United States Court of Appeals. No. 213, in Supreme Court, Oct. term, 1936, Maryland and Virginia Milk Producers' Association, Incorporated, v. Melvin C. Hazen, George E. Allen, and Daniel I. Sultan, commissioners of District of Columbia, Chatham M. Towers, collector of taxes of District of Columbia, a municipal corporation, and District of Columbia, a municipal corporation; brief for respondent in opposition to petition for writ of certiorari.