No. 163. February 26, 1940. On Petition to set aside an Order of the National Labor Relations Board. Petition by the Art Metals Construction Company, an employer, to set aside an order of the National Labor Relations Board, directing the employer to bargain collectively with a labor union and its employees, not to interfere with their right to organize, to put in writing any agreement it may reach with them, and to post the usual notices of compliance, wherein the Board requested an enforcement order