 From the 1840s, the city enjoyed a period of rapid expansion beyond its traditional boundaries, becoming Denmark's second largest city. The city gates were demolished in 1851 and soon afterwards development extended to the area south of the river. Glove production, which had begun in the 18th century, developed into one of the most important industries while the harbour facilities were further expanded. In 1853 Denmark's first modern water and gas works were opened in Odense. Commerce was further boosted by the building of a railway across Funen in 1865, and Odense became one of Denmark's largest rail junctions. All this provided an ideal basis for industrialisation, attracting a wide range of industries including iron and metals, textiles, and food and beverages. Separate areas of the city were devoted to increased industrial and residential expansion, and the population of the city began to grow markedly; by 1900 it had 35,000 inhabitants.
