CHAPTER VI. INVENTION OF CAST STEEL--BENJAMIN HUNTSMAN. Conversion of iron into steel Early Sheffield manufactures Invention of blistered steel Important uses of cast-steel Le Play's writings on the subject Early career of Benjamin Huntsman at Doncaster His experiments in steel-making Removes to the neighbourhood of Sheffield His laborious investigations, failures, and eventual success Process of making cast-steel The Sheffield manufacturers refuse to use it Their opposition foiled How they wrested Huntsman's secret from him Important results of the invention to the industry of Sheffield Henry Bessemer and his process Heath's invention Practical skill of the Sheffield artisans.