Section 177, act June 25, 1906, ch. 3540, 34 Stat. 463, related to contracts for construction of fortifications and other works of defense.

Section 178, act Apr. 11, 1898, No. 21, 30 Stat. 737, provided for erection of forts in emergency. See sections 4776 and 9776 of Title 10, Armed Forces.

Section 179, act June 30, 1921, ch. 33, § 1, 42 Stat. 81, related to chargeability of appropriations with respect to transportation cost incident to construction and maintenance of seacoast fortifications.