29 U.S.C. § 15 Pub. L. 89-554, §8(a), Sept. 6, 1966, 80 Stat. 644 Section, act June 5, 1920, ch. 248, §4, 41 Stat. 987, authorized employment by Woman's Bureau of Department of Labor of such employees at such rates of compensation as Congress may provide by appropriation.