Section 41
SEC. 41. The lease of any lands under this chapter shall not confer the right to remove or dispose of any valuable timber except as provided in the regulations of the Bureau of Forestry for cutting timber upon such lands. Nor shall such lease confer the right to remove or dispose of stone, oil, coal, salts. or other minerals, or medicinal mineral waters existing upon the same. The lease as to the part of the land which shall be mineral may be canceled by the Secretary of Agriculture and Commerce, after notice to the lessee, whenever the said part of the land is more valuable for agricultural purposes. The commission of waste or violation of the forestry regulations by the lessee shall work a forfeiture of his last payment of rent and render him liable to immediate dispossession and suit for damage.