A roller mill designed for home brewing use, manufactured by Valley Brewing Equipment. Like the other mills available to homebrewers, the Valley Mill has a very loyal following. Similar to the Maltmill, but with a larger standard hopper, and parallel roller adjustment. (See mill wars.)
In chemistry, any one of those acids which can be distilled from an Acid aqueous solution at atmospheric pressure, such as acetic, and butyric acid. Fixed acids such as tartaric, phosphoric, etc., cannot be removed by distillation.