firing processes. The strained portions include both inside strains caused during kneading and extrusion as a result of difference of particle orientation and density between the inside and the surface of body material and the surface strains caused during cutting the working of the body. Thus, the cracks discussed in the description of the invention refers to cracks formed in the inside and on the surface of the porcelain during the drying and firing processes.
In short, the feldspathic porcelain of the prior art has a shortcoming in that, when the particle size of the starting material is very fine, the risk of crack occurrence becomes high, and such risk is further increased when such porcelain is used in making large high-voltage insulators or the like in which theTwo nearby schools, Mariam Boyd Elementary School and Warren New Tech High School, were closed on Thursday due to smoke damage, according to an assistant fire chief on the scene.

Officials said the blaze began at the Southern States Farm Supply at 216 West Franklin Street around 6 p.m. on Wednesday. The store sells supplies such as hardware and fertilizer and also provides fuel storage.

Authorities say they heard two explosions come from inside the two city block-long building and were concerned about chemicals in the air, so they evacuated 15 to 20 homes in a five block radius. No one was injured.

On Thursday evening, Warrenton Mayor Pro-Tem Woody King lifted the mandatory evacuation. It is now a voluntary evacuation. People may now return to their homes and businesses, even