Chicago River, with its entrance protected by a wide-spreading breakwater, is the harbor of the city, and, like its railways, carries the trade. Tunnels conduct various streets under it, and a multitude of bridges go over it, all of them opening to let vessels pass. They are mostly swinging bridges, but some are ingenious constructions, which roll, and lift and fold, and in various curious ways open the channel for the shipping. Huge elevators line the river banks, with vessels alongside, into which streams of grain are poured, while multitudes of cars move in and out, under and around them, bringing the supply from the farm to the storage-bins. In the business section, as elsewhere, the streets are wide, thus accommodating the throngs who fill them, and there are fine city and national buildings, a new Post-office of large size and imposing architecture being in course of construction. The Chicago Public Library, completed in 1897, is a grand structure, costing $2,000,000, and having about three hundred thousand volumes. The University of Chicago, in the southern suburbs, is destined to become one of the leading institutions of learning in America. It began instruction in 1892, and now has some twenty-four hundred students, and endowments of $15,000,000, largely the gifts of John D. Rockefeller. The University grounds cover twenty-four acres, and when the plan is completed there will be over forty buildings. Its libraries contain three hundred and fifty thousand volumes. The great Yerkes Observatory, adjunct to this University, is at Lake Geneva, Wisconsin, seventy miles distant, and has the largest refracting telescope in the world, with forty-inch lens and a tube seventy feet long. On the northern side of the city is the Newberry Library, with $3,000,000 endowment and two hundred thousand volumes, including admirable musical and medical collections, and the Crerar Library, with $2,000,000 endowment, principally for scientific works, is being established on the south side. Chicago's greatest industrial establishment is the Federal Steel Company, having enormous rolling-mills and foundries in various parts of the city, and also at Joliet on Desplaines River. Its South Chicago Rolling Mills occupy over three hundred acres. The manufacture of agricultural machinery is represented by two enormous establishments, the McCormick Harvesting Machine Company on the southwest side and the Deering Works in the northwestern district. CHICAGO BUSINESS ENERGY.