Leon J. Kamin '48 left Boston by plane last night despite freezing rains to return to his teaching duties at Queens University in Kingston, Ontario. With him were his wife and five-month-old son, John.

Kamin, who has been a research associate at Queens since last June, had spent the weekend in Cambridge relaxing after he was cleared Thursday of all contempt of Congress charges. He also attended several jubilant celebrations of his acquittal.

Before his departure he said he had "run out of adjectives" to praise his attorneys, Calvin P. Bartlett and John L. Saltonstall, Jr. '38, who have represented him since January 1954, when the charges first arose.