Section, acts June 28, 1943, ch. 173, title I,
57 Stat. 223; June 26, 1944, ch. 277, title I,
58 Stat. 337; June 13, 1945, ch. 189,
59 Stat. 241; July 1, 1946, ch. 530,
60 Stat. 390, provided for continuation of salaries of clerical assistants to Senators upon death of that Senator in office.