district                   vacator                           reason for change               successor             date successor seated
0        pennsylvania 4th         john a hanna (dr)                         died july 23 , 1805   robert whitehill (dr)          seated november 7 , 1805
1      georgia at - large          cowles mead (dr)  lost contested election december 24 , 1805    thomas spalding (dr)         seated december 24 , 1805
2      georgia at - large         joseph bryan (dr)                   resigned sometime in 1806       dennis smelt (dr)                september 1 , 1806
3      georgia at - large      thomas spalding (dr)                   resigned sometime in 1806     william w bibb (dr)          seated january 26 , 1807
4        pennsylvania 1st         michael leib (dr)                 resigned february 14 , 1806        john porter (dr)          seated december 8 , 1806
5            maryland 7th   joseph h nicholson (dr)                     resigned march 1 , 1806       edward lloyd (dr)          seated december 3 , 1806
6           virginia 13th  christopher h clark (dr)                      resigned july 1 , 1806  william a burwell (dr)                 december 1 , 1806
7  connecticut at - large     john cotton smith (f)          resigned sometime in august , 1806     theodore dwight (f)                 december 1 , 1806
8        pennsylvania 3rd      christian lower (dr)                 resigned december 19 , 1806                  vacant  not filled for remainder of term

Table as JSON:
{"district":{"0":"pennsylvania 4th","1":"georgia at - large","2":"georgia at - large","3":"georgia at - large","4":"pennsylvania 1st","5":"maryland 7th","6":"virginia 13th","7":"connecticut at - large","8":"pennsylvania 3rd"},"vacator":{"0":"john a hanna (dr)","1":"cowles mead (dr)","2":"joseph bryan (dr)","3":"thomas spalding (dr)","4":"michael leib (dr)","5":"joseph h nicholson (dr)","6":"christopher h clark (dr)","7":"john cotton smith (f)","8":"christian lower (dr)"},"reason for change":{"0":"died july 23 , 1805","1":"lost contested election december 24 , 1805","2":"resigned sometime in 1806","3":"resigned sometime in 1806","4":"resigned february 14 , 1806","5":"resigned march 1 , 1806","6":"resigned july 1 , 1806","7":"resigned sometime in august , 1806","8":"resigned december 19 , 1806"},"successor":{"0":"robert whitehill (dr)","1":"thomas spalding (dr)","2":"dennis smelt (dr)","3":"william w bibb (dr)","4":"john porter (dr)","5":"edward lloyd (dr)","6":"william a burwell (dr)","7":"theodore dwight (f)","8":"vacant"},"date successor seated":{"0":"seated november 7 , 1805","1":"seated december 24 , 1805","2":"september 1 , 1806","3":"seated january 26 , 1807","4":"seated december 8 , 1806","5":"seated december 3 , 1806","6":"december 1 , 1806","7":"december 1 , 1806","8":"not filled for remainder of term"}}