- ing completion the finest and largest hydro-electric plant in this country if not in the world, and at the same time a magnificent concrete bridge and boulevard beautifully finished and lighted crossing the scenic Susquehanna at a height of one hundred and eight feet above the bed of the swift flowing

altogether in about 1890, after which the sight of a raft or ark passing below Marietta was a great rarity. The period of its great prosperity was from 1790 to 1870 and it lasted entirely just about 100 years. The story of it is interesting and rather a romantic one. Its pursuit called into action a class of