A New Description of Steam Vessels

1850 Scientific American  
Cast and Wrought Iron Ralls. A writer in the Railroad Journal says, with reference to the quality of the rails upon our railroads, that nothing but prejudice prevents the immediate substitution of cast iron for wrought iron railway bars. The Pottsville Mining Register, in alluding to the matter, says that from experiments recently made by the practical men of England, it is proved oon clusively that the strength of cast is only 1-9th less than the wrought article : while the cost is 3-9ths less.
doi:10.1038/scientificamerican03161850-204c fatcat:dp3nj4xhgbgwrdy2psqqxkksye