Fowler's Vacola Fowler's Vacola The Fowler's Vacola jar is a molded glass jar used in canning to preserve food. It is the most popular home canning system in Australia. The system was developed in 1915 in Melbourne, Australia, by Joseph Fowler (28 February 1888 – 24 April 1972), who migrated from England in 1912, at his home in Hawthorn, Victoria, and became very popular. The Fowler's Vacola system uses glass jars, single use rubber ring seals and pressed metal lids, much like American Mason jars first patented in 1858, except that the jars and lids are not threaded. During the canning process,
David S. Mason 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 the Shanghai Lexicographical Publishing House. Mason was born in Washington, D.C. in 1947; received his B.A. in Government from Cornell University in 1969; his M.A. in International Affairs from the Johns Hopkins School of Advanced International Studies in 1971; and his Ph.D. in Political Science