The firing shrinkage of a clay is usually about the same as the drying shrinkage. Total shrinkage will usually be about 8-12%. The next stage that happens during the firing process is vitrification. This is the hardening, tightening and finally the partial glassification of the clay. Vitrification results from fusions or melting of the various components of the clay.
Middlesboro is served by the Middlesboro-Bell County Airport, which is a single runway, general aviation airport and is the second oldest airport still in use in Kentucky, ranking behind Bowman Field in Louisville.. The airport was established in 1944, however, the first recorded flight into the city was in 1912.
Henderson County TN. From the History of Henderson County Schools by Louise Oakley (County Fair Project 1940) Middlefork got its name of Lick and Lickskillet from a salt lick where deer went to lick salt. Later two men had a fight at the Lick, one struck the other over the head with a skillet.