Section 891, acts July 17, 1916, ch. 245, title I, 22, 39 Stat. 378; Oct. 29, 1949, ch. 786, 4, 63 Stat. 986, covered payments on mortgages pledged as collateral for a bond issue, notice to farm-loan registrar, and cancellation of mortgage and discharge of lien on full payment. Section 892, act July 17, 1916, ch. 245, title I, 22, 39 Stat. 378, covered withdrawal of collateral and substitution of other security. Section 893, act July 17, 1916, ch. 245, title I, 22, 39 Stat. 378; Ex. Ord. No. 6084, Mar. 27, 1933, provided for place and mode of payment of bonds or interest thereon and cancellation of payment. Section 894, act July 17, 1916, ch. 245, title I, 22, 39 Stat. 378, provided for withdrawal of collateral security on surrender of bonds. Section 895, act July 17, 1916, ch. 245, title I, 22, 39 Stat. 378, covered interest payments on pledged securities. Section 896, act July 17, 1916, ch. 245, title I, 22, 39 Stat. 378, provided for payment of bonds, coupons, and interest at maturity. Section 897, acts July 17, 1916, ch. 245, title I, 22, 39 Stat. 378; Mar. 4, 1923, ch. 252, title III, 309, 42 Stat. 1477; Jan. 31, 1934, ch. 7, 8(b), 48 Stat. 347; Aug. 19, 1937, ch. 704, 5(a), 15 (c), 50 Stat. 704, 708; Oct. 4, 1961, Pub. L. 87–353, § 3(i), 75 Stat. 774, provided for a trust fund from payments on mortgages held as collateral. Section 898, act July 17, 1916, ch. 245, title I, 22, 39 Stat. 378, covered deposit of trust funds with registrars as substituted collateral security. Section 899, act July 17, 1916, ch. 245, title I, 22, 39 Stat. 378, covered notice to registrars of dispositions of principal payments on mortgages held as collateral and transfer to registrar on demand.