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 Titles 12659. Adulteration of butter. U. S. v. 26 Cases. Remove constraint Titles: 12659. Adulteration of butter. U. S. v. 26 Cases.