Now, although the roots of the mystery story in serious literature go back as far as Balzac, Dickens, and Poe, it was not until the closing decades of the 19th century that the private detective became an established figure in popular fiction.

This Europeanization of the law was made explicit by a number of 19th century scholars.

The Civil War was a significant force in the eventual dominance of the singular usage by the end of the 19th century.

In the zoological sciences, some of his observations were confirmed to be accurate only in the 19th century.

His works contain the earliest known formal study of logic, which was incorporated in the late 19th century into modern formal logic.

With the Prior Analytics, Aristotle is credited with the earliest study of formal logic, and his conception of it was the dominant form of Western logic until 19th century advances in mathematical logic.

The term was originally coined in the 19th century by the founding sociologist and philosopher of science, Auguste Comte, and has become a major topic for psychologists ( especially evolutionary psychology researchers ), evolutionary biologists, and ethologists.

From its beginnings in the early 19th century through the early 20th century, anthropology in the United States was influenced by the presence of Native American societies.

In Greece, there was since the 19th century a science of the folklore called laographia ( laography ), in the form of " a science of the interior ", although theoretically weak ; but the connotation of the field deeply changed after World War II, when a wave of Anglo-American anthropologists introduced a science " of the outside ".

The Apollo Belvedere is a marble sculpture that was rediscovered in the late 15th century ; for centuries it epitomized the ideals of Classical Antiquity for Europeans, from the Renaissance through the 19th century.

Early 19th century.

In the Middle Bronze Age an apparently " alphabetic " system known as the Proto-Sinaitic script is thought by some to have been developed in the Sinai peninsula during the 19th century BC, by Canaanite workers in the Egyptian turquoise mines.

From the 19th century it once again became more and more popular.

Yombe people | Yombe-sculpture, 19th century

Portugal has been present in Angola for 400 years, occupied the territory in the 19th and early 20th century, and ruled over it for about 50 years.

Distinctions in vocabulary persist, for example, in culinary terms, where communication with Germans is frequently difficult, and administrative and legal language, which is due to Austria's exclusion from the development of a German nation-state in the late 19th century and its manifold particular traditions.

Until the late 19th century, the axiom of choice was often used implicitly, although it had not yet been formally stated.

The Iron is a famous 19th century landmark in central Norrköping

The museum can be found in the 19th century building The Iron in the Motala ström river in central Norrköping.

With the beginning of the slow decline of the Ottoman Empire in the early 19th century, and as a result of the expansionist policies of Czarist Russia in the Caucasus, many Muslim nations and groups in that region, mainly Circassians, Tatars, Azeris, Lezgis, Chechens, and several Turkic groups left their ancestral homelands and settled in Anatolia.

Later in the 19th century, other missionaries adapted Evans ' system to other Canadian aboriginal languages.

Charles Dickens was a prominent English author of the 19th century.

Leo Tolstoy was a prominent Russian author of the 19th century.

* April 19 – American Revolution: Hostility between Britain and its American colonies explodes into bloodshed at the Battles of Lexington and Concord on the 19th, which ignites the American Revolution.

It achieved prominence in the 19th century as a result of most residents of Pacheco relocating to Concord to avoid the devastation of fire and flood which crippled Pacheco's formerly booming economy.

During the 19th century, the Concord River was near the heart of the US Industrial Revolution.

In the early 19th Century, Concord had a significant German immigrant population that was dominant.

Also in the 19th century, Ephraim Bull of Concord, Massachusetts, cultivated seeds from wild labrusca vines to create the Concord grape which would become an important agricultural crop in the United States.

Erected by the Inhabitants of West Cambridge, A. D. 1848, over the common grave of Jason Russell, Jason Winship, Jabez Wyman and nine others, who were slain in this town by the British Troops on their retreat from the Battles of Lexington and Concord, April 19th, 1775.

The east – west portion of the route largely follows the path of the Union Turnpike, built in the early 19th century to connect the communities of Leominster and Concord.

These authors, the former a medieval historian and the latter an early modernist, quickly became associated with the distinctive Annales approach, which combined geography, history, and the sociological approaches of the Année Sociologique ( many members of which were their colleagues at Strasbourg ) to produce an approach which rejected the predominant emphasis on politics, diplomacy and war of many 19th and early 20th-century historians as spearheaded by historians whom Febvre called Les Sorbonnistes.

Aachen became attractive as a spa by the middle of the 17th century, not so much because of the effects of the hot springs on the health of its visitors but because Aachen was then — and remained well into the 19th century — a place of high-level prostitution in Europe.

By the middle of the 19th century, industrialisation swept away most of the city's medieval rules of production and commerce, although the entirely corrupt remains of the city's mediæval constitution was kept in place ( compare the famous remarks of Georg Forster in his Ansichten vom Niederrhein ) until 1801, when Aachen became the " chef-lieu du département de la Roer " in Napoléon's First French Empire.

In 1815 after the Napoleonic Wars, the Kingdom of Prussia took over and the city became one of its most socially and politically backward centres until the end of the 19th century.

While the earliest cuisine of the United States was influenced by indigenous American Indians, the cuisine of the thirteen colonies or the culture of the antebellum American South ; the overall culture of the nation, its gastronomy and the growing culinary arts became ever more influenced by its changing ethnic mix and immigrant patterns from the 18th and 19th centuries unto the present.

During the 19th century, the fields of science and art became increasingly intertwined as scientists such as Michael Faraday began to study the damaging effects of the environment to works of art.

These became established in the 19th century, but the origin of these breeds is uncertain, and a matter of some speculation.

During the latter half of the 19th century, considerable public improvements were made to the town, which became, despite its neighbouring collieries, a pleasant place to live.

The Haworth Art Gallery in Accrington contains an outstanding collection of Tiffany glassware presented to the town by Joseph Briggs, an Accrington man who had joined Tiffany ’ s in the late 19th century and eventually became art director and assistant manager.

The Industrial Revolution transformed Berlin during the 19th century ; the city's economy and population expanded dramatically, and it became the main rail hub and economic center of Germany.

They became an increasing area of interest for scholars in the 19th century and most were recorded or catalogued by George Malcolm Laws, although some have since been found to have British origins and additional songs have since been collected.

When the idea of a modern Olympics became a reality at the end of the 19th century, the initiators and organizers were looking for a great popularizing event, recalling the ancient glory of Greece.

The language became recognizable as Modern Khmer, spoken from the 19th century till today.

In the 19th century, Cuban sugar plantations became the most important world producer of sugar, thanks to the expansion of slavery and a relentless focus on improving the island's sugar technology.

Cretin became a medical term in the 18th century, from an Alpine French dialect prevalent in a region where persons with such a condition were especially common ( see below ); it saw wide medical use in the 19th and early 20th centuries, and then spread more widely in popular English as a markedly derogatory term for a person who behaves stupidly.

In the late 19th century it became common for a number of nations to make bolt-action rifles in both full-length and carbine versions.

In the 19th century, Chicago became the nation's railroad center, a title it still holds.

In America, The American Builder's Companion, written in the early 19th century by the architect Asher Benjamin, influenced many builders in the eastern states, particularly those who developed what became known as the Federal style.

Western cannon during the 19th century became larger, more destructive, more accurate, and could fire at longer range.

In the 19th century, the area's population began to grow as it became a major supplier of wool to the booming textile industry in Britain and shipping traffic increased ( the British, in return, began importing Morocco's now famous national drink, gunpowder tea ).

From a local disease, cholera became one of the most widespread and deadly diseases of the 19th century, killing an estimated tens of millions of people.

In the early 19th century, the custom became popular among the nobility and spread to royal courts as far as Russia.