Albany was second only to Boston in the number of books produced for most of the 19th century. Jobs in the iron foundries in both the north and south ends of the city attracted thousands of immigrants to the city. Intricate wrought-iron details still enhance many historic buildings in Albany. The iron industry waned by the 1890s, falling victim to the costs associated with a newly unionized workforce and competition from the opening of mines in the Mesabi Range in Minnesota. Albany's other major exports during the 18th and 19th centuries were furs, wheat, meat and lumber; by 1865, there were almost 4,000 saw mills in the Albany area and the Albany Lumber District was the largest lumber market in the nation. Later in the century, much lumber was harvested and processed in the Midwest, particularly Detroit and Chicago. The city was also home to a number of banks. The Bank of Albany (1792–1861) was the second chartered bank in the state of New York. The city was the original home of the Albank (founded in 1820 as the Albany Savings Bank), KeyBank (founded in 1825 as the Commercial Bank of Albany), and Norstar Bank (founded as the State Bank of Albany in 1803). American Express was founded in Albany in 1850 as an express mail business. In 1871, the northwestern portion of Albany—west from Magazine Street—was annexed to the neighboring town of Guilderland after the town of Watervliet refused annexation of said territory. In return for this loss, portions of Bethlehem and Watervliet were added to Albany. Part of the land annexed to Guilderland was ceded back to Albany in 1910, setting up the current western border. In 1908 Albany opened one of the first commercial airports in the world, and the first municipal airport in the United States. Originally located on a polo field on Loudon Road, it moved to Westerlo Island in 1909 and operated there until 1928. The Albany Municipal Airport—jointly owned by the city and county—was moved to its current location in Colonie in 1928. In 1960, the mayor sold the city's stake in the airport to the county, citing budget issues. It was known from then on as Albany County Airport until a massive upgrade and modernization project between 1996 and 1998, when it was rechristened Albany International Airport. By 1916 Albany's northern and southern borders reached their modern courses; Westerlo Island, to the