Nitrate plants : communication from the President of the United States transmitting draft of proposed legislation making available the sum of $15,000 from the unexpended balance of the appropriation of $20,000,000 provided by the National Defense Act of June 3, 1916, as amended, for the purpose of defraying such expenses as may be necessary and incidental to the arbitration of the rate of royalty to be paid the American Cynamid Co. on patents owned by said company.