Weck jar 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 J. WECK Company in Germany, who began selling them in 1895. They were initially sold in Germany and began selling outside of Germany in 1902. It soon became the most popular home canning system in Germany and Europe. This system uses glass jars (200 ml–1.5 l), reusable rubber seals, and glass lids. During the canning process the lids are
David S. Mason from Indiana University in 1978. Mason has received research grants from the National Science Foundation, the Rockefeller Foundation, the American Council of Learned Societies, the National Council for Soviet and East European Research, the International Research and Exchanges Board, and the Social Science Research Council. David S. Mason David Stewart Mason (born November 23, 1947) is Professor Emeritus of Political Science at Butler University in Indianapolis. His most recent book, "The End of the American Century" (Rowman & Littlefield, 2008) explores the interrelated dimensions of America's domestic and international decline. That book has been translated and published in China, by