No definite date for resuming the contempt of Congress trial of Leon J. Kamin'49 has been set, it was learned yesterday.

Judge Bailey Aldrich'28, who is trying the case without a jury, apparently is wrestling with a crowded legal calendar, and has been unable to inform prosecution lawyers of when he can hear further evidence.

Calvin P. Bartlett and John L. Saltonstall, Jr.'38, Kamin's attorneys, said last night they had no specific information about the reason for the indefinite postponement or when it might, end, but added they hoped for news soon.

Reopening Not Announced

The trial recessed last Thursday, and Judge Aldrich announced no definite time for reopening the trial. It was felt at that time, however, that the trial might resume this morning, or at the latest, tomorrow.

Judge Aldrich began hearing a rail road injury liability suit last Friday. This case, which is being tried before a jury, must be completed before another can be begun or resumed, John F. Davis, assistant clerk of the Federal District Court assigned to Aldrich, explained last night. The railroad trial reopens today.

Davis also said a minor criminal case and four civil suits had been scheduled last June to come next on Aldrich's calendar. Jurors for the criminal case had been ordered to report for duty Thursday. The criminal case is expected to take only one day.