History of the horse in Britain drawn by two horses, the "Dutch plough", was used in eastern England; this was followed in 1730 by the lightweight Rotherham plough, an unwheeled, or "swing" plough. It was advertised as reducing ploughing times by a third, or using a third less horsepower for the same ploughing time. The improved seed drill and horse-hoe were invented by Jethro Tull in 1731; but it took more than 100 years for these designs to come into common use. The earliest horse-powered threshing machines, which were installed permanently in barns, were developed towards the end of the 18th century. The use of fast
Anno 1701 were a target demographic for "Anno 1701". Upon release, "Anno 1701" broke sales records to become the fastest-selling German computer game ever, with more than 200,000 units sold in German-speaking countries during its debut two weeks. In response, Sunflowers forecast 500,000 sales by the end of 2006. It ultimately finished the year with sales of 320,000 copies in the German market alone, for revenues of €12.7 million. This placed it second for 2006, behind "World of Warcraft" at 345,000 units. On March 23, 2007, Sunflowers announced an add-on called "Anno 1701: The Sunken Dragon". It includes new features, new missions,