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Blue Book of American Shipping. 431 The Superior Shipbuilding Co. WEST SUPERIOR, WIS. Modern Plant for the Construe* tion of Steel Vessels and for Ship Repairs of all kinds. Two Dry Docks of sufficient capacity to take care of all classes and sizes of Lake Vessels (p=**<GSQlJ>* STEEL SHIP MATERIAL OF ALL KINDS Jind best quality of Oak for lie pair of Wooden Vessels always on hand. Facilities also for a general line of Tank and Structural Work, D ock E q uip ment, Etc. CONTRAST the wide and clear channel provided for navigation by this Scherzer Rolling Lift Bridge with the two narrow and inadequate channels allowed by the obstructive center-pier swing bridge further up the river. SCHERZER ROLLING LIFT BRIDGES can be opened or closed in less than 30 seconds, and in opening roll back and away from the navigable channel, giving greater freedom for the movement of vessels through the draw than any other type of movable bridge. They can be designed to span any desired width of channel and to meet the most complex local conditions. THE SCHERZER ROLLING LIFT BRIDGE CO., Wain Offices. Monadnock Block, CHICAGO, I. S. A.