district                 vacator                             reason for change                   successor       date successor seated
0       wisconsin 2nd                  vacant  robert k henry died during previous congress           glenn r davis (r)      seated april 22 , 1947
1      washington 3rd         fred norman (r)                          died april 18 , 1947            russell mack (r)        seated june 7 , 1947
2    pennsylvania 8th     charles gerlach (r)                             died may 5 , 1947  franklin lichtenwalter (r)   seated september 9 , 1947
3       michigan 11th        fred bradley (r)                            died may 24 , 1947          charles potter (r)     seated august 26 , 1947
4           texas 9th  joseph j mansfield (d)                           died july 12 , 1947        clark w thompson (d)     seated august 23 , 1947
5   massachusetts 9th     charles gifford (r)                         died august 23 , 1947        donald nicholson (r)   seated november 18 , 1947
6        indiana 10th  raymond s springer (r)                         died august 28 , 1947            ralph harvey (r)    seated november 4 , 1947
7        virginia 4th      patrick drewry (d)                       died december 21 , 1947          watkins abbitt (d)   seated february 17 , 1948
8       new york 24th    benjamin j rabin (d)                   resigned december 31 , 1947            leo isacson (al)   seated february 17 , 1948
9        kentucky 9th        john robsion (r)                       died february 17 , 1948           william lewis (r)      seated april 24 , 1948
10      missouri 10th   orville zimmerman (d)                           died april 7 , 1948              paul jones (d)    seated november 2 , 1948
11       illinois 7th      thomas l owens (r)                            died june 7 , 1948  vacant until next congress  vacant until next congress
12         texas 15th       milton h west (d)                        died october 28 , 1948           lloyd bentsen (d)    seated december 4 , 1948

Table as JSON:
{"district":{"0":"wisconsin 2nd","1":"washington 3rd","2":"pennsylvania 8th","3":"michigan 11th","4":"texas 9th","5":"massachusetts 9th","6":"indiana 10th","7":"virginia 4th","8":"new york 24th","9":"kentucky 9th","10":"missouri 10th","11":"illinois 7th","12":"texas 15th"},"vacator":{"0":"vacant","1":"fred norman (r)","2":"charles gerlach (r)","3":"fred bradley (r)","4":"joseph j mansfield (d)","5":"charles gifford (r)","6":"raymond s springer (r)","7":"patrick drewry (d)","8":"benjamin j rabin (d)","9":"john robsion (r)","10":"orville zimmerman (d)","11":"thomas l owens (r)","12":"milton h west (d)"},"reason for change":{"0":"robert k henry died during previous congress","1":"died april 18 , 1947","2":"died may 5 , 1947","3":"died may 24 , 1947","4":"died july 12 , 1947","5":"died august 23 , 1947","6":"died august 28 , 1947","7":"died december 21 , 1947","8":"resigned december 31 , 1947","9":"died february 17 , 1948","10":"died april 7 , 1948","11":"died june 7 , 1948","12":"died october 28 , 1948"},"successor":{"0":"glenn r davis (r)","1":"russell mack (r)","2":"franklin lichtenwalter (r)","3":"charles potter (r)","4":"clark w thompson (d)","5":"donald nicholson (r)","6":"ralph harvey (r)","7":"watkins abbitt (d)","8":"leo isacson (al)","9":"william lewis (r)","10":"paul jones (d)","11":"vacant until next congress","12":"lloyd bentsen (d)"},"date successor seated":{"0":"seated april 22 , 1947","1":"seated june 7 , 1947","2":"seated september 9 , 1947","3":"seated august 26 , 1947","4":"seated august 23 , 1947","5":"seated november 18 , 1947","6":"seated november 4 , 1947","7":"seated february 17 , 1948","8":"seated february 17 , 1948","9":"seated april 24 , 1948","10":"seated november 2 , 1948","11":"vacant until next congress","12":"seated december 4 , 1948"}}