Compound lever sudden movement of the key. The earliest remaining writings regarding levers date from the 3rd century BC and were provided by Archimedes. ""Give me a place to stand, and I shall move the earth with a lever"" is a remark attributed to Archimedes, who formally stated the correct mathematical principle of levers (quoted by Pappus of Alexandria). The idea of the compound lever is attributed to the Birmingham inventor John Wyatt in 1743, when he designed a weighing machine that used four compound levers to transfer a load from a weighing platform to a central lever from which the weight
Darcy Lever 1965 for a road and river crossing at Darcy Lever. Many bridges were constructed along the length of the canal, most were small allowing access to farmland, although many are wide enough for a horse and cart. In places where the canal crossed important thoroughfares, such as Water Street in Radcliffe, Radcliffe Road in Darcy Lever and Agecroft Road in Salford, larger bridges were constructed. Darcy Lever Darcy Lever is an area of the Metropolitan Borough of Bolton in Greater Manchester, England. Historically part of Lancashire, the area lies on the B6209 (Radcliffe Road), between Bolton and Little Lever. Its