Lesson71Afamousclock
AftertheHousesofParliamentwereburntdownin1834,SirBenjaminHallwasmaderesponsiblefortheconstructionofahugeclock,whichbecameknownasBigBen.Itisveryaccuratedespiteitsimmensesize,foroffcialsfromtheGreenwichObservatoryhavetheclockcheckedtwiceaday.Thisclock,whichhasrarelygonewrong,canbeheardontheB.B.C.whenitisstriking,becausemicrophonesareconnectedtotheclocktower.