During the delegation’s tour of Philadelphia, they learned about the city’s famous history of iron and steel manufacturing. Local plants were incredibly successful, due in large part to Pennsylvania’s natural abundance of high-quality coal and iron mines. The industries had transformed the economic and natural landscape of the area, and had also stimulated other forms of production in the city. Kunitake Kume noted that the spinning industry had stimulated the production of cotton, wool, and linen across the state.