Lever a place to stand, and I shall move the Earth with it' is a remark of Archimedes who formally stated the correct mathematical principle of levers (quoted by Pappus of Alexandria). It is assumed that in ancient Egypt, constructors used the lever to move and uplift obelisks weighing more than 100 tons. A lever is a beam connected to ground by a hinge, or pivot, called a fulcrum. The ideal lever does not dissipate or store energy, which means there is no friction in the hinge or bending in the beam. In this case, the power into the lever equals
Lever Brothers Lever Brothers Lever Brothers was a British manufacturing company founded in 1885 by brothers William Hesketh Lever (1851–1925) and James Darcy Lever (1854–1916). They invested in and successfully promoted a new soap-making process invented by chemist William Hough Watson. In 1930, Lever Brothers merged with Margarine Unie to form Unilever. Starting with a small grocery business begun by his father, William Lever and his brother James entered the soap business in 1885 by buying a small soap works in Warrington. The brothers teamed up with a Bolton chemist, William Hough Watson, who became an early business partner. Watson invented the