You searched for: Issue Dates February 1949 Remove constraint Issue Dates: February 1949 Product Keywords butter Remove constraint Product Keywords: butter Collections Foods, 1940-1966 Remove constraint Collections: Foods, 1940-1966 Defendants Swift & Co. Remove constraint Defendants: Swift & Co. Titles 12659. Adulteration of butter. U. S. v. 26 Cases. Remove constraint Titles: 12659. Adulteration of butter. U. S. v. 26 Cases.