crucible steel continued until well into the 20th century for special uses, as Bessemer's steel was not of the same quality, in the main replacing wrought iron for such applications as rails. Bessemer had tried to induce steelmakers to take up his improved system, but met with general rebuffs, and finally was driven to undertake the exploitation of the process himself. To this end he erected steelworks in Sheffield. Gradually the scale of production was enlarged until the competition became effective, and steel traders generally became aware that the firm of Henry Bessemer & Co. was underselling them to the extent of £20 a ton. One of Bessemer's converters can still be seen at Sheffield's Kelham Island Museum. Stainless steel was discovered by Harry Brearley in 1912, at the Brown Firth Laboratories in Sheffield. His successor as manager at Brown Firth, Dr William Hatfield, continued Brealey's work. In 1924 he patented '18-8 stainless steel', which to this day is probably the most common alloy of this type. These innovations helped Sheffield to gain a worldwide recognition for the production of cutlery; utensils such as the bowie knife were mass-produced and shipped to the United States. The population of the town increased rapidly. In 1736 Sheffield and its surrounding hamlets held about 7000 people, in 1801 there were 60,000, and by 1901, the population had grown to 451,195. This growth spurred the reorganisation of the governance of the town. Prior to 1818, the town was run by a mixture of bodies. The Sheffield Town Trust and the Church Burgesses, for example, divided responsibility for the improvement of streets and bridges. By the 19th century both organisations lacked funds and struggled even to maintain existing infrastructure. The Church Burgesses organised a public meeting on 27 May 1805 and proposed to apply to Parliament for an act to pave, light and clean the city's streets. The proposal was defeated. The idea of a Commission was revived in 1810, and later in the decade Sheffield finally followed the model adopted by several other towns in petitioning for an Act to establish an Improvement Commission. This eventually led to the Sheffield Improvement Act 1818, which established the Commission and included several other provisions. In 1832 the town gained political representation with the formation of a Parliamentary borough. A municipal borough was formed by an Act of Incorporation in 1843, and this borough was granted the