. New guide and key to Niagara Falls : published for the convenience and guidance of tourists and visitors, the information conveyed in this guide is authentic and taken from official sources and is therefore accurate and reliable . lis 167 feet;of the HorseshoeFall, 158 length of thecrest of theAjnerican FallundeL- water is1,030 feet; of theHorseshoe Fall,2,450 feet Theaverage depth ofthei AmericanFall is feet,of the HorseshoeF all, recession ofthe AmericanFall is slight;that of the Horse-shoe Fall aver-ages between four and five feet annually at the apex. The totalf
. New guide and key to Niagara Falls : published for the convenience and guidance of tourists and visitors, the information conveyed in this guide is authentic and taken from official sources and is therefore accurate and reliable . lis 167 feet;of the HorseshoeFall, 158 length of thecrest of theAjnerican FallundeL- water is1,030 feet; of theHorseshoe Fall,2,450 feet Theaverage depth ofthei AmericanFall is feet,of the HorseshoeF all, recession ofthe AmericanFall is slight;that of the Horse-shoe Fall aver-ages between four and five feet annually at the apex. The totalfall of the Niagara River betweeen Lake Erie and Lake Ontariois 326 feet. According to the measurements of the- United States Engi-neer Corps the average flow of the Niagara River is 222,400 cubicfeet per second and the minimum flow about 165,300 cubic feetpe-r second. It is estimated that of this about one-sixth passesover the American Fall and five-sixths over the Horseshoe recession along whole contour Horseshoe Fall, about31/^ ft. per year. Drop in river from Buffalo to Upper ft.; from Upper Rapids to brink of Falls, 49 ft.; drop atAmerican Falls, 167 ft.; from below Falls to Lower Rapids, 99 ft.;. Illuminating and View Point
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