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
William S. Mason Bureau's pumping station, dedicated in 2017, bears her name. The couple had no children. William S. Mason William Spencer Mason (1832 – March 27, 1899) served as mayor of Portland, Oregon, from 1891 to 1894 and 1898 to 1899. Mason was born in Virginia in 1832. From humble origins, he began his career in railroads in the South and Midwest, continuing in San Francisco in the early 1870s, where he helped organize street railway companies. After moving to the Northwest, he helped construct the Northern Pacific line between Tacoma and Seattle. Moving to Portland in 1881, he established McCraken &