Photo, p-03910.jpg, Borcherdt Screens in Austinville, Virginia. A type of rotary screen, often used in mining for separating different materials. Location is Austinville, VA. This is a part of the New Jersey Zinc Historical Collection.The topic area is Historic Images . The author is unknown. This scan was dated unknown. Permit No: 12948. Notes: Courtesy of Franklin Mineral Museum, New Mexico Bureau of Geology and Mineral Resources, Historic Photograph Archives, Socorro, NM 87801.