Guilderland was from the beginning a location very amenable to early industry due to its numerous streams for waterwheels, large forests for wood fuel, and the fine sand for glass works. In 1795 Jan and Leonard de Neufville (father and son) established a large glass factory mostly for the manufacture of windows but also of bottles of various shapes, sizes, and uses. Around this factory would spring the hamlet of Hamilton (today called Guilderland). The factory could not compete with cheap British imports after the War of 1812 and with its collapse the glass industry would never return to Guilderland. A hat factory and a foundry would both occupy the site over the next 200 years. French's Mills, another hamlet founded on industry, was home to many textile mills thanks to the power harnessed from the falls on the Normans Kill near Guilderland Center.