The textile industry started the industrial revolution in the North. Other advances in manufacturing were in making paint, furniture, paper and glass. Between 1814 and 1865, the population grew by a factor of four. Manufacturing output grew to twelve times and the price of manufactured goods grew to eight times what it was before. Most of this growth was in New England. Rivers provided power for mills. In Pennsylvania coal and iron ore were mined. Agriculture remained an important industry in the North. Schools provided education provided a literate supply of workers and inventors. Large ports and ships provided transportation to foreign markets. Also railroads and water transportation such as the Erie Canal provided goods and services further west. A steady supply of immigrants provided much of the labor force that ran the Northern industries. During this period a number of social movements including anti-slavery began to have noticeable effects on society. In 1831 more radical forms of abolitionist movements emerged.