Waterfall, or Cataract, is the fall or per­pendicular descent of water from a stream or river, found mostly in mountainous regions. It is usually the result of a geológi­ca! upheaval in which ¡mínense masses of rock were shifted hundreds of feet from their former position. In geologic time whole areas were thus elevated and others depressed, and in favorable locations where the fault was abrupt, waterfalls were formed. Subsequent changes resulted from erosion of rocks of different hardness. A remarkable series of waterfalls exists along the inward edge of the Atlantic coastal plain, in the neighborhood of the cities that lie between Trenton, N. J., and Augusta, Ga. Mountain cataracts or cascades make the highest waterfalls. Some of the most important waterfalls and cataracts are: The Falls of Yosemite in California, over 2,500 feet, the highest in the world; the Oroco Falls at Monte Rosa, Switzerland. over 2,000 feet; Victoria Falls in Africa, over 420 feet; Niagara Falls, 165 feet, and Iguassu Falls on the Iguassu River, which separates Argentina and Brazil. In high water the Iguassu Falls are greater in volume than Niagara Falls and are much greater both in height and width; the Gavarnie Falls in the Pyrenees are 1,385 feet; and the Staubbach Falls, Switzerland, 908 feet. Other celebrated waterfalls of the world are: Bridal Veil, Yosemite Park, 620 feet; Chamberlain, British Guiana, 300 feet; Fairy, Rainier Park, 700 feet; Gersoppa, India, 830 feet; Granite, Rainier Park, 350 feet; Illilouette, Yosemite Park, 370 feet; Kalambo, South Africa, 1,400 feet; Multnomah, Oregon, 850 feet; Nevada, Yosemite Park, 594 feet; Ribbon, Yosemite Park, 1,612 feet; Rjukan, Norway, 780 feet; Roraima, British Guiana, 1,500 feet; Skjaeggedalsfos, Norway, 530 feet; Sluiskin, Rainier Park, 1,300 feet; Sutherland, New Zealand 1,904 feet; Takkakaw, British Columbia, 1,200 feet; Vettis, Norway, 950 feet; Voringfos, Norway, 600 feet; Wid-dows' Tears, Yosemite Park, 1,170 feet.