The method for preserving food using glass jars was sparked by a contest sponsored by the French military led by Napoleon Bonaparte.  The French military offered a cash prize of 12,000 francs to the person who devised a method to preserve food for long periods of time.
French inventor Nicolas Appert was responsible for introducing the heat seal process of canning in the early 1800s and won the prize.
Later, glass jars came of age. In the late 1850s — 1858 to be exact — when the Mason fruit jar was patented by tin smith John Mason, everything changed in the world of canning. The Mason jar solved the food preservation problem with the use of a lid and rubber seal.
Mason’s patent was for the machine that cut tin into threads making it easy to manufacture a jar with a reusable screw top lid. Mason’s sealing mechanism comprised of a glass container with a thread molded top and a zinc lid with a rubber seal ring was patented Nov. 30, 1858.
Bacteria was killed by heating the jars in hot water and sealing the jar while still hot. The heat seal process gave glass jars an important place in the collectibles realm. Today, collectors look for glass canning jars, also called fruit jars, for canning and for kitchen decoration in the antiques market.
If you think one canning jar is no different from another canning jar, think again.
Clamped glass jars
In 1882, Henry Putnam, of Bennington, Vt., invented a glass canning jar that used a glass lid and a metal clamp closure. Called lightning jars because they could be opened in a flash, the glass lids were popular because they didn’t present as many contamination problems as the zinc lids.
Many companies produced glass canning jars, including Lustre, Climax, Atlas, Swayzee and Samco.
The Buffalo, N.Y., family named Ball (the Ball jar), headed by William Charles Ball and his five brothers, produced paint and oil storage cans. From a new factory in Muncie, Ind., following a fire at their Buffalo facility, the Ball Company began producing glass storage jars. Like Mason jars, Ball jars became a household name. While the majority of glass canning jars sell in the $10 to $75 range, a Ball Perfection half pint glass fruit canning jar sold recently for $600 at auction.
While both Mason and Ball took great strides in the arena of glass canning jars, Alexander Kerr made canning easier for those working in the kitchen, when he introduced a wide mouth, easy-to-fill self-sealing canning jar. His jars allowed a threaded metal ring to stay in place during the heating process. These jars could be quickly filled and re-used, also.
When it comes to determining the value of glass canning jars, look for embossed pattern decoration and lettering advertising the origin and maker of the jar, clear condition with no cracks or chips and the original accessory lid, seal ring or clamp. Happy canning and collecting.
(Dr. Lori hosts antiques appraisal events worldwide. Bring an antique for a free appraisal at Suburban Home and Garden Show in Oaks Feb 21 through 23. Dr. Lori is the star appraiser on Discovery channel. Visit www.DrLoriV.com, www.Facebook.com/DoctorLori or Lori Verderame on Google+ or call (888) 431-1010. )

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