Kilannan Brewing Company near Owen Sound, Ontario has been brewing an Altbier since 2012. Homebrewing good hard liquor was easier than brewing good beer. Malt extract is frequently used in the brewing of beer. Barley wine is a style of strong beer from the English brewing tradition. Several generations of Adamses were maltsters, who produced the malt necessary for brewing beer. The plant is currently brewing Iron City Beer under contract. Banks & Co has been brewing at the Park Brewery in Wolverhampton since 1875. D.G. Yuengling & Son, America's oldest brewery, has been brewing beer in Pottsville since 1829. They used the microscope to examine foam left over from the process of brewing beer. The AeroPress is a device for brewing coffee. There are three structures for sleeping, cooking, and storage (brewing beer). It has been instrumental in winemaking, baking, and brewing since ancient times. It supports jobs in agriculture, distilling and brewing. Local industries include fishing, brewing and canning. There are many different varieties of hops used in brewing today.