Section 311, acts June 3, 1878, ch. 151, 1, 20 Stat. 89; Aug. 4, 1892, ch. 375, 2, 27 Stat. 348; May 18, 1898, ch. 344, 1, 30 Stat. 418, authorized sale of public lands valuable chiefly for timber or stone. Section 312, acts June 3, 1878, ch. 151, 2, 20 Stat. 89; Oct. 28, 1921, ch. 114, 1, 42 Stat. 208; Mar. 3, 1925, ch. 462, 43 Stat. 1145, provided for applications for purchase of timber and stone lands. Section 313, act June 3, 1878, ch. 151, 3, 20 Stat. 90, provided for publication of applications to purchase timber and stone lands, patent and entry.