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 Bayre sculpted Hercules with the Erymanthean Boar, depicting Hercules during his third Labor, where he had to capture, live, a wild boar from Mount Erymanthos.

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 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 100 of these instruments were made during this period.

Around the mid 1960s, boats made of glass-reinforced plastic, more commonly known as fibreglass, became popular, especially for recreational boats.

Around the all-star break they made their second big trade sending OF Cliff Floyd to the Expos for RHP Carl Pavano, RHP Justin Wayne, INF Mike Mordecai, LHP Graeme Lloyd, RHP Don Levinski and INF Wilton Guerrero.

Around 1638, the king of the Miskito visited England and made an alliance with the English crown.

Around the year 197, Rome divided Britannia into two provinces, Britannia Superior and Britannia Inferior ; sometime after 305, Britannia was further divided, and made into an imperial diocese.

Around 1900 an English translation was made by Baha ' i Anton Haddad, which circulated among the early American Bahá ' í community in a typewritten form.

Around the World in 80 Days and Hemingway Adventure are unabridged, while the other four books were made in both abridged and unabridged versions, although the unabridged versions can be very difficult to find.

Around 1816 Michel Chevreul started a study of soaps made from various fats and alkalis.

Around 1560, an Italian couple named Simonio and Lyndiana Bernacotti made what are likely the first blueprints for the modern, wood-encased carpentry pencil.

Around 1927, the virtuoso's situation brightened ; he had exciting commissions from Diaghilev and made concert tours in Russia ; in addition, he enjoyed a very successful staging of The Love for Three Oranges in Leningrad ( as Saint Petersburg was then known ).

Around the same time the development of effective polymerase chain reaction techniques made it possible to apply cladistic methods of analysis to biochemical features as well.

Around mid-century, the Zojirushi corporation, based in Kyoto, made breakthroughs in refrigerator designs, making refrigerators cheaper and more accessible for restaurant proprietors and the general public.

Around 1920, at age 12, Berle made his stage debut in a production of the musical comedy Florodora.

Around 1671, Anne first made the acquaintance of Sarah Jennings, who later became her close friend and one of her most influential advisors.

Around 1711, Pope made friends with Tory writers John Gay, Jonathan Swift, Thomas Parnell and John Arbuthnot, who together formed the satirical Scriblerus Club.

" Around 853 AD, Æthelwulf and his son-in-law, Burgred, King of Mercia, defeated Cyngen ap Cadell of Wales and made the Welsh subject to him.

In March and July 2005, the members of the 1954 – 55 group, now billed as simply The Comets after decades of controversy over the use of the name, made several high-profile concert appearances in New York City and Los Angeles organized by Martin Lewis as part of celebrations marking the 50th anniversary of rock and roll, the release of Blackboard Jungle, the 50th anniversary of " Rock Around the Clock " hitting Number 1, and the 80th birthday of Bill Haley.

Around the same time Lord and Sproxton made their first foray into adult animation with the shorts Down and Out and Confessions of a Foyer Girl, entries in the BBC's Animated Conversations series using real-life conversations as soundtracks.

Around 500 Freed Jamaican slaves made the journey to Freetown in 1800 through the Sierra Leone Company.

* Around 1620: Cornelius Drebbel may have made a crude rebreather: see Rebreather # History of rebreathers.

Around 1100, a tomb for him was made in Enger ; recent excavations have found that the contents of the tomb are indeed early medieval, but it is impossible to decide whether the body is Widukind's.

Around 1982, Mill and her husband made a trip to India, where a zoo curator showed them a feral Indian Mau.

For a long period, stockfish trade made up the bulk of Iceland's exports Around the time Iceland became a vassal state of Norway, a climate shift occurred — a phenomenon now called the Little Ice Age.

Around this time, Miller had finally made enough money from milking cows to buy his first trombone and played in the town orchestra.

Around 1830 to 1832 Joseph Henry made a similar discovery, but did not publish his findings until later.