19th century In the middle of the nineteenth century, George Boole and then Augustus De Morgan presented systematic mathematical treatments of logic.

Potsdam developed into a centre of science in Germany from the 19th century.

The next major use of mines was during the Russo Japanese War of 1904 1905.

However, the cost of the construction work and maintenance caused the bankruptcy of the Czernin family, who eventually sold the palace to the state in the mid 19th century.

Many prazos had declined by the mid 19th century, but several of them survived.

Until the mid 19th century, a systematic settling of the area was not thought of.

The sport of cricket has been played in Beacon Hill Park since the mid 19th century.

By the middle of the 19th century, the orange business had almost completely disappeared.

It was renovated in the middle of the 19th Century, but also received remodelling in 1880.

In the mid 19th century, the region was known with the Coxilha das Pedras Altas .

Frigates remained a crucial element of navies until the mid 19th century.

With the Industrial Revolution in the 19th century, truss systems of wrought iron were developed for larger bridges, but iron did not have the tensile strength to support large loads.

The basic geography of the Antarctic coastline was not understood until the mid to late 19th century.

The last two were rediscovered and identified as dodo remains in the mid 19th century.

History The village of Vermelho Novo, was founded in the mid nineteenth century, the family Pinto.

History In the middle of the 19th century, Toritama was a cattle farm on the left bank of the Capibaribe River.

In middle of the 19th century, the personnel of the Portuguese Navy underwent militarization.

The middle of the 19th century saw The Great Exhibition of 1851, the first World's Fair, which showcased the greatest innovations of the century.

Its reconstruction, at the end of the 19th century was motivated by councillor José Silvestre Ribeiro.

Guinea's colonial period began with French military penetration into the area in the mid 19th century.

By the mid 19th century, Ceylon tea had become a staple of the British market bringing great wealth to a small number of white tea planters.

Realism The decline of Romanticism, along with a series of social transformations, occurred in the middle of the 19th century.

The Russians began advancing into the Kazakh steppe in the 18th century, and by the mid 19th century all of Kazakhstan was part of the Russian Empire.

19th century However, it was not until the 19th century that research into the subject started to intensify.

From the mid 19th century it belonged to the Sternberg family, one of the oldest Czech noble families.

This principle is known as determinism, a way of thought that deeply influenced Brazilian literature during the mid and late 19th century and the early 20th century.

A desert especially rich in mineral salts is the Atacama Desert, Chile, where sodium nitrate has been mined for explosives and fertilizer since around 1850.

However, Frederick's desk and the armchair in which he died were returned to the room in the middle of the 19th century.

Agence Havas was founded in 1835 by a Parisian translator and advertising agent, Charles Louis Havas, to supply news about France to foreign customers.

The species went from being one of the most abundant birds in the world during the 19th century to extinction early in the 20th century.

The novelist Per Anders Fogelström (1917 1998) wrote a popular series of historical novels depicting life in Stockholm from the mid 18th to mid 20th century.

It was also the first year of the 19th century.

Mid twentieth century By the mid 20th century, in some European countries, women still lacked some significant rights.

The population of the island is believed to have varied from 40,000 60,000 in the period ranging from initial settlement until the mid 19th century.

During the mid to late 19th century a series of ever larger greenhouses were built on the west side of the house, where the current West Wing is located.

Until the mid 19th century, all residents of the village spoke Romansh, but due to increasing trade with the outside world, its usage began to decline.

Nature in the 19th century sense, alright?

The Victorian era of British history (and that of the British Empire) was the period of Queen Victoria's reign from 20 June 1837 until her death, on 22 January 1901.

Despite interruptions, the Ibadi imamate survived until the mid 20th century.

Until the mid 20th century, it was called Segart of Albalat.

Following the expulsion of Christians from Japan in the late 1590s and early 17th century, rōmaji fell out of use, and was only used sporadically in foreign texts until the mid 19th century, when Japan opened up again.

Choro (, cry or lament ), popularly called chorinho ( little cry or little lament ), is an instrumental Brazilian popular music genre which originated in 19th century Rio de Janeiro.

History Sebastião Laranjeiras, had its origin in the mid nineteenth century, in a camp in the name of Boqueirão Palmeiras, belonging to the city of Palmas de Monte Alto.

1800s In the 19th century, several state institutions were established and the city's role as a capital intensified.

Midway through the 19th century, the first highway was built, linking the city with the rest of the country, thereby facilitating access and vehicular traffic.