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
Mozambique Drill spinal cord. Rousseau related the story to an acquaintance, small arms expert Jeff Cooper, founder of the Gunsite Academy shooting school, who incorporated the "Mozambique Drill" into his modern technique shooting method. The Mozambique Drill was incorporated in the Gunsite curriculum from the late 1970s. In 1980, two Los Angeles Police Department SWAT officers, Larry Mudgett and John Helms, attended pistol training at Gunsite and received permission from Cooper to teach the technique to the LAPD, and to rename it the Failure Drill (concerned that "Mozambique" might have racist overtones). The Mozambique Drill is intended to ensure that the target