The terms "wilderness," "primitive," "wild," "roadless," "natural," "scenic," "sacred," and "limited" have been used in somewhat confusing manner. At first the Forest Service used the term "wilderness," but later changed this to "primitive" and still later back again to "wilderness," while the Park Service at first used the term "primitive" and later changed this to "wilderness." Recent regulations of the Forest Service with regard to areas that are withheld from commercial exploitation use the term "wilderness" for areas of more than 100,000 acres, and "wild" for areas of 5,000 to 100,000 acres. In 1933 Albright recognized also "sacred" areas, set apart to safeguard unique features of national parks, with no buildings or roads permitted, and "research" areas in national parks and monuments, to be held unmodified in character and administra-

tively isolated from entrance (except in emergency or by special permit) and left undisturbed by man-made development, for purposes of scientific investigation and education. Years later it seems to have occurred to the Park Service that since nearly all of every national park was really wilderness the terms "sacred" and "research" had no definite meaning and they were dropped.!