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
Fig. 46.—"Grooves" in Rolls of "Two-high Train" for rolling Rails (1850).
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
