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... in _1781 , discovered tlic motion ol ' tlic ; planet Uranus ; Dr _Ji- ; _NNi-: n , who discovered vaccination ior _the small-pox , _the most important ever inadc _for _IlUJiianil- _' , _' ; M . W . rir , an ; iblu i ; icc ! i _; i » ic , who _has invented ...