Around 1820, Charles Xavier Thomas created the first successful, mass-produced mechanical calculator, the Thomas Arithmometer, that could add, subtract, multiply, and divide.

Around 1820, free reed designs began being created in Europe.

Around 1820 they had settled on the Zambian side at Feira ( now Luangwa ).

Around 1820 an estancia ( station ) was established a few miles north on the banks of the Santa Ana River to accommodate the Mission's sizeable cattle herd.

Around 1820, the two neighbouring villages of St-Arnoult and Crevon were joined with Blainville to become Blainville-Crevon.

Around 1820, the Japanese inventor Kunitomo Ikkansai developed various manufacturing methods for guns, and also created an air gun based on the study of Western knowledge (" rangaku ") acquired from the Dutch in Dejima.

Around 1820 the entire Zugspitzplatt was glaciated, but of this Platt Glacier ( Plattgletscher ) only the Northern and Southern Schneeferner remain.

Around 1820 a new loom was invented in Teufen, allowing embroidery in one go.

Around 1820 Samuel Budgett became a partner and the name became H. H.

Around 1820, William " Killymoon " Steward built one of the first tavern / inns in the area.

Around 1820 " General Geography " was established by Carl Ritter.

Around 1820, at age 19, Heber set out on his own.

Around 1820, it was known as Freeport.

Around 1820 the senior Rowland Hazard renamed the nearby industrial village to Wakefield after the town and family of the same name in England, who were friends of his.

Around 1820, Hicks made the first of his many paintings of The Peaceable Kingdom.

Around 1820 he tried to find a medicine to improve appetite and digestive well-being of the soldiers.

Around 1820, a mestizo rancher named Augustine Machado began grazing his cattle on the Ballona wetlands and claimed a fourteen-thousand acre Mexican land grant that stretched from modern-day Culver City to Pico Boulevard in Santa Monica.

Around the arch and the doors, the portal is sculpted in both a detailed and subtle way.

Around the archivolt at the other end of the entrance passage are sculpted animals and insects, such as beetles, spiders, lizards, butterflies, rats, hares, bats, birds, frogs, and bees ; John Pearson stated that these were to represent the flora and fauna of Canada.

This Three Stooges lineup went on to make a series of popular full-length films from 1959 to 1965, most notably Have Rocket, Will Travel, The Three Stooges Meet Hercules and The Three Stooges Go Around the World in a Daze.

" The revitalized trio starred in several feature-length movies: Have Rocket, Will Travel, Snow White and the Three Stooges, The Three Stooges Meet Hercules, The Three Stooges in Orbit, The Three Stooges Go Around the World in a Daze, and The Outlaws Is Coming.

Around 1488 – 1490, Duknovich went to the Court of King Matthias Corvinus in Buda, where he stayed for a few years, mastering a number of works which are unfortunately all either completely destroyed or badly damaged ( e. g. the Fountain of Hercules in Visegrád ).

The sharpest break with tradition, the past and present of `` White Ring Around a Black Core '', may come with the opening of nearby Montgomery County suburbs to Negro residents and, presumably, the consequent conclusion of some whites that they cannot escape the Negro by fleeing to the suburbs.

* Around 1010, Thorfinnr Karlsefni led an attempted Viking settlement in North America with 160 settlers, but was later driven off by the natives.

Around 500 BCE, following the Achaemenid conquest of Mesopotamia under Darius I, Old Aramaic was adopted by the conquerors as the " vehicle for written communication between the different regions of the vast empire with its different peoples and languages.

Johnson campaigned vigorously, undertaking a public speaking tour of the north, known as the " Swing Around the Circle "; the tour, including speeches in Chicago, St. Louis, Indianapolis and Columbus, proved politically disastrous, with Johnson making distasteful and blasphemous comparisons between himself and Christ, and occasionally engaging in hostile and irrational arguments with hecklers.

Around this time, he started to share a home with Heather Stoney, an actress he had first met ten years earlier.

Around the dynastic Tang, Song, and early Ming Period, cuirasses and plates ( mingguangjia ) were also used, with more elaborate versions for officers in war.

Around 620 species have been recognised so far, with may more undescribed.

( Around 1990, OS / 2 came out with " preemptive multitasking " of DOS, an alternative to DESQview for multi-node BBS.

Around 1990, General Magic's founding, with Bill Atkinson as one of the three co-founders, met the following press in Byte magazine:

Around 60 BC, a group of Boians joined the Helvetians ' ill-fated attempt to conquer land in western Gaul and were defeated by Julius Caesar, along with their allies, in the battle of Bibracte.

Around 60 BC they clashed with the rising power of the Dacians under their king Burebista and were defeated.

Around 78 % of these are in the United States, with Europe having 18 %.

He is credited by many with first popularizing this form of music in the early 1950s with his group Bill Haley & His Comets ( inspired by Halley's Comet ) and million selling hits such as, " Rock Around the Clock ", " See You Later Alligator ", and " Shake Rattle and Roll ".

Around this time he began crafting the bases for his sculptures with much care and originality because he considered them important to the works themselves.

Around the same time, East Bay Ray had tried to pressure the rest of the band to sign to the major record label Polydor Records ; Biafra stated that he was prepared to leave the group if the rest of the band wanted to sign to the label, though East Bay Ray asserts that he recommended against signing with Polydor.

Around the 12th century AD, the Sultanate of Ifat was established in Djibouti and northern Somalia, eastern Ethiopia with its capital at Zeila in northern Somalia.

Around this time, toxicologist David Peakall was measuring DDE levels in the eggs of peregrine falcons and California condors and finding that increased levels corresponded with thinner shells.

Around this time, the county of the City of Dublin was established along with certain liberties adjacent to the city proper.

Around 1994 and 1995, WADs were primarily distributed online over bulletin board systems or sold in collections on compact discs in computer shops, sometimes bundled with editing guide books.

Around the 8th century BC, a kingdom known as D ' mt was established in Eritrea and northern Ethiopia, with its capital at Yeha in northern Ethiopia.

Around this time, he attempted to secure a position with the Tyler administration, claiming he was a member of the Whig Party.

Around this time, Elizabeth also entered into discussion with male medical views regarding women.