has led to suggestions for more scientific methods of sentencing, see Smith, Alfred E., Progressive Democracy (1928) 209 et seq.; Warner and Cabot, Judges and Law Reform (1936) 156 et seq.; Cantor, Crime and Society (1939) 254 et seq.; Glueck, Criminal Careers in Retrospect (1943) c. XVII.
If the experience of the District Court for the Southern District of New York — the district having the heaviest volume of federal criminal prosecutions — is a fair guide, the imposition of sentence is more frequently suspended than is its execution. The only practical result of the strained reading of the powers of the district courts by the decision today may well lead trial judges generally to place probationers on probation without any tentative sentence. A construction which leads to such a merely formal result, one so easily defeated in practice, should be avoided unless the purpose, the text and the legislative history of the Act converge toward it. The policy of probation clearly counsels against it, and neither the words of the Act nor their legislative history contradict that policy. So far as it is significant on this phase, the legislative history looks against rather than for such an undesirable construction. In contrast to the present Act, the first measure passed by Congress conferred only the power to suspend execution of sentence and upon its revocation required the defendant “to serve the sentence . . . originally imposed.” H. R. 20414, 64th Cong., 2d Sess. (1917). This enactment suffered a pocket veto. In reporting the present legislation to the House of Representatives, its Committee on the Judiciary explained that “In case of failure to observe these conditions [of probation], those on probation may be returned to the court for sentence.” H. Report No. 1377, 68th Cong., 2d Sess., 2.
And the text of the legislation does not defeat this policy. Indubitably petitioner was arrested and brought before the court during his period of probation. In that event