Show T = A Nation of Bridge Builders The United States is notably In advance ad-vance of all other nations In the science and practice of bridge building build-ing The Increasing demands of commerce com-merce justified longer and longer spans the weight of locomotives and trains doubled and trebled the single bridge members Increased to one hundred hun-dred feet In length and one hundred tons weight wonderful steam hydraulic hy-draulic pneumatic and electric machine ma-chine tools were made to fashion them j with and costly special shops were built In this country and operated bj thousands of men The methods and facilities of erectlbn have kept pace i with these developments Enormous I derricks traveling towers and sleell rope tackles operated eight at a timeE by a single steam or electric hoisting engine with many other costly specIal spec-ial appliances have been provided for assembling the great members quickly quick-ly cheaply and safely Into tho finished span America stands today far la advance of all the world In the daring dar-ing designs high quality and economical econom-ical and rapid construction of ninny great brldgesF W Skinner In Harpers Har-pers Weekly |