Show A Nation of Bridge Builders The United States is notably In advance advance ad ad- vance of or all other nations In the science and practice of bridge build build- Ing The increasing demands of commerce commerce com om- merce Justified longer and longer spans the weight of locomotives and trains doubled and trebled the single bridge members increased to one hundred hundred hun hun- dred feet in length and one hundred tons weight wonderful steam hydraulic hydraulic hy hy- hy- hy pneumatic and electric machine machine ma ma- chine tools were made to lo fashion them with and costly special shops were built in this country and operated by thousands of oC men mell The methods and facilities of erection have kept pace with these developments Enormous derricks traveling towers and steel rope tackles operated eight at a U time e eby by a single steam or electric hoisting engine with many other costly special spec spec- ial ml appliances have been provided for assembling the great members quickly quick quick- ly cheaply and safely into the finished span America stands t day te-day day far In advance of all aU the world in the daring daring dareIng dar dare ing designs high quality and econom conom- economical ical leal and rapid construction of many great bridges F. F. F W. W Skinner In Harpers Harper's Harpers Harper's Harpers Harper's Har Har- pers per's Weekly S |