The owner of the said auxiliary forest reserves shall, at all times, have the right to remove therefrom trees, or portions of trees, which may be killed by fire, thrown or broken by the wind, or injured by other natural causes; and shall, under the direction of the commission,¹ be privileged to make necessary thinnings or removal of undesirable species of trees, in order to improve the condition of the remaining trees; and, under the same direction, may be privileged to remove therefrom such timber, from time to time, as may be necessary and essential for use upon the neighboring cleared lands of the said owner, for general farm purposes.