Today in 1900, US Patent 642460 A was issued, an invention of Emil Kersten, for his “Apparatus for Producing Wort, Hop-Beer, Washing Filter-Pulp, &c.” There’s no Abstract, but the description states the “object of the invention is to provide a new and improved apparatus for use in breweries for washing and sterilizing the pulp used in filtering or for mashing and hopping purposes, to agitate and leach the pulverized or ground malt with water for producing wort, and to treat the wort with the hops in such a manner as to produce an unfermented liquor of a high quality and in such a state as to facilitate the fermenting process.”