AMERICAN INDUSTRIES SINCE COLUMBUS. 591 



Md. This mill was designed expressly for this class of work. 

 The first rail rolled was what is known as the U rail, and for this 

 the Franklin Institute awarded its silver medal in October, 1844. 

 Such was the demand for railroad iron that other mills for its 



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production were rapidly constructed. The Montour Rolling Mill 

 at Danville, Pa., was built in 1845, and in October of that year 

 turned out the first T rails made in America. On the 6th of 



