Section 29, acts Mar. 15, 1920, ch. 100, 1, 41 Stat. 530; Mar. 4, 1921, ch. 156, 41 Stat. 1365, related to disposal of surplus material for the Public Health Service. Section 29a, acts Mar. 15, 1920, ch. 100, 4, 41 Stat. 531; Mar. 4, 1921, ch. 156, 41 Stat. 1365, related to charges incurred in the disposal of surplus material.