OCTOBER TERM, 1961. Opinion of the Court. 369 U. S. Between 1901 and 1961, Tennessee has experienced substantial growth and redistribution of her population. In 1901 the population was 2,020,616, of whom 487,380 were eligible to vote.' The 1960 Federal Census reports the State's fopulation at 3,567,089, of whom 2,092,891 are eligible to vote." The relative standings of the counties in terms of qualified voters have changed significantly. It is primarily the continued application of the 1901 Apportionment Act to this shifted and enlarged voting population which gives rise to the present controversy. Indeed, the complaint alleges that the 1901 statute, even as of the time of its passage, "made no apportionment of Representatives and Senators in accordance with the constitutional formula . . . , but instead arbitrarily and capriciously apportioned representatives in the Senate and House without reference . . . to any logical or reasonable formula whatever." '1 It is further alleged and "A Documented Survey of Legislative Apportionment in Tennessee, 1870-1957," which is attached as exhibit 2 to the intervening complaint of Mayor West of Nashville, both prepared by the Tennessee State Historian, Dr. Robert H. White. Examples of preliminary steps are: In 1911, the Senate called upon the Redistricting Committee to make an enumeration of qualified voters and to use the Federal Census of 1910 as the basis. Acts of 1911, S. J. Res. No. 60, p. 315. Similarly, in 1961, the Senate called for appointment of a select committee to make an enumeration of qualified voters, Acts of 1961, S.J.Res. No. 47. In 1955, the Senate called for a study of reapportionment. Tenn. S. J., i955, 224; but see id., at 1403. Similarly, in 1961, the House directed the State Legislative Council to study methods of reapportionment. Acts of 1961, H. J. Res. No. 65. "ITwelfth Census of the United States, 1900, Population (Part 1) 39 (1901); (Part 2) 202 (1902). 12 United States Census of Population: 1960, General Population Characteristics-Tennessee, Table 16 (1961). 11In the words of one of the intervening complaints, the apportionment was "wholly arbitrary, . . .and, indeed, based upon no lawfully pertinent factor whatever."

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