Section 91, acts Aug. 19, 1890, ch. 802, 1, 26 Stat. 325; June 10, 1896, ch. 401, 1, 29 Stat. 381, related to sound signals for fog. Section 92, act Aug. 19, 1890, ch. 802, 1, 26 Stat. 325, related to speed in fog.