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
Had Enough (The Who song) Had Enough (The Who song) "Had Enough" is a song written by The Who bassist John Entwistle, and featured on their eighth studio album, "Who Are You". It was also released as a double A-sided single with "Who Are You", making it Entwistle's second single A-side, after "Postcard" from "Odds & Sods" in 1974. Like "905", "Had Enough" was planned to feature on a rock opera in the process of being written by Entwistle, but was never finished. It was written a long time before work was started on "Who Are You". The lyrics describe the main character of the