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	Artifacts - - 1940s - - Ball canning jar. Title Artifacts - - 1940s - - Ball canning jar. Publisher Muncie, Ind.: Ball Brothers Glass Manufacturing Co. Date 1940s Description 1 canning jar with cap: glass, zinc, aqua; 25 cm. high, 7 cm. in diameter. Notes 2 quart glass Ball Perfect Mason canning jar in light aqua color called Ball blue. It has a continuous screw-thread closure at the neck of the jar with a screw-on zinc lid lined with milk-glass. Ball, Mason or fruit jars are used in canning to preserve fruit, vegetables and meat. In 1858, John Mason patented a continuous screw-thread closure for the neck of canning jars. The improved closure, along with a rubber gasket, made for an air tight seal. Settlers canned fresh food which could then be safely eaten much later. The jars can be reused and are seldom thrown away. Home canners use Ball jars today even though the safe freezing of foods has decreased the need for much canning. Subject Glass fruit jars - - Specimens. Canning and preserving. Cooking (Fruit) Cooking (Vegetables) Format Artifacts Source Courtesy of the Patsy West Collection
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