their lives by the time the U. S. made the decision to pull out of Vietnam.

One of the most influential revolutionary groups was the Carbonari ( coalmongers ), a secret organization formed in southern Italy early in the 19th century.