Compound lever the force of pushing back the stick to the levers and they rub against the wheels, using friction to slow and eventually stop the train. These are everyday applications of this mechanism. A piano key is a compound lever of the first-class, since the fulcrum is between the weight to be moved and the power. The purpose of this lever is to translate a small movement (depression of the key) into a larger and fast movement of the hammer on the strings. The quality of the resulting tone depends on whether the final speed is brought about by gradual or
Hayley Lever with arthritis in his right hand, which prevented him from further travel and forced him to concentrate on still-life subjects instead. As his arthritis advanced, he taught himself to paint with his left hand. However, following the death of his wife Aida in 1949, Lever was confined to his home, where he continued to paint from 1953 until his death. Hayley Lever died on 6 December 1958 at his home in Mount Vernon, New York. News of his death surprised some: Lever had all but disappeared from public view over two decades earlier, despite once having been enormously popular and