Weck jar secured by steel tension clips which can be removed once a vacuum seal has formed. During storage the vertical position of the rubber seal's external tongue indicates the status of the sealing. Weck products are still produced and are available from German hardware and online stores. Used equipment is frequently sold on online auction sites and in opportunity shops. Weck jar A Weck jar is a molded glass jar used in canning to preserve food. It is popularly used for jam preservation, for its minimal look and foolproof rubber gasket with a glass lid. Weck jars were created by the
John S. Mason colonel of the 9th U.S. Infantry at Fort Whipple, Arizona, and took up residence in Washington, D.C., where he died at home on November 29, 1897, from general paralysis brought about from a stroke. He was buried with full military honors in Section 1, Grave 541, of Arlington National Cemetery. One of his sons, Captain John S. Mason, Jr., perished at the army post at the Pine Ridge Indian Reservation from exposure in the line of duty, and is also buried at Arlington National Cemetery. Another son, Charles, also served in the Army. John S. Mason John Sanford Mason (August