It also has a very low surface energy (which is what gives cookware coatings the nonstick feature), and possesses the quality of being inert to virtually all chemicals. Examples of fluoropolymers: PTFE (polytetrafluoroethylene) PFA (perfluoroalkoxy) FEP (fluorinated ethylene-propylene)
The Marshall Orr House was built in 1885 by Dr. Samuel Marshall Orr, as a smaller replica of the home of his father, Governor James L. Orr. Gov. Orr's home, known locally as Forest Home and Arlington was demolished in 1956. A physician in Anderson for 35 years, Dr. Orr owned a pharmacy, was involved with Anderson's first building and loan association and served as vice-president of the Farmers and Merchants Bank. In the community, he served as a trustee of Anderson schools and was a vestryman of Grace Episcopal Church for twenty years.
Although simple handheld roller gins have been used in India and other countries since at least 500 AD, the first modern mechanical cotton gin was created by U.S.American inventor Eli Whitney in 1793 and patented in 1794.hitney's cotton gin model was capable of cleaning 50 pounds (23 kg) of lint per day. The model consisted of a wooden cylinder surrounded by rows of slender spikes, which pulled the lint through the bars of a comb-like grid.