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.
The primary coordinate point for Middlefield is located at latitude 41.4593 and longitude -81.0746 in Geauga County. The formal boundaries for the Village of Middlefield (see map below) encompass a land area of 3.04 sq. miles and a water area of 0.02 sq. miles. Geauga County is in the Eastern time zone (GMT -5). The elevation is 1,125 feet.